Determining Irrigation Water Quality Index for Evaluation Groundwater Quality of Green- Belt Zone, Karbala, Iraq

It is recognized that the quality of groundwater is just as important as its quantity. As a resource,groundwater is gaining increasing importance in the supply of water in the studied area wheresurface water is scare or absent. One of the purposes of this study is include: providing anoverview of the present groundwater quality, determining the spatial distribution of groundwaterquality parameters by using kriging interpolation method, and providing a combination of waterquality parameters to form the so-called irrigation water quality index (IWQI) which is atechnique that could be used to classify irrigation water. For this purpose the major and minorelements of water samples which were collected from 24 wells of Green-Belt project in threeperiods (September, November 2012, and February 2013) have been analyzed. The results ofanalysis indicate that the groundwater should be used only with the soil of high permeability andwith some constraints in the use of irrigation method and selection plant with high bearing to highproportion of salt content (high EC) and high Chloride concentration.

کلیدواژه ها:

IWQI ، groundwater ، quality ، spatial distribution