花蓮地區九岸溪集水區崩塌地變遷之衛星影像分析研究

Landslide Interpretation by Using Satellite Image Processing System for Chiu-An Watershed in Hualien Country at Eastern Taiwan

王宣惠(S.H. Wang) ； 蔡光榮(K.J. Tsai) ； 陳昆廷(K.T. Chen) ； 謝正倫(C.L. Shieh)

《鑛冶：中國鑛冶工程學會會刊》 53卷1期 (2009/03) Pp. 102-108

https://doi.org/10.30069/MM.200903_53(1).0009

摘要

九岸溪發源於台灣東部海岸山脈，屬花蓮縣秀姑巒溪之東岸支流，每逢颱風豪雨過後，常導致上游集水區發生土砂災害，危及下游居民生命與財產安全甚鉅。有鑑於此，本研究乃蒐集九岸溪2005年與2007年之SPOT4衛星影像先進行集水區內之崩塌地判釋，再輔以航空照片予以作前後比對影像及其崩塌地形與地貌之變遷分析，同時利用數位地形資料劃定崩塌地區域範圍與估算崩塌面積，最後整合GIS/RS技術估算地文環境變遷前後期之崩塌地面積變異特性，有效估算花蓮九岸溪集水區內之崩塌地面積，據以提供花蓮縣政府等相關單位研擬九岸溪崩塌地治理方案之參考依據。

關鍵字

土砂災害 ； 地理資訊系統 ； 遙感探測系統 ； 影像判釋

並列摘要

Chiu-An River with its origin in the Eastern Taiwan Mountains is one of the eastern Hsiukuluan River tributaries in Hualien County. Often typhoon and heavy rain have caused Ji-Shui landslides in the upstream watershed area that endanger lives and damage properties of downstream residents. For this important study, we performed the following tasks: (1) collected 2005 and 2007 SPOT4 satellite images in Chiu-An River and interpreted the landslide morphological transformation of the watershed area; (2) used aerial photographs to further analyze the morphological transformation; (3) used the digitized terrain data to delineate the scope and area of collapse; and (4) used integrated GIS / RS technologies to evaluate the characteristics variation of collapsed area and thereby, more accurately estimate the collapsed area of Ji-Sui landslides. Results are helpful for Hualien county government and other related units to effectively manage and contain the landslide and the scope of landslide damages.

並列關鍵字

slope failures ； GIS ； RS ； image interpretation