摘要: This report adopts the time-staggered explicit (TSE) and the alternating-direction implicit (ADI) finite difference techniques to simulate the storm surge on the vertically integrated hydrodynamic equations of continuity and momen... 展开 This report adopts the time-staggered explicit (TSE) and the alternating-direction implicit (ADI) finite difference techniques to simulate the storm surge on the vertically integrated hydrodynamic equations of continuity and momentum. The unique feature of the present models lies in their treatment of water-land interfaces as moving boundaries (MB). In the present models, the advancing and retreating of the surge wave over the low-lying dry land and the propagation of the water-land interface are dealt with on the basis of physical and mathematical principles. The complete set of governing equations is applied to the water regime as well as the dry land as soon as it is flooded. Numerical experiments indicate that the MB models predict as much as 30% lower surge level at the coastline than the fixed-boundary (FB) models when the adjacent inland area has a mild slope and the wind is very strong. The MB models yield better agreement with recorded surge than the FB models, which consistently overpredict the surge elevations. (ERA citation 06:017431) 收起