【摘要】 地下水物探方法在复杂城市环境中受电磁干扰、空间限制及高碳排放影响。为研究天然电场选频法在地下水勘探中的场地适用性、异常成因及观测极距的影响，文章以湖南科技大学某水井为研究对象，开展二维理论模拟分析，并进行不同电极距的现场测试。结果表明，天然电场选频法的异常主要为静态效应所致，电极距增大使浅部异常体分辨率下降。天然电场选频法能适应城镇等狭窄的施工环境，同时具有低碳环保、操作简便、效率高的优势。更多还原

【Abstract】 Groundwater geophysical prospecting methods are significantly influenced by electromagnetic interference, spatial limitations, and high carbon emissions in complex urban environments. To elucidate the site applicability, anomaly causes, and the influence of observation electrode distance of the telluric electrical field frequency selection method in groundwater exploration, this paper takes a well located at Hunan University of Science and Technology as the research subject, conducts two-dimensional theoretical simulation analysis alongside field tests with varying electrode distances. The results indicate that the observed anomalies using the telluric electrical field frequency selection method are primarily attributed to static effects. The resolution for detecting shallow anomalous bodies diminishes as electrode distance increases. The telluric electrical field frequency selection method is adaptable to narrow construction environments such as urban towns, while offering advantages including low carbon emissions, environmental friendliness, ease of operation, and high efficiency.更多还原