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利用高密度电法研究海水入侵是一种简单、高效的方法,但目前在国内外应用较少。该方法依据水中Cl-浓度增加视电阻率降低的地球物理前提,在莱州湾地区不同地质条件区域,选定典型剖面进行测试,确定了Cl-达到250 mg/L时的视电阻率特征值。基于以上条件,在莱州湾地区布设16条高密度电法剖面,成功的划定了莱州湾地区海水入侵界面,说明高密度电法可作为检测海水入侵的方法之一,为环评、灾害治理等提供技术支持。
Using high-density electrical method to study seawater intrusion is a simple and efficient method, but it is rarely used at home and abroad. Based on the geophysical preconditions of decreasing the apparent resistivity with the increase of Cl- concentration in water, the method was used to select the typical sections in different geological conditions in the Laizhou Bay area to determine the apparent resistivity values when Cl- reached 250 mg / L. Based on the above conditions, 16 high-density electrical profiles were laid in the Laizhou Bay area and successfully delineated the sea-water interface of the Laizhou Bay area, indicating that the high-density electric method can be used as one of the methods for detecting seawater intrusion. provide technical support.