电阻率测深法在黄河滩区划分淡咸水分界面中的应用效果

The Application Effects in Dividing the Interface of Fresh-saline Water on the Floodplain of the Yellow River by Resistivity Sounding Method

矿化度是评价地下水水质的一个重要指标,结合实例较为系统地介绍应用视电阻率测深法划分地下水矿化度的依据及方法,验证结果表明效果良好。通过对无棣、埕口、沾化、郭局子等地区开展对称四极电阻率测深工作,基本查明指定范围内500 m深度以浅,地下微咸水与半咸水在平面上的分界线,对原水文图划定的边界进行验证和修正。勘查区内大部分测线是根据水文地质图布设的,共布置6条测线、288个点,控制剖面长度88 km,点距为200~400 m,AB/2最大1000 m,整个工作达到预期目的,取得较好的水文地质效果,该研究对沿黄河盐碱化地区将黄河滩区地下淡水作为饮用水提供了借鉴。

The degree of salinity is an important index for evaluating groundwater quality.This paper systematically introduces the basis and method of dividing the degree of salinity of groundwater by the apparent resistivity bathymetry with examples and the verification results show that the effect is good.Based on the symmetrical quadrupole resistivity sounding work carried in Wudi,Tongkou,Zhanhua,Guojuzi and other areas,it is basically found that the specified range is shallow within the depth of 500m,the underground brackish water and brackish water are on the plane,and the boundaries delineated by the original hydrographic map is verified and corrected.Most of the survey lines in the survey area are laid out based on hydrogeological maps,with a total of 6 survey lines arranged,288 points,the length of the control section is 88 km,the point distance is 200~400 meters,and the maximum of AB/2 is 1000 m.The whole work has achieved the expected purpose and this study provides a reference for the use of underground freshwater on the floodplain of the Yellow River as drinking water in salinized areas along the Yellow River.