摘要
泥石流是一种破坏力较强的地质灾害,对生态环境及居民生活均会造成较大威胁.为减轻泥石流引发的损害,对泥石流风险进行分析研究至关重要.在对下碑寺乡泥石流沟踏勘及调研的基础上,建立水动力模型,考虑该区域的降雨、来流、地形、植被覆盖率、建筑物分布等影响因子,定量研究工程尺度上泥石流灾害风险区域.结果表明,该模型针对丰水期及 P=5%、P=2%、P=1%条件下计算分析泥石流影响区域分别为 0.80 km2、2.97 km2、4.43 km2.模型可动态输出不同降雨强度下的影响区域,可用于山区洪水预警,为泥石流风险研判、预测和水利调控等综合措施下的水动力响应提供了模型方法和技术支撑.
Abstract
Debris flow is a highly destructive geological disaster that poses a significant threat to the ecological environment and residents' lives. It is crucial to analyze and study the risk of debris flow in order to reduce the damage caused by it. Based on the survey and investigation of the debris flow gully in Xiabei Temple,a hydrodynamic model is established,taking into account factors such as rainfall,inflow,terrain,vegetation coverage,and building distribution in the area,to quantitatively study the risk area of debris flow disasters on an engineering scale. The results show that the model calculates and analyzes the impact areas of debris flow during high water periods and under P=5％,P=2％,and P=1％ conditions,which are 0. 80 km2,2. 97 km2,and 4. 43 km2,respectively. The model can dynamically output the affected areas under different rainfall intensities,which can be used for flood warning in mountainous areas. It provides model methods and technical support for hydrodynamic response under comprehensive measures such as debris flow risk assessment,prediction,and water conservancy regulation.
维普
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