Tarbiat Modares University (TMU) ECOPERSIA 2322-2700 4 4 2016 12 01 Effect of Drought on Qualitative and Quantitative Parameters of Zahedan Plain Aquifer 1541 1554 17185 EN Masome Sarhadi Former Master Student, Department of Rangeland and Watershed Management, University of Zabol, Zabol, Iran Mohammad Nohtani Assistant Professor, Department of Rangeland and Watershed Management, Faculty of Water and Soil, University of Zabol, Zabol, Iran Mohammad Reiki Former Master Student, Department of Rangeland and Watershed Management, University of Zabol, Capacity Building for the International Project of MENARID in Sistan and Baluchistan Province, Iran Journal Article <span>The </span><span>effect of drought indices</span><span> on hydrostatic variations and qualitative parameters of the Zahedan Plain's aquifer was investigated. For this purpose, 12-year statistics from observational and piezometry wells in the plain, the drought index of p</span><span>ercentage normal <span dir="rtl">)</span><span>PN), standardized precipitation index <span dir="rtl">)</span>SPI<span dir="rtl">(</span>, and 30-year precipitation statistics of Zahedan station were used. Results revealed that the PN index had a greater variety than SPI. The aquifer hydrograph showed a rise of 1.37 m in water level from the year 2002-2003 to 2013-2014. Considering the drought conditions in the plain, this rise in the water level can be attributed to the reduced water extraction from the aquifer, because the water requirement of Zahedan city was supplied from other sources, viz. Chah-nimehs. Also, there was a significant correlation between the parameters of anion, TDS, and Na⁺ with SPI. However, PN index did not have any significant relationship with the quality parameters. There was a significant correlation between water level balance and SPI only at the level of 1%</span><span>.</span> https://ecopersia.modares.ac.ir/article_17185_b0b9da81cf357c8884a06de8ef72bea0.pdf