Spatial–Temporal Water Quality Assessment of the Al‑Gharraf River (Southern Iraq) Using the Arithmetic Weighted Water Quality Index During 2024–2025

Spatial–Temporal Water Quality Assessment of the Al‑Gharraf River (Southern Iraq) Using the Arithmetic Weighted Water Quality Index During 2024–2025

Mohaimen M. Khudhur* Sarmad A. Abbas Ammar Dakhil

Civil Engineering Department, University of Basrah, Basra 61001, Iraq

Directorate of Education, Ministry of Education, Wasit 52001, Iraq

Corresponding Author Email: 
moheimenmaher6@gmail.com
Page: 
403-416
|
DOI: 
https://doi.org/10.18280/ijdne.210209
Received: 
13 December 2025
|
Revised: 
19 February 2026
|
Accepted: 
26 February 2026
|
Available online: 
28 February 2026
| Citation

© 2026 The authors. This article is published by IIETA and is licensed under the CC BY 4.0 license (http://creativecommons.org/licenses/by/4.0/).

OPEN ACCESS

Abstract: 

The Al-Gharraf River is a vital water resource in southern Iraq, particularly in Wasit and Dhi-Qar Governorates, supporting domestic and agricultural uses. This study aims to comprehensively assess the spatiotemporal variations of water quality in the Al-Gharraf River using the Arithmetic Weighted Water Quality Index (AW-WQI) for drinking purposes during December 2024 to November 2025. A total of 240 water samples were collected from 20 monitoring stations along the river through monthly sampling over one year. The AW-WQI was calculated based on key physicochemical and biological parameters, including pH, total dissolved solids (TDS), total suspended solids (TSS), dissolved oxygen (DO), biochemical oxygen demand (BOD₅), sulfate (SO₄²⁻), nitrate (NO₃⁻), phosphate (PO₄³⁻), and lead (Pb²⁺), using standard limits adopted from Iraqi and international guidelines (WHO and USEPA). The results revealed significant spatial and temporal variations in water quality. Water quality was generally good in upstream sections during periods of higher discharge (AW-WQI: 25–50), while it deteriorated during the dry season in downstream areas, exceeding 100 and reaching a maximum of 338 at Al-Nasr station in November. This deterioration was strongly associated with reduced river discharge and increased pollutant loads from untreated domestic wastewater, agricultural runoff, industrial effluents, and fish-farming activities.

Keywords: 

Al-Gharraf River,  Arithmetic Weighted Water Quality Index, Iraq, nutrients, spatial–temporal variation, water pollution, water quality assessment, Water Quality Index

1. Introduction

Surface water is a renewable resource continuously replenished through the hydrological cycle; however, human activities such as excessive abstraction, pollution, and land-use changes can significantly degrade its quality and accessibility [1, 2]. The quality of freshwater is crucial for determining its suitability for various uses and for maintaining the health of associated ecosystems [3]. Contamination from stormwater runoff, agricultural practices, industrial effluents, and untreated domestic wastewater poses a major threat to surface water systems, adversely affecting both human health and aquatic environments [4, 5]. Moreover, increasing pressures resulting from population increase, climatic variability, and competing water demands further exacerbate water quality deterioration [6].

The Al-Gharraf River is one of the most crucial water resources in southern Iraq, particularly in Wasit and Dhi-Qar Governorates. It originates from the Kut Barrage and traverses southwest between the Tigris and Euphrates Rivers over a distance of approximately 230 km until it reaches the marshes of Nasiriyah [7]. Along its course, the river passes through many urban and agricultural regions, such as Al-Mufaqiyah, Al-Hayy, Al-Fajr, Qalat Sukkar, Al-Rifai, and Al-Nasr, which expose it to multiple sources of pollution and hydrological alterations (Figure 1) [7].

Figure 1. Al-Gharraf River and sampling locations

Prior research on the Al-Gharraf River can be broadly classified into two main categories: hydrological and hydraulic investigations, and water quality and pollution studies. Hydrological and hydraulic studies have focused on flow characteristics, discharge behavior, and river modeling. Daham et al. [8] simulated the upper section of the Al-Gharraf River using one- and two-dimensional HEC-RAS models and demonstrated that the two-dimensional model offers a more accurate representation of water levels and flow velocities. Additional research has examined the hydrological characteristics of the river, highlighting the relationships between discharge, water levels, and basin properties, as well as the influence of hydraulic structures on river regulation [9].

Conversely, water quality and pollution studies have investigated the physicochemical and biological properties of the river. Hamza [10] reported increasing salinity and pollutant concentrations over time, indicating a progressive decline in water quality. Al-Seedi and Al-Auboody [11] determined that the river water could be suitable for certain uses under specific conditions. However, Al-Mayah and Al-Azzawi [12] emphasized substantial water quality deterioration, particularly during low-flow periods, due to untreated domestic wastewater, agricultural runoff, and industrial discharges. Additionally, Jabbar [7] investigated the effects of wastewater discharge on the Al-Gharraf River within the Al-Hayy district, demonstrating significant variations in the physical, chemical, and bacteriological characteristics of the river. Furthermore, research using the Water Quality Index (WQI) indicated that water quality in several sections of the river is frequently classified as poor or unsuitable for drinking [13, 14].

Despite these efforts, there remains a need for a comprehensive assessment that integrates spatial and temporal changes in water quality via a unified and systematic approach. The current study aims to evaluate the spatial and temporal variation of water quality in the Al-Gharraf River using the Arithmetic Weighted Water Quality Index (AW-WQI) for drinking water assessment. In addition, the study aims to identify the main sources of pollution and evaluate the combined effects of anthropogenic activities and hydrological conditions on water quality, with the aim of supporting effective water resource management and promoting river sustainability.

2. Materials and Methods

Water samples were collected monthly from 20 monitoring stations along the Al-Gharraf River throughout a one-year period from December 2024 to November 2025. A cumulative total of 240 samples was obtained (20 stations × 12 months). At each location, one sample was collected per month, and no field or laboratory replication was performed. This sampling design allowed for capturing spatial and temporal fluctuations

in water quality under both low-flow (dry season) and high-flow (rainy season) conditions. The locations and geographic coordinates of all sampling stations are listed in Table 1.

In addition to the sampling design, water samples were obtained from depths ranging between 15 and 25 cm below the water surface using pre-cleaned polyethylene bottles to avoid contamination. For dissolved oxygen (DO) analysis, Winkler glass bottles (125 mL capacity) were used to ensure precise preservation. Immediately after collection, samples were tightly sealed and stored in a chilled container with crushed ice, then transported to the laboratory for subsequent analysis.

The water quality assessment was predicated on nine principal physicochemical parameters, including pH, total dissolved solids (TDS), total suspended solids (TSS), DO, biochemical oxygen demand (BOD₅), sulfate (SO₄²⁻), nitrate (NO₃⁻), phosphate (PO₄³⁻), and lead (Pb²⁺).

Table 1. Sampling stations and their geographic coordinates

Station No.

Name of Station

Longitude (E)

Latitude (N)

St.1

Ent. Kut

45.810

32.503

St.2

End Kut

45.843

32.419

St.3

Ent. Al-Mwafaqya

45.920

32.393

St.4

End Al-Mwafaqya

45.930

32.302

St.5

Ent. Al-Hayy

45.955

32.220

St.6

Mid Al-Hayy

46.032

32.156

St.7

End Al-Hayy

46.001

32.090

St.8

Ent. Al-Fajr

45.969

31.989

St.9

End Al-Fajr

45.972

31.901

St.10

Ent. Qalat Sukar

46.055

31.865

St.11

End Qalat Sukar

46.090

31.788

St.12

Ent. Al-Rifai

46.090

31.702

St.13

Mid. Al Rifai

46.099

31.657

St.14

End Al-Rifai

46.107

31.611

St.15

Ent. Al Naser

46.122

31.522

St.16

Mid Al-Naser

46.145

31.482

St.17

End Al-Naser

46.164

31.451

St.18

Ent. Al Shatrah

46.196

31.390

St.19

Mid Al-Shatrah

46.213

31.321

St.20

End Al-Shatrah

46.220

31.228

Figure 2. Field sampling procedure

pH, DO, and TDS were determined in situ using calibrated field instruments. TSS was determined using the gravimetric method, while sulfate, nitrate, and phosphate were analyzed according to standard laboratory protocols established by the study [15]. Lead (Pb²⁺) concentrations were measured using standard analytical techniques. BOD₅ was determined based on DO depletion after incubation at 20 ℃ for five days in accordance with the study [15]. The overall field sampling procedure, preservation of the sample, and in-situ measurements are illustrated in shown Figure 2, which presents sample preparation, field collecting, and measurement processes. A comprehensive quality assurance and quality control (QA/QC) protocol was implemented throughout the study to ensure the reliability and accuracy of the analytical results. All field instruments employed for in-situ measurements (pH, DO, and TDS) were calibrated prior to each sampling campaign according to the manufacturer’s specifications. Laboratory analyses were conducted in accordance with standard methodologies [15]. Field and laboratory blanks were employed to identify potential contamination during sampling and analysis. Samples were analyzed in duplicate to assess analytical precision. The method detection limits (MDL) for all parameters were taken into account during analysis, and all measured concentrations were above the detection limits. Analytical precision was evaluated through relative standard deviation (RSD), which remained within acceptable limits (typically below10%). All procedures were carried out under regulated laboratory conditions to ensure consistency and reproducibility of the results.

