DETERMINATION OF GROUNDWATER TABLE BY INVERSE MODELING WITH DAMPED LEAST-SQUARES AT BEKASAP FIELD RIAU
Groundwater is a primary water source for the sustainability of human life. Groundwater is located in the subsurface area in the saturated zone called aquifer. The presence of an aquifer can be identified through a geophysical survey by determining the upper boundary of the aquifer called the gro...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/42965 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Groundwater is a primary water source for the sustainability of human life.
Groundwater is located in the subsurface area in the saturated zone called
aquifer. The presence of an aquifer can be identified through a geophysical
survey by determining the upper boundary of the aquifer called the groundwater
table. DC Resistivity geoelectrical method is one of the geophysical
measurements which is effective to be used to determine the depth of the water
table. Measurements were performed using the Wenner electrode configuration
in Bekasap to attain preferable depth resolution. The process of
measurement data modelling yields rms error. In order to reduce the rms error,
damped least-squares is applied into the inversion solution. This process
will improve the model parameter iteratively until the minimum rms error is
obtained. The damped least-squares modeling was tested on three synthetic
models which have resistivity variation. Furthermore, the damped leastsquares
was applied on the observed data at Bekasap. From the processing
and modeling using damped least-squares, the depth of the groundwater table
and aquifer can be obtained. |
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