WMS


The All-in-one Watershed Solution
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The complete all-in-one watershed solution

  • GIS Tools
  • Web-based data acquisition tools
  • Terrain data import and editing tools
  • Automated watershed delineation & hydrologic modeling
  • Support for the most industry standard hydrologic models
  • Step-by-step hydrologic modeling wizard
  • Hydraulic modeling & floodplain mapping
  • Storm drain modeling
  • 2D (Distributed) Hydrology
  • Integration with FHWA hydraulic calculation software
  • Export WMS animations to GoogleTM Earth

Automated watershed delineation & hydrologic modeling

  • Automatically delineate a watershed and sub-basins using digital terrain data
  • Automatically compute geometric basin data such as area, slope, mean elevation, maximum flow distance and more
  • With a small amount of input, compute hydrologic basin data such as time of concentration, curve number, and infiltration parameters
  • Industry standard equations for computing sub-basin lag times and times of concentration are included with WMS
  • Add any number of interior outlet points and let WMS subdivide the watershed automatically
  • Manipulate stream networks to represent man-made features or proposed changes to the watershed
  • Override derived basin boundaries to match your knowledge of the watershed

Support for most industry standard hydrologic models

  • A license of WMS Floodplain or greater includes an interface for the following industry standard hydrologic models:
    • HEC-1
    • HEC-HMS
    • TR-20
    • TR-55
    • Rational Method
    • MODRAT
    • OC (Orange County, California) Rational
    • OC Hydrographic
    • HSPF
    • National Streamflow Statistics
    • Convert and compare the results of a watershed developed for one model with any of the other models supported in WMS
    • Read and compare observed hydrographs with computed hydrographs

Hydraulic modeling & floodplain mapping

  • Define a stream centerline and bank stations
  • Define cross section locations
  • Automatically cut cross sections and derive Manning's roughness values from elevation and ground material data
  • Export cross sections to the HEC-RAS or Simplified Dam Break hydraulic models
  • Run the hydraulic model and read the water elevations back into WMS
  • Read water surface elevation data from a hydraulic model or manually input known water surface elevations
  • Create flood extents and flood depth maps using digital terrain data and water surface elevation data points
  • Link the peak flow or complete hydrograph from any of the WMS-supported hydrologic models to an HEC-RAS hydraulic model

Storm drain modeling

  • Draw a storm drain network or import a network from GIS
  • Compute elevations, lengths, and slopes of pipes from underlying elevation data
  • Link the storm drain network to your hydrologic model data
  • Export the hydrologic model data and the storm drain network to EPA-SWMM or XP-SWMM
  • Import existing EPA-SWMM or XP-SWMM files into WMS

2D (Distributed) hydrology

  • WMS supports 2D models:
    • The US Army Corps of Engineers (USACE) GSSHA model
    • The HMS version of the quasi-distributed MODClark method
  • Flood forecasting (depth and velocity over entire 2D domain)
  • Thunderstorm (localized rainfall) flood analysis
  • Surface ponding and infiltration analysis
  • Wetland modeling
  • Land use change impact modeling
  • Groundwater/surface-water interaction modeling
  • Sediment and contaminant modeling

Import what you need

  • USGS DEMs - download and use any format of DEM from the USGS
  • USGS NED data - seamless elevation data can be downloaded and read into WMS
  • ArcGIS Raster (ASCII format) - read elevation or attribute data in gridded format from ArcGIS
  • ESRI Shape files - read all shapes and attributes into WMS
  • DXF and DWG CAD files - WMS now supports the latest versions of DXF and DWG
  • TIFF, JPEG image files - /images along with geo-referencing information can be read by WMS
  • Any data supported by ArcGIS can be read into WMS (ArcGIS license required, compatible with ArcGIS 10.0)

Tools

Customized Watershed Modeling Tools


WMS 11.2 includes a host of customized tools that help complete your projects quickly

GIS Tools

  • Without ArcGIS: import shapefile data and use the imported data for building hydrologic and hydraulic models
  • With ArcGIS: import and use any file format supported by ArcGIS for hydrologic/hydraulic models (ArcGIS 10.0 supported)
  • Export hydrologic and hydraulic model data to a variety of raster and vector GIS formats

Web-based data acquisition tools

  • Download USGS elevation, topographic map, and aerial photography data directly from WMS
  • Seamlessly import downloaded data and use it for building hydrologic and hydraulic models

Terrain data import and editing tools

  • Import a variety of elevation data formats:
    • USGS DEMs - download and use any format of DEM from the USGS
    • USGS NED data
    • ArcGIS Raster (ASCII format)
    • Contour data (as ArcGIS shapefiles or CAD files)
    • XYZ survey points
  • Read, view, edit, and build models with elevation data inside of WMS
  • Combine and modify elevation data from multiple sources into a single dataset that can be used for modeling
  • Modify individual elevation values or stamp linear features (such as levees or stream elevations) into elevation data

Integration with FHWA hydraulic calculation software

  • A license to WMS includes the HY-8 modeling wizard, which guides you through the process of:
    • Delineating a watershed upstream from a culvert and computing a hydrograph
    • Sizing the culvert
    • Routing the hydrograph downstream from a culvert
    • Determining the inundated area behind a culvert
    • Analyzing an existing culvert
  • Draw culvert and roadway layouts, compute lengths, and transfer computed and entered data between WMS and HY-8
  • Create hydraulic structures (stream channels, gutters and inlets, riprap structures, weirs, detention basins, and rational method basins) and run hydraulic computations using FHWA-approved methods in the Hydraulic Toolbox
  • WMS provides interfaces to the latest versions of HY-8 and the Hydraulic Toolbox distributed by FHWA

