控制淡水河河口輸沙的主要因素為潮汐、波浪、河川流量、河口地形及懸浮質及底床質特性等。挖子尾沙嘴灘線逐年變動並有持續溯河延伸及外擴的趨勢，砂嘴內凹的淺灘潟湖則趨淤淺。本年度(104年)計畫之主要工作包含: (1)河口段水理特性分析 及 (2) 河口沙嘴地形之演變及風吹砂性應分析二部分。 在水理特性分析將進行流速觀測以探討河口段漲退潮流的輸沙特性，探討河床底形、流速、流量之關係， 並分析淡水河的水下沙丘阻力及台北港建港對淡水河的效應。在河口地形之演變分析方面, 則進行淡水河口挖仔尾沙嘴及灘線之資料分析，風吹砂的輸砂量及其演化趨勢評估。經由本年度計畫成果, 可深入瞭解淡水河下游底床及砂嘴之改變、淡水河下游於颱洪期及平時之水理特性，及淡水河下游及河口在潮流、風、浪、與河川流量互制下之輸砂現象及其地形變遷趨勢，以供日後臺北港營運及河口治理之參考。;The mechanisms controlling the sediment transport around Danshui river mouth and the surrounding coastalines are tides, waves, river flow, suspended load and bed load. In order to evaluate the sediment capacity and the stability of the Danshui river mouth, the proper evaluation of sediment transport in this region is required. In this study, we will explore the bedforms around Danshui river mouth and the evolution of Waziwei sand spit and aeolian process in an one-year span. The hydraulic data will be continuously collected , and will be used to calibrate the suitable sediment transport equation. The model will be evaluated by either experimental or field studies. The goal of this study is to provide some alternatives to resolve the sediment erosion and accretion problems around Danshui river mouth and the Taipei Harbor.;研究期間：10403~10412
