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BASIC THEORY AND MATHEMATICAL MODELING OF URBAN RAINSTORM WATER LOGGING
作者姓名:LIDa-ming  ZHANGHong-ping  LIBing-fei  XIEYi-yang
作者单位:[1]SchoolofCivilEngineering,TianjinUinversity,Tianjin300072.China [2]TianjinInstituteofMeteorologicalSciences,Tianjin300074,China
摘    要:In this paper, a mathematical model for the urban rainstorm water logging was established on the basis of one- and two-dimensional unsteady flow theory and the technique of non-structural irregular grid division. The continuity equation was discretized with the finite volume method. And the momentum equations were differently simplified and dis-cretized for different cases. A method of “special passage” was proposed to deal with small-scale rivers and open channels. The urban drainage system was simplified and simulated in the model. The method of “open slot” was applied to coordinate the alternate calculation of open channel flow and pressure flow in drainage pipes. The model has been applied in Tianjin City and the verification is quile satisfactory.

关 键 词:数学模型  不稳定流  流体力学  城市暴雨测量  有限元理论  无结构不规则网格

BASIC THEORY AND MATHEMATICAL MODELING OF URBAN RAINSTORM WATER LOGGING
LIDa-ming ZHANGHong-ping LIBing-fei XIEYi-yang.BASIC THEORY AND MATHEMATICAL MODELING OF URBAN RAINSTORM WATER LOGGING[J].Journal of Hydrodynamics,2004,16(1):17-27.
Authors:LI Da-ming  ZHANG Hong-ping  LI Bing-fei School of Civil Engineering  Tianjin Uinversity  Tianjin  China  XIE Yi-yang  LI Pei-yan  HAN Su-qin Tianjin Institute of Meteorological Sciences  Tianjin  China
Affiliation:LI Da-ming,ZHANG Hong-ping,LI Bing-fei School of Civil Engineering,Tianjin Uinversity,Tianjin 300072,China,XIE Yi-yang,LI Pei-yan,HAN Su-qin Tianjin Institute of Meteorological Sciences,Tianjin 300074,China
Abstract:In this paper, a mathematical model for the urban rainstorm water logging was established on the basis of one- and two-dimensional unsteady flow theory and the technique of non-structural irregular grid division. The continuity equation was discretized with the finite volume method. And the momentum equations were differently simplified and discretized for different cases. A method of "special passage" was proposed to deal with small-scalerivers and open channels. The urban drainage system was simplified and simulated in the model. The method of "open slot" was applied to coordinate the alternate calculation of open channel flow and pressure flow in drainage pipes. The model has been applied in Tianjin City and the verification is quite satisfactory.
Keywords:urban rainstorm water logging  urban drainage system  mathematical model  unsteady flowtheory  non-structural irregular grids  finite volume method
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