高原植被对泥石流的影响

Influence of Plateau Vegetation on Debris Flow

泥石流是常见的地质灾害,但其治理一直是一大难题。常规的人为治理方式很难对所有类型的泥石流都起作用,而采用生物工程的手段可为泥石流治理提供参考。为证实这一观点,基于遥感影像与现场踏勘,对西藏自治区昌都市八宿县25处泥石流的易发性与植被进行调查。通过泥石流的易发性与植被率的对比得出:植被率低于10%时泥石流易发生;植被率高于30%时泥石流不易发生。由此可知,高原植被在在未达到阈值的前提下对泥石流灾害有一定的抑制作用。

Debris flow is a common geological disaster,but its control is always a difficult problem.It is difficult to treat all types of debris flow with conventional artificial treatment methods,but biological engineering can provide reference for the treatment of debris flow.In order to confirm this view,based on remote sensing images and site survey,the susceptibility and vegetation of 25 debris flows in Batu County,Qamdo City,Tibet Autonomous Region were investigated.According to the comparison between the susceptibility of debris flow and the planting rate,debris flow is easy to happen when the planting rate is less than 10%.Debris flow is not easy to happen when the planting rate is higher than 30%.The results showed that the plateau vegetation had a certain inhibitory effect on debris flow disaster under the premise of not reaching the threshold value.