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[1]GUO Tao,YU Hongbo,MA Zice,et al.Analysis of Spatial and Temporal Variations of Soil Moisture Content and Drought Degree Based on MODIS[J].Research of Soil and Water Conservation,2019,26(04):185-189.

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Analysis of Spatial and Temporal Variations of Soil Moisture Content and Drought Degree Based on MODIS

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 04 Page number: 185-189 Column: Public date: 2019-06-11

Title:: Analysis of Spatial and Temporal Variations of Soil Moisture Content and Drought Degree Based on MODIS

Author(s):: GUO Tao¹, YU Hongbo^1,2, MA Zice¹, CAO Congming¹; 1. College of Geographical Science, Inner Mongolia Normal University, Hohhot 010022, China;
2. Key Laboratory of Remote Sensing and Geography Information System, Inner Mongolia Normal University, Hohhot 010022, China

Keywords:: MODIS; soil water content; remote sensing inversion; drought

CLC:: S152.7

DOI:: -

Abstract:: Taking the Xilin Gol League of Inner Mongolia as the research area, based on the MODIS data, the surface water content index (SWCI) of the Xilin Gol League was obtained by inversion, which was corrected with the field measured data. The data of growing season from April to September of the dry year (2007), the normal year (2015) and the wet year (2012), July of 2000—2017 were selected, and the soil moisture content of the study area was combined with meteorological data. The temporal and spatial variation characteristics were analyzed, and the degree of aridification of the Xilin Gol League was quantitatively analyzed using soil water content. The results show that: (1) the spatial distribution of soil water content in Xilin Gol League gradually increasesed from southwest to northeast, and the soil moisture increased in the order: desert grassland < typical grassland < meadow grassland; (2) the soil water content of the Xilin Gol League in April and May did not changed much, and the spatial distribution was relatively uniform; the soil water content in June and July increased or decreased with the increase and decrease of precipitation, showing a significant increase trend from west to east; in August, soil water content basically reached the lowest value; soil moisture in September rebounded; (3) the soil water content of Xilin Gol League is positively correlated with precipitation, vapor pressure and relative humidity, and negatively correlated with temperature; (4) Xilin Gol League is dominated by moderate arid area, with the smallest proportion of severe arid area; among them, Sunite Right Banner, Erlianhot City, Sunite Zuoqi, Abaqi Banner and Inlaid Yellow Flag have been in a state of severe drought for a long time; in the eastern part of Dongwuzhumuqi Banner, the eastern part of Xiwuzhumuqi Banner and Duolun County, most cases did not suffer from drought.

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