水土保持研究2017，Vol.24Issue(3)：65-69,5.
黄土区沟道阶梯状边坡水土流失防治措施与机理
Measures and Mechanism to Prevent Water Loss and Soil Erosion on Multi-Stair Slope in Loess Area
摘要
Abstract
The new built multi-stair slope in gully of loess area is susceptible to soil erosion.We used the simulated rainfall experiment to examine the relation among soil and water conservation measures,rainfall intensity and the phenomenon of soil erosion on multi-stair slope in loess area and observed the development process of soil erosion.The results show that the extreme weather conditions (rainfall intensity 120 mm/h) and upslope runoff are two key factors leading to soil erosion on multi-stairs slope in loess area.When the rainfall intensities ranged between 60 mm/h～90 mm/h,the sediment yield rate influenced by the rainfall was stable.There was no obvious difference between phenomena of soil erosion and the slope without obvious damage,When the rainfall intensity was 120 mm/h the sediment yield rate rose quickly,the phenomenon of soil erosion was obvious.The reverse slope measure can effectively reduce the sediment yield by 58.4％,35.2％,62.1％ and reduce the runoff by 69.6％,26.6％,60.8％,respectively,under the rainfall intensities of 60 mm/h,90 mm/h and 120 mm/h.At the same time,the erosion rate decreased.Water test was used to simulate the slope without drain measures.The results show that drain measures can effectively reduce the sediment yield by 92.7％,and at the same time changed the development phenomenon of erosion,the drain measure turned the erosion phenomenon from rill erosion to sheet erosion.From the point of view of water and sediment reduction,the drain measures and reverse slope measures are both effective measures to prevent water loss and soil erosion on multi-stair slope in loess area.关键词
黄土陡坡/土壤侵蚀/水土保持Key words
loess steep slope/soil erosion/soil and water conservation分类
农业科技引用本文复制引用
刘佳鑫,刘刚,刘普灵..黄土区沟道阶梯状边坡水土流失防治措施与机理[J].水土保持研究,2017,24(3):65-69,5.基金项目
陕西省科技统筹创新工程计划(2013KTDZ03-03-01) （2013KTDZ03-03-01）
国家科技支撑计划项目(2015BAC01B03-03) （2015BAC01B03-03）
中国科学院“西部之光”人才培养计划(人字(2014)91号) （人字(2014）
西北农林科技大学博士科研启动基金(2013BSJJ082) （2013BSJJ082）
