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標題: Application of remotely sensed data to the assessment of terrain factors affecting the Tsao-Ling landslide
作者: Yang, M.D.
Yang, Y.F.
Hsu, S.C.
關鍵字: hazard;gis
Project: Canadian Journal of Remote Sensing
期刊/報告no:: Canadian Journal of Remote Sensing, Volume 30, Issue 4, Page(s) 593-603.
The Chi-Chi earthquake, the most severe natural disaster of the last century in Taiwan, struck the west-central part of the island in the very early morning on 21 September 1999. This serious earthquake changed the landscape of central Taiwan. The strong natural motion triggered thousands of landslides and debris flows in the hills and mountains. Tsao-Ling Lake was formed by massive landslides that blocked Chinshui Creek. Besides geological conditions, terrain factors such as slope, aspect, and vegetation greatly affect the stability of the slopes. To monitor and evaluate the locations and variations of the landslide scars in the Chinshui watershed, remote sensing techniques were applied to provide temporal and spatial information. Airborne and satellite imagery was adopted to help in the collection of terrain information. Aerial photographs and SPOT satellite images were processed to assess the damage level of slide areas and the potential risk of landslide reoccurrence in the watershed of the Tsao-Ling area. The overall affecting scores combining three terrain factors were processed by an aggregation function to produce a synthetic probability map of landslide reoccurrence. The probability of landslide reoccurrence in the Tsao-Ling area can be a reference for decision-makers to efficiently locate areas with high probability of landslide occurrence and create treatment and rehabilitation plans.
ISSN: 0703-8992
Appears in Collections:土木工程學系所

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