Integrations of multiple observations and inversion of subsidence parameters in Choushui River Fluvial Plain of central Taiwan
Abstract
Choushui River Fluvial Plain (CRFP) located in central Taiwan is created by river sediment, which includes fine materials that are relatively compressible. Based on observations from 1970s, the CRFP has threatened by serious pumping-induced land subsidence. Precise geodetic measurements such as GPS, Leveling, and InSAR are useful for observing the land deformation. However their accuracy, temporal and spatial resolution are quite different. Specifically, the Leveling data give the basis of spatially accurate measurements of land subsidence, however the temporal resolution is technically limited. The GPS data provide high temporal observations but relatively low spatial density. Recent advantages on InSAR techniques provide an alternative to Leveling and GPS observations due to the highly spatial density. In this study we use Kriging interpolation technique and the associated geostatistical analysis to integrate spatio-temporal monitoring data with multiple scale and resolution. Base on the results of integrated observations, we employ Terzaghi consolidation theory and the associated groundwater level and compaction monitoring well data to estimate the aquifer subsidence parameters in the CRFP. Our approach brings together the advantages of all the measurement in CRFP, and resolves the detailed land subsidence behaviors and mechanisms. The prediction results of land subsidence with our inverse parameters reproduce well the real observation data.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2012
- Bibcode:
- 2012AGUFM.H31F1176L
- Keywords:
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- 1240 GEODESY AND GRAVITY / Satellite geodesy: results;
- 1295 GEODESY AND GRAVITY / Integrations of techniques;
- 1816 HYDROLOGY / Estimation and forecasting