To evaluate overall water quality, the AW-WQI was applied, which integrates multiple parameters into a singular dimensionless number, as proposed by Brown et al. [16] and further developed in subsequent studies [14, 17]. Similar approaches have also been used by studies [5, 18-20]. The standard allowable values (Vs) and ideal values (Vi) used in the WQI calculations were approved from the recommended Iraqi and international water quality standards presented in Table 2. The standard permissible values (Vs) were adopted from Iraqi water quality standards (ICS No. 417/2001) and supplemented by relevant international guidelines (WHO and USEPA) where necessary. The standard permissible value (Vs) for DO is established at 5 mg/L according to Iraqi and international water quality standards. The optimal value (Vi) was established at 14 mg/L, denoting the theoretical saturation concentration of DO in water under standard conditions. This value has been extensively utilized in traditional WQI formulations to establish a reliable benchmark for assessing oxygen deviation.

Table 2. Recommended Iraqi and international standards for the water quality parameter

Water Quality Parameters

Unit

V Standard for Water Uses

V Ideal

pH

-

6.5–8.5*

7

TDS

mg/L

1000*

0

TSS

mg/L

25*

0

DO

mg/L

>5*

14

BOD5

mg/L

<5*

0

SO4

mg/L

250*

0

NO3-

mg/L

45*

0

PO4

mg/L

0.4*

0

Pb

ppm

0.01*

0

- Unknown Criteria.

*Iraqi Criteria and Standards of water’s chemical limits, ICS:13.060.20 number 417/2001, first update 2001.

It is recognized that actual DO saturation levels in natural waters, especially in high-temperature areas, may be inferior to this theoretical value. The application of Vi = 14 mg/L guarantees alignment with recognized WQI methodologies and facilitates comparative analysis across various studies. For parameters included in the drinking water assessment, the corresponding drinking-water standards were used. For parameters such as pH and DO, ideal values were taken as 7 and 14 mg/L, respectively, while for the remaining parameters, the ideal value was assumed to be zero. The water quality classification according to the WQI scale is shown in Table 3.

Table 3. Water Quality Index (WQI) scale for drinking water [14]

Water Quality Scale

Quality of Water

0 - 25

Excellent

26 - 50

Good

51 - 75

Poor

76 - 100

Very poor

100 and above

Unsuitable for drinking

The WQI was calculated using the following equations, adopted from [14, 16]:

$W Q I=\sum\left(Q_i \times W_i\right) \sum W_i$           (1)

where,

WQI is the overall Water Quality Index.

Qi is the quality rating of the ith water quality parameter.

Wi is the relative weight of the ith water quality parameter.

Σ is the summation of all selected water quality parameters.

$Q_i=100\left(V_m-V_i\right) /\left(V_s-V_i\right)$            (2)

where,

Qi is the quality rating of the ith parameter.

Vm is the measured value of the water quality parameter obtained from laboratory analysis.

Vi is the ideal value of the parameter.

Vs is the standard permissible value of the parameter according to WHO guidelines.

$W i=(1 / V s)$         (3)

where,

Wi is the relative weight of the ith water quality parameter.

Vs is the standard permissible value of the ith parameter according to WHO guidelines.

3. Results

The AW-WQI values, calculated by nine physicochemical parameters, demonstrate significant spatial and temporal heterogeneity in water quality along the Al-Gharraf River. For clarity, the detailed monthly datasets are included in the Supplementary Material, while the main text summarizes the dominant patterns and key observations.

A heatmap of AW-WQI values was created in order to offer a thorough visualization of these temporal and spatial variations (Figure 3). The detailed monthly AW-WQI values for all monitoring stations are presented in Tables A1-A12 in the Appendix. The months of the study period are displayed along the horizontal axis in this representation, and monitoring stations are positioned along the vertical axis. The water quality classification, which ranges from good to unsuitable conditions, is reflected in the color gradient. The heatmap clearly illustrates the increasing decline in water quality from upstream to downstream stations, as well as the significant rise in AW-WQI values during the dry season.

Figure 3. Heatmap of AW-WQI values along the Al-Gharraf River throughout the study period

3.1 Spatial variation

A distinct spatial gradient in water quality is observed along the river course, with relatively lower AW-WQI values at upstream stations and progressively higher values toward downstream locations.

At Kut Entrance Station (St.1), the AW-WQI values ranged approximately between 35 and 60 over the study period. The station was generally classified as Good to Poor, particularly during the months from December to May, when the values consistently fell within the lower range.

At Kut End Station (St.2), a significant increase in AW-WQI values was recorded compared to St.1. The values ranged approximately between 80 and 140, placing this station predominantly within the Very Poor and Unsuitable classifications for the majority of the months.

At the Al-Muwaffaqiya stations (St.3 and St.4), a contrast between the entrance and end stations was evident. The entrance station (St.3) showed moderate values, typically within the Good to Poor range, whereas the end station (St.4) exhibited higher AW-WQI values, often above 100.

In the central segment of the river, specifically at Al-Hayy stations (St.5–St.7), AW-WQI levels escalated significantly. The midstream station (St.6) consistently recorded higher values than the entrance station, with many months exceeding the threshold of 100.

Further downstream, at Al-Fajr, Qalat Sukar, Al-Rifai, Al-Naser, and Al-Shatrah stations (St.8–St.20), AW-WQI values showed a significant rise. These stations were predominantly classified as Very Poor and Unsuitable, particularly during the dry season.

The maximum AW-WQI values were recorded at downstream stations, particularly at End Al-Naser (St.17) and End Al-Shatrah (St.20), where values exceeded 250 and reached peak values above 300 during late summer.

3.2 Temporal (seasonal) variation

The AW-WQI results showed distinct temporal fluctuations during the research period.

During the winter season (December–February), most upstream and midstream stations recorded relatively lower AW-WQI values, generally within the Good to Poor range. However, downstream stations still exhibited elevated values during this timeframe.

During the spring season (March–May), AW-WQI values remained relatively stable at upstream stations, although moderate increases were observed at midstream and downstream stations.

Figure 4. Water quality index (WQI) for drinking uses along the Al-Gharraf River (December 2024–February 2025)

Figure 5. Water quality index (WQI) for drinking uses along the Al-Gharraf River (March–May 2025)

Figure 6. Water quality index (WQI) for drinking uses along the Al-Gharraf River (June–August 2025)

Figure 7. Water quality index (WQI) for drinking uses along the Al-Gharraf River (September–November 2025)

Conversely, during the summer season (June–August), a significant increase in AW-WQI values was observed across nearly all stations. Most stations shifted into the Very Poor and Unsuitable categories, with some stations exceeding 150 and reaching higher values.

The highest AW-WQI values were noted during late summer and early autumn (August–September), where peak values exceeding 300 were recorded at several downstream stations.

In autumn (September–November), AW-WQI levels were elevated at most sites, especially in downstream areas, with minimal improvement seen.

Figures 4-7 show the WQI for drinking, uses according to AW-WQI for the twenty stations along the Al-Gharraf River during the period from December, 2024 to November, 2025.

3.3 Overall patterns

Overall, the results indicate that:

AW-WQI values exhibit a progressive increase from upstream to downstream stations

Downstream stations consistently record higher values compared to upstream stations

Water quality is often better during winter and spring

Significant deterioration occurs during summer and early autumn

Maximum AW-WQI values are concentrated in the lower reaches of the river.

4. Discussion

The results of the present study indicate a clear spatial and temporal variation in water quality along the Al-Gharraf River, as demonstrated by the AW-WQI values. These variations are shaped by the combined effects of hydrological conditions and human activities along the river course.

