| Summary: | 碩士 === 國立中央大學 === 地球物理學系 === 84 === Three methods including shallow controlled-source
audiofrequency magnetotelluric method (CSAMT), direct-current
resistivity method (DC) and shallow seismic reflection method
were applied together or individually to investigate the Hu-kou
landslide, Li-Tau mountain strata and groundwater and Chelungpu
fault. The following conclusions were derived : 1. Using
conventional DC method with one dimensional data processing can
obtain a good interpretation in an area with drastic variation
in lateral resistivities. If we use two dimensional data
processing, a better result could be obtained. The
characteristics of Hu-kou landslide were interpreted correctly
with a two dimensional model. This two-dimensional model can
reflect more landslide features than one dimensional results
done by others. 2. EH-4 method has an advantage of rapid and
convenient prospecting in the field. It is very suitable for
investigating groundwater and geologic structures within a
depth range of several hundred meters. Fault detecting at
Chelungpu revealed that the EH-4 method is reliable in fault
investigation. 3. Pole-Pole array method could be prospected
rapidly in the field. It is suitable for studying shallow
strata structures. 4. The Pole-Pole method or EH-4 method has
their own limitations in the depth of prospecting. If we
combined them, they are complementary to each other. For
instance, the Pole-Pole method can give the shallow subsurface
information whereas the EH-4 method can give that of a deeper
one. In the study at Li-Tau mountain, it revealed that those
two methods were complementary in detecting the groundwater.
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