Effects of human activities and climate variability on water resources in the Saveh plain, Iran

摘要: Quantity and quality distribution of surface water groundwater are changing under the impacts both climate variability human activities. The main goal this paper is to evaluate abovementioned on resources in Saveh plain, central Iran. To achieve aim, spatial temporal changes quantity have been analyzed, using hydrometric meteorological data. nonparametric Mann-Kendall test was used identify trends change points annual rainfall runoff for period 1946 2011. In order analyze Dam runoff, dam operation year, 1994, considered as a point. results show that time series divided into two parts, namely, 1966-1989 1990-2007, averages five stations increase from 10 21 %. Also, 1946-1995 1996-2007 four decrease 8 83 Results Shahabasi, Razin, Jalayer, Emamabad, Ahmadabad increased 9 33 % before after 1994. Nevertheless, decreased 24 81 indicate greatest lack between at Shahabasi station one important reason severe Highest level decline, about 168.67 cm, occurred 1994 year Dam. Trend analysis electrical conductivity 957.34 μmho/cm Wilcox classification method has reduced C3-S1 C4-S2. Average (EC) during 1999-2003 2004-2009 89.6 μmho/cm. indices agricultural usages classified classes including, C4-S2 16, C4-S1 46, 30, C2-S1 total aquifer area. conclusion, sustainable development, effects projects environment need be predicted very carefully.