本文選題：巖溶地下水 + 數值模擬�。� 參考：《太原理工大學》2017年碩士論文

【摘要】：晉祠泉是我國北方著名的巖溶大泉之一,在人文和水資源環(huán)境方面均有著特殊的意義。上世紀70年代以來,多因素的影響導致泉域巖溶水位下降,晉祠泉斷流。晉祠泉域內的巖溶水作為當地主要的工農業(yè)和生活飲用水水源,其水位變化關系到當地的國計民生。因此,從晉祠泉域的水文地質條件及其影響因素入手,研究巖溶地下水水位的動態(tài)變化,將有助于為泉域巖溶水的保護及合理開發(fā)利用提供決策依據。前人對晉祠泉巖溶水位、泉流量的研究多采用集中參數模型,忽略了泉域內復雜的地質、水文地質及地下水循環(huán)運動特征。本文收集了泉域有關部門的鉆孔資料,建立了研究區(qū)的三維地質結構模型,直觀地展現了研究區(qū)巖溶地下水的賦存條件;以此為基礎,建立了晉祠泉域巖溶地下水的數值模型,并通過正交實驗法分析了參數的敏感性,建立了仿真度較高的預測模型;最后,結合當地實際的實際情況,提出預測方案,探討了晉祠泉的復流問題。取得的主要成果如下:(1)建立了晉祠泉域的三維地質結構模型。地質結構模型的建立有利于研究者深入觀察研究區(qū)內的地層起伏變化以及探究含水層內巖溶地下水的賦存及運移條件,為地下水模型的建立提供了地層標高數據。(2)建立了泉域巖溶地下水運動的機理模型。以三維地質結構模型和水均衡要素的分析為基礎,建立晉祠泉域巖溶水的地下水流數值模擬模型,并對模型進行了擬合驗證,結果表明其對地下水的水位仿真度較高。(3)采用正交實驗法,分析了模型的參數敏感度。選取滲透系數kx、ky和貯水率Ss為靈敏度分析因子,運用正交實驗法計算分析了各個參數對于模型的敏感度,顯示滲透系數的影響最大。(4)晉祠泉地下水位動態(tài)主要與大氣降水入滲補給、河道滲漏補給、巖溶地下水開采、煤礦礦坑排水以及巖溶地下水向平泉和盆地孔隙水的側向排泄量有關。綜合考慮以上因素提出泉域水位預測方案,結果表明晉祠泉復流的增補壓采方案中,壓采效果較好。
[Abstract]:Jinci Spring is one of the famous karst springs in the north of China. Since the 1970s, many factors have caused the karst water level to drop and the Jinci spring to flow. The karst water in Jinci spring area is the main water source of industry, agriculture and domestic drinking water, and its water level change is related to the local national economy and people's livelihood. Therefore, starting from the hydrogeological conditions of Jinci spring area and its influencing factors, the study on the dynamic change of karst groundwater level will be helpful to provide a decision basis for the protection and rational development and utilization of karst water in the spring area. The previous researches on the karst water level and discharge of Jinci spring mostly adopted the centralized parameter model, ignoring the complicated geological, hydrogeological and groundwater circulation characteristics in the spring region. In this paper, the borehole data of the relevant departments in the spring region are collected, the 3D geological structure model of the study area is established, and the occurrence conditions of the karst groundwater in the study area are displayed intuitively, and the numerical model of the karst groundwater in the Jinci spring area is established on this basis. The sensitivity of the parameters is analyzed by orthogonal experiment, and a prediction model with high fidelity is established. Finally, combining with the actual situation in the local area, the prediction scheme is put forward, and the reflow problem of Jinci spring is discussed. The main results are as follows: 1) the 3D geological structure model of Jinci spring area is established. The establishment of geological structure model is helpful for the researchers to observe the stratigraphic fluctuation in the study area and to explore the conditions of occurrence and migration of karst groundwater in the aquifer. The mechanism model of karst groundwater movement in spring region is established by providing stratigraphic elevation data. Based on the analysis of 3D geological structure model and water equilibrium elements, a numerical simulation model of groundwater flow of karst water in Jinci spring region is established, and the model is verified by fitting. The results show that the sensitivity of the model is analyzed by orthogonal experiment. The sensitivity of each parameter to the model is calculated and analyzed by using the orthogonal experiment method, in which the permeability coefficient Kxky and the water storage ratio S _ s are selected as the sensitivity analysis factors. It shows that the influence of permeability coefficient is the greatest. 4) the groundwater level dynamics of Jinci spring are mainly related to precipitation infiltration recharge, channel seepage recharge, karst groundwater mining, etc. Coal mine drainage and the lateral discharge of karst groundwater to Pingquan and the basin. Considering the above factors, the prediction scheme of spring water level is put forward. The results show that in the additional pressure mining scheme of Jinci spring recurrent, the effect of pressure mining is better.
【學位授予單位】：太原理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：P641.8

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1 仵彥卿，，李俊亭;全排型巖溶泉域地下水可采資源計算方法[J];工程勘察;1996年03期

2 楊撈

本文編號：1864009