摘要
应用电测深、激电测深和瞬变电磁测深方法,结合区域水文地质条件,在被前人判定为贫水或无水区的河西走廊祁连山山前缺水区开展了综合电法勘查找水工作,分别发现了分布面积广的第四系大厚度粘土层深部和第三系泥岩深部存在高阻含水体。经20余眼水文地质勘探孔验证,单井涌水量大于2 000 m3/d,矿化度小于1.0 g/L,布井成功率达95%以上。不但彻底解决了这一地区人饮水源的问题,而且为今后类似地区的找水工作积累了经验,具有显著的社会效益。
Applying the integrated electrical method comprising such means as vertical electric sounding, sounding of induced polarization and transient electromagnetic sounding, in combination with the regional hydrogeological conditions, the authors conducted underground water exploration in the piedmont water-deficient region of the Qilian Mountains in Hexi corridor, which had been regarded as water-poor or no water area by previous workers. As a result, extensive water-bearing layers characterized by high apparent resistivity were found in great thickness of deep Quaternary clay sediments and Tertiary mudstone beds. More than twenty hydrogeological drill holes confirm that inflow of water per well is greater than 2 000 cubic meter per day, mineralization of water is less than 1.0 gram per liter and success rate for arrangement of wells is higher than 95 per cent. The work conducted by the authors has not only completely solved the problem of drinking water sources in this region but also accumulated a wealth of experience for underground water exploration in similar regions. It yields notable social benefits and also has a certain research value.
出处
《物探与化探》
CAS
CSCD
2006年第1期41-44,共4页
Geophysical and Geochemical Exploration
基金
甘肃省地矿局地质勘查项目基金资助(2003Y2-1)
关键词
综合电法
水文地质
地下水
河西走廊
integrated electrical method
hydrogeology
underground water
Hexi Corridor
