北京洪水峪泥石流形成条件探讨

洪水峪泥石流、沟内崩塌、不稳定斜坡等不良地质现象发育。该沟内煤矸石、沟道物源丰富,上游汇水面积大,沟道纵坡降较大,在强降雨沟道径流冲刷作用下,极易发生揭底起动而形成泥石流灾害。在雨季,支沟常有少量泥沙、块石冲出,阻塞进山道路,淤塞河道,引起原有坝体损毁,威胁居民生命财产安全。通过对以往资料的综合整理,结合现场调查,对洪水峪泥石流形成的诸多条件进行了分析,以期对该区泥石流的防治与预测起到参考作用。

Discussion on debris flow formation conditions in Hongshuiyu area,Beijing

There are many baleful geological phenomena such as debris flow, collapse in gully and unstable slope are well developed in Hongshuiyu area which has abundant coal gangue and gully material sources, large surface of upstream catchment,relatively large longitudinal slope of gully. Debris flow disaster of gutter bottom flushing easily occurs underimpact of strong rainfall gully runoff erosion. In rainy season, a small amount of silt and rocks often rush out of ditch, blocking roads to mountain, silting up river, causing damage to original dam, threatening safety of residents and properties. Through collection and analysis of previous data, combined with the field investigation, this paper discusses and analyzes the formation conditions of the flood valley mud-rock flow, and finally gets some conclusions.