本文選題：大會坪水源地　切入點：滲流井　出處：《長安大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：佳縣位于榆林市東南部，黃河中游陜晉峽谷右岸。近年來，縣域經(jīng)濟大力發(fā)展，佳縣確立了以紅棗和巖鹽“一紅一白”為主的經(jīng)濟發(fā)展戰(zhàn)略，但是水資源不足的狀況嚴重制約了當(dāng)?shù)亟?jīng)濟的發(fā)展，榆佳工業(yè)園區(qū)的規(guī)劃與建設(shè)更凸顯了水資源短缺的問題。建設(shè)大會坪水源地解決當(dāng)?shù)仉y題已經(jīng)迫在眉睫。 大會坪水源地位于佳縣黃河右岸，含水層以第四系松散砂卵石層和下伏第三系基巖風(fēng)化裂隙層為主，透水性強，地下水補給條件較好，具備水資源開發(fā)條件。實踐證明，不同的水資源開發(fā)模式將產(chǎn)生不同的取水效益。本文旨在運用數(shù)值模擬計算，優(yōu)選一種適合大會坪水源地的開采模式。 大會坪水源地為一典型的傍河水源地，國內(nèi)外對于傍河地下水開采主要采取四種常見模式，包括管井開采，廊道開采，輻射井開采以及滲流井開采。以上開發(fā)模式各有利弊，本文在充分了解研究區(qū)自然地理、工程地質(zhì)和水文地質(zhì)概況的基礎(chǔ)上，建立了管井取水工程的二維有限差分數(shù)值模型，同時以“滲流—管流耦合模型”理論為基礎(chǔ)，建立廊道、輻射井和滲流井取水工程的三維有限差分數(shù)值模型，通過對各取水建筑物不同方案下出水量計算結(jié)果的對比分析，確定各個開采方式的最佳開采方案。然后在各方案中，綜合考慮取水量、水質(zhì)、取水保證度等因素，選取滲流井作為大會坪水源地地下水資源開采模式。優(yōu)選方案為布設(shè)5眼五硐室滲流井，井間距500米，允許開采量為27800.00m3/d，并在此方案基礎(chǔ)上，，利用數(shù)值模型分別計算流域水庫調(diào)度及河床淤積對水源地取水量的影響；綜合考慮取水工程建成后，相關(guān)因素對水質(zhì)、水量的影響，對水源地建成后的科學(xué)開采提出可行的建議，以保證水源地取水工程長期平穩(wěn)運行。
[Abstract]:Jiaxian is located in the southeast of Yulin City, on the right bank of Shan-Jin Canyon in the middle reaches of Yellow River. In recent years, the county economy has developed vigorously, and Jiaxian has established an economic development strategy based on red jujube and rock salt "one red and one white". However, the shortage of water resources seriously restricts the development of local economy, and the planning and construction of Yujia Industrial Park highlight the problem of water shortage. The Yiping water source is located on the right bank of the Yellow River in Jiaxian County. The aquifer is mainly composed of the Quaternary loose sandy cobblestone layer and the underlying Tertiary bedrock weathering fissure layer, with strong permeability and good groundwater recharge conditions. Different water resources development models will produce different water intake benefits. The purpose of this paper is to use numerical simulation to select a suitable mining model for the Yiping water source area. The Huiping water source area is a typical riverside water source. Four common models are adopted for groundwater exploitation along the river at home and abroad, including pipe well mining, corridor mining, radiation well mining and seepage well mining. The above development models have their own advantages and disadvantages. On the basis of fully understanding the natural geography, engineering geology and hydrogeology of the study area, a two-dimensional finite difference numerical model of water intake engineering for pipe wells is established in this paper. At the same time, the corridor is established on the basis of the theory of "seepage and pipe flow coupling model". Three-dimensional finite difference numerical model of water intake engineering of radiation well and percolation well, through comparing and analyzing the calculation results of water output under different schemes of each water intake building, the optimum exploitation scheme of each mining method is determined. Considering the factors such as water intake, water quality and water intake assurance, the seepage well is selected as the groundwater resource exploitation model in Yeping water source area. The optimal selection scheme is to set up 5 five chamber seepage wells with a spacing of 500 meters. The allowable extraction capacity is 27800.00m3 / d, and on the basis of this scheme, the effects of reservoir operation and siltation of river bed on the water intake from the water source are calculated by using the numerical model, and the influence of relevant factors on water quality and quantity is considered synthetically after the completion of the water intake project. Some feasible suggestions on scientific exploitation of water source are put forward to ensure the steady operation of water intake project for a long time.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：P641.8

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本文編號：1597174