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在沟道中设置拦沙坝,对控制径流量、增加入渗、拦截径流中泥沙均起着重要作用。研究结果如下:坝的安装没有改变主要径流事件的数量,但降低了由暴风雨引起的少于1 a的发生间期的径流事件的数量;和总径流相比坝阻挡的水量是小的,但可减缓径流速度;坝的泥沙截留率超过50%;拦沙坝的间距设置尤为重要,使坝的下游和下一个坝的上游顶部连接上;在流速慢、沟道窄的地方,能够形成较大面积的河床,便于植被的恢复和生长。
Set up the barrage in the channel, plays an important role in controlling runoff, increasing infiltration, intercepting sediment in runoff. The results of the study are as follows: The dam installation did not change the number of major runoff events, but reduced the number of runoff events occurring during a storm event of less than 1 year; and the amount of water blocked by the dam was smaller than the total runoff The sediment retention rate of the dam is over 50%; the spacing of the dam is particularly important, so that the downstream of the dam is connected with the top of the upstream of the next dam; where the flow velocity is slow and the channel is narrow, it can form Larger area of the riverbed, facilitate the restoration and growth of vegetation.