%0 Journal Article
%T Effects of up-slope runoff and sediment on ephemeral gully erosion sediment and hydraulic parameters<br>上方来水来沙对浅沟侵蚀产沙及水动力参数的影响
%A Che Xiaoli
%A Wang Wenlong
%A Guo Junquan
%A Han Fangfang
%A <br>车小力
%A 王文龙
%A 郭军权
%A 韩芳芳
%J 中国水土保持科学
%D 2011
%I 
%X The ephemeral gully erosion was an important issue and had great distribution in the Loess Plateau. The runoff and sediment from up-slope had great impacts on slope soil erosion. In this paper, its effect on down-slope ephemeral gully erosion sediment yield and hydrodynamic parameters were analyzed by water discharge scouring experiments in fields, with the designed discharge 5L/min,10L/min and 15L/min on the slope of 26°. The results indicated that the runoff from up-slope increased the flow velocity. The Reynolds number, Froude number, stream power and shearing force increased by 33%-76%, 21%-47%, 29%-72%, 18%-42% respectively, and the Daycy-Weisbach coefficient decreased by 11%-13%, which caused the increasing sediment of the ephemeral gully erosion. Except the flow velocity and Froude number, the other hydrodynamic parameters increased over the water discharge scouring time. There was a power relationship between ephemeral gully relative increment sediment yield caused by up-slope runoff and relative increment of the stream power and shearing force.
%K runoff and sediment from up-slope
%K ephemeral gully erosion
%K sediment yield
%K hydrodynamic parameters
%K Loess Plateau gully region<br>上方来水来沙
%K 浅沟侵蚀
%K 产沙
%K 水动力参数
%K 黄土高原沟壑区
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=1A8B5357F0EF07B8&jid=398B0FB53574B6499B323155BEA84161&aid=7DD54070A8245FEAF92CB62B5FFF1088&yid=9377ED8094509821&vid=9CF7A0430CBB2DFD&iid=38B194292C032A66&sid=96C778EE049EE47D&eid=4AD960B5AD2D111A&journal_id=1672-3007&journal_name=中国水土保持科学&referenced_num=0&reference_num=0