澜沧江结义坡沟泥石流灾害评价

为查明坝址区是否存在泥石流地质灾害,分析其对建坝的影响,现场对结义坡泥石流沟进行了追踪调查,以充分认识沟谷的地形地貌条件、地质条件、植被发育情况以及泥石流的活动痕迹、冲淤特征等。并对泥石流沟谷、堆积扇等进行了有关的试验及量测工作。用国内外常用的计算稀性泥石流参数的公式对泥石流的流速、流量及冲击力等参数进行了计算,为正确评价泥石流地质灾害奠定基础。调查研究表明,结义坡沟泥石流活动正处于停歇期,但应注意加强集水区内水土保持工作,尤其是对结义坡沟入口段裸露坡体要引起重视。

Geological hazard assessment of JieYiPo debris flow in Lancang River

In order to investigate whether or not the debris flow will harm in dam site and assessing the effect on the construction of dam, the survey about JieYiPo debris flows is well done in field. The character of terrain,geology condition, vegetation,debris flow trail erosion and silt featuse in vale are fully cognized. Simultaneously, some experiments and meterage about the vale and debris/low fans havebeen practiced. Based on the formula about dilute debris flow, the velocity of flow, runoff and wallop of JieYiPo debris flow are computed. All of these works, offer the basic evidences for the assessment of geological hazard about debris flow. The surveys shows that the activity of JieYiPo debris flow is overblown, however, the soil and water conservation in the catchment areas should be strengthened, especially focused on the exposed sloping field in the entrance.