Title: Short-Term Tendency of Water and Sediment Reduction through Soil Conservation and Its Cause of Formation in Coarse and Sediment Concentrated Regions in the Middle Yellow River
Abstract: Based on the study of long series hydrological and precipitation data from 1950 to 1997 and analysis on time variation tendency of annual sediment delivery and annual precipitation of the reach between Hekouzhen and Longmen in the middle Yellow River, the paper finds that the sediment coming into the Yellow River has been increased in the period of 1986~1997 based on the overall condition of reduction in the coarse and heavy sediment concentrated regions since 1970. This increasing tendency is closely related with the situation of the reduction of warping dams building since 1980's and lost effectiveness of most warping dams and reservoirs for sediment retaining built in 1970's. In addition, the man-made sediment increase is greatly in 1990's, making up about 22% of sediment reduction through soil and water conservation measures and partially counteracting sediment reduction benefits gained through soil and water conservation measures. This is an important reason why the sediment coming into the Yellow River is increased in 1990's. The paper puts forward some countermeasures and suggestions in accordance with existing issue.
Publication Year: 2004
Publication Date: 2004-01-01
Language: en
Type: article
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