| Summary: | 碩士 === 明新科技大學 === 營建工程與管理研究所 === 97 === The land stratum of the southwestern coastal area in Taiwan mostly belongs to the Alluvium plain consists of alluvial soil. Except for slowly sinking because soil structure condensing; however, the excessive exploitation for land had fast enlarged the range of the Land Subsidence. Especially, there are many large-size construction projects, e.g. High Speed Rail, Metro systems, had been accomplished recently. Its impact assessment for the construction should be considered. Therefore, the monitoring for the land subsidence in Taiwan had been proceeded for the past several ten years. But the data integration and fusion was an important issue for the corresponding researches.
The main purpose of this study is to collect and to build a database consisted of leveling, GPS, meteorological and hydrological, seismic, geological, soil and other monitoring information in the Changhua county using a GIS software. And use the spatial analysis and geostatistical functions in GIS to verify the database and to derive the regional trend surface of the land subsidence.
The results indicate that this study will be the standard of qualifications, GPS measurement volume results, with the impact of factors related to statistics and build for the GIS database, through the Geographic Information System spatial analysis functions and display statistical information over the years, these movements help to identify and understand the Changhua Coastal areas of land subsidence varied timing. In addition to integration of the information database related to this formation, but also can be used as pre-disaster prevention and post-disaster reconstruction in accordance with the reference to help deal with disasters brought about by injury.
Key words: Land Subsidence data, GIS, Geostatistics
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