結論

1. 岩芯X 光攝影結果顯示，海底峽谷峽谷中沈積物以濁流沈積物為主。

2. 粒徑分析結果顯示，沈積物於高屏陸棚和峽谷中傳輸方式有很大的不同。陸 棚主要受海流及潮流影響；峽谷主要受濁流或重力流影響。

3. 高屏溪為西南海域沈積物供應的主要來源，每年為台灣西南海域提供大量沈 積物。其中大部分進入高屏海底峽谷中，少部分堆積於鄰近區域。

4. 本研究中新一期濁流事件發生的主因：

高屏海底峽谷：2005 年高屏溪洪氾事件，龐大的流量挾帶相當多沈積物往峽 谷傳輸並引發濁流，整個峽谷中均可見。

枋寮海底峽谷：2006 年恆春地震事件，引發枋寮海底峽谷上部陸坡沈積物液 化向上噴出，造成濁流堆積。

5. 豪雨沖刷台灣所攜出的沈積物，於高屏海底峽谷之堆積，可厚達 150 公分以 上。

6. 2006 年恆春地震引發之濁流，除順著峽谷往深部亦可能僅有短距離傳輸。

7. 峽谷為沈積物之通道：

長時間尺度來說，峽谷的確幾乎不堆積沈積物。

短時間尺度來說，峽谷中可堆積著相當厚的沈積物

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附錄Ⅰ

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在文檔中 台灣西南海域陸棚及峽谷內沈積物傳輸方式 (頁 58-85)