From a spatial viewpoint, water quality shows a progressive deterioration from upstream to downstream stations. Upstream sites, particularly at the entrances of cities, generally exhibit lower AW-WQI values due to relatively limited human impact and better dilution conditions. Conversely, downstream stations record significantly higher values, reflecting the cumulative impact of many pollution sources discharged along the river [3, 4].

The temporal variation further supports this pattern. During the wet season (December–May), water quality conditions improve due to increased water availability, which facilitates dilution and reduces pollutant concentrations. However, during the dry season (June–November), reduced water releases are strongly associated with higher AW-WQI values, as the river’s ability to dilute pollutants decreases, leading to elevated contamination levels across most sites [4, 13].

The deterioration in water quality is strongly associated with several anthropogenic factors, including the discharge of untreated domestic wastewater, industrial discharges, and agricultural runoff containing fertilizers and pesticides. These sources contribute to the increase in organic matter, nutrients, and heavy metals in the river water [7, 12].

A pronounced deterioration is observed in the downstream section, particularly within Dhi-Qar Governorate, as indicated by the higher AW-WQI values recorded at these stations. This deterioration may be attributed to increased anthropogenic activities along the river, including the discharge of untreated wastewater and return flows from agricultural and domestic uses. In Iraq, wastewater treatment facilities are often insufficient or poorly maintained, which further contributes to the deterioration of water quality [21, 22]. These spatial and temporal patterns are clearly illustrated by the heatmap (Figure 3), which provides a comprehensive visualization of AW-WQI variation along the river. The heatmap highlights the gradual increase in AW-WQI values from upstream to downstream stations, thereby validating the cumulative impact of pollution sources along the river course. Moreover, higher AW-WQI values are consistently recorded during the dry season across most stations, reflecting the strong influence of reduced dilution capacity.

Moreover, a clear pattern is observed within urban areas, where water quality at mid-city stations is generally worse than at upstream entry points. This can be explained by the fact that the river passes through densely populated city centers, where multiple discharge points are concentrated. Consequently, untreated domestic wastewater and other urban pollutants are directly released into the river, leading to a localized increase in pollutant concentrations. The aggregation of these discharges within the central part of the city results in higher AW-WQI values, highlighting the significant impact of urban activities on river water quality.

Overall, the results show that declining water quality deterioration in the Al-Gharraf River is strongly associated with reduced dilution capacity during the dry season and increasing anthropogenic pressures, particularly in densely populated urban areas and downstream sections of the river [14, 17].

5. Conclusion
  1. Based on the results of this study, the AW-WQI exhibited notable spatial and temporal variations in water quality along the Al-Gharraf River during 2024–2025.
  2. Water quality was relatively better during the period of water abundance and rainfall (December–May), where several upstream stations, especially at city entrances, recorded values within the good to poor categories.
  3. A noticeable deterioration in water quality was noted during the dry season, especially in summer and early autumn, where AW-WQI values ranged from poor to very poor and unsuitable for use at most stations.
  4. Stations located within city centers and downstream ends exhibited poorer water quality compared to entrance stations, underscoring the direct impact of urban discharges on the river.
  5. The deterioration in water quality is strongly associated with reduced water releases from the Tigris River, which reduces the dilution capacity of the Al-Gharraf River and contributes to increased pollutant concentrations.
  6. Untreated domestic wastewater, industrial effluents, and agricultural runoff containing fertilizers and pesticides were identified as major contributors to water pollution, particularly in urban and agricultural regions.
  7. The downstream segment of the river, especially within Dhi-Qar Governorate, showed greater deterioration in water quality compared to upstream and midstream sections due to the cumulative impact of pollution sources.
  8. The absence or limited availability of wastewater treatment plants in urban areas along the Al-Gharraf River significantly contributes to the worsening of water quality.
  9. Fish farming practices and uncontrolled agricultural discharges increase organic loads and nutrient concentrations, negatively affecting the river ecosystem.
  10. From a management perspective, priority initiatives should focus on:
  • Targeting downstream regions, particularly within Dhi-Qar Governorate, as priority areas for pollution management.
  • Controlling key pollutants such as BOD₅, nutrients (NO₃⁻ and PO₄³⁻), and heavy metals (notably Pb²⁺).
  • Reducing direct release of untreated wastewater into the river.
  • Implementing wastewater treatment facilities in major urban centers.
  • Adopting seasonal management measures, including increasing water releases during the dry season to improve dilution capacity.
Nomenclature

Symbol

Description

AW-WQI

Arithmetic Weighted Water Quality Index

WQI

Water Quality Index

Qi

Quality rating of the ith parameter

Wi

Relative weight of the ith parameter

Vm

Measured value of parameter, mg/L

Vi

Ideal value of parameter

Vs

Standard permissible value, mg/L

DO

Dissolved oxygen, mg/L

BOD₅

Biochemical oxygen demand, mg/L

TDS

Total dissolved solids, mg/L

TSS

Total suspended solids, mg/L

SO₄²⁻

Sulfate, mg/L

NO₃⁻

Nitrate, mg/L

PO₄³⁻

Phosphate, mg/L

Pb²⁺

Lead, mg/L

pH

Potential of hydrogen (dimensionless)

Subscripts

i

ith parameter

Appendix

Table A1. Sensitivity of WQPs that were used to calculate AW-WQI for December 2024

ID

Name of Station

QI

SUM WIQI

AW-WQI Value

Water Quality Rating

pH

TDS mg/l

TSS mg/l

DO mg/l

BOD5 mg/l

SO4 mg/l

NO3

PO4 mg/l

Pb+2 ppm

St.1

Ent. Kut

85.9

80.0

72.4

55.6

18.6

98.0

12.9

47.5

50.0

5147.3

49.9

Good

St.2

End Kut

83.5

87.5

256.0

48.5

44.0

130.0

23.3

90.0

103.0

10564.7

102.5

Unsuitable

St.3

Ent. Al-Muwaffaqiya

85.9

81.5

112.0

53.8

30.6

99.6

16.7

55.5

72.0

7371.1

71.5

Poor

St.4

End Al-Muwaffaqiya

83.9

88.5

272.0

53.2

50.0

128.8

26.9

93.8

150.0

15277.0

148.2

Unsuitable

St.5

Ent. Al-Hayy

84.7

83.5

236.0

52.6

38.0

110.0

16.0

70.0

80.0

8213.4

79.7

Very Poor

St.6

Mid Al-Hayy

82.5

91.0

384.0

56.2

90.0

146.0

20.7

148.0

205.0

20925.4

203.0

Unsuitable

St.7

End Al-Hayy

84.7

86.5

340.0

49.5

58.0

116.0

18.4

90.0

120.0

12271.0

119.0

Unsuitable

St.8

Ent. Al-Fajr

85.8

84.2

288.0

48.5

44.0

111.2

16.2

80.5

93.0

9542.3

92.6

Very Poor

St.9

End Al-Fajr

84.1

95.0

340.0

51.0

77.6

96.8

22.2

130.0

187.0

19075.2

185.0

Unsuitable

St.10

Ent. Qalat Sukar

84.7

85.0

296.0

49.0

50.4

123.6

20.0

91.8

110.0

11272.1

109.3

Unsuitable

St.11

End Qalat Sukar

83.6

95.2

380.0

54.9

94.0

144.0

30.7

147.5

190.0

19424.9

188.4

Unsuitable

St.12

Ent. Al-Rifai

84.7

89.0

340.0

49.5

64.0

126.4

20.4

91.0

93.0

9574.8

92.9

Very Poor

St.13

Mid. Al Rifai

83.5

90.0

356.0

54.9

90.0

136.0

24.7

105.0

125.0

12816.7

124.3

Unsuitable

St.14

End Al-Rifai

83.5

91.0

340.0

51.5

78.0

128.8

19.3

72.5

100.0

10231.6

99.3

Very Poor

St.15

Ent. Al Naser

84.1

96.0

432.0

53.2

91.0

146.0

26.2

105.0

150.0

15319.8

148.6

Unsuitable

St.16

Mid Al-Naser

84.1

93.5

360.0

52.1

77.0

134.0

22.7

97.5

125.0

12795.0

124.1

Unsuitable

St.17

End Al-Naser

82.9

100.1

520.0

58.8

110.0

159.2

32.9

172.5

200.0

20497.0

198.8

Unsuitable

St.18

Ent. Al Shatrah

83.5

92.8

392.0

61.0

84.0

138.0

24.9

100.0

100.0

10305.7

100.0

Very Poor

St.19

Mid Al-Shatrah

83.8

91.8

388.0

61.7

84.6

132.8

22.7

96.8

168.0

17097.6

165.9

Unsuitable

St.20

End Al-Shatrah

82.9

97.4

440.0

62.5

104.0

149.6

31.3

147.3

215.0

21930.2

212.7

Unsuitable

Wi

0.1176

0.001

0.04

0.2

0.2

0.004

0.0222

2.5

100

$\sum \boldsymbol{W} \boldsymbol{i}=103.0848$

Table A2. Sensitivity of WQPs that were used to calculate AW-WQI for January 2025

