Continuous Simulation of  Runoff from Urban Stormwater Systems with UrbSim Version 1.0 UrbSim Version 1.0 simulates the rainfall and runoff processes from an urban catchment.  The model can also simulate flow through ponds or basins located within the catchment. UrbSim Version 1.0 models the rainfall and runoff processes in an urban catchment to predict the continuous record of runoff at the outlet to a catchment.  The simulation model uses a discretised  time series record of rainfall and potential evapotranspiration (PET).  The simulation is undertaken at discrete time steps, whose size is defined by the user.  The length of the simulation period must also be defined before the simulation is undertaken. The generation of runoff from a Sub Catchment node is modelled using two separate processes.  The first process is the generation of daily rainfall excess based on the rainfall and PET applied to the Sub Catchment area.  The second process modelled is the conversion of this rainfall excess into runoff and the routing of this runoff to the Sub Catchment outlet.   Fully Interactive Screen Editing of Catchment Layout 32 bit Application, compatible with MS Windows 2000 and later   Edit Catchment Details Interactively Model Sub-Catchments, Basins and Defined Inflows. Interactive Graphing of Simulation Results Import Observed Data for Calibration

Undertake Flood Frequency Analysis of Simulation Results Model sub-Daily Rainfall and Runoff Processes in Urban Catchments

• Fully interactive using the Microsoft Windows Graphical User Interface.
• Fully interactive on-line help.
• Simulate sub-daily runoff from urban catchments due to rainfall.
• Model the hydrological characteristics of an urban catchment using an arrangement of sub-catchments based on the physical layout of the urban drainage network.
• Interactively create the drainage network using sub-catchment, basin, inflow or junction nodes.
• Interactively add drainage links between nodes to model the drainage network.
• Model routing of overland flow in sub-catchments using an area weighted routing algorithm.
• Model the effects of channel routing using either an area weighted or Muskingum routing algorithm.
• Models the spatial distribution of rainfall and evapotranspiration from up to ten (10) rainfall or evaoptranspiration stations throughout the catchment.
• Interactively run the model simulation based on rainfall and evapotranspiration data.
• Interactively view graphs of the simulation results from within UrbSim.
• Compare simulation results with observed runoff data for the urban catchment.
• Automatic calibration of the daily rainfall excess model using a pattern search algorithm.
• Prepare partial series flood frequency analyses of the urban runoff simulation results.

• An IBM compatible PC.
• A mouse, this is optional but is recommended
• Microsoft Windows 2000 or later.
• VGA 800x600 or higher-resolution screen supported by Microsoft Windows.
• Microsoft Internet Explorer version 5.x.

You are free to use and distribute copies of the program, royalty free.  Limited support is provided with the program.  However, the authors are interested in your comments regarding the application of the program and any possible future modifications that can be made to improve the functionality of the software.  Users are also asked to show due reference to the authors of the software where appropriate.

Dr Graham A. Jenkins

School of Environmental Engineering

Griffith University

Nathan, Qld, 4111

Tel: (07) 3875 7961

Fax.; (07) 3875 7459

E-mail: graham.jenkins@griffith.edu.au

Download UrbSim Version 1.0