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Research on Numerical Forecast Modeling of Storm Surge and Floodplain and Its Application

Author: XuYaNan
Tutor: LiDaMing
School: Tianjin University
Course: Hydraulics and River Dynamics
Keywords: Storm surge Floodplain ADI Wind stress Wave radiation stresses
CLC: P731.23
Type: Master's thesis
Year: 2008
Downloads: 170
Quote: 2
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Abstract


The storm surge is one of the world's marine disasters , one of the most serious disasters threaten the safety of human life and property . China has a long coastline and vast waters provide objective favorable conditions for economic development , but being a tropical cyclone attacks annually summer and autumn , spring and winter cold wave strong winds , causing China to become a storm surge hazard -prone area . The study storm surge generation , development and on the coastline of the invasion of the physical mechanisms has important theoretical significance , especially storm surge forecasting method has immediate practical significance . In this paper, Tianjin coastline and offshore features based on two-dimensional the temperate storm surge mathematical model , taking into account the wind field and storm surge , wave derived a two-dimensional storm surge and floodplain control equation . Discretize and solve the finite difference ADI (Alternating Direction Implicit Method) format of the storm surge equations , while taking advantage of the finite volume unstructured grid method to discretize and solve the floodplain control equation . Accordingly, the establishment of the storm surge floodplain numerical prediction models , calculated by storm the Tide -bit process and floodplain inundation area , you can achieve real-time forecasting of storm surge water process . Improve storm surge floodplain the control boundary accuracy of the mathematical models , this paper proposes using harmonic analysis , a nested model wind effects Trinity storm surge floodplain mathematical model boundary determination method and the effects of wave radiation stress on storm surge water and diffuse affect beaches process . Through the Bohai Bay , twice in March 2007 and August 2007 , the storm surge water Computational Simulation and given the coastal floodplains process in the Bohai Bay Storm Tide the median increase water process and assumptions seawall height premise , and Storm tide bit process and Tanggu tidal stations observations were compared , the results show that the storm surge floodplain mathematical model forecast . Tianjin Binhai New Area, the storm surge forecast made ??exploratory work has practical value .

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CLC: > Astronomy,Earth Sciences > Oceanography > Marine basic science > Marine hydrology > Ocean dynamics > Tidal
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