Runoff and sediment variation in the areas with high and coarse sediment yield of the middle Yellow River

Massive water and soil conservation works (WSCW) have been conducted in the areas with high and coarse sediment yield of the middle Yellow River since 1982. With the impending effects of climate change, it is necessary to reconsider the effects of WSCW on runoff and sediment variation at decadal and...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2018-02, Vol.113 (1), p.12033
Main Authors: Zhang, Pan, Yao, Wenyi, Xiao, Peiqing, Sun, Weiying
Format: Article
Language:English
Subjects:
Climate change
Climate effects
Erosion control
Loss control
Rainfall
Rivers
Runoff
Sediment yield
Sediments
Soil conservation
Soil erosion
Soil water
Variation
Water conservation
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Summary:Massive water and soil conservation works (WSCW) have been conducted in the areas with high and coarse sediment yield of the middle Yellow River since 1982. With the impending effects of climate change, it is necessary to reconsider the effects of WSCW on runoff and sediment variation at decadal and regional scales. Using long-term official and synthesized data, the WSCW impacts on reducing water and soil loss were studied in Sanchuanhe River watershed. Results showed that the sediment and runoff generated from this area showed a decreasing trend in the past 50 years. A great progress has been achieved in erosion control since the 1970s. After the 4 soil and water conservation harnessing stages during the period from 1970 to 2006, the sediment and runoff yield showed decreases with the extension of harnessing. The results revealed that human activities exerted the largest effects on the sediment reduction and explained 66.6% of the variation in the specific sediment yield. The contribution of rainfall variation to runoff reduction was as large as human activities. A great benefit have been obtained in water and soil loss control in this area.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/113/1/012033