ID

Name of Station

QI

SUM WIQI

AW-WQI Value

Water Quality Rating

pH

TDS mg/l

TSS mg/l

DO mg/l

BOD5 mg/l

SO4 mg/l

NO3

PO4 mg/l

Pb+2 ppm

St.1

Ent. Kut

85.9

80.0

88.0

49.0

16.0

92.4

12.1

43.3

50.0

5135.5

49.8

Good

St.2

End Kut

83.5

86.5

84.0

52.6

38.0

88.0

20.8

86.5

93.0

9548.5

92.6

Very Poor

St.3

Ent. Al-Muwaffaqiya

84.9

81.1

88.0

49.0

25.4

100.4

15.4

55.0

75.0

7666.7

74.4

Poor

St.4

End Al-Muwaffaqiya

83.3

88.5

128.0

54.9

45.0

108.8

23.7

93.8

150.0

15270.3

148.1

Unsuitable

St.5

Ent. Al-Hayy

83.6

81.1

96.0

49.5

24.4

110.0

16.0

61.3

74.0

7582.5

73.6

Poor

St.6

Mid Al-Hayy

82.5

94.5

216.0

55.6

62.0

96.8

22.7

133.0

196.0

19975.3

193.8

Unsuitable

St.7

End Al-Hayy

84.5

83.5

100.0

49.5

56.0

98.0

19.6

81.3

190.0

19239.1

186.6

Unsuitable

St.8

Ent. Al-Fajr

82.8

83.0

80.0

49.0

44.0

102.0

16.4

80.5

83.0

8533.6

82.8

Very Poor

St.9

End Al-Fajr

82.7

92.0

96.0

54.3

62.0

100.0

21.3

120.5

176.0

17939.1

174.0

Unsuitable

St.10

Ent. Qalat Sukar

84.9

83.0

88.0

50.0

45.4

102.0

18.7

84.8

97.0

9945.4

96.5

Very Poor

St.11

End Qalat Sukar

82.4

95.0

320.0

55.6

51.0

135.2

31.4

125.0

163.0

16657.6

161.6

Unsuitable

St.12

Ent. Al-Rifai

83.5

89.0

264.0

52.1

60.0

118.0

20.0

86.3

80.0

8259.4

80.1

Very Poor

St.13

Mid. Al Rifai

83.3

88.7

240.0

53.8

84.0

122.4

24.0

105.0

125.0

12810.6

124.3

Unsuitable

St.14

End Al-Rifai

83.1

89.0

140.0

51.5

44.8

98.0

18.3

56.8

119.0

12077.4

117.2

Unsuitable

St.15

Ent. Al Naser

82.7

65.0

188.0

53.2

77.0

142.0

23.6

99.0

98.2

10111.9

98.1

Very Poor

St.16

Mid Al-Naser

83.3

90.8

296.0

55.6

76.0

130.0

21.1

93.8

180.0

18283.4

177.4

Unsuitable

St.17

End Al-Naser

89.4

100.5

540.0

61.7

90.0

134.0

27.8

138.8

160.0

16410.6

159.2

Unsuitable

St.18

Ent. Al Shatrah

85.9

94.0

332.0

61.0

81.6

106.0

23.6

85.0

100.0

10265.4

99.6

Very Poor

St.19

Mid Al-Shatrah

83.5

92.0

248.0

63.3

84.0

110.8

19.0

96.5

173.0

17591.4

170.6

Unsuitable

St.20

End Al-Shatrah

83.3

97.0

368.0

62.5

56.6

134.4

24.0

108.0

195.0

19819.5

192.3

Unsuitable

Wi

0.1176

0.001

0.04

0.2

0.2

0.004

0.0222

2.5

100

$\sum \boldsymbol{W} \boldsymbol{i}=103.0848$

Table A3. Sensitivity of WQPs that were used to calculate AW-WQI for February 2025

