應用遙測於濁水溪口海岸地區土地覆蓋變遷分析

Remote Sensing Analyses for the Land-cover Changes in the Coastal Zone of the Choshui Estuary

本研究以不同年份之衛星影像為材料，配合航空照片及地面調查資料進行影像變遷分析，以瞭解濁水溪口地區之變遷情況。主要以1993／12／08、1996／10／18、1998／11／12與2001／10／23等4幅SPOT衛星影像，採用分類後比較法進行定量變遷分析。由1993年至2001年影像變遷分析結果顯示濁水溪口海岸地區於該8年期間，土地覆蓋之變化相當劇烈，主要為開發沿海工業區，於海岸淺水域大量抽砂造地，使陸域朝海擴張；河口海埔地遭濫墾闢設為魚塭，引入海水進行養殖。工業區開發與魚塭闢設改變了河口海岸地區之地形、景觀及生態環境，而颱風挾帶豪雨沖刷亦造成濱海地區地形之劇變。 Remote sensing images taken by French SPOT satellites 1 and 2, available aerial photos and maps, and our field investigation, showed that there were great changes in land-cover in the coastal zone of the Choshui Estuary from 1993 to 2001. Many of the shallow coastal water areas were filled up, the land areas were expanded, and industrial parks were established. Illegal fishponds were constructed for marine fish cultures in many parts of the coastal zone. The above industrial and fish culture developments have modified the terrain, landscape and environments. Also, washes of typhoons altered the surface of the beach areas.