Comparison and analysis of drought monitoring remote sensing indexes in the desert oasis area

doi:10.14088/j.cnki.issn0439-8114.2022.05.032

Abstract

Abstract: Oasis agriculture is of great significance in the process of economic and social development of Southern Xinjiang. Timely acquisition of soil relative humidity data in desert oasis areas is crucial for rational allocation of limited water resources and promotion of healthy and sustainable development of oasis agriculture and ecological environment. How to correctly select an appropriate drought monitoring remote sensing index is a problem for monitoring drought. The effectiveness of NDWI, VSWI, TVDI and MEI in desert oasis areas was compared and analyzed based on Landsat 8 and measured soil relative humidity data. The results showed that the four indices were not effective in agricultural areas （cotton and date fields） due to various factors such as human activities;All four indices reflect the spatial characteristics of the relative humidity of desert soils in the study area, with the optimal monitoring depth ranging from 0 to 10 cm;From the correlation coefficient analysis, the monitoring effect of NDWI and MEI were better than VSWI and TVDI. The relative humidity of the desert soil was higher along the banks of the Tarim river and around the farmland due to water distribution and human activities.

Key words: desert oasis area, drought monitoring remote sensing indexes, spatial characteristics, coefficients

CLC Number:

S127

YUE Sheng-ru, XU Zhen-xin, YANG Ming-hao, PENG Hai-feng, MENG Fu-jun. Comparison and analysis of drought monitoring remote sensing indexes in the desert oasis area[J]. HUBEI AGRICULTURAL SCIENCES, 2022, 61(5): 181-185.

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