Models

WMS Supported Models

Models Category Type Method Description
HEC-1 Hydrologic Modeling 1D Lumped Parameter HEC-1 is a lumped parameter hydrologic model used for modeling single storm events. HEC-1 supports several different options for modeling rainfall, losses, unit hydrographs, and stream routing.
HEC-HMS Hydrologic Modeling 1D/2D Lumped Parameter/Quasi-Distributed HEC-HMS is a lumped parameter/quasi-distributed hydrologic model that includes support for MODClark - a quasi-distributed hydrologic model. HEC-HMS has most of the functionality in HEC-1 and is used for modeling single or multiple storm events. It supports several different options for modeling rainfall, losses, unit hydrographs and stream routing.
NSS Regression based Hydrologic Modeling 1D Regression-based Single Node National Streamflow Statistics (NSS) is based on USGS stream gage station data collected throughout the United States and its territories. NSS is used to determine peak flows at ungaged watersheds based on watershed properties such as area, elevation, mean annual rainfall, and other parameters.
TR-20 Hydrologic Modeling 1D Lumped Parameter TR-20 is a hydrologic model used for computing a runoff hydrograph from a single storm event. It uses standard SCS methods to compute a hydrograph.
TR-55 Urban Hydrologic Modeling 1D Lumped Parameter TR-55 is a subset of the TR-20 hydrologic model. It is used to compute watershed hydrographs for small urban areas from a single storm event.
Rational Method Urban Hydrologic Modeling 1D Lumped Parameter The Rational Method is used for computing peak flows for small urban and rural watersheds. The interface to the Rational Method includes methods for getting a hydrograph and has the capability to combine runoff from multiple basins. The interface includes two different methods for determining peak flows/hydrographs at downstream confluences.
MODRAT Urban Hydrologic Modeling 1D Lumped Parameter Modified Rational Method (MODRAT) uses a variable rainfall intensity to compute flow as well as land use and soil information to compute the runoff coefficient. The model is used for single storm events in small urban areas.
OC Rational Urban Hydrologic Modeling 1D Lumped Parameter OC Rational is used to compute peak flows on small, urban watersheds less than 1 square mile in Orange County, California and includes the ability to combine runoff from multiple basins.
OC Hydrograph Urban Hydrologic Modeling 1D Lumped Parameter OC Hydrograph is used to compute peak flows on watersheds greater than 1 square mile in Orange County, California.
HSPF Water Quality and Hydrologic Modeling 1D Lumped Parameter HSPF is a lumped parameter hydrologic model used for modeling short or long-term watershed quantity and quality for small or large watersheds. The model allows for simulation of hydrology and water quality in natural and man-made systems.
EPA SWMM Strom Drain Modeling 1D N/A EPA-SWMM is a dynamic rainfall-runoff simulation model used for single events or long-term (continuous) simulation of runoff quantity and quality from primarily urban areas. The model includes tools for hydrology, stormwater, sanitary sewer and hydraulic modeling.
XP-SWMM Strom Drain Modeling 1D/2D N/A XP-SWMM is similar to EPA-SWMM with a user-friendly interface which includes the ability to define almost any storm drain or sanitary sewer configuration. The model includes tools for hydrology, stormwater, sanitary sewer and hydraulic modeling.
HEC-RAS Hydraulic Modeling 1D N/A HEC-RAS is a 1D hydraulic model used for steady and unsteady open channel flow computations. HEC-RAS includes tools for running sediment transport and water quality analyses. HEC-RAS is capable of modeling subcritical, supercritical, and mixed flow regime profiles and is able to model inline channel structures such as culverts, weirs, and bridges.
SMPDBK Dam Break Hydraulic Modeling 1D N/A SMPDBK is a hydraulic model used to simulate downstream flooding produced by a dam failure. The model has largely been replaced by the HEC-RAS dam break algorithms, though simulations can still be run using a 32-bit DOS emulator.
GSSHA Hydrologic, Hydraulic and Groundwater Modeling 2D Finite Difference GSSHA is a 2D hydraulic model used for watershed and floodplain analysis of single events or long term studies. GSSHA includes additional capabilities for groundwater modeling, contaminant transport, sediment transport, and storm and tile drain modeling.
CE-QUAL-W2 Hydrodynamic Reservoir & Estuary Water Quality Modeling 2D Finite Difference CE-QUAL is a 2D hydrodynamic model used to evaluate reservoir and estuary water quality. It is primarily used to model fresh water rivers, lakes, and estuaries.
HY-8 Culvert Analysis N/A N/A The HY-8 model is used to determine the upstream headwater depth and culvert barrel flow profile for a variety of different culvert configurations. The HY-8 wizard in WMS is used to delineate a watershed upstream from a culvert, compute a hydrograph, and determine the inundated area behind a culvert from an HY-8 analysis.
HY-12 Strom Drain Modeling 1D HEC-22 The HY-12 interface is used to design or analyze a storm drain system. Rational method computations, curbs and gutters, inlets, access holes, pipes, channels, and other storm drain network features can be analyzed using standard FHWA methods with the HY-12 model.
Hydraulic Toolbox Hydrolic and Hydrologic Modeling N/A N/A The Hydraulic Toolbox includes a number of calