第二松花江流域（丰满以下）傍河取水对区域水资源的影响分析

发布时间：2018-01-08 21:05

本文关键词：第二松花江流域（丰满以下）傍河取水对区域水资源的影响分析　出处：《吉林大学》2017年硕士论文　论文类型：学位论文

【摘要】：傍河水源地具有水量稳定、水质优良、易集中开采等优点,而傍河取水则是国际上普遍应用的取水方式之一。在论证傍河水源地地下水允许开采量时,必须考虑傍河取水区域的地表水、地下水的水质及水量情况、地下水与地表水的水力联系程度以及傍河取水的环境影响等。本论文以第二松花江流域(丰满以下)为研究区域,以第二松花江干流及饮马河支流沿岸傍河取水适宜性评价工作为基础,建立了研究区的水文地质概念模型和数值模拟模型,反演了区域水文地质参数,完成了模型的识别及验证。基于地下水数值模拟模型,以地下水开采量与地下水位降深的协变关系为基础,综合考虑地下水开采效益和环境影响,分别评价了5个傍河取水适宜区域在不同大气降水保证率(20%、50%、75%、95%)条件下的地下水允许开采量;在此基础上设计了傍河取水适宜区域的地下水开采方案,预报并分析了各开采方案下傍河取水对区域水资源的影响,得到以下主要结论:(1)第二松花江干流地区傍河开采潜力巨大。在5处傍河取水适宜区中,在95%保证率条件下,地下水允许开采量超过2×104m3/d的傍河水源地有4处、超过5×104m3/d的傍河水源地有3处,而地下水允许开采量能够超过10×104m3/d的傍河水源地有1处;(2)现状年条件下,傍河开采适宜区(2)(吉林市乌拉街附近)和适宜区(5)(松原市附近)以河水补给地下水为主;其他各傍河开采适宜区均以地下水补给河水为主,但在降水保证率分别提高到75%以上时,适宜区(1)(吉林市龙潭区附近)地表水与地下水的转化关系发生变化;(3)各适宜区在以允许量进行傍河开采时,对第二松花江流域整体的地下水流场形态影响不大,不改变区域地下水流整体流向,但对各适宜区地下水流场有较为明显的影响;(4)各适宜区在以允许量进行傍河开采时,与保持现状开采强度的条件相比,地下水向地表水的泄流量明显减少,地表水向地下水的补给量增多。当大气降水保证率较低时,傍河开采对各区段地表水径流量的影响程度较轻;当大气降水保证率较高时傍河开采对各区段地表水径流量的影响程度明显增大。
[Abstract]:Wellfields nearby river has water stability, good water quality, easy to focus on the exploitation of the advantages, and the riverside pumping water is one of the widely used. In the near river water groundwater allowable exploitation quantity, must consider the riverside pumping area of surface water, water quality and water conditions of groundwater, hydraulic connection degree groundwater and surface water and water near the river environment. In this paper, the second Songhua River basin (full below) as the study area, the Songhua River along the second main stream and tributaries of Yinma River near the river water suitability evaluation as the foundation, established the simulation model of hydrogeological conceptual model and numerical inversion of the study area, the area the hydrogeological parameters, the completion of the identification and validation of the model. The groundwater numerical simulation model based on the covariant relationship between groundwater exploitation and groundwater level drawdown as the foundation, comprehensive consideration The groundwater exploitation efficiency and environmental impact evaluation, respectively 5 riverside pumping suitable areas in different atmospheric rainfall guaranteed rate (20%, 50%, 75%, 95%) under the condition of groundwater allowable exploitation; on the basis of the design of the riverside pumping for groundwater exploitation scheme of regional, forecast and analysis of the mining scheme near the river water for regional water resources, the main conclusions are as follows: (1) in the second Songhua River area exploitation near the river great potential. In 5 near the river water in the suitable region, 95% guarantee rate under the condition of groundwater allowable withdrawal of more than 2 * 104m3/d wellfields nearby river has 4, more than 5 * 104m3/d wellfields nearby river 3, and allow exploitation of groundwater can be more than 10 * 104m3/d wellfields nearby river 1; (2) present conditions, appropriate exploitation near the river region (2) (Wulajie near Jilin city) and suitable areas (5) (near Songyuan city) to fill the river To the groundwater; the exploitation near the river to the river suitable area groundwater recharge, but rainfall guaranteed rate were increased to 75% or more, suitable region (1) (near the Longtan District of Jilin city) the transformation relationship between surface water and groundwater changes; (3) the suitable area to allow the amount in the near when the little river mining, groundwater flow on the whole second Songhua River basin form, does not change the overall regional groundwater flow, but the influence of suitable area of groundwater flow field has obvious; (4) the suitable area in to allow the amount of exploitation near the river, compared with the present conditions of mining strength remain. Groundwater discharge to reduce surface water, surface water and groundwater recharge of precipitation increased. When the guarantee rate is low, exploitation near the river on the degree of influence of each section of surface water runoff is light; when the precipitation guarantee rate is high The impact of riverside mining on surface water runoff in each section is obviously increased.

【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P641.8;TV213.4

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