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| MWH Soft launches new InfoSWMM Calibrator In its ongoing quest to equip the global wastewater industry with the world's most comprehensive and innovative GIS-centric modeling and design solutions, MWH Soft announced the release of InfoSWMM Calibrator. This revolutionary new calibration platform for urban drainage system models is the first ArcGIS-centric (ESRI, Redlands, CA) optimization software in the world to unleash the power of advanced object-oriented Genetic Algorithms technology in a true high-performance GIS environment. The result is the fastest, most practical, most comprehensive and accurate GIS-based network model calibration program ever created for wastewater engineers. Until now, calibrating an urban drainage network model was an exhaustive trial-and-error process of adjusting the model input parameters, using basic engineering judgment, until the model results coincided with observed field conditions. To be effective, such calibrations had to consider extensive time series of measured data - an entire wet weather season of a particular year, one or more years of field measurement data - to ensure that the model accurately simulated the actual physical system under all conditions. InfoSWMM Calibrator fully automates and greatly simplifies this manual process, making urban drainage model calibration a remarkably easy and enjoyable task. InfoSWMM Calibrator considers any combination of flow, depth, and velocity measurements, quickly adjusting user-selected model parameters to best reflect what is actually occurring in the system. Five distinct groups of urban drainage network parameters, in any combination, can be automatically determined: - A subcatchment group such as subcatchment runoff parameters and groundwater parameters including area, width, percent imperviousness, slope, Manning's N for pervious and impervious subareas, depression storage for pervious and impervious subareas, Colorado Urban Hydrograph Procedure parameters such as length, centroid distance, CIA fraction, RPA fraction, lag time for Natural Resources Conservation Service's dimensionless and triangular unit hydrograph method, groundwater flow coefficient, surface water flow coefficient, groundwater flow exponent, surface water flow exponent, surface-groundwater interaction coefficient. - A soil group (i.e., infiltration parameters) including Horton's parameters like maximum infiltration rate, minimum infiltration rate, decay rate, drying time, maximum volume; Green-Ampt parameters such as suction, conductivity, initial deficit; and Curve Number parameters such as curve number, conductivity, and drying time. - An aquifer group including porosity, wilting point, field capacity, conductivity, conductivity slope, tension slope, upper evaporation fraction, lower evaporation depth, bottom elevation, water table elevation, and unsaturated zone moisture. - An RDII group (i.e., RDII unit hydrograph parameters) including R, T, and K parameters for short-term, medium-term, and long-term responses. - A conduit group which includes the Manning's roughness coefficient. Extremely flexible and powerful, InfoSWMM Calibrator offers a variety of rigorous goodness-of-fit evaluation criteria including Simple Least Square Error, First Dimensionless Form of Simple Least Square Error, Mean Least Square Error, Root Mean Square Error, Dimensionless Form of Root Mean Square Error, Nash-Sutcliffe Efficiency Criterion, Modified Coefficient of Efficiency, R-Square, and deviation in total volume of observed and simulated values. It allows wastewater engineers to generate credible models to help them optimize system performance and capital improvement programs while saving significant amounts of time and money. Calibrator's incredible ease of data exchange and integration with existing network models and GIS systems further enhances its value. write your comments about the article :: © 2005 Construction News :: home page |