本文以試驗室研究之方式探討成功筐網應用於近岸地區促淤之成效，將此成果作為現地應用之參考。
成功筐網為一圓柱型網狀結構物，此結構物可使波浪因碰撞和摩擦而消能，並使通過的波浪在結構物後方產生明顯之渦流，且此種紊流流場將使波浪能量進一步減衰。文中所探討之成功筐網是由數十個圓柱型筐網組成一透水性矩型塊體，將其架設於碎波帶之前使波浪消能後才傳遞至近岸。整體而言，能量較弱之波浪其驅動底床泥砂之能力較差，故架設成功筐網後底床侵蝕之現象較不易發生且淤積現象較容易出現。
本文針對成功筐網消能及促淤之特性設計一系列試驗，企圖找出最經濟且最有效率之成功筐網設置方式。文中將在兩種不同海灘型態下，對筐網高度Hp，筐網長度Lp，設置高度ds等參數進行探討。根據試驗觀察及Sunamura&Horikawa(1974)之經驗公式與Baldock(2010)之內文所述，本文所研究的兩種海灘型態當中，其中一種為侵蝕型海灘(erosive beach)，另一種則是中間型海灘(intermediate beach)。成功筐網在不同海灘型態下所產生之成效有些許差別。
本文考慮二維之波浪流場變化及底床演變情形，以各試驗底床地形之相對淤積量，底床演變特徵位置與規模，及波浪消能效果為分析探討之重點。

This paper presents the results of series experiments which study on Cheng-Kung Porous Basket applying to promote sand accretion on the beach. The results of the series experiments will be consider as an advance information for site engineering of CKPB.
Cheng-Kung Porous Basket is a kind of cylindrical porous structure which could induce wave dissipation by the effect of friction and collision. The obvious eddying phenomona occurred at exiting direction when wave propagating over the structure. The eddying flow is going to reduce the wave energy.
The the porous rectangular body of Cheng-Kung Porous Basket is consist by a lot of cylindrical basket. The structure was set at offshore direction of surf zone. The incident waves must passed through the structure to reach near coastal area. In general, the wave with less energy was hard to drive the bed material. The probability of occurring erosive phenomena decreased when CKPB was already set, and the probability of occurring accretive phenomena was increased.
The series experiment of this paper is designed for the discovery of most economical and efficient method of structure setting. The experiment was conduct for two different beach evolution type. The relationship between structure setting parameter and beach evolution will be studied in this paper. The beach evolution type was defined through the empirical formula of Sunamura&Horikawa(1974) and the content of Baldock(2010). One of the beach evolution type is erosive beach, another type is intermediate beach. The effect of CKPB is different in different beach evolution type.
The experimental flow field and the topography profile were considered as a two-dimension situation. The analysis focused on the relative accretive value of beach profile, the characteristic location and size of beach evolution, and the result of wave dissipation.

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