Assessment of Groundwater for Irrigation Using (IWQI)Model, Located in Al-Nimrud Region at Southeastern ofMosul City, Iraq

The study aimed to understand the quality of groundwater inAl-Nimrud region south-eastern partof Mosul city, Iraq.Groundwater samples from 10 wells were collected during the dryseasonandanalyzed for their physical and chemical properties using standard laboratory methods. From theanalyzed data, some parameters like sodium adsorption ratio (SAR), sodium percentage (Na%),potenial salinity (PS), residual sodium carbonate (RSC), magnesium adsorption ratio (MAR),permeability index (PI) and Kellys ratio (KR) were calculated for each water sample to know theirrigational fitness and irrigationwater quality index (WQI) was applied to the analytical results ofthe parameters to obtain a single value that was used to rank the groundwater at each well foragricultural uses. The results showed a high levels of salts for most of the water samples studied,where the average values of EC ranged between (1.64 to 5.069) dS.m-1. Also, the estimatedparameters such as Na%, SAR, PI, KRwere within the appropriate levels for irrigation, while thevalues of MAR, PSfor most of the samples were within the inappropriate limits for irrigation.Also, theresults of the WQIvalues showed that the groundwater quality falls between thecategory of severe to low restrictions, therefore the use of most of the water for irrigation in thestudy area is likely to lead to the problem of salinity in soils with heavy texture.