行政院國家科學委員會補助專題研究計畫成果報告:防洪示範區淹水境況模擬與決策支援系統之研究─子計畫：台南科學園區排洪能力及洪災防治措施之研究(Ⅲ)
Date Issued
2003
Date
2003
Author(s)
許銘熙
DOI
912625Z002006
Abstract
This project is the subproject-2, A Study on Drainage Ability and Flood-Damage Mitigation Measures for Tainan Science-Based Industrial Park, of the three-year integrated project, Inundation Scenario Simulation and Decision Support System for Flood-Damage Mitigation in Pilot Areas (Ill).
Based on hydrologic and topographic conditions and hydraulic characteristics of storm systems, an inundation model is developed and applied in the Tainan Science-Based Industrial Park and the Yen-shui Creek Basin. The inundation model, which combines the 1 -D channel-flow model, the 2-D overland-flow model, the detention pond simulation model and the storm sewer systems model, is developed to simulate the inundation in the study area. Storm Water Management Model (SWMM) is employed to solve the storm sewer flow component and to provide the surcharged flow hydrographs for surface runoff exceeding the capacity of the storm sewers. The l-D unsteady dynamic flow model is used to simulate the water-stages and flow velocities in the channels. The 2-D diffusive overland-flow model considering the non-inertia equation with alternative direction explicit numerical scheme is then used to calculate the inundation zones and depths due to the surcharged water on overland surface. Detention pond model considers outlet work with rectangular orifices and weirs used for solving hydraulic equations to provide the outflow hydrographs of the detention ponds.
The drainage and inundation model is developed based on the topographical and hydraulic characteristics in the study area. The inundation model is verified by the Typhoon Nan event in Central Taipei area in 2001. Different flooding scenarios are simulated for the study area with different obstruction ratios of the sewer drainage systems in the Tainan Science-Based Industrial Park. The drainage improvement measures in the Yen-shui Creek Basin are also evaluated with different designed storms. The simulated results are used to examine the flood draining ability of current drainage systems and flood mitigation measures and provide guide lines for the development of flood mitigation measures.
Subjects
Storm sewer system
Overland flow
Detention pond
Geographic Information System
Inundation model
Publisher
臺北市：國立臺灣大學生物環境系統工程學系暨研究所
Type
report
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912625Z002006.pdf
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7.36 MB
Format
Adobe PDF
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