ID

Name of Station

QI

SUM WIQI

AW-WQI Value

Water Quality Rating

pH

TDS mg/l

TSS mg/l

DO mg/l

BOD5 mg/l

SO4 mg/l

NO3

PO4 mg/l

Pb+2 ppm

St.1

Ent. Kut

85.9

80.0

96.0

50.0

16.0

91.6

11.8

46.3

48.0

4943.5

48.0

Good

St.2

End Kut

83.5

87.0

80.0

50.5

38.0

102.0

20.5

84.8

83.0

8543.5

82.9

Very Poor

St.3

Ent. Al-Muwaffaqiya

84.9

81.1

92.0

49.0

25.4

100.0

15.2

56.3

70.0

7170.0

69.6

Poor

St.4

End Al-Muwaffaqiya

83.3

89.7

96.0

51.0

47.2

99.2

24.0

92.3

90.0

9264.9

89.9

Very Poor

St.5

Ent. Al-Hayy

84.7

80.0

100.0

49.0

21.8

102.0

15.8

68.5

73.0

7500.2

72.8

Poor

St.6

Mid Al-Hayy

82.8

91.8

104.0

61.8

62.0

104.0

22.7

113.8

112.0

11524.0

111.8

Unsuitable

St.7

End Al-Hayy

84.5

82.0

96.0

52.8

57.0

100.0

19.4

83.3

95.0

9744.8

94.5

Very Poor

St.8

Ent. Al-Fajr

83.5

82.5

92.0

54.9

43.6

100.0

15.4

77.5

75.0

7727.8

75.0

Poor

St.9

End Al-Fajr

83.3

93.5

100.0

55.4

62.0

96.8

19.8

88.3

115.0

11758.8

114.1

Unsuitable

St.10

Ent. Qalat Sukar

84.7

88.4

104.0

50.6

46.8

102.8

18.0

91.3

85.0

8762.6

85.0

Very Poor

St.11

End Qalat Sukar

82.8

94.5

100.0

55.2

57.0

100.8

28.4

106.3

127.0

13002.9

126.1

Unsuitable

St.12

Ent. Al-Rifai

83.9

86.9

92.0

49.8

64.0

100.8

19.6

89.3

89.0

9160.3

88.9

Very Poor

St.13

Mid. Al Rifai

82.8

89.7

96.0

56.2

66.0

108.8

22.0

102.0

138.0

14094.0

136.7

Unsuitable

St.14

End Al-Rifai

83.3

89.3

104.0

53.8

60.0

100.4

18.0

71.3

132.0

13415.7

130.1

Unsuitable

St.15

Ent. Al Naser

82.8

95.5

100.0

56.8

79.6

115.2

22.7

98.8

96.0

9889.0

95.9

Very Poor

St.16

Mid Al-Naser

83.2

92.0

96.0

55.6

62.0

114.0

21.1

80.0

151.0

15338.1

148.8

Unsuitable

St.17

End Al-Naser

81.6

98.4

88.0

61.7

64.0

98.0

23.6

115.5

155.0

15828.0

153.5

Unsuitable

St.18

Ent. Al Shatrah

82.5

91.8

100.0

62.3

62.0

90.0

22.4

102.5

100.0

10295.8

99.9

Very Poor

St.19

Mid Al-Shatrah

83.2

91.5

100.0

59.5

66.0

100.0

18.1

100.0

152.0

15489.8

150.3

Unsuitable

St.20

End Al-Shatrah

81.5

97.5

104.0

62.5

55.0

114.0

22.2

104.5

185.0

18799.5

182.4

Unsuitable

Wi

0.1176

0.001

0.04

0.2

0.2

0.004

0.0222

2.5

100

$\sum \boldsymbol{W} \boldsymbol{i}=103.0848$

Table A4. Sensitivity of WQPs that were used to calculate AW-WQI for March 2025

ID

Name of Station

QI

SUM WIQI

AW-WQI Value

Water Quality Rating

pH

TDS mg/l

TSS mg/l

DO mg/l

BOD5 mg/l

SO4 mg/l

NO3

PO4 mg/l

Pb+2 ppm

St.1

Ent. Kut

95.3

59.0

96.0

51.0

21.6

64.0

13.1

40.3

36.0

3730.8

36.2

Good

St.2

End Kut

90.4

70.0

248.0

62.4

64.0

100.8

18.1

63.8

75.0

7706.1

74.8

Poor

St.3

Ent. Al-Muwaffaqiya

95.5

65.5

188.0

54.1

43.8

74.0

13.7

46.3

45.0

4654.6

45.2

Good

St.4

End Al-Muwaffaqiya

88.1

85.2

308.0

63.9

71.0

99.2

20.2

72.0

78.0

8030.6

77.9

Very Poor

St.5

Ent. Al-Hayy

95.3

69.8

180.0

57.2

46.4

80.0

15.7

88.8

48.0

5061.7

49.1

Good

St.6

Mid Al-Hayy

84.5

87.6

360.0

65.1

116.6

113.2

22.8

102.5

98.0

10118.0

98.2

Very Poor

St.7

End Al-Hayy

94.2

72.0

242.0

59.2

64.0

90.0

17.5

66.3

90.0

9211.8

89.4

Very Poor

St.8

Ent. Al-Fajr

95.1

69.0

204.0

57.3

50.4

73.6

15.6

53.3

70.0

7174.7

69.6

Poor

St.9

End Al-Fajr

85.9

85.5

333.2

64.1

114.0

104.0

22.2

98.8

95.0

9806.9

95.1

Very Poor

St.10

Ent. Qalat Sukar

92.9

72.0

248.0

63.3

82.0

90.8

18.0

87.5

74.0

7669.5

74.4

Poor

St.11

End Qalat Sukar

84.5

87.1

384.0

69.2

104.0

108.0

26.6

102.5

98.0

10117.3

98.1

Very Poor

St.12

Ent. Al-Rifai

94.8

70.5

276.0

62.2

76.0

82.0

6.1

80.0

78.0

8050.4

78.1

Very Poor

St.13

Mid. Al Rifai

90.6

84.7

304.0

64.1

98.2

116.0

23.2

100.0

100.0

10306.3

100.0

Very Poor

St.14

End Al-Rifai

92.9

74.5

268.0

64.5

89.6

99.6

18.6

83.0

100.0

10260.9

99.5

Very Poor

St.15

Ent. Al Naser

84.5

86.2

334.0

70.1

126.0

122.0

25.9

105.8

85.0

8828.0

85.6

Very Poor

St.16

Mid Al-Naser

91.8

81.5

284.0

65.4

123.4

114.0

19.5

102.5

114.0

11717.1

113.7

Unsuitable

St.17

End Al-Naser

86.9

84.5

292.0

69.4

137.4

126.0

25.1

145.0

97.0

10126.9

98.2

Very Poor

St.18

Ent. Al Shatrah

90.4

85.5

288.0

70.2

138.8

128.0

25.3

103.0

90.0

9322.6

90.4

Very Poor

St.19

Mid Al-Shatrah

89.2

81.5

284.0

63.8

132.4

115.2

20.1

95.5

115.0

11800.8

114.5

Unsuitable

St.20

End Al-Shatrah

84.1

87.1

352.0

71.3

143.6

133.6

31.0

121.5

131.0

13472.0

130.7

Unsuitable

Wi

0.1176

0.001

0.04

0.2

0.2

0.004

0.0222

2.5

100

$\sum \boldsymbol{W} \boldsymbol{i}=103.0848$

Table A5. Sensitivity of WQPs that were used to calculate AW-WQI for (April, 2025)

ID

Name of Station

QI

SUM WIQI

AW-WQI Value

Water Quality Rating

pH

TDS mg/l

TSS mg/l

DO mg/l

BOD5 mg/l

SO4 mg/l

NO3

PO4 mg/l

Pb+2 ppm

St.1

Ent. Kut

94.7

60.0

84.0

52.6

18.0

66.0

13.0

43.0

40.0

4136.7

40.1

Good

St.2

End Kut

84.9

65.0

104.0

62.3

62.0

102.0

17.7

59.3

75.0

7688.0

74.6

Poor

St.3

Ent. Al-Muwaffaqiya

94.9

62.5

100.0

55.1

40.0

67.2

13.7

44.5

48.0

4946.1

48.0

Good

St.4

End Al-Muwaffaqiya

84.0

79.5

104.0

71.0

63.6

104.0

20.1

66.5

77.0

7908.2

76.7

Very Poor

St.5

Ent. Al-Hayy

92.6

60.2

96.0

62.2

44.0

78.8

15.7

64.0

49.0

5096.7

49.4

Good

St.6

Mid Al-Hayy

84.4

85.5

272.0

70.4

73.4

102.0

22.5

102.0

100.0

10305.6

100.0

Very Poor

St.7

End Al-Hayy

93.6

71.3

152.0

62.9

60.0

80.0

16.5

56.0

97.0

9882.4

95.9

Very Poor

St.8

Ent. Al-Fajr

93.6

63.5

136.0

57.8

40.6

70.8

15.4

58.5

72.1

7393.1

71.7

Poor

St.9

End Al-Fajr

84.8

83.8

208.0

67.6

113.0

94.0

22.0

97.0

80.0

8297.9

80.5

Very Poor

St.10

Ent. Qalat Sukar

88.8

70.8

96.0

66.1

84.2

79.2

17.6

88.5

73.5

7616.4

73.9

Poor

St.11

End Qalat Sukar

83.3

85.7

148.0

70.2

119.2

100.8

25.8

10.3

85.0

8580.3

83.2

Very Poor

St.12

Ent. Al-Rifai

91.2

65.0

108.0

65.4

64.2

74.0

17.7

58.8

75.3

7718.6

74.9

Poor

St.13

Mid. Al Rifai

91.8

84.7

140.0

70.1

96.4

104.0

21.9

103.3

98.3

10138.8

98.4

Very Poor

St.14

End Al-Rifai

91.1

72.3

128.0

68.1

83.4

98.0

18.5

62.0

95.0

9702.0

94.1

Very Poor

St.15

Ent. Al Naser

83.3

83.2

124.0

69.2

80.6

102.0

23.9

102.3

80.0

8301.4

80.5

Very Poor

St.16

Mid Al-Naser

89.6

86.5

192.0

70.6

95.6

106.0

21.0

100.0

100.0

10302.4

99.9

Very Poor

St.17

End Al-Naser

86.5

84.3

184.0

71.3

102.4

102.0

31.9

119.0

95.0

9851.0

95.6

Very Poor

St.18

Ent. Al Shatrah

82.6

76.7

288.0

67.1

94.2

100.0

22.7

108.5

90.0

9325.7

90.5

Very Poor

St.19

Mid Al-Shatrah

87.1

87.6

324.0

71.0

104.2

104.0

20.8

103.0

100.0

10316.7

100.1

Unsuitable

St.20

End Al-Shatrah

82.6

84.6

300.0

72.8

136.8

102.0

29.2

108.5

110.0

11336.0

110.0

Unsuitable

Wi

0.1176

0.001

0.04

0.2

0.2

0.004

0.0222

2.5

100

$\sum \boldsymbol{W} \boldsymbol{i}=103.0848$

Table A6. Sensitivity of WQPs that were used to calculate AW-WQI for (May, 2025)

