宝鸡市磨沟泥石流数值模拟及危险性分区研究

发布时间：2018-03-08 21:28

  本文选题：泥石流　切入点：降雨　出处：《中国地质大学(北京)》2017年硕士论文　论文类型：学位论文

【摘要】：陕西省宝鸡地区地质条件复杂,泥石流灾害频发,给当地人民的生命财产、交通安全等带来极大威胁。当某地区具备了泥石流发生的地形条件和物源储备时,泥石流的暴发时间、危险范围、规模大小主要取决于降雨条件,因此研究泥石流对降雨的响应对于泥石流的预警和灾害防治有重要意义。目前,对于泥石流研究的一个重要方向和趋势是泥石流的数值模拟,据此可以模拟泥石流的运动状态、致灾范围以及进行危险性评价。本文以宝鸡地区典型沟谷型泥石流——磨沟泥石流为研究对象,通过对磨沟地区地质资料以及降雨数据的收集,基于FLO-2D软件,对自然条件下的泥石流进行数值模拟,得出泥石流的堆积范围、堆积深度、流动速度、冲击力值、冲起爬高高度等,并与实际情况进行对比,验证了模拟结果的可靠性。根据模拟结果对研究区的泥石流灾害进行了危险性分区。对可能发生的降雨情况进行了泥石流运动情况的模拟预测,并进行了危险性分区,预测给定降雨诱发的泥石流的堆积范围、运动状况及危险性大小,为泥石流的预测提供有效的数据和信息。最后,将两种不同降雨情况下的泥石流运动情况和危害情况进行对比分析,为该地区泥石流的气象预警区划、减灾工作安排以及区域建设提供一定的参考。
[Abstract]:The geological conditions in Baoji area of Shaanxi Province are complex, and debris flow disasters occur frequently, which brings great threat to the lives and property of local people, traffic safety, etc. When a certain area has the topographic conditions and material resources reserves for the occurrence of debris flows, The time, scope and scale of debris flow outbreaks mainly depend on rainfall conditions. Therefore, it is important to study the response of debris flows to rainfall for early warning and disaster prevention of debris flows. At present, An important direction and trend of debris flow research is the numerical simulation of debris flow, according to which the motion state of debris flow can be simulated. This paper takes the typical gully mud-rock flow-Mogou debris flow as the research object, through collecting the geological data and rainfall data in Mogou area, based on FLO-2D software. Through numerical simulation of debris flow under natural conditions, the accumulation range, accumulation depth, flow velocity, impact force value, climbing height and so on of debris flow are obtained and compared with the actual situation. The reliability of the simulation results is verified. According to the simulation results, the debris flow disasters in the study area are divided into dangerous zones, and the possible rainfall conditions are simulated and forecasted, and the dangerous zones are carried out. Predict the accumulation range, movement status and risk of debris flow induced by rainfall, and provide effective data and information for the prediction of debris flow. The movement and hazard of debris flow under two different rainfall conditions are compared and analyzed, which provides a certain reference for the meteorological early warning regionalization of debris flow in this area, the arrangement of disaster reduction and the construction of the region.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P642.23
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本文编号：1585648