Investigation on Impacts of Dought on Landuse/Landcover(LU/LC) and Groundwater Level Changes in Razan-Ghahavand Plain

Droughts affects on agriculture and water consumption management through LU/LC and water resources changes in western mountainous areas of Iran. The aim of this study was to investigate terrestrial and remote sensing drought indices and their effects on LU/LC and ground water level in Razan-Ghahavand watershed. Precipitation trend in two stations and water level trend in six piezometric well were studied using Man Kendaland modified Man Kendal and also SPI and SWI drought indices were computed in month, season and year scale during 71-94. LU/LC changes and relationship among SPI, SWI, VCI and TCI drought indices were computed during 2008-2013(two main drought year). The results showed that water level drop(more than 10m) was relate to SPI index with two-year delay significantly. There is a significant correlation with SPI index for VCI index than TCI index and season scale than month and year scales. The finding indicted that agriculture area, gardens and rangelands were decreased 10.96 percent, 13.57 percent and 0.23 percent respectively and also, salin lands was increased 9.51percent during the 2008-2013.