پیامدهای تغییر اقلیم بر پوشش گیاهی در منطقه نیمروز سیستان

Lack of water and occurrence of numerous droughts is one of the challenges of dry areas, which plays a big role in the lack of development of these areas. Nimroz region of Sistan is one of these areas that has low rainfall and its water is dependent on Afghanistan. In addition, due to the climate change in the last two decades, it has been accompanied by numerous droughts, which has played a major role in reducing its vegetation. The purpose of this research is to monitor the state of vegetation in Nimroz region of Sistan during drought and wet years. To carry out this research, satellite images with high spatial and temporal resolution were prepared with the help of Landsat and MODIS satellite images. Then, using the ESTARFM model, images related to water shortage and water scarcity years were simulated. The results showed that during the water shortage, 138,176.3 hectares of the studied land in this area had less than 10% vegetation cover. But in normal years and the presence of water in these areas, the area of poor vegetation in this area has decreased to 50559.7 hectares, but the area of vegetation has increased with greater density. Therefore, it can be concluded that climate change has played a big role in the reduction of vegetation in the region, but the improvement of hydrological conditions and the flow of water to Sistan play an effective role in revitalizing the vegetation of the region.