Qualitative and Quantitative Assessment of Groundwater Resources for Irrigation Systems

Management of water resources for optimum usage is one of the most important issues of sustainable development. In this research, Southern and Southeast Plains of Fars Province was selected to consider the trend of qualitative and quantitative of groundwater. 83 wells in Farashband, GhiroKarzin, Khonj, Lar, Lamerd and Mohr were selected and the raining status in the statistical period of 30 years and also the trend of qualitative and quantitative ground water in the period of 2006 to 2010 was investigated using qualitative indicators.The results showed that, generally, it has caused to increase the concentration of sulfate, pH, sodium absorption ratio (SAR) and chloride and this shows the effect of drought on water quality. Also, analyzing the quality of ground water resources for irrigation systems. The results shows the reduction both of rainfall and excessive offtake of groundwater and groundwater levels particularly in recent year’s water quality status in this area has also decreased. So based on the water classification, selected plains water is not suitable for irrigation. Lar, Lamerd, Khonj and Mohr plains are in the critical conditions and management strategies are recommended for the irrigation systems.