Extraction of surface water zones of seasonal lake Jazmourian using remote sensing indicators.

Water resources are one of the most important components of land life and sustainable development. In the present study, the study of time series changes in the area of ​​Jazmourian Playa water areas, using the surface reflection data of Landsat 8 satellite from 2013 to 2019, was considered and the Modified Normalized Water Difference Index (MNDWI) was used to separate the water areas on the images. Then the trend of changes in the area of ​​water areas was estimated. All of these processes and satellite image analysis were performed in the Google Earth Engine software environment, which is a web and open source system for performing spectral and radiometric analyzes on satellite images. ArcGIS 10.5 software was also used to prepare spatial maps. . Findings showed that the area of ​​the seasonal lake of Jazmourian Lake is estimated to be 21426 Km based on MNDWI index, approximately 1515 Km based on automatic water extraction index (AWEI) and 1610 Km2 based on water absorption ratio (WRI) index. On the other hand, the analysis of surface water production of Landsat images showed that the highest rate of change was related to temporary seasonal and new seasonal water zones, so that changes in temporary seasonal zones occupied an area of ​​about 11245 km2 and new seasonal surface zones about 35355 km2. Is. Jazmourian plain water intake is related to the occurrence of seasonal floods and increased rainfall in the basin, so that a high correlation (R2 = 0.89) between the annual rainfall of the basin and the increase in the area of ​​water areas resulting from the MNDWI index has been observed.