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[1]SONG Feng-jun,MU Xing-min,BAI Hua.Variation of Sediment Discharge in the Jialingjiang River Basin[J].Research of Soil and Water Conservation,2012,19(05):65-69.

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Variation of Sediment Discharge in the Jialingjiang River Basin

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 19 Number of periods: 2012 05 Page number: 65-69 Column: Public date: 2012-10-20

Title:: Variation of Sediment Discharge in the Jialingjiang River Basin

Author(s):: SONG Feng-jun¹, MU Xing-min^1,2, BAI Hua¹; 1. College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China

Keywords:: Jialing River; sediment discharge; soil and water conservation; variation of sediment

CLC:: P332.5;TV148.7

DOI:: -

Abstract:: Severe soil erosion in the Jialing River Basin contributes to large amount of sediment yields in the upper reaches of the Yangtze River. Analysis on variation of sediment discharge is helpful to understand the mechanism of soil erosion and impacts of human activities. This paper applied the Mann-Kendall test and double mass curve methods to detect the variation of annual and monthly sediment flux at Beibei station in the Jialing River. The results indicated that a general decline in sediment discharge was detected, and the changing point at 1992 was found. Furthermore, the streamflow showed slight increasing trend, while the sediment flux reduced significantly at 95% confidence level. Sediment yield mainly occurred during the flood season from July to September, accounting for more than 72% of the annual amount. Double curve analysis between sediment flux and precipitation showed two stages for the whole study period Ⅰ(1956-1984) and Ⅱ(1985-2008). Soil and water conservation is responsible for the notable reduction in sediment flux, accounting for about 75%.

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