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[1]JING Juanli,LUO Fulin,WANG Yongfeng,et al.Spatial and Temporal Dynamics of Precipitation in Dian-Qian-Gui Karst Area from 1998 to 2017[J].Research of Soil and Water Conservation,2019,26(05):158-165.

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Spatial and Temporal Dynamics of Precipitation in Dian-Qian-Gui Karst Area from 1998 to 2017

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 05 Page number: 158-165 Column: Public date: 2019-09-06

Title:: Spatial and Temporal Dynamics of Precipitation in Dian-Qian-Gui Karst Area from 1998 to 2017

Author(s):: JING Juanli^1,2, LUO Fulin¹, WANG Yongfeng^1,2, WANG Anna¹; 1. College of Geomatics and Geoinformation, Guilin University of Technology, Guilin, Guangxi 541004, China;
2. Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin, Guangxi 541004, China

Keywords:: TRMM; Dian-Qian-Gui Karst Area; trend analysis; Mann-Kendall test; Hurst index

CLC:: P468

DOI:: -

Abstract:: In order to study the spatial and temporal variation of precipitation in Dian-Qian-Gui Karst Area of China, TRMM 3B43 precipitation data from 1998 to 2017 and 72 rain gauge station data from 1998 to 2012 were used to verify the TRMM 3B43 data on monthly scale by correlation coefficient and relative deviation. The spatial and temporal dynamics of precipitation were quantitively analyzed by using Sen-Median method, Mann-Kendall test and Hurst index. The results showed that:(1) there was a high correlation (r=0.92,p<0.01) between TRMM 3B43 precipitation data and gauge data on monthly scale; (2) the precipitation in the study area showed an insignificant fluctuation and an increasing trend from 1998 to 2017, with an increasing rate of 0.716 mm/year (p>0.05); the changing trend of precipitation in spring and summer mainly decreased, while that in autumn and winter mainly increased; (3) the spatial distribution of mean precipitation was significantly different on annual and seasonal scale; and the annual precipitation with a trend of increasing accounted for 47.71%, which was slightly higher than decreasing areas accounting for 41.71%; in spring and summer, the precipitation had a dominant trend of decreasing, while in autumn and winter, it was mainly increasing; (4) areas with annual precipitation continuous increasing accounted for 38.45%, mainly distributed in Guangxi, southeastern Guizhou, and the border of Yunnan and northern Guizhou. However, areas with annual precipitation decreasing occupied 46.21%, mainly distributed in Yunnan and Guizhou. The research results are of great significance to the management of water resources and disaster monitoring in the study area.

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