Abstract
Water Quality Index (WQI) as a tool to assess the water quality status provides advice related to the use of water quality monitoring data and it is a way for combining the complex water quality data into a single value or single statement.The present study was conducted on Al- Hilla river in the middle of Iraq from August 2012 to July 2013 at five selected stations in the river, from Al- Musaib city to Al- Hashimya at the south of Hilla to determine its suitability for aquatic environment (GWQI), drinking water (PWSI) and irrigation (IWQI).This index offers a useful representation of the overall quality of water for public or any intended use as well as indicating pollution, water quality management, and decision making. According to the obtained results, it can be concluded that the EC, TSS, Total hardness, Ca, Mg, DO, BOD5, and NO3 moved away from the desired standards when the temperature rises. The variable of value of this index may be due to increasing the ration of organic matters and converting the carbonate to bicarbonate. The results recorded high value of calcium and magnesium more than the standard value of WHO and IQS (50 mg/l and high value of total hardness more than 500 mg/l). Irrigation water quality index (IWQI) in the study sites were ranged between 66-83 ranged between fair and good.
Highlights
A water quality Index is a good statistical tool for assessment, simplifying and reporting complex information obtained from any aquatic system(1).It is difficult to evaluate water quality from a large number of samples (2,3)
The present paper was the CCME Water Quality Index (WQI) to assess of water quality in Hilla River, middle of Iraq for aquatic environment (GWQI), drinking water (PWSI), and irrigation (IWQI) to fill the gap of information on water quality of the river area
Water samples were collected in polyethylene bottles from five sites from August 2012 to July 2013. -Water Quality Parameters: A total of 16 parameters were detected in this study, all the following parameter were considered in calculating the WQI{air and water temperature, pH, EC,TDS,TSS, water current velocity, dissolved oxygen, BOD5, total alkalinity according to(17); total hardness, calcium, magnesium (18); salinity(19); Nitrite, Nitrate(20) (Parson et al, 1984), and reactive phosphorous (21)
Summary
A water quality Index is a good statistical tool for assessment, simplifying and reporting complex information obtained from any aquatic system(1).It is difficult to evaluate water quality from a large number of samples (2,3). Introduction: A water quality Index is a good statistical tool for assessment, simplifying and reporting complex information obtained from any aquatic system(1). Some studies used the WQI to assess of water quality in Iraq(12,13,14,15).
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