海岸侵蝕等敏感地區週邊水域水動力條件極為複雜，其波浪場與流場等水動力特性在時間上是非定常、空間上為非均勻，單點式觀測之傳統水文技術進行觀測獲得的片面與離散資訊，難以掌握近岸水動力的連續時空特徵。移動式岸基同調微波雷達，可機動性擷取具時空連續性之海表面流場與波浪場等資訊，且觀測成本與維護作業風險較低，是具有高度應用潛力的近海水文監測技術。 本計畫以水利署第一河川局所轄宜蘭地區侵蝕現象顯著之區域為對象，利用移動式岸基同調微波雷達進行周邊海域近岸流場與波浪場的觀測與實驗。計畫目的在於以現場漂流浮標實驗數據探討與評估同調性微波雷達的功能表現及其適用性；另一方面，本計畫將獲得各種天候條件下侵蝕海岸週邊海域潮流、海流流場特性，據此分析近岸水動力所受人工結構物等之影響，冀以藉新的水文技術提升海堤與海岸防護設計。;The hydrodynamics in the vicinity of eroding coasts are extremely complicated due to the nearshore factors of wave radiation stress, bottom friction, stratification instability and artificial structure interaction with current and waves. Traditional methods of single fixed-point measurement could not satisfy the needs of complete current and wave mapping on heterogeneous and non-stationary fields. Recent development of the Doppler based coherent microwave radar has great potential for the nearshore hydrodynamics mapping in terms of its capability of temporal-spatial domain monitoring and relatively lower cost. The aim of present project is to evaluate the performance of coherent radar on nearshore current field and wave field mapping. A NCU self-develop system will be implemented at Yi-lan coast under various weather conditions. Field campaigns using drifters will be carried out synchronizely to provide in-situ data for validation and comparative study. The observation current fields will be used to investigate the effects of breakwaters to current fields with the hope to advance the realization of nearshore hydrodynamics with high resolution.;研究期間：10401~10412