ID

Name of Station

QI

SUM WIQI

AW-WQI Value

Water Quality Rating

pH

TDS mg/l

TSS mg/l

DO mg/l

BOD5 mg/l

SO4 mg/l

NO3

PO4 mg/l

Pb+2 ppm

St.1

Ent. Kut

94.2

58.6

92.0

52.9

16.0

54.4

11.9

27.5

48.0

4897.8

47.5

Good

St.2

End Kut

88.7

62.7

104.0

62.6

60.0

98.0

17.7

68.3

80.0

8210.6

79.6

Very Poor

St.3

Ent. Al-Muwaffaqiya

93.5

58.5

96.0

57.1

32.0

70.8

13.3

62.0

62.0

6388.3

62.0

Poor

St.4

End Al-Muwaffaqiya

85.9

78.6

148.0

70.1

61.8

100.0

19.5

72.3

86.0

8823.9

85.6

Very Poor

St.5

Ent. Al-Hayy

91.8

57.9

100.0

59.1

43.4

80.0

15.4

56.0

60.0

6176.0

59.9

Poor

St.6

Mid Al-Hayy

83.3

88.8

128.0

71.3

64.0

102.0

21.0

100.0

97.0

9992.9

96.9

Very Poor

St.7

End Al-Hayy

92.4

72.5

132.0

64.3

69.0

96.0

16.1

78.0

88.0

9038.6

87.7

Very Poor

St.8

Ent. Al-Fajr

92.6

64.8

96.0

60.1

45.4

63.2

14.8

25.0

75.0

7599.0

73.7

Poor

St.9

End Al-Fajr

83.3

83.7

100.0

70.4

64.4

106.0

21.3

105.8

92.0

9506.1

92.2

Very Poor

St.10

Ent. Qalat Sukar

85.9

71.1

112.0

66.8

61.8

86.0

15.8

72.0

83.4

8561.1

83.0

Very Poor

St.11

End Qalat Sukar

83.3

88.9

108.0

71.3

112.8

106.0

24.8

102.0

93.9

9697.0

94.1

Very Poor

St.12

Ent. Al-Rifai

93.4

67.7

112.0

64.7

51.4

84.0

19.2

62.5

82.0

8395.8

81.4

Very Poor

St.13

Mid. Al Rifai

84.5

84.6

128.0

66.1

77.6

106.4

22.2

101.3

104.0

10697.9

103.8

Unsuitable

St.14

End Al-Rifai

91.9

72.8

108.0

69.4

62.8

78.8

17.7

77.8

100.0

10236.7

99.3

Very Poor

St.15

Ent. Al Naser

82.8

84.8

88.0

71.0

82.4

104.0

24.7

105.3

90.0

9308.1

90.3

Very Poor

St.16

Mid Al-Naser

90.8

81.0

120.0

70.2

61.8

102.0

18.3

96.3

127.0

12983.4

125.9

Unsuitable

St.17

End Al-Naser

81.2

86.8

316.0

79.5

140.4

106.0

34.0

108.8

120.0

12339.3

119.7

Unsuitable

St.18

Ent. Al Shatrah

84.5

80.0

264.0

70.4

108.0

104.0

23.5

76.0

98.0

10047.2

97.5

Very Poor

St.19

Mid Al-Shatrah

82.0

82.0

260.0

73.3

102.4

108.4

21.1

91.3

150.0

15284.3

148.3

Unsuitable

St.20

End Al-Shatrah

82.8

85.5

224.0

73.7

141.6

105.2

29.5

110.5

160.0

16339.2

158.5

Unsuitable

Wi

0.1176

0.001

0.04

0.2

0.2

0.004

0.0222

2.5

100

$\sum \boldsymbol{W} \boldsymbol{i}=103.0848$

Table A7. Sensitivity of WQPs that were used to calculate AW-WQI for (June, 2025)

ID

Name of Station

QI

SUM WIQI

AW-WQI Value

Water Quality Rating

pH

TDS mg/l

TSS mg/l

DO mg/l

BOD5 mg/l

SO4 mg/l

NO3

PO4 mg/l

Pb+2 ppm

St.1

Ent. Kut

96.5

51.2

144.0

70.9

53.4

57.6

10.1

44.5

60.0

6153.7

59.7

Poor

St.2

End Kut

95.9

62.2

216.0

94.7

102.0

91.6

15.2

55.8

93.0

9499.4

92.2

Very Poor

St.3

Ent. Al-Muwaffaqiya

96.5

46.9

92.0

74.3

44.0

66.4

8.7

120.5

72.0

7540.4

73.1

Poor

St.4

End Al-Muwaffaqiya

95.1

58.7

252.0

97.5

86.0

104.0

18.6

102.5

100.0

10315.1

100.1

Unsuitable

St.5

Ent. Al-Hayy

95.5

52.9

184.0

84.2

62.6

82.0

11.7

101.5

78.0

8102.3

78.6

Very Poor

St.6

Mid Al-Hayy

91.3

78.6

308.0

100.0

151.8

109.2

22.1

113.5

143.0

14658.2

142.2

Unsuitable

St.7

End Al-Hayy

95.4

58.7

224.0

82.8

79.6

86.0

13.8

67.8

138.0

14022.7

136.0

Unsuitable

St.8

Ent. Al-Fajr

96.2

50.4

204.0

80.0

58.2

87.2

11.6

104.3

85.0

8808.4

85.4

Very Poor

St.9

End Al-Fajr

94.6

64.2

284.0

99.2

145.0

109.6

21.9

112.0

150.0

15352.3

148.9

Unsuitable

St.10

Ent. Qalat Sukar

95.6

53.8

236.0

78.2

84.2

86.0

14.2

71.3

87.0

8932.0

86.6

Very Poor

St.11

End Qalat Sukar

91.8

63.9

360.0

105.9

162.0

116.4

24.6

123.8

137.0

14089.2

136.7

Unsuitable

St.12

Ent. Al-Rifai

95.3

58.0

260.0

96.2

103.6

84.0

12.8

86.5

96.0

9878.5

95.8

Very Poor

St.13

Mid. Al Rifai

94.8

62.5

288.0

98.8

130.8

118.8

20.0

105.3

120.0

12332.7

119.6

Unsuitable

St.14

End Al-Rifai

95.1

61.5

264.0

97.7

126.6

95.2

11.6

95.3

101.0

10405.4

100.9

Unsuitable

St.15

Ent. Al Naser

91.1

62.5

348.0

106.8

161.6

117.6

22.8

132.3

98.0

10210.0

99.0

Very Poor

St.16

Mid Al-Naser

83.5

67.5

276.0

98.4

106.4

98.0

15.6

89.8

164.0

16687.0

161.9

Unsuitable

St.17

End Al-Naser

86.4

71.2

424.0

138.9

182.0

137.6

33.6

171.3

130.0

13520.8

131.2

Unsuitable

St.18

Ent. Al Shatrah

88.8

61.1

228.0

119.0

122.4

109.6

22.5

121.5

80.0

8372.6

81.2

Very Poor

St.19

Mid Al-Shatrah

93.8

67.5

340.0

125.0

136.6

108.0

19.5

82.0

190.0

19282.9

187.1

Unsuitable

St.20

End Al-Shatrah

88.6

68.2

368.0

131.6

173.4

128.8

25.4

140.5

164.0

16838.5

163.3

Unsuitable

Wi

0.1176

0.001

0.04

0.2

0.2

0.004

0.0222

2.5

100

$\sum \boldsymbol{W} \boldsymbol{i}=103.0848$

Table A8. Sensitivity of WQPs that were used to calculate AW-WQI for (July, 2025)

