CAJ | 학술논문

通过系统分析张掖城市湿地水文地质条件,采用DRASTIC法,选取了地下水位埋深、净补给量、含水层介质、土壤介质、地形、包气带介质和渗透系数共七项影响因子对张掖城市湿地城市区地下水防污性进行了评价。结果表明,张掖城市湿地地下水防污性较好地带主要分布在研究区南部新墩镇——二十里铺一带地下水深埋区,水位埋深一般大于10 m,包气带岩性以亚砂土及砂砾卵石为主。进行地下水防污性评价要在充分掌握工作区的地质及水文地质条件基础上,根据实际情况选取评价因子,在对评价因子进行分级量化时,要根据实际情况强调评价因子的相对性。
통과계통분석장액성시습지수문지질조건,채용DRASTIC법,선취료지하수위매심、정보급량、함수층개질、토양개질、지형、포기대개질화삼투계수공칠항영향인자대장액성시습지성시구지하수방오성진행료평개。결과표명,장액성시습지지하수방오성교호지대주요분포재연구구남부신돈진——이십리포일대지하수심매구,수위매심일반대우10 m,포기대암성이아사토급사력란석위주。진행지하수방오성평개요재충분장악공작구적지질급수문지질조건기출상,근거실제정황선취평개인자,재대평개인자진행분급양화시,요근거실제정황강조평개인자적상대성。
The article is based on analysis on evaluation of the soil resistance on wetland groundwater in the urban area of Zhangye,using DRASTIC and taking seven influencing factors including depth of groundwater lever,net recharge,aquifer medium,soil medium,terrain,aeration zone medium and osmotic coefficient to evaluate the pollution of groundwater.The wetland groundwater with the best soil resistance mainly distribute on the southern part of the studied area,20 mile village of Xindun town.The groundwater lever of this distribution is much deeper,usually over 10m.The litho-logical characters of aeration zone are mainly sand loam and gravel.The evaluation of groundwater soil resistance must base on the sufficient geology and hydrogeololgy data.The classification of evaluation factors must base on reality and emphasize the relativity of the factors.