综合物探法在青海省海东市后备水源地勘查中的应用

随着青海省海东市的建立，对水资源的需要亦日益激增，后备水源地寻找调查工作关键且急迫。综合物探法是找水的有效勘查手段，高频大地电磁测深技术（EH4）因具有便携、测深、高效、受地形影响条件小等优点，可以快速查明剖面上电阻率分布特征等情况。利用激电测深探测可以评价低阻异常的可靠性，结合区域地质特征，判断是否具有钻探验证的价值。以青海省湟水流域内湟源茶石浪地区为例，运用“高频大地电磁测深+激电测深”综合物探法找水。EH4发现低阻异常经激电测深查证客观存在，灰岩地层中低阻异常区是本区寻找岩溶裂隙水的目标层位。该方法可作用于干旱缺水处的基岩区找水工作，助力社会经济发展。

Application of comprehensive geophysical prospecting method in exploration of reserved water source in Haidong City,Qinghai Province

With the establishment of Haidong City,Qinghai Province,the demand for water resources is also increasing rapidly.It is critical and urgent to find and investigate the reserve water sources.Comprehensive geophysical method is an effective exploration method for water exploration.High frequency magnetotelluric sounding technology(EH4) can quickly find out the distribution characteristics of resistivity on the profile due to its portability,sounding,high efficiency and small topographic impact.The IP sounding can be used to evaluate the reliability of low resistivity anomaly and determine whether it is of drilling verification value in combination with regional geological characteristics.The comprehensive geophysical prospecting method of "high frequency magnetotelluric sounding+IP sounding" is used to find water in the Huangshui Chashilang area,Huangyuan,Qinghai Province.EH4 found that the low resistivity anomaly objectively exists through IP sounding.The low resistivity anomaly area in limestone stratum is the target horizon for finding karst fissure water in this area.This method can be applied to the water exploration in the bedrock area in the drought and water shortage area,and help the social and economic development.