ID

Name of Station

QI

SUM WIQI

AW-WQI Value

Water Quality Rating

pH

TDS mg/l

TSS mg/l

DO mg/l

BOD5 mg/l

SO4 mg/l

NO3

PO4 mg/l

Pb+2 ppm

St.1

Ent. Kut

96.5

48.5

104.0

71.3

42.0

44.8

7.2

38.8

68.0

6935.4

67.3

Poor

St.2

End Kut

95.1

55.5

192.0

94.3

65.6

76.8

14.3

73.3

99.0

10134.7

98.3

Very Poor

St.3

Ent. Al-Muwaffaqiya

95.5

48.8

136.0

81.2

41.6

54.0

8.9

63.8

73.0

7501.1

72.8

Poor

St.4

End Al-Muwaffaqiya

95.3

58.8

172.0

96.2

87.4

100.8

18.4

100.3

107.0

11006.3

106.8

Unsuitable

St.5

Ent. Al-Hayy

94.9

52.0

124.0

81.4

56.0

72.0

11.8

68.5

74.6

7675.5

74.5

Poor

St.6

Mid Al-Hayy

83.9

68.8

220.0

101.2

163.0

102.4

20.8

104.3

124.0

12733.1

123.5

Unsuitable

St.7

End Al-Hayy

95.2

49.7

136.0

82.8

64.0

78.0

12.2

96.3

120.0

12287.2

119.2

Unsuitable

St.8

Ent. Al-Fajr

95.5

49.1

172.0

80.0

46.4

79.6

10.2

76.0

87.0

8934.0

86.7

Very Poor

St.9

End Al-Fajr

88.7

58.8

228.0

98.0

142.8

106.0

20.7

105.3

135.0

13831.8

134.2

Unsuitable

St.10

Ent. Qalat Sukar

94.9

48.9

144.0

81.4

84.2

74.0

11.1

74.8

95.0

9737.5

94.5

Very Poor

St.11

End Qalat Sukar

84.7

61.5

272.0

98.0

153.0

101.6

22.4

123.0

156.0

15979.5

155.0

Unsuitable

St.12

Ent. Al-Rifai

94.6

56.5

168.0

94.0

102.2

75.2

11.1

103.0

99.0

10215.2

99.1

Very Poor

St.13

Mid. Al Rifai

94.0

61.2

252.0

98.0

124.4

105.2

19.4

108.0

175.0

17836.5

173.0

Unsuitable

St.14

End Al-Rifai

94.8

55.0

208.0

96.2

103.6

96.0

11.6

99.3

187.0

19008.2

184.4

Unsuitable

St.15

Ent. Al Naser

85.6

64.9

220.0

101.0

150.4

116.0

22.4

121.8

110.0

11374.6

110.3

Unsuitable

St.16

Mid Al-Naser

91.4

57.9

276.0

102.0

153.4

107.2

16.0

91.3

241.0

24401.8

236.7

Unsuitable

St.17

End Al-Naser

83.3

64.0

280.0

131.9

182.4

128.4

23.2

155.3

207.0

21173.1

205.4

Unsuitable

St.18

Ent. Al Shatrah

88.8

57.1

220.0

104.2

122.0

109.6

19.3

102.8

169.0

17222.3

167.1

Unsuitable

St.19

Mid Al-Shatrah

90.8

57.8

268.0

125.0

144.0

113.2

19.1

113.0

256.0

25958.6

251.8

Unsuitable

St.20

End Al-Shatrah

85.2

62.0

236.0

128.2

177.0

124.0

22.2

121.3

232.0

23584.7

228.8

Unsuitable

Wi

0.1176

0.001

0.04

0.2

0.2

0.004

0.0222

2.5

100

$\sum \boldsymbol{W} \boldsymbol{i}=103.0848$

Table A9. Sensitivity of WQPs that were used to calculate AW-WQI for August, 2025

ID

Name of Station

QI

SUM WIQI

AW-WQI Value

Water Quality Rating

pH

TDS mg/l

TSS mg/l

DO mg/l

BOD5 mg/l

SO4 mg/l

NO3

PO4 mg/l

Pb+2 ppm

St.1

Ent. Kut

96.2

45.8

88.0

69.9

44.2

51.6

6.9

29.3

90.0

9111.2

88.4

Very Poor

St.2

End Kut

94.4

55.7

144.0

92.1

64.0

84.0

14.6

61.5

110.0

11202.5

108.7

Unsuitable

St.3

Ent. Al-Muwaffaqiya

95.1

46.9

100.0

79.0

40.0

58.4

8.7

113.0

95.0

9822.0

95.3

Very Poor

St.4

End Al-Muwaffaqiya

94.6

56.6

152.0

98.0

84.0

102.0

18.0

101.3

120.0

12307.6

119.4

Unsuitable

St.5

Ent. Al-Hayy

93.6

49.4

108.0

80.1

60.0

75.2

10.6

104.5

100.0

10305.2

100.0

Very Poor

St.6

Mid Al-Hayy

89.1

67.6

192.0

104.2

101.6

104.0

21.9

102.0

188.0

19115.3

185.4

Unsuitable

St.7

End Al-Hayy

94.8

62.0

128.0

87.1

71.6

71.6

13.6

72.3

191.0

19329.3

187.5

Unsuitable

St.8

Ent. Al-Fajr

95.1

49.1

104.0

80.9

55.2

58.4

11.6

42.3

124.0

12548.7

121.7

Unsuitable

St.9

End Al-Fajr

87.6

55.4

132.0

97.1

143.6

101.6

20.8

103.0

195.0

19822.1

192.3

Unsuitable

St.10

Ent. Qalat Sukar

92.1

52.0

152.0

77.6

62.0

85.6

14.1

81.8

150.0

15249.9

147.9

Unsuitable

St.11

End Qalat Sukar

87.5

66.4

236.0

102.5

149.8

106.0

21.2

106.3

207.0

21036.8

204.1

Unsuitable

St.12

Ent. Al-Rifai

92.9

55.4

116.0

97.5

77.4

66.0

13.3

86.0

177.0

17966.2

174.3

Unsuitable

St.13

Mid. Al Rifai

92.8

62.2

148.0

105.3

146.0

102.0

21.2

103.8

245.0

24827.4

240.8

Unsuitable

St.14

End Al-Rifai

93.5

66.3

136.0

102.0

126.0

98.0

13.7

77.8

267.0

26957.2

261.5

Unsuitable

St.15

Ent. Al Naser

85.8

63.5

204.0

98.4

146.4

102.4

21.7

111.8

194.0

19747.5

191.6

Unsuitable

St.16

Mid Al-Naser

89.5

68.8

208.0

98.6

102.0

100.4

16.6

85.5

327.0

32973.6

319.9

Unsuitable

St.17

End Al-Naser

84.2

72.8

260.0

111.1

182.0

130.4

27.6

132.5

340.0

34411.4

333.8

Unsuitable

St.18

Ent. Al Shatrah

91.6

61.8

152.0

113.6

122.0

103.6

21.8

95.8

221.0

22404.3

217.3

Unsuitable

St.19

Mid Al-Shatrah

89.5

59.8

128.0

98.0

122.6

100.4

20.4

92.8

279.0

28192.6

273.5

Unsuitable

St.20

End Al-Shatrah

83.3

62.2

256.0

102.5

182.8

130.0

23.6

113.0

324.0

32760.7

317.8

Unsuitable

Wi

0.1176

0.001

0.04

0.2

0.2

0.004

0.0222

2.5

100

$\sum \boldsymbol{W} \boldsymbol{i}=103.0848$

Table A10. Sensitivity of WQPs that used to calculate AW-WQI for (September, 2025)

ID

Name of Station

QI

SUM WIQI

AW-WQI Value

Water Quality Rating

pH

TDS mg/l

TSS mg/l

DO mg/l

BOD5 mg/l

SO4 mg/l

NO3

PO4 mg/l

Pb+2 ppm

St.1

Ent. Kut

84.8

83.4

264.0

46.4

48.6

108.0

18.7

63.5

87.0

8899.2

86.3

Very Poor

St.2

End Kut

83.8

96.5

388.0

53.6

76.2

152.8

30.3

105.8

145.0

14817.1

143.7

Unsuitable

St.3

Ent. Al-Muwaffaqiya

85.4

83.6

308.0

47.4

62.0

108.8

20.3

116.3

95.0

9835.8

95.4

Very Poor

St.4

End Al-Muwaffaqiya

83.3

98.8

580.0

55.5

90.2

159.6

34.4

119.8

161.0

16463.0

159.7

Unsuitable

St.5

Ent. Al-Hayy

84.2

86.0

300.0

49.5

84.4

114.0

22.0

103.0

97.0

10007.2

97.1

Very Poor

St.6

Mid Al-Hayy

82.8

100.8

700.0

65.3

164.6

170.8

41.0

180.8

192.0

19737.3

191.5

Unsuitable

St.7

End Al-Hayy

84.7

92.3

372.0

59.2

95.8

124.0

23.3

123.0

199.0

20264.4

196.6

Unsuitable

St.8

Ent. Al-Fajr

84.4

85.9

312.0

50.3

73.6

116.4

21.6

110.3

99.0

10223.8

99.2

Very Poor

St.9

End Al-Fajr

82.7

100.3

624.0

60.6

150.2

172.4

40.7

177.8

205.0

21022.9

203.9

Unsuitable

St.10

Ent. Qalat Sukar

83.6

88.9

444.0

52.4

97.0

138.0

30.7

99.3

147.3

15036.9

145.9

Unsuitable

St.11

End Qalat Sukar

82.5

102.1

712.0

63.4

164.6

174.4

45.6

181.3

164.9

17028.7

165.2

Unsuitable

St.12

Ent. Al-Rifai

84.2

89.1

380.0

53.9

108.2

144.8

26.0

112.8

158.0

16140.7

156.6

Unsuitable

St.13

Mid. Al Rifai

82.9

98.0

572.0

62.4

156.8

167.6

40.2

158.0

210.0

21473.1

208.3

Unsuitable

St.14

End Al-Rifai

83.6

96.5

376.0

58.5

117.0

154.4

27.1

109.5

258.0

26135.0

253.5

Unsuitable

St.15

Ent. Al Naser

81.6

98.7

644.0

61.1

162.0

176.8

50.0

196.0

192.0

19771.9

191.8

Unsuitable

St.16

Mid Al-Naser

81.5

101.8

508.0

66.7

164.8

164.0

45.0

135.3

284.0

28816.1

279.5

Unsuitable

St.17

End Al-Naser

76.6

106.8

820.0

72.6

184.4

191.6

77.8

243.5

328.0

33504.6

325.0

Unsuitable

St.18

Ent. Al Shatrah

82.5

92.0

500.0

63.9

137.8

157.6

46.9

193.0

200.0

20554.3

199.4

Unsuitable

St.19

Mid Al-Shatrah

79.8

103.3

624.0

70.4

179.0

184.8

61.8

203.8

309.0

31495.8

305.5

Unsuitable

St.20

End Al-Shatrah

76.6

106.2

692.0

72.5

178.0

184.8

62.4

208.3

332.0

33809.6

328.0

Unsuitable

Wi

0.1176

0.001

0.04

0.2

0.2

0.004

0.0222

2.5

100

$\sum \boldsymbol{W} \boldsymbol{i}=103.0848$

Table A11. Sensitivity of WQPs that used to calculate AW-WQI for (October, 2025)

ID

Name of Station

QI

SUM WIQI

AW-WQI Value

Water Quality Rating

pH

TDS mg/l

TSS mg/l

DO mg/l

BOD5 mg/l

SO4 mg/l

NO3

PO4 mg/l

Pb+2 ppm

St.1

Ent. Kut

83.9

77.8

84.0

49.5

45.4

102.0

16.9

57.5

70.0

7176.8

69.6

Poor

St.2

End Kut

82.5

96.5

260.0

56.8

84.0

142.0

31.1

105.3

120.0

12312.7

119.4

Unsuitable

St.3

Ent. Al-Muwaffaqiya

83.8

85.5

216.0

49.5

50.4

100.0

20.0

65.3

78.0

8002.5

77.6

Very Poor

St.4

End Al-Muwaffaqiya

82.4

97.7

288.0

61.4

103.2

158.4

34.4

117.3

132.0

13548.8

131.4

Unsuitable

St.5

Ent. Al-Hayy

83.3

86.2

232.0

49.5

50.8

100.0

22.7

102.5

84.9

8786.4

85.2

Very Poor

St.6

Mid Al-Hayy

81.2

100.7

628.0

61.7

130.8

158.4

40.2

100.0

148.0

15124.8

146.7

Unsuitable

St.7

End Al-Hayy

82.7

91.0

216.0

55.6

84.6

102.0

27.3

94.3

163.0

16583.1

160.9

Unsuitable

St.8

Ent. Al-Fajr

83.1

86.2

232.0

51.9

65.0

102.4

22.4

105.5

88.7

9177.2

89.0

Very Poor

St.9

End Al-Fajr

82.4

99.0

468.0

59.4

162.0

188.8

42.2

196.0

175.0

18064.5

175.2

Unsuitable

St.10

Ent. Qalat Sukar

83.1

87.7

292.0

56.7

84.0

128.8

31.3

98.0

95.0

9795.9

95.0

Very Poor

St.11

End Qalat Sukar

78.8

105.0

528.0

62.7

169.0

164.8

48.9

108.3

185.0

18849.2

182.9

Unsuitable

St.12

Ent. Al-Rifai

82.4

89.4

256.0

56.7

116.8

136.8

26.3

108.8

98.2

10147.7

98.4

Very Poor

St.13

Mid. Al Rifai

81.4

95.0

380.0

70.2

162.0

168.0

40.4

154.5

198.0

20259.1

196.5

Unsuitable

St.14

End Al-Rifai

83.5

94.6

308.0

58.8

102.2

142.0

26.7

104.0

230.0

23315.6

226.2

Unsuitable

St.15

Ent. Al Naser

78.8

97.1

672.0

62.7

154.4

158.0

45.6

152.5

98.0

10262.6

99.6

Very Poor

St.16

Mid Al-Naser

83.1

101.1

576.0

64.1

162.4

172.8

46.7

145.8

298.0

30244.3

293.4

Unsuitable

St.17

End Al-Naser

76.5

106.3

712.0

76.5

182.0

188.4

64.4

246.3

310.0

31707.1

307.6

Unsuitable

St.18

Ent. Al Shatrah

82.8

95.8

408.0

62.4

132.2

146.0

41.1

130.5

255.9

25982.8

252.1

Unsuitable

St.19

Mid Al-Shatrah

77.6

104.8

648.0

69.4

173.0

149.2

43.3

162.0

290.0

29490.2

286.1

Unsuitable

St.20

End Al-Shatrah

76.7

105.0

508.0

71.3

175.0

168.0

53.3

203.0

309.0

31488.1

305.5

Unsuitable

Wi

0.1176

0.001

0.04

0.2

0.2

0.004

0.0222

2.5

100

$\sum \boldsymbol{W} \boldsymbol{i}=103.0848$

Table A12. Sensitivity of WQPs that used to calculate AW-WQI for November 2025

ID

Name of Station

QI

SUM WIQI

AW-WQI Value

Water Quality Rating

pH

TDS mg/l

TSS mg/l

DO mg/l

BOD5 mg/l

SO4 mg/l

NO3

PO4 mg/l

Pb+2 ppm

St.1

Ent. Kut

83.9

77.8

84.0

49.5

45.4

102.0

16.9

57.5

77.0

7876.8

76.4

Very Poor

St.2

End Kut

82.5

96.5

260.0

56.8

84.0

142.0

31.1

105.3

130.0

13312.7

129.1

Unsuitable

St.3

Ent. Al-Muwaffaqiya

83.8

85.5

216.0

49.5

50.4

100.0

20.0

65.3

88.0

9002.5

87.3

Very Poor

St.4

End Al-Muwaffaqiya

82.4

97.7

288.0

61.4

103.2

158.4

34.4

117.3

150.0

15348.8

148.9

Unsuitable

St.5

Ent. Al-Hayy

83.3

86.2

232.0

49.5

50.8

100.0

22.7

102.5

88.0

9096.4

88.2

Very Poor

St.6

Mid Al-Hayy

81.2

100.7

628.0

61.7

130.8

158.4

40.2

100.0

188.0

19124.8

185.5

Unsuitable

St.7

End Al-Hayy

82.7

91.0

216.0

55.6

84.6

102.0

27.3

94.3

163.0

16583.1

160.9

Unsuitable

St.8

Ent. Al-Fajr

83.1

86.2

232.0

51.9

65.0

102.4

22.4

105.5

88.7

9177.2

89.0

Very Poor

St.9

End Al-Fajr

82.4

99.0

468.0

59.4

162.0

188.8

42.2

196.0

175.0

18064.5

175.2

Unsuitable

St.10

Ent. Qalat Sukar

83.1

87.7

292.0

56.7

84.0

128.8

31.3

98.0

95.0

9795.9

95.0

Very Poor

St.11

End Qalat Sukar

78.8

105.0

528.0

62.7

169.0

164.8

48.9

108.3

185.0

18849.2

182.9

Unsuitable

St.12

Ent. Al-Rifai

82.4

89.4

256.0

56.7

116.8

136.8

26.3

108.8

98.9

10217.7

99.1

Very Poor

St.13

Mid. Al Rifai

81.4

95.0

380.0

70.2

162.0

168.0

40.4

154.5

198.0

20259.1

196.5

Unsuitable

St.14

End Al-Rifai

83.5

94.6

308.0

58.8

102.2

142.0

26.7

104.0

230.0

23315.6

226.2

Unsuitable

St.15

Ent. Al Naser

78.8

97.1

672.0

62.7

154.4

158.0

45.6

152.5

100.0

10462.6

101.5

Unsuitable

St.16

Mid Al-Naser

83.1

101.1

576.0

64.1

162.4

172.8

46.7

145.8

344.0

34844.3

338.0

Unsuitable

St.17

End Al-Naser

76.5

106.3

712.0

76.5

182.0

188.4

64.4

246.3

310.0

31707.1

307.6

Unsuitable

St.18

Ent. Al Shatrah

82.8

95.8

408.0

62.4

132.2

146.0

41.1

130.5

267.9

27182.8

263.7

Unsuitable

St.19

Mid Al-Shatrah

77.6

104.8

648.0

69.4

173.0

149.2

43.3

162.0

290.0

29490.2

286.1

Unsuitable

St.20

End Al-Shatrah

76.7

105.0

508.0

71.3

175.0

168.0

53.3

203.0

323.0

32888.1

319.0

Unsuitable

Wi

0.1176

0.001

0.04

0.2

0.2

0.004

0.0222

2.5

100

$\sum \boldsymbol{W} \boldsymbol{i}=103.0848$

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