污灌场地物探-钻探-便携式仪器组合调查方法应用实例

A Case Study of the Application Combined Method in Sewage Irrigation Site: Geophysical Exploration,Drilling,and Portable Instruments

在冀中平原某污灌场地,探索性地开展了高密度电法、钻探调查、便携式仪器现场测试的组合调查方法应用实例研究。根据调查目的和要求,选取典型地段,采用该组合方法土壤与地下水污染调查。完善了场地的水文地质基础资料,编制了综合信息柱状图,刻画了浅部含水层结构;查清了污水渠及灌溉对周边土层与地下水影响,影响范围在侧向上不少于80m,垂向上不少于13m,且已经影响到浅部地下水。在高电导率污水灌溉的区域,采用组合方法有效、快捷。高密度电法、便携式仪器、钻探取样送检各种手段互相促进,互为证据,提高调查结果的可信性。

In a sewage irrigation site in the center of Hebei Plain, a combined method is taken into investigation as a case study. The method is combined with high-density electric method, drilling, and portable instruments. According to the requirement and limits, a typical field is selected to carry out soil and groundwater investigation by combined method. After investigation, basic hydrogeolog-ical information of the site is improved, comprehensive information bar chart is compiled, and aquifer structure is depicted well. And what is more, the impact scope of the sewage in nearby soil and groundwater is checked out. The scope is no less than 80 m horizon tally and 13m vertically which shows sewage has already influenced shallow groundwater. Using combined method in high-conductiv-ity sewage irrigation site proved to be effective, quick and convenient. The component methods, such as electric method, drilling and sampling, lab analysis, and portable instruments, are mutual complement and reciprocally evidence, which improves the credibility of the survey results.