Applicability of Drought Severity Index(DSI) in Remote Sensing Monitoring of Drought in Shandong Province

doi:10.3969/j.issn.1000-6362.2020.02.005

Abstract

Abstract: It is important to select a suitable drought remote sensing monitoring index for timely and accurate assessment of the impact of drought on crop growth. In this paper, the vegetation index and evapotranspiration index were integrated to form the drought severity index (DSI), and the applicability of DSI was quantitatively evaluated in drought monitoring，in order to provide scientific basis for remote sensing dynamic monitoring of drought in Shandong province. In the process of quantitatively analysis of DSI applicability, the Pearson correlation analysis was carried out on the monthly scale DSI, Normalized Difference Drought Index(NDDI), Tempera-ture Vegetation Drought Index(TVDI) and Standard Precipitation Index (SPI), Relative Soil Moisture (RSM) in the typical drought period based on the long-term sequence of the SPI, respectively. The results showed that the correlation coefficients between SPI, RSM and DSI are about 0.40 and 0.30 respectively, which were higher than the correlation between SPI, RSM and NDDI, TVDI. In addition, the occurrence of typical drought events and the change process of drought were accurately described by the spatial-temporal distribution of DSI in Shandong province during the historical period. The meteorological drought and agricultural drought was reflected by DSI, which indicated the good applicability of DSI for remote sensing monitoring of drought in Shandong province.

Key words: Remote sensing, Drought indices, DSI, Applicability, Shandong Province

TONG De-ming, BAI Yun, ZHANG Sha, LIU Qi, YANG Jin-yun. Applicability of Drought Severity Index(DSI) in Remote Sensing Monitoring of Drought in Shandong Province[J]. Chinese Journal of Agrometeorology, 2020, 41(02): 102-112.

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