人民黄河2016，Vol.38Issue(3)：72-75,79,5.DOI:10.3969/j.issn.1000-1379.2016.03.020
水蚀风蚀交错区不同坡长坡面产流产沙过程
A Field Experiment of Runoff and Sediment Yielding Processes of Different Slopes in Water and Wind Erosion Crisscross Region
摘要
Abstract
The runoff and sediment yields processes of different slope lengths in water and wind erosion crisscross region were investigated by a simulated field scouring experiment. The length of the experiment was 4 m, 8 m and 16 m respectively. The results show that a) with the increasing of the scouring time the runoff generation time and stopping time increase. At runoff generation stage, when the slope length doubles, the generation time does not increase proportionately. But at the runoff generation stage, when the slope length doubles, the runoff stopping time increases proportionately. With increasing of slope the runoff velocity increases firstly, then gradually to relative stable;b) the average runoff velocity of 4m, 8m and 16m long slopes is 0. 165 m/s, 0. 170 m/s and 0. 177 m/s respectively. Namely, with increasing of slope length, the average runoff velocity increases slightly. The different slope lengths instantaneous velocity maximum occur at 8m slope. During the scouring process, the runoff velocity of 4m and 8m fluctuates more intensely than that of the 16m slope. The erosion rate of different slopes increases first and then decreases with scouring duration increase; c) the average erosion rates of 4m, 8m and 16m long slopes are 54.15, 75.32 and 23.02 g/( m2 min) respectively. With the increase of slope length, the erosion rate increases at first and then decreases. In terms of the scouring process, the erosion rate curves of 4m and 8m slopes are steep rising and falling sharply but the change of 16m slope is relative gentle and; d ) within 3 minutes, the sediment concentration of runoff of different slopes shows a peak. Then the sediment concentration decreases with various degrees. With the increase of slope length, the sediment concentration shows firstly increasing and then decreasing.关键词
产流产沙/不同坡长/野外试验/水蚀风蚀交错区Key words
runoff and sediment yield/different slope length/field experiment/water and wind erosion crisscross region分类
农业科技引用本文复制引用
王玲玲,范东明,王文龙,杨春霞,杨二,陈丽..水蚀风蚀交错区不同坡长坡面产流产沙过程[J].人民黄河,2016,38(3):72-75,79,5.基金项目
国家自然科学基金资助项目（41301299）；黄河水利科学研究院基本科研业务费专项（ HKY－JBYW－2014－06）。 （）
