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水利是农业的命脉,缺水区只有寻找地下水才是解决办法之一。通过对大地电测提供的资料,能增加找水的准确性,电测找水方法很多,主要的方法是测量地层电阻率,通过对岩层电阻率大小的分析,推断地下岩层含水的情况。 (1)岩层电阻率 不同岩层电阻率差别极大,影响的因素是:岩层中所含物质,石英长石为高电阻率、煤铁为低电阻率;岩层的致密程度和含水多少都会影响。地下水位以上岩层含水量在10％内变化时影响大;水位以下主要受岩层孔隙影响;另外水中的含盐
Water conservancy is the lifeblood of agriculture, and water scarcity is only one way to find groundwater. According to the data provided by the geoelectric survey, the accuracy of finding water can be increased. There are many ways to find water by electricity. The main method is to measure the resistivity of the formation, and to infer the water content of the underground rock formation by analyzing the resistivity of the rock formation. (1) The resistivity of rock layers varies greatly with the resistivity of the rock layers. The factors that affect the rock layers are: the substances contained in the rock layers, the quartz feldspar is of high resistivity and the coal and iron are of low resistivity; the density of the rock layers and the water content will all influence. Water level above the groundwater level changes within 10% of the impact of large; below the water level is mainly affected by pore rock; other water salt