本研究為探討桃園縣觀塘工業港興建對地形變化之影響，用丹麥水力研究所發展之MIKE21模式及美國陸軍兵團發展之Genesis模式分別來計算桃園海岸之波浪場，海流場，輸砂量，其所造成海底底床變化，及模擬桃園海岸輸砂量及海岸線之變化，並模擬桃園工業港之建立後，其海底地形，海岸線之變化及其影響。 由計算結果顯示;本水域之海底地形變化主要為風，波浪及海流等動力所造成，由於本水域以冬之東北季風主導本水域之輸砂亦以在大潭以北水域之海底底床之侵於活動，較為頻繁。 在海岸線變化而言，本水域之海岸線如無海港存在，海岸線之每年變化僅5至30公尺而已，算是相當安定的海岸。在港灣興建後，本水域均形成北防波堤海岸為淤積，防波堤海岸線向外海推進，南防波堤海岸為侵蝕，海岸線向內陸退縮，永安漁港海岸之侵淤均大幅大於工業港之海岸。尤其工業港之北堤海岸向外海推進距離，是相當小的，受影響的海岸線距離是相當短的。如能工業港南堤海岸作海岸護堤工，則可減緩南堤海岸之侵有蝕。如此工業港之興建對海岸線的影響即可減至最低。又因工業港之北防波堤之底床侵淤活動劇烈，要防止堤底掏空的作用產生之防護措施是要被考慮的。永安漁港海岸之侵淤防護措施更應加速進行，因永安漁港目前已完成約2.5年，現堤已可發現其被明顯的侵淤現象。
The sea bottom and shoreline variation that caused by an industry harbor may be built up at Tao-Yuan., northwest coast of Taiwan, are simulated by the MIKE21 and Genesis Models respectively. The wave field, the current field and the sediment transport field are established by Mike21 Model. The shoreline variation and coastal sediment transport are established by Genesis Model. Wind, wave and tidal current are the forces to induce the sediment transport, the winter wind and waves are the predominate forces in this area. The simulation results showed that if no any harbor in this coast the shoreline variation will less than 30m/year. if the Uon-An fish harbor and Industrial harbor are built up, their northern breakwater shorelines will be deposited, the shoreline is move toward offshore, southern breakwater shorelines will be eroded, the shoreline is moving toward inland. There are a greater erosion and deposition activity in Uon-An fish Harbor than Industrial harbor. Hence, the shoreline protection in the industrial southern breakwater coasts, to prevent coastal erosion is necessary, the erosion along the northern breakwater is serious, the plan to protect the breakwater is also need. The job to prevent harbor deposition and shoreline erosion are urgently be considered, caused Uon-An Fished harbor have already been built up about two and half years, and it appeared that have been serious harbor deposition and shoreline erosion now, from the field observation data.
