岡山洪氾區遙感偵測分析

Gangshan Flood Area Analysis Using Multi-temporal ERS SAR and SPOT Images

呂黎光(Li-Guang Leu) ； 吳仁明(Ming-Ren Wu)

《航測及遙測學刊》 7卷3期 (2002/09) Pp. 1-17

https://doi.org/10.6574/JPRS.2002.7(3).1

摘要

洪水造成海岸地區或低窪地區的淹水，不僅造成居民財產的損失，同時，也威脅到居民生命的安全。洪氾區範圍常採用人工現場勘察界定，但洪氾期間洪水氾濫成災，現場調查工作艱鉅，現場作業人員安全堪慮，調查作業風險甚高，況且，大範圍洪氾區的現場調查作業曠日費時，人力與時間的投入所費不宜。於是，採用遙感偵測洪氾區域的方法，成了男一種快速、有效取得大範團洪氾區域資訊的不錯選擇。本研究遙感偵測洪氾區域乃透過影像資料分析，使用多時影像進行分析比較，可以偵測洪氾區域所在位置及範圍。1994年八月道格颱風過境台灣，造成岡山地區嚴重淹水，蒐集當時衛星影像進行分析，結果與現場有關資料相互比對，顯示淹水位置與範圍十分吻合，證實遙感偵測洪氾可行性甚高，值得進一步研究應用。

關鍵字

洪氾 ； 遙測 ； 道格颱風 ； 影像融合 ； 多時影像

並列摘要

Flood threatens human being lives and assets in the coastal area and land submergence. Monitoring and controlling the extent of flood area, the field survey is laborious and enormously dangerous. Remote sensing technology takes the advantage of safety, economics, and synoptic view to obtain the information of flood water and land submergence quickly. The frequent non-availability of cloud-free multi-spectral data precludes optical remote sensing of flood area, especially during the period of maximum water spread. By virtue of day and night observation and cloud penetration capability, the active microwave data from Synthetic Aperture Rader (SAR) offers a tremendous potential for mapping and monitoring the extent of land submergence. In this study, multi-temporal data included ERS SAR and SPOT MSS images were used to analyze and delineate flood water boundaries of Gangshan during the typhoon Doug pass through Taiwan on August, 1994. From the analysis result with microwave and optical data, satellite images can map flood area easy and manifestly and have a good agreement with field information. This study indicates that remote sensing mapping and analysis of flood area using multi-temporal satellite data is available. The advanced study need carry on and promote it to beneficial applications.

並列關鍵字

Flood ； Remote Sensing ； Typhoon Doug ； Image Fusion ； Multi-temporal Image