Impacts of precipitation variation and soil and water conservation measures on runoff and sediment yield in the Loess Plateau Gully Region, China

查看全文 作　　者：XIA [1]Lu;SONG Xiao-[1]yu;FU [1]Na;MENG Chun-[1,2]fang;LI Huai-[3]you;LI Yao-[3]lin

机构地区：[1]State Key Laboratory Base of Eco-hydraulic Engineering in Arid Area, Xi'an University of Technology, Xi'an 710048, China;[2]Xinxiang Hydrology and Water Resources Survey Bureau, Xinxiang 453000, China;[3]Xifeng Scientific Experiment Station of soil and water conservation, Yellow River conservancy committee, Xifeng 745000, China

出　　处：《Journal of Mountain Science》索引2017年第14卷第10期,共14页

基　　金：supported by the National Natural Science Foundation of China (51239009, 41171034);Shaanxi Provincial Natural Science Foundation of China (Key) Project (2013JZ012);Shaanxi Provincial Key Laboratory Project of Department of Education (14JS059);Shaanxi Provincial Water Conservancy Science and Technology Project (2016slkj-11) 摘　　要：The Loess Plateau of China has experienced a lengthy drought and severe soil erosion.Changes in precipitation and land use largely determine the dynamics of runoff and sediment yield in this region. Trend and mutation analyses were performed on hydrological data(1981–2012) from the Yanwachuan watershed in the Loess Plateau Gully Region to study the evolution characteristics of runoff and sediment yield. A time-series contrasting method also was used to evaluate the effects of precipitation and soil and water conservation(SWC) on runoff and sediment yield. Annual sediment yield declined markedly from 1981 to 2012 although there was no significant change in annual precipitation and annual runoff. Change points of annual runoff and annual sediment yield occurred in 1996 and 1997,respectively. Compared with that in the baseline period(1981–1996), annual runoff and annual sediment yield in the change period(1997–2012)decreased by 17.0% and 76.0%, respectively, but annual precipitation increased by 6.3%. Runoff decreased in the flood season and normal season, but increased in the dry season, while sediment yield significantly declined in the whole study period. The SWC measures contributed significantly to the reduction of annual runoff(137.9%) and annual sediment yield(135%) and were more important than precipitation. Biological measures(forestland and grassland) accounted for 61.04% of total runoff reduction, while engineering measures(terraces and dams) accounted for 102.84% of total sediment yield reduction. Furthermore, SWC measures had positive ecological effects. This study provides a scientific basis for soil erosion control on the Loess Plateau. 关键词：黄土高原沟壑区中国黄土高原年径流量降水变化水土保持产量泥沙水土流失治理

相关文献

参考文献（48）
引证文献（9）
耦合文献（442）

参考文献(48)

引证文献(9)

耦合文献(442)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Impacts of precipitation variation and soil and water conservation measures on runoff and sediment yield in the Loess Plateau Gully Region, China

参考文献(48)

引证文献(9)

耦合文献(442)

用户提示