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[1]XUE Tianyi,BAI Jianjun.Spatiotemporal Variations of Spring Drought Based on TVDI and Meteorological Index in Shaanxi Province[J].Research of Soil and Water Conservation,2017,24(04):240-246.

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Spatiotemporal Variations of Spring Drought Based on TVDI and Meteorological Index in Shaanxi Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 04 Page number: 240-246 Column: Public date: 2017-08-28

Title:: Spatiotemporal Variations of Spring Drought Based on TVDI and Meteorological Index in Shaanxi Province

Author(s):: XUE Tianyi^1,2, BAI Jianjun¹; 1. College of Tourism and Environmental, Shaanxi Normal University, Xi’an 710119, China;
2. College of Urban and Environmental Sciences, Peking University, Beijing 100871, China

Keywords:: remote sensing; drought in Shaanxi; TVDI; meteorological data; the spatiotemporal variation

CLC:: TP79

DOI:: -

Abstract:: Shaanxi is located in the hinterland of China where is vulnerable to the impacts of drought, it is significant to analyze the spatiotemporal variations of drought of Shaanxi Province. Based on temperature vegetation drought index (TVDI) obtained from the moderate resolution imaging spectroradiometer (MODIS) products (MOD11A2 and MOD13A2), we established the NDVI-Ts characteristic space. Based on TVDI that can reflect the degree of drought with the use of soil moisture data and meteorological indexes, we analyzed the spatiotemporal variation of spring drought in Shaanxi Province by using TVDI data. The results showed that: (1) there was the negative correlation between TVDI and soil moisture, and the negative correlation between TVDI and precipitation, and there was the time lag between the TVDI and precipitation; (2) in the past 16 years in Shaanxi Province, the tendency of drought severity descended, within a year, the tendency increased from February to May; (3) the arid region distributed in northern part of north Shaanxi and the northeastern part of Guanzhong Plain in the past 16 years, the drought of south Shaanxi area, the south of north Shaanxi and the southwestern part of Guanzhong Plain was relatively slight.

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