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[1]LI Hui,YIN Hui,BAI Yang,et al.Research on Evolution Characteristics and Tendency Prediction of Runoff and Sediment in Recent 60 Years in Dongting Lake[J].Research of Soil and Water Conservation,2013,20(03):139-142.

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Research on Evolution Characteristics and Tendency Prediction of Runoff and Sediment in Recent 60 Years in Dongting Lake

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 20 Number of periods: 2013 03 Page number: 139-142 Column: Public date: 2013-06-28

Title:: Research on Evolution Characteristics and Tendency Prediction of Runoff and Sediment in Recent 60 Years in Dongting Lake

Author(s):: LI Hui^1,2, YIN Hui³, BAI Yang³, WANG Yue^1,2; 1. College of Environment & Resources, Guangxi Normal University, Guilin, Guangxi 541004, China;
2. Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Guangxi Normal University, Ministry of Education, Guilin, Guangxi 541004, China;
3. Department of Tourism, Huizhou University, Huizhou, Guangdong 516007, China

Keywords:: runoff and sediment; evolution characteristics; tendency; Dongting Lake

CLC:: P332.5

DOI:: -

Abstract:: According to data of annual runoff and sediment in the Dongting Lake from 1951—2009, non-parameter Mann-Kendall tendency analysis (M-K method) and grandualness analysis (T-verifying method) were used to analyze the evolution characters and tendency of runoff and sediment in the Dongting Lake in recent 60 years. Year series was chosen as independent variable, and polynomial functions were used to fit accumulative runoff volume and sediment discharge in the Dongting Lake. The results showed that:① in recent 60 years in Dongting Lake area, runoff volume and sediment discharge from three outlets to Dongting Lake, sediment discharge from four rivers to Dongting Lake, runoff volume and sediment discharge in the output of Chenglingji showed significant decreasing tendency except the inconspicuous tendency of runoff volume from four rivers to Dongting Lake; ② the evolution process of runoff volume and sediment discharge simultaneously showed certain stage characteristics; ③ evolution characteristics and tendency of runoff volume and sediment discharge in Dongting Lake area were due to the curve-cuttings in the lower Jingjiang River system, the flow-cutting at Gezhouba Dam, Three Gorge Project, and other water conservancy projects.

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