通过对成县黄渚镇赵河沟泥石流形成条件、发育机制及特征的研究,阐述了该沟泥石流灾害的严重性。提出了“支沟拦挡、主沟固沟、沟口排导”的综合治理方案,并就各项工程的特点、形式有针对性地进行了改进。工程建成后,赵河沟泥石流将变成夹沙洪水,对黄渚镇的危害基本消除。
Zhaohegou is one of well known debris flow disastrous gullies in Chengxian County. There are 390.78×104m3 loosed solid materials in the gully with very favorable formation conditions for debris flows. In order to protect the farmland, the villages, the roads and Huangzhu city in the upper reach of Dong River, based on the formation mechanism, the developmental mechanism and the features of debris flows in Zhaohegou, this paper analyzes the seriousness of the debris flow disaster and the necessity of its prevention. A comprehensive controlling program is put forward, taking the blocking as the dominant measure,and combining the comprehensive treatments of the debris flow silting ground, the draining channel and the barrage. After the project is completed, the comprehensive benefits will be produced every year. Now the debris flow has been changed into a usual flood flow. Its threat to Dangchang town has been eliminated. The operation of the project is analyzed to reveal its engineering deficiencies. Considering the characteristics of the debris flow; the project is evaluated, focusing on the design of the control projects, the advantages of these projects and the optimizing methods. This analysis provides some guidelines for the prevention and control against debris flow.
