抽水灌溉对宝鸡地电阻率观测的影响

Effect of Pumping and Irrigation on Geo-resistivity Observation in Baoji

在陕西省宝鸡台地电阻率测区内进行了短期的人工抽水和灌溉实验,并对测区内大面积、长期抽水和灌溉活动对该台地电阻率观测的影响进行了研究。结果显示短期、局部范围的抽水活动对地电阻率观测没有明显影响;而持续性的大量抽水、灌溉活动明显影响了地电阻率观测结果。讨论了这种现象的可能原因。此结果为地震监测、预报中地电阻率观测资料的有效应用提供了参考依据。

A experiment for effect of pumping and irrigation in short-term to geo-resistivity observation in the observation site of Baoji seismic station,Shaanxi province,was done,and the effect from pumping and irrigation in a large range with long-term around Baoji observation site was researched also.The result shows that pumping and irrigation in a small range with short-term has no noticeable influence on the geo-resistivity observation,but the one in a large range with long-term has significant effect on the observation.The possible reason of this phenomenon is discussed.The result present a reference for estimating influence of groundwater on geo-resistivity observation in earthquake prediction.