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

3rd International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Zhang, Pan^1 ; Yao, Wenyi^1 ; Xiao, Peiqing^1 ; Sun, Weiying^1

Key Laboratory of Soil and Water Loss Process and Control on the Loess Plateau, Ministry of Water Resources, Yellow River Institute of Hydraulic Research, Zhengzhou

450003, China^1

关键词: Human activities;    Rainfall variation;    Runoff and sediments;    Sediment reduction;    Soil and water conservation;    Specific sediment yield;    Water and soil conservations;    Water and soil loss;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/113/1/012033/pdf
DOI  :  10.1088/1755-1315/113/1/012033

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

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.