摘要
都兰县地处柴达木盆地,为高原大陆性气候,以干旱为主要特点,自然景观为干旱荒漠,主要土类为盐化荒漠土和石膏荒漠土。随着矿产资源与农业经济的飞速发展,对水资源的需求愈发突出,为此开展柴达木盆地水文地质调查工作,其中地球物理勘探的目的是探查富水区及流域剖面上第四系含水层的水文地质结构和空间变化特征。主要确定第四系含水介质的岩性、厚度、埋藏深度及基底形态。电阻率测深法是地下水勘探中重要的技术手段,本文介绍了其中的对称四极测深法在柴达木盆地地下水调查中的应用,在山前地下水埋深较浅地区,通过向地下供电,建立人工电场,测量电场地下介质的分布。所取得野外实测数据是地下地质构造体分布及电性特征的综合反映,消除或压制这些干扰因素的影响,最大程度得到反映地电断面真实信息的信号。在定性分析的基础上进行定量反演计算剖面电性结构特征,划分含水层,确定基岩面,最后取得了良好的应用效果。
Dulan Country is located in the Qaidam Basin,which is the continental climate of the plateau and the main features is drought. The natural landscape is arid desert,and the main soil is salinized desert soil and gypsum desert soil. With the rapid development of mineral resources and agricultural economy,the demand for water resources is becoming more and more prominent,to this end,the hydrogeological investigation work of Qaidam Basin is carried out. The purpose of geophysical exploration is to explore the hydrogeological structure and spatial variation characteristics of the Quaternary aquifer in the rich and regional watersheds. The lithology,thickness,burial depth and basement morphology of the Quaternary aquifer are mainly determined. The resistivity sounding method is an important technical means in groundwater exploration. This paper introduces the application of the symmetrical quadrupole sounding method in the groundwater survey of Qaidam Basin. In the shallow groundwater field,by supplying electric for underground can establish man-made electric field and measure the distribution of underground media in electric field. The obtained data is the comprehensive reflection of the distribution and electrical characteristics of the underground geological structure,the elimination or suppression of the influence of these disturbances can get the signal of the true information of the electrical section at the largest degree. On the basis of qualitative analysis,the quantitative structure of the profile is calculated by quantitative inversion,the aquifer is divided,the bedrock surface is determined,and finally the good application effect is achieved.
出处
《地下水》
2017年第4期13-15,共3页
Ground water
基金
[基金项目]东昆仑铜镍多金属资源基地调查(121201011000150005)
关键词
电阻率测深
地下水
对称四极
resistivity sounding
groundwater
the symmetrical quadrupole sounding method
