Abstract
Abstract: Balance management and the health improvement of the limited groundwater resources are unavoidable to prevent of water scarcity. The irrigation drainable water is the main factors of groundwater contamination that depended on leaching amount, type of surface contaminants and used fertilizer provided the different levels of pollution. In this research, the effect of deep percolation amount on nitrate concentration and salinity in Shahrekord plain is analyzed. The sensitivity of chemical parameters such as Ca, SO4, Cl, Na, K, HCO3 relative to season variation, also nitrate distribution in 80 to 86 years are investigated. For this subject, 10 agricultural areas were identified and estimated their discharge volume and deep percolation. The result show that the groundwater nitrate concentration in the summer season is depended on depletion volume from the effective limitation with R-squared value equal to 0.9, except two cases that NO3 is under the wastewater effect. Na, K and HCO3 in the winter season have a significant difference rather than summer. Also nitrate mapping indicated that the considerable part of groundwater nitrate is happen by leaching in the agricultural lands.
Highlights
Limited water resources can be allocated for urban, industrial and agricultural consumption considering the required quality in accordance with the type of consumptions
The irrigation drainable water is the main factors of groundwater contamination that depended on leaching amount, type of surface contaminants and used fertilizer provided the different levels of pollution
The result show that the groundwater nitrate concentration in the summer season is depended on depletion volume from the effective limitation with R-squared value equal to 0.9, except two cases that NO3 is under the wastewater effect
Summary
Limited water resources can be allocated for urban, industrial and agricultural consumption considering the required quality in accordance with the type of consumptions. With the advent of extensive industrial activities and the use of fertilizers in agriculture, the most important source of human life is endangered. Electrical conductivity and concentration of sodium, chlorine, sulfate and nitrate ions in groundwater due to insoluble minerals and human activities such as intensive agricultural operations (application of chemical fertilizers), toxic effluents from industries or wastewater sources (Jalali, 2007). The effect of using treated wastewater in irrigation of agricultural lands of Isfahan Borkhar plain on the concentration of chemical parameters of well water such as PH, EC, chlorine, bicarbonate, calcium and magnesium, sodium, sulfate, nitrate. Tabatabaei and Lalehzari (2013) located the occurrence of chemical contaminants using the interpolation method He has introduced the entry of agricultural effluents and municipal sewage as the cause of pollution of Shahrekord alluvial aquifer
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