地面核磁共振-垂向电测深组合找水模式

地面核磁共振方法具有直接找水、提供水文地质参数、受地形影响小、垂向分辨率高、经济快速等优点,但它同时也具有易受电磁噪声干扰、横向分辨精度低、勘探深度小等缺点.垂向电测深方法具有技术成熟、不易受电磁噪声干扰、勘探深度大、横向分辨率高等优点,但它同时也具有反演解释存在多解性、定量解释不足、垂向分辨率低等缺点.通过比较地面核磁共振方法与垂向电测深方法的优缺点得知,2种找水方法具有优势互补的特点,合理配合使用上述2种找水方法,可形成地面核磁共振-垂向电测深组合找水模式.该组合找水模式在找水实践工作中的有效性已得到充分验证.

Model of Joint SNMR and VES for Detecting Groundwater

Surface nuclear magnetic resonance(SNMR) is resisting characterized by directly detecting groundwater,providing hydrological parameters,resisting influence of landforms,high vertical resolving power.It is also economical and efficient.However,it is considered that it is not excessively sensitive to electromagnetic wave,and does not possess enough transverse resolving power and depth of detecting.In contrast vertical electric sounding(VES) is a mature technology,with resisteace to the influence of electromagnetic waves,enough depth of detecting,high transverse resolving power.However,it may produce multi-results of invesion,imprecise interpretation results and insufficient vertical resolving power.The comparison of the characteristics of SNMR with VES,shows that two methods can produce better geologic results when working together.Hence,a SNMR-VES detection groundwater work model is formed.The validity of combined work model is demonstrated by groundwater detecting examples.