Title: Recent tendency of sediment reduction in the middle Yellow River and some countermeasures
Abstract: Based on the hydrometric and rainfall data in the period 1950~1997, this study deals with the temporal variation in sediment yield and precipitation in the drainage area between Hekouzhen and Longmen, the coarse sediment producing area in the middle Yellow River. An increase in sediment yield in recent years from 1986 to 1997 has been found which is superposed on the long term increasing tendency since the 1970s. This can be related to the fact that most of the chekdams built in the 1970s and 1980s have been filled up and are no longer effective for sediment trapping. After 1980, few new checkdams have been built, and thus the sediment supplied to the Yellow River increases. Another cause for the recent increase in sediment yield is that the enhanced human activities such as road construction, coal mining, house building have increased erosion significantly. The increase of sediment thereby amounts to 22% of the sediment reduction by erosion control measures, partly offsetting the benefit induced by the latter. Some counter measures are suggested for sustainable sediment reduction in the Yellow River basin.
Publication Year: 2004
Publication Date: 2004-01-01
Language: en
Type: article
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Cited By Count: 12
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