陕西师范大学学报（自然科学版）2017，Vol.45Issue(4)：114-119,6.DOI:10.15983/j.cnki.jsnu.2017.04.444
红壤丘陵区3种典型坡面排水沟的排水输沙特征
Characteristics of drainage and sediment transport for three typical ditches in red earth hilly area
摘要
Abstract
A field scouring experiment was conducted in red soil hilly region to study the characteristics of drainage and sediment transport of cement ditch, earth ditch and grass ditch.The results suggested the start time and cut-off time of runoff for different ditches were significantly different(P<0.05).The start time and cut-off time of runoff for three ditches decreased in an order of cement ditch,earth ditch and grass ditch.With the increase of the scour flow, the start time decreased, but the cut-off time showed no significant variation trend.Secondly, the descend order of the drainage velocity in different ditches was cement ditch, soil ditch and grass ditch.The drainage flow velocity of the cement ditch and the earth ditch increased at first and then tended to be stable with the increase of the distance from the slope section, but drainage velocity in grass ditch decreased.With the increase of scour flow from 6 L/min to 12 L/min, the average drainage velocity in cement ditch, soil ditch and grass ditch increased by 14%, 32% and 40%, respectively.Drainage per unit time in the cement ditch was highest, followed by the earth ditch, and the grass ditch was lowest.With the increasing of scour flow, total runoff increased.The runoff process firstly increased and then tended to be stable in all of ditches.Lastly, there are significant differences in sediment yields among different ditches.The sediment load decreased in an order of cement ditch, earth ditch and grass ditch.As scour flow increased, the sediment yields in all ditches increased.The drainage and sediment load of different ditches were significantly different in the red soil hilly region.关键词
红壤丘陵区/排水沟/产流/产沙/放水试验Key words
red earth hilly area/drainage ditch/sediment transport/scouring experiment分类
农业科技引用本文复制引用
陈晓安,杨洁,汤崇军,段剑,万佳蕾,郑太辉..红壤丘陵区3种典型坡面排水沟的排水输沙特征[J].陕西师范大学学报（自然科学版）,2017,45(4):114-119,6.基金项目
国家自然科学基金(41401312) （41401312）
水利部公益性行业专项(201301050) （201301050）
水利部948项目(201519) （201519）
江西省优势科技创新团队建设项目(20152BCB24011) （20152BCB24011）
江西省水利科技项目(KT201507 （）
KT201419) （）
