本文主要在探討人工潛沒式砂洲在不同碎波位置作用之演變差異，並量化文獻中未確定之向離岸輸砂量及適當之砂洲配置。本試驗乃在國立成功大學水工試驗所之二維波浪水槽進行，在坡度1/20與坡度1/60上進行砂洲演化試驗。文以將無因次累計輸砂率分成向岸傳輸率與離岸傳輸率，試圖找出適當的配置，且進行一個定量的分析。實驗結果指出，史爾茲參數主宰著消失率與向岸傳輸率的大小，且成一正比的關係。而碎波位置的不同，使得在堤上碎波試次之向岸傳輸率大多大於堤後碎波之試次。且當波浪在堤上碎波時，會有一半以上之粒料朝向岸而去。離岸傳輸率則與斜坡坡度有關，坡度愈緩，離岸傳輸率愈低。最後歸納砂洲應置於斜坡坡度小於1/10，在砂洲配置條件0.1 hc/Bc<0.21下有較佳的養灘效果。

　　The objective of this thesis is to investigate the evolutions of sand bar under different wave breaking locations. The experiments are conducted in a glass-side walled wave flume. A series of experiments with different wave conditions and installations of bars are conducted on bottom slopes of 1/20 and 1/60. The total dimensionless accumulative transport rate is divided into onshore and offshore transport rate to determine the proper damping position and installation of sand bar. The results show that the onshore transport rate is affected significantly by Shields parameter. The onshore transport rate is larger as waves break on the bar than as waves break behind the bar. It is found that over 50% volume of sand bar will be transported onshore as wave break on the bar. Additionally, the offshore transport rate is found to be relative to the bottom slope. As the slope is milder, the offshore transport rate is lower. Finally, it is concluded that better benefit can be obtained in beach nourishment under 0.1 hc/Bc<0.21.

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