波浪溯升過程輸沙之實驗研究

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Title:	波浪溯升過程輸沙之實驗研究
Other Titles:	A Laboratory Study on the Sediment Transport during the Processes of Wave Run-up
Authors:	李俊生;林意楨
Contributors:	淡江大學水資源及環境工程學系
Keywords:	輸砂;波浪溯升;逆坡;Sediment Transport;Wave Run Up;Adverse Slope
Date:	1998-11
Issue Date:	2010-01-11 16:56:36 (UTC+8)
Publisher:	臺北市：中國土木水利工程學會
Abstract:	在海岸變遷之波浪溯升過程中水流是沿逆坡往上流動的，而一般對逆坡坡度之輸沙特性研究之文獻卻不多見，有鑑於此，本研究乃以沈滓中值粒徑D/sub 50/=0.207 mm的天然沙針對不同流量與不同逆坡坡度進行一系列之渠槽實驗。本研究之結果可推論顆粒雷諾數Re與坡度S對於逆坡輸沙量的大小影響十分輕微並將求得之逆向輸沙模式與Schoklitsch (1934、1950)、Bagnold (1966)、何智武(1983)、黃宏斌(1992)與趙申皓(1997)等順向模式比較。在所有模式中因為只有Bagnold (1966)以能量觀點來估算輸沙量，因此該模式在逆坡情形下較合適。由本實驗之結果亦與Bagnold (1966)模式較為接近。 During the wave run-up period, the water flow is going up along an adverse slope. The study on the sediment transport along an adverse slope was rare. From a series of flume tests, this study is mainly to derive a sediment movement equation suitable for the adverse slope case. The sands in the flume tests was fine sand (D/sub 50/= 0.207 mm) with different adverse slope and flow discharge. According to our results the particle Reynolds number Re and slope S have very little influences on the sediment discharge. The experimental results are compared with Schoklitsch's (1934,1950), Bagnold's (1996), Ho's(1983), Huang's (1992) and Chau's (1997). In all of these models, only Bagnold's model is derive from the energy concept, therefore Bagnold's (1966) model are much resamble to the results of this study.
Relation:	第二十屆海洋工程研討會論文集=Proceedings of the 20th Ocean Engineering Conference in Taiwan, R.O.C.，頁523-530
Appears in Collections:	[Graduate Institute & Department of Water Resources and Environmental Engineering] Proceeding

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