Variation of runoff and sediment discharge and response to human activities in the Ganjiang River
Author(s): GU Chao-jun, MU Xing-min, GAO Peng, WAN Xiao-xing, Institute of Soil and Water Conservation, Northwest A&F University, Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Jiangxi Province Supervision Station for Soil and Water Conservation
Pages: 38-44
Year: 2016 Issue: 3
Journal: Journal of Sediment Research
Keyword: soil and water conservation; construction of reservoirs; runoff; sediment; Ganjiang River;
Abstract: The problems of seasonal dry in Poyang Lake frequently in recent years were attracted wide attention. As the longest river in Poyang Lake water system,the runoff and the sediment of Gan Jiang River are also being more attention. Based on the runoff and sediment data of Waizhou hydrological station and main weather station measured rainfall from 1962 to 2013,the characteristics of rainfall,runoff and sediment transport were analyzed by statistical methods,and the impact of human activities on runoff and sediment yield were assessed. Results showed that surface rainfall and runoff with a rising trend is not significant,but sediment transport were significantly decreased,and experienced four stage as periods of flat,high,flat,and low. The obvious change points of annual sediment load occurred in 1984 and 1992. Compared to 1962- 1983,human activities make sediment discharge decreased by 36. 3% from 1984 to 1991 and make sediment discharge decreased by 88. 1% from 1992 to 2013. Soil and water conservation and construction of reservoirs are the dominant factors to reduce annual sediment in the Ganjiang River basin.
Pages: 38-44
Year: 2016 Issue: 3
Journal: Journal of Sediment Research
Keyword: soil and water conservation; construction of reservoirs; runoff; sediment; Ganjiang River;
Abstract: The problems of seasonal dry in Poyang Lake frequently in recent years were attracted wide attention. As the longest river in Poyang Lake water system,the runoff and the sediment of Gan Jiang River are also being more attention. Based on the runoff and sediment data of Waizhou hydrological station and main weather station measured rainfall from 1962 to 2013,the characteristics of rainfall,runoff and sediment transport were analyzed by statistical methods,and the impact of human activities on runoff and sediment yield were assessed. Results showed that surface rainfall and runoff with a rising trend is not significant,but sediment transport were significantly decreased,and experienced four stage as periods of flat,high,flat,and low. The obvious change points of annual sediment load occurred in 1984 and 1992. Compared to 1962- 1983,human activities make sediment discharge decreased by 36. 3% from 1984 to 1991 and make sediment discharge decreased by 88. 1% from 1992 to 2013. Soil and water conservation and construction of reservoirs are the dominant factors to reduce annual sediment in the Ganjiang River basin.
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