近年來對海底峽谷的研究逐漸增加，其中包含了探究異重流如何侵蝕出海底峽谷，不過對於聚合型邊界在擠壓抬升後，異重流開始下切出峽谷的過程發展，相較下例子較少。本研究使用水下沙箱進行實驗，模擬聚合型邊界峽谷之演化過程，使用鹽水作為實驗中之異重流，並藉由後方推板擠壓土體以產生地勢抬升。透過調整推板擠壓速度及異重流流量，探索兩變因交互作用下之海底峽谷發展機制。

數位影像分析之結果證實：(1)推板速度愈快，坡面愈傾向發展為安息角坡面，峽谷的形貌更接近筆直狀；(2)在上游地形限制下，若同為單一峽谷，則流量大者下切較深；而當限制較少，流量大者會擴散開，形成複數個較淺之峽谷；(3)峽谷及沖積扇之長度-面積關係與其他現地及實驗資料具有強烈之線性關係，符合哈克定律(Hack's law)。

Resently, researchs on submarine canyons increasing gradually, including how submarine canyons eroded by turbidity currents. However, there are few examples about the process that canyons downcutting by turbidity current after tectonic uplift at convergent margins.

We conduct physical experiments with underwater sandbox to simulate the development of convergent margin canyons in this study, using saturated saline water as density flow, and compressing the soil by push pedal to uplift the terrain, attempt to explore the mechanism of submarine canyon development by controlling two parameters: compressing velocity and density flow discharge.

Results of digital imagine analysis reveal that: (1) With higher compressing velocity, slopes are tend to be the angle of repose, and the shape of canyons are more likely to be straight; (2) If the density flow path is restricted by the variation of upstream terrain, it's tend to cut down single channel, and deeper with lagerer discharge; otherwise, density flow spread wider with lager flowrate and form multiple and shallower canyons; (3)Length-area relationship between canyons and fans in this study are highly correlated to other field and laboratory data, and fit Hack's law.

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