Evaluating the water quality in the agriculture part of the Hamoun Hirmand basin

Abstract

Awareness from quality and quantity of the water resources is one of the important neediness in planning and developing the water resources and protecting and controlling of them. It is obvious that for awareness from the quality of the water resources and producing the needed information the monitoring should be done. The primary estimations of the quality of the agriculture were done in the standard Wilcox diagram with considering the values of the SAR and EC and it was specified that the water of this basin in the agriculture part is set in three categories of the very brine, slightly brine and brine that respectively they are inappropriate for agriculture, usable for agriculture and appropriate for agriculture, among this the share of the very brine waters is more than other waters. Among studied stations the stations of choto, shileh and Lar have water with the very brine quality and they are inappropriate for agriculture that respectively are placed in the qualitative classes of C4-S3, C4-S4 and C4-S3 that qualitatively they are in the lowest possible level. Results of evaluating the two stations of Gourband and Shirdel showed the better quality of these two regions than other parts in the form that the water of these two stations have recognized as the appropriate waters for agriculture and qualitative classes of these two stations respectively were C2-S1 and C3-S1. Also it was specified from zoning the agriculture water that the agriculture water in the studied basin has been placed in the 2 classes of medium and inappropriate