Research on drought monitoring in Henan Province based on drought index of vegetation remote sensing
Nowadays,there are many types of drought monitoring indices based on vegetation remote sens-ing,while their applicability needs to be considered in different areas since these indices have spatial heterogeneity.Therefore,the MODIS data in Henan Province from 2000 to 2018 were selected in this paper,four drought monitoring models based on vegetation index were calculated,and their correlation research with sc-PDSI were conducted to evaluate its applicability in the study area,as well as to provide basis for effective drought monitoring for granaries in Central China.The results indicated that,all the four models showed an overall increasing trend of drought,and especially the CWSI and VSWI indexes.From a spatial perspective,the central drought-prone areas in Henan Province showed a trend of overall westward migration.
drought monitoringvegetation remote sensingdrought indexdrought center migration
NETL
NSTL
万方数据
维普
