Storm water simulation: modeling and analysis of a three-dimensional cloud

Article Abstract:

A simulation of storm water is presented for developing a physical understanding of storm runoff from urban basins. A new three-dimensional cloud model simulates storm rainfall. The model contains nine prognostic equations: three momentum equations, pressure and thermodynamic equations, three moisture and water equations, and a subgrid kinetic energy equation. A particular coordinate transformation is used. It maps a simulation domain with an irregular lower boundary onto a rectangular domain. A finite difference scheme which conserves heat, moisture, water substances, and subgrid-scale motion solves the transformed equations. The rainfall is averaged in space and time for a basin to obtain the hyetograph. We use the Road Research Laboratory Hydrograph method (the RRL method) to computer the storm runoff hydrograph for the basin from the hyetograph. A simulation result for a simplified atmospheric condition is presented. (Reprinted with permission of the publisher.)

Natural resources, Modeling, Data modeling software, Transforms

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Computers Handle Algebra, Too

Article Abstract:

Some people using simulation packages become bogged down with algebraic expressions. At least two software packages exist to help with the algebraic calculations needed in simulations. Both MACSYMA and SMP are designed to deal with algebraic expressions and send their results to other programs.

Software, Simulation Languages, Algebraic Languages

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