吉林省乾安县水文地质特征分析及地下水资源评价

Analysis of hydrogeological characteristics and evaluation of groundwater resources in Qian an County,Jilin Province

吉林省乾安县位于松嫩低平原中央凹陷带,受继承性沉降运动影响,白垩纪晚期以后,在断裂构造的基底上沉积了新近系的弱胶结地层和第四系松散堆积物,为地下水赋存提供了有利条件。全县主要取水水源为地下水,局部地区(县中心)地下水受集中开采影响,形成地下水位降落漏斗,导致地下水质受到污染。为进一步查明该区地下水赋存,分布以及水质变化规律,本文对该区水文地质特征进行全面分析,进而对地下水资源进行了评价,研究结果可为地下水合理开发利用提供依据。

Qian an County of Jilin Province is located in the central depression of Songnen low plain.Affected by inherited subsidence movement,Neogene weakly cemented strata and Quaternary loose deposits were deposited on the basement of fault structure after the late Cretaceous,which provided favorable conditions for groundwater occurrence.The main water source of the county is groundwater;groundwater in some area(County Center)is affected by centralized exploitation,forming a groundwater level drop funnel,resulting in groundwater quality pollution.In order to further find out the occurrence,distribution and water quality change law of groundwater in this area.In this paper,the hydrogeological characteristics of the area are analyzed in detail,and then the groundwater resources are evaluated.The research results can provide a basis for the rational development and utilization of groundwater.