Analysis of Cause for Water and Sediment Variation in Yangjiagou Watershed
Yangjiagou, a tributary gulley in Nanxiaohegou watershed, was determined as a pilot area for small watershed management in 1954. It was aimed to study the effect of soil and water conservation measures on runoff and sediment yield in small watershed by contrast with uncontrolled Dongzhuanggou watershed. Through continual regulation, retention benefit achieved by the soil and water conservation measures played a dramatic role. Analysis of measured data shows that both flood and sediment in Yangjiagou watershed has been on significant rise since the 1980s. This paper makes an analysis of the causes of water and sediment variation in Yangjiagou watershed from the angle of the number and service life of soil and water conservation measures, and draws a conclusion that water and sediment increase in Yangjiagou watershed arises from two factors: first, there has been a slowdown in the number of soil and water conservation measures that play an important role in water and sediment retention; second, the service life of gulley control works that yield great returns in soil and water conservation is limited.
runoff variation sediment variation typical small watershed Yangjiagou
Liu Bin Chang Wenzhe Xu Xiaomei Liu Pingle
Xifeng Water and Soil Conservation Test Station, YRCC, Qingyang, 745000, China
国际会议
山东东营
英文
167-177
2007-10-16（万方平台首次上网日期，不代表论文的发表时间）