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[1]ZHAO Feifei,ZHANG Xianyun,FU Ting,et al.Variation of Soil Moisture of Its Response to Climate Change in Different Geomorphological Types of Guizhou Province[J].Research of Soil and Water Conservation,2021,28(06):217-225.

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Variation of Soil Moisture of Its Response to Climate Change in Different Geomorphological Types of Guizhou Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 28 Number of periods: 2021 06 Page number: 217-225 Column: Public date: 2021-10-10

Title:: Variation of Soil Moisture of Its Response to Climate Change in Different Geomorphological Types of Guizhou Province

Author(s):: ZHAO Feifei¹，ZHANG Xianyun¹，FU Ting¹，LIAO Liufeng²，NIE Shihai¹; (1.Mining Colllege，Guizhou University，Guiyang 550025，China; 2.Guizhou Ecological Meteorology and Satellite Remote Sensing Center，Guiyang 550002，China)

Keywords:: soil moisture; spatiotemporal variation; M-K mutation test; meteorological factors

CLC:: P237

DOI:: -

Abstract:: In order to explore the temporal and spatial variation of soil moisture in different geomorphological types in Guizhou Province and its response to climate change，based on the fifth generation reanalysis data set of the European Center for Medium Range Weather Forecast，the linear regression，sliding average，Mann-Kendall mutation test，sliding T test and correlation analysis were used to analyze the temporal and spatial variation characteristics of soil moisture in Guizhou Province，and the influence of changes in temperature and precipitation on soil moisture was revealed. The results show that:(1)in the past 31 years，the soil moisture contents in the surface layer(0—7 cm)，middle layer(7—28 cm)and deep layer(28—100 cm)of Guizhou Province had shown a significant decrease trend，which was accelerated with the increase of soil depth;(2)the decreasing rate of soil moisture at different depths in Guizhou Province was characterized by spatial distribution characteristics of quickness in the west and slowness in east，among which the decline was most obvious in peak-cluster depression area;(3)from 1979 to 2009，the correlation between soil moisture and precipitation in each layer of the study area was stronger than that between soil moisture and temperature，showing a spatial distribution characteristic of high in the east and low in the west; however，in karst basins and karst valleys，the correlation between soil moisture and temperature was closer;(4)after 2001，the correlation between soil moisture and precipitation in each layer decreased by 10.29% on average，while the correlation with temperature increased by 137.59%; this phenomenon was most obvious in karst plateaus and peak cluster，indicating that temperature might be the leading factor causing the abrupt change of soil moisture in 2001.

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Last Update: 2021-10-10