以航空相片分析海岸變遷之應用

The Application of Aerial Photos for Analysis on the Coast Variation

喻新(Hsin Yu) ； 吳至誠(Jee-Cheng Wu) ； 崔國強(Gwo-Chyang Tsuei) ； 徐輝明(Hui-Mi Hsu)

《國立宜蘭大學工程學刊》 1期 (2005/02) Pp. 63-74

https://doi.org/10.6176/BCE.2005.01.15

摘要

海岸變遷為國土保持之重要課題，本研究係利用圖像資料中精度較高之航空相片為基礎先建立民國81年宜蘭蜜月灣海岸之高低潮位等潮位海岸線，並據以與其他年度之實際海岸線作一比較，以決定海岸是否有侵蝕或淤積現象。結果顯示各年度海岸線與81年為基準之海岸線相比較，82年至88年間海岸均呈現稍微後退現象，但比較86年與88年之海岸線變化則顯示微幅突出狀況；若比較潮高尚未校正之各年度海岸線，發現海岸線均與當時的潮高相當，可以說明海岸線在長期並無明顯變化情形。因為海岸具季節性動態變化行為，所以長期定時與野外現地實測可得到更精確之分析結果。

關鍵字

航空相片 ； 海岸變遷

並列摘要

The coast variation is important in the conservation of land. The project analyzed aerial photos, which is more precise among image data, of Honey Moon Beach in Ilan at 1992 to establish coast contour lines of tidal level. The coast variation was discussed based on above comparisons to decide the decrement or increment of the coast land. Although the decrement of coast was found during period between 1993 and 1999, an insignificant increment of coast was recognized by comparing the coast line of 1997 and 1999. The comparisons of coast lines without amendment of the tidal level at various years showed that the coast line was compatible with the tidal level. It was concluded that no significant coast variation was found in the study area. A long term field investigation with finite frequency is helpful for more precise results.

並列關鍵字

Aerial photos ； Coast variation