摘要
马槽沟流域面积13.1平方公里,上游清水供给区面积占26%,中游断层破碎带面积占32%,下游黄土滑坡区面积占42%。泥石流固体物质主要来自中下游。为一条多发性粘性泥石流沟,输入北峪河的泥砂量约占北峪河含砂量的1/4,对北峪河口的武都县城危胁很大。该沟中下游滑坡连接成片,但滑坡在沟岸的临空高度平均只有1.1米,最高者也不超过4.5米,而且滑坡轴线大体和沟槽垂直,有利于采用建坝拦淤以稳固滑坡的防治方案。为此,主沟布设了13座拦挡坝,现已完成7座,经过两年的洪水和泥石流考验,效果良好。
The total river basin areas of Macao gully is 13.1km^2, the clear watersupply areas in upstream, the middle stream fault destructive belt areasand the down stream loess slide areas occupies 26%, 32% and 42% of totalbasin area respectively. It is a viscous debris flow gully which bursts fre-quently,the solid substances of debris flow mainly come from middle anddown stream. The sediment load carried to Beiyu river occupies about onequarter of Beiyu river, so at the mouth of the river it threatens Wuducounty town. Although the landslides of the down stream of this gullyare connected in a large sheet, the mean free face hight of side in thegully wall is only 1.1m, the highest is no more than 4.5 m,and the axisof the slideis more or less vertical with the gully trough. It is suitablefor taking the measure to construct dam holding buck slides, for thisreason 13 dams were designed for main gullies, testing in two years forflood and debris flow has demonstrated that seven of the dams built madegood resulss.
出处
《水土保持通报》
CSCD
北大核心
1989年第6期50-60,共11页
Bulletin of Soil and Water Conservation
