本文選題：泥石流　切入點：降雨　出處：《中國地質(zhì)大學(xué)(北京)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：陜西省寶雞地區(qū)地質(zhì)條件復(fù)雜,泥石流災(zāi)害頻發(fā),給當(dāng)?shù)厝嗣竦纳敭a(chǎn)、交通安全等帶來極大威脅。當(dāng)某地區(qū)具備了泥石流發(fā)生的地形條件和物源儲備時,泥石流的暴發(fā)時間、危險范圍、規(guī)模大小主要取決于降雨條件,因此研究泥石流對降雨的響應(yīng)對于泥石流的預(yù)警和災(zāi)害防治有重要意義。目前,對于泥石流研究的一個重要方向和趨勢是泥石流的數(shù)值模擬,據(jù)此可以模擬泥石流的運動狀態(tài)、致災(zāi)范圍以及進(jìn)行危險性評價。本文以寶雞地區(qū)典型溝谷型泥石流——磨溝泥石流為研究對象,通過對磨溝地區(qū)地質(zhì)資料以及降雨數(shù)據(jù)的收集,基于FLO-2D軟件,對自然條件下的泥石流進(jìn)行數(shù)值模擬,得出泥石流的堆積范圍、堆積深度、流動速度、沖擊力值、沖起爬高高度等,并與實際情況進(jìn)行對比,驗證了模擬結(jié)果的可靠性。根據(jù)模擬結(jié)果對研究區(qū)的泥石流災(zāi)害進(jìn)行了危險性分區(qū)。對可能發(fā)生的降雨情況進(jìn)行了泥石流運動情況的模擬預(yù)測,并進(jìn)行了危險性分區(qū),預(yù)測給定降雨誘發(fā)的泥石流的堆積范圍、運動狀況及危險性大小,為泥石流的預(yù)測提供有效的數(shù)據(jù)和信息。最后,將兩種不同降雨情況下的泥石流運動情況和危害情況進(jìn)行對比分析,為該地區(qū)泥石流的氣象預(yù)警區(qū)劃、減災(zāi)工作安排以及區(qū)域建設(shè)提供一定的參考。
[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.
【學(xué)位授予單位】：中國地質(zhì)大學(xué)(北京)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P642.23
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本文編號：1585648