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[1]WANG Menghe,HE Guifang,XU Jianhui,et al.Research of Meteorological Drought in Jianghuai Watershed Area of Anhui Province Based on GIS[J].Research of Soil and Water Conservation,2018,25(04):162-167.

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Research of Meteorological Drought in Jianghuai Watershed Area of Anhui Province Based on GIS

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 04 Page number: 162-167 Column: Public date: 2018-06-13

Title:: Research of Meteorological Drought in Jianghuai Watershed Area of Anhui Province Based on GIS

Author(s):: WANG Menghe¹, HE Guifang², XU Jianhui³, WANG Guangsheng³, WU Jian³; 1. Nanjing Institute of Surveying, Mapping & Geotechnical Investigation, Co., Ltd., Nanjing 210019, China;
2. Geophysical Exploration Team of East China Metallurgical Bureau of Geology and Exploration, Wuhu, Anhui 241000, China;
3. Anhui Center for Collaborative Innovation in Geographical Information Integration and Application, Chuzhou University, Chuzhou, Anhui 239000, China

Keywords:: meteorological drought; standardized precipitation index; information entropy; Jianghuai Watershed Area

CLC:: S423

DOI:: -

Abstract:: In order to understand the conditions of meteorological drought in Jianghuai Watershed Area, using the daily precipitation data of 30 years and according to the information entropy theory, we calculated the standard precipitation index based on the homogeneous state intrinsic scale and variational state intrinsic scale. The results showed that in the case of superposition of two scales, the level event of especially wet and special dry is missing in Jianghuai Watershed Area; the overall level of dry and wet events normally distributes. The more extremely the level of wet and dry tended to, the smaller the probability of events happened. The probability of the normal events is over 50% and other event probability is less than 20%. In each month, the midwest area accounts for a higher share of days of meteorological drought in Jianghuai Watershed Area. The southern area is the main area of dry event occurrence in the spring and winter. And the westward area is the main area of dry event occurrence in summer. From the point of dry and wet level area, lightly dry event is easy to occur in the western and southern areas, and the western area is prone to severely dry events. These results can provide scientific basis fro research on meteorological drought for disaster prevention and mitigation in Jianghuai watershed area.

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