Changes in sediment discharge in a sediment-rich region of the Yellow River from 1955 to 2010: implications for further soil erosion control

作     者：JuYing JIAO ZhiJie WANG GuangJu ZHAO WanZhong WANG XingMin MU 

作者机构：Institute of Soil and Water Conservation Northwest A&F University Institute of Soil and Water Conservation Chinese Academy of Sciences and Ministry of Water Resources 

出 版 物：《Journal of Arid Land》 (干旱区科学（英文版）)

年 卷 期：2014年第6卷第5期

页      面：540-549页

核心收录：

学科分类：082802[工学-农业水土工程] 090707[农学-水土保持与荒漠化防治] 0907[农学-林学] 08[工学] 0828[工学-农业工程] 09[农学] 0815[工学-水利工程] 

基　　金：funded by the Major Programs of the Chinese Academy of Sciences (KZZD-EW-04-03-04) the National Science-technology Support Plan Project (2006BAD09B10) the Knowledge Innovation Program of the Chinese Academy of Sciences (KZCX2-EW-406) 

主　　题：sediment delivery modulus(SDM) Yellow River hydrological station(s)-controlled sub-area soil and water conservation 

摘      要：The well-documented decrease in the discharge of sediment into the Yellow River has attracted considerable attention in recent years. The present study analyzed the spatial and temporal variation of sediment yield based on data from 46 hydrological stations in the sediment-rich region of the Yellow River from 1955 to 2010. The results showed that since 1970 sediment yield in the region has clearly decreased at different rates in the 45 sub-areas controlled by hydrological stations. The decrease in sediment yield was closely related to the intensity and extent of soil erosion control measures and rainstorms that occurred in different periods and sub-areas. The average sediment delivery modulus（SDM） in the study area decreased from 7,767.4 t/（km^2·a） in 1951–1969 to 980.5 t/（km^2·a） in 2000–2010. Our study suggested that 65.5% of the study area with the SDM below 1,000 t/（km^2·a） is still necessary to control soil deterioration caused by erosion, and soil erosion control measures should be further strengthened in the areas with the SDM above 1,000 t/（km^2·a）.