本文選題：地表水與地下水　切入點：POM　出處：《大連理工大學》2015年碩士論文　論文類型：學位論文

【摘要】：海岸帶是大陸和海洋的過渡地帶,海岸地下水參與了如海岸侵蝕、鹽水入侵、水質污染等水體交互運動。近年來,許多國內外學者已經(jīng)在地表水和地下水相互作用的問題上做了一些研究,這一領域已逐漸成為新的研究的熱點。目前的研究中,數(shù)值模擬法建立耦合模型是主要研究方法,地表水一般假設為一維河道和二維坡面流,在海岸帶區(qū)域研究較少,而且所建立模型大多限于實驗驗證,對實際情況的應用計算很少。本文應用數(shù)值模擬方法,嘗試將地表水模型與地下水模型耦合,應用經(jīng)典的瀉湖試驗進行耦合模型的驗證,并將其應用于計算實例。所建立模型將來可以用來研究濱海地區(qū)海水入侵、污染物運移等問題。論文主要研究內容有：(1)選取三維有限差分地表水計算模型POM與三維有限元地下水計算模型SUTRA,在兩個模型的海岸交界處進行處理,以水量交換作為兩個模型的耦合關系,建立海岸帶地表水和地下水計算的三維耦合數(shù)值模型。(2)模擬Ebrahimi瀉湖實驗用于耦合模型的模型驗證,通過對比觀測點的水位和速度模擬值和實測數(shù)據(jù),驗證模型計算的有效性。在實驗基礎上加入溶質運移的計算,分析了沙壩內鹽度侵入變化規(guī)律。(3)將模型應用于實例計算,建立六股河地區(qū)的近似模型,以潮汐為海洋動力條件,分別探討了不同的滲透系數(shù)參數(shù)和有無降雨條件對地下水運動的影響。
[Abstract]:The coastal zone is a transitional zone between the mainland and the ocean. Coastal groundwater is involved in the interactive movement of water bodies such as coastal erosion, salt water intrusion, water pollution and so on. Many scholars at home and abroad have done some research on the interaction between surface water and groundwater, and this field has gradually become a new research hotspot. Surface water is generally assumed to be one dimensional channel and two dimensional slope flow, but there are few studies in the coastal zone domain, and most of the established models are limited to experimental verification, and the application of calculation to the actual situation is very few. In this paper, numerical simulation method is applied. The surface water model is coupled with the groundwater model, the classical lagoon test is used to verify the coupling model, and the model is applied to the calculation example. The established model can be used to study the seawater intrusion in coastal areas in the future. The main contents of this paper are: 1) selecting 3D finite-difference surface water calculation model POM and three-dimensional finite element groundwater calculation model Sutra to deal with the coastal boundary of the two models. Taking the water exchange as the coupling relation between the two models, a three-dimensional coupled numerical model for the calculation of surface water and groundwater in the coastal zone is established. The Ebrahimi lagoon experiment is used to validate the coupled model. The validity of the model is verified by comparing the simulated values of water level and velocity and the measured data. The calculation of solute migration is added on the experimental basis, and the law of salinity invasion in sand dam is analyzed. The approximate model of Liugu River area is established. The influence of different parameters of permeability coefficient and rainfall on the groundwater movement is discussed with the tide as the marine dynamic condition.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P731.2

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本文編號：1601395