【作者】 陈春玲；

【导师】 刘保民； 王春晖；

【作者基本信息】 河南理工大学 ， 地质工程（专业学位）， 2021， 硕士

【摘要】 兰考县地处黄河中游,多以农业、工业为主。近年来,随着人口增加、工业经济发展,地下水受到不同程度的污染,水位下降明显,形成大范围降落漏斗,加剧了地下水供、需矛盾。在充分分析兰考县水文地质资料的基础下,通过野外地质调查和采集水样等手段,并采用单一指标评价法和F值评分法对研究区的饮用水水质进行系统评价。然后运用Modflow软件的区域水均衡程序对兰考县浅层地下水资源量进行具体评价,并结合水均衡法对评价结果进行对比分析,取得了如下成果:(1)兰考县地区浅层地下水污染较为严重,主要为铁和锰含量超标。其中,直接可饮用水面积约占研究区总面积的7.99%,Ⅳ类劣质水面积约占研究区总面积的41.77%,Ⅴ类水劣质水面积约占研究区总面积的50.24%,总体水质西部优于东部。(2)采用水均衡法与数值模拟相结合的方法,鉴于采用水均衡法获得的最大可采量偏大,最终采用数值模拟的评价结果:兰考县地区全年的总补给量比总排泄量少560.72×10~4m~3/a,最大可开采量为15062.66×10~4m~3/a。(3)结合研究区水质、水量情况,将浅层地下水开发利用可规划为三个区:可直接饮用地下水区(A区)、适当处理可饮用地下水区(B区)和不宜饮用地下水区(C区),对兰考县的发展起到一定的借鉴指导作用。更多还原

【Abstract】 Lankao County is located in the middle reaches of the Yellow River,mostly agriculture and industry.In recent years,with the increase in population and the development of industrial economy,groundwater has been polluted to varying degrees,and the water level has dropped significantly,forming a large-scale falling funnel,which has aggravated the contradiction between the supply and demand of groundwater.On the basis of fully analyzing the hydrogeological data of Lankao County,the drinking water quality of the study area was systematically evaluated by means of field geological survey and water sampling,and using single index evaluation method and F-value scoring method.Then use the regional water balance program of Modflow software to specifically evaluate the amount of shallow groundwater resources in Lankao County,and compare and analyze the evaluation results with the water balance method.The following results have been achieved:(1)The pollution of shallow groundwater in Lankao County is relatively serious,mainly due to excessive iron and manganese content.Among them,the area of direct potable water accounts for about 7.99%of the total area of the study area,the area of Class IV poor quality water accounts for about 41.77%of the total area of the study area,and the area of Class V poor quality water accounts for about 50.24%of the total area of the study area.The overall water quality The west is better than the east.(2)The method of combining water balance method and numerical simulation is adopted.In view of the fact that the maximum recoverable amount obtained by the water balance method is too large,the evaluation result of numerical simulation is finally adopted:the total replenishment volume in Lankao County area is more than the total discharge volume in the whole year.Less than 560.72×10~4m~3/a,the maximum mining capacity is 15062.66×10~4m~3/a.(3)Combining the water quality and quantity of the study area,the shallow groundwater development and utilization can be planned into three areas:directly potable groundwater area(A area),properly treated potable groundwater area(B area)and unsuitable for drinking groundwater area(C area),play a role of reference and guidance for the development of Lankao County.更多还原