Enhancement and Application of Wave Hindcasting Model (Ⅱ)

瀏覽統計 Email 通知 RSS Feed

簡歷

基本資料

Project title

Code/計畫編號

NSC95-2623-7006-006-D

Translated Name/計畫中文名

數值海浪預報之精進及應用(Ⅱ)

Project Coordinator/計畫主持人

Tai-Wen Hsu

Funding Organization/主管機關

National Science and Technology Center for Disaster Reduction

Co-Investigator(s)/共同執行人

高家俊

Department/Unit

Department of Hydraulic and Ocean Engineering,NCKU

Website

https://www.grb.gov.tw/search/planDetail?id=1175624

Year

2006

Start date/計畫起

01-01-2006

Expected Completion/計畫迄

31-12-2006

Bugetid/研究經費

716千元

ResearchField/研究領域

大氣科學

受到全球科技化的影響，海軍設備的快速發展，軍事戰備導向高科技、電子化的應用，實施各類型海上作戰任務時，海戰區域的範圍甚大，海戰環境的影響需要精確的評估與預測，故大氣環境與風浪的預測應達到作業化的精確預估，以減低軍事行動可能發生的不確定性。本計畫共分三年度進行，本年度為第二年度，計畫重點為建立模式預報流程，依據風浪模式之適用性，進行參數最佳化的調整，在計算上縮小數值網格，進行台灣環島局部海域之風浪預報，並利用資料同化系統以增強模式預報能力。根據上一年度執行之經驗，修正模式運算效率與執行的流程，並對現有電腦設備進行最佳化調整。 Owing to the recent high technology developments, the naval battle region is spreading quickly and widely to reach the goal of electricity, accuracy and high speed. Therefore, in order to prevent the warfare mistakes, it is desirable to estimate accurately waves and currents in the ocean. In the present study, a numerical wave model is developed for the wind wave simulation in the far-sea and nearshore regions. The results show that the prediction of WAM/SWAN are better than other wave models. The nested grids is calculating the coarser grids by WAM, and calculating the finer grids by SWAN. WAM uses an explicit first-order accurate upwind scheme in the geographical space. Therefore, the shorter time-step must be chosen to maintain stability. Because of the SWAN code using a fully implicit upwind scheme in geographic space the longer time-step could be adopted. In the second year, using both simulated results and the observational data, it is intended to create a data assimilation procedure that will be used to increase the accuracy of the forcast of the wind wave model. In the last year, an efficient operational procedure for the forecast of the wind wave model will be demonstrated/established. The finer grids in the numerical simulation will particularly be used to enhance the ability of the forcast system. The final objective of this project will be demonstrated by integrating all the different aspects during the last year of the investigation.

Keyword(s)

風浪模式
資料同化
風浪預報
wind wave model
data assimilation
forecast wind wave

DSpace CRIS

Enhancement and Application of Wave Hindcasting Model (Ⅱ)

基本資料

Description