Document Type : Original Article
Authors
1
Ph.D. student in Remote Sensing, Center for Remote Sensing and GIS research, Shahid Beheshti University, Tehran 1983969411, Iran
2
M.Sc. in Remote Sensing and GIS, Yazd University, Yazd, Iran
3
Assistant Professor of Rural Planning,, Yazd University, Yazd, Iran
4
Assistant Professor of Climatology,, Yazd University, Yazd, Iran
10.30488/ccr.2024.425449.1175
Abstract
Monitoring of water changes in human settlements and especially in rural areas is vital because of its importance and vital role in sustainability as well as its effect on the natural environment of the village. The current research has investigated the effect of the drying of the Zayandehroud River on the Land Surface Temperature (LST) and vegetation in the years 1990 to 2023 using Landsat-5 and Landsat-8 multispectral and thermal images. For this purpose, two indices of the Normalized Difference Water Index (NDWI) and Normalized Difference Vegetation Index (NDVI), together with LST, and Hot Spot were used, and their changes in three levels of the river, one kilometer of the river and rural settlements were investigated. Based on the results, the years 2000 and 2008 were identified as the years in which the river flow was drier than the other years, and the years 1990, 2013, 2018, 2022 and 2023 were identified as the years with more water flow. The results showed that in dry years, NDWI and NDVI values tended to have small positive values and in wet years tended to have smaller negative values. Also, dry years had higher LST and occupied a larger area of warm temperature classes. Dry years also had more hot spots than cold spots compared to wet years. The results of the correlation between parameters also showed a negative relationship between LST and NDVI and NDWI in all years and a positive relationship between NDVI and NDWI in drier years. Also, the correlation of the distance from the river was only significant in 1990 with positive LST and negative with NDWI and below 100 meters. The results of the present study are useful for the planning and proper management of water resources and rivers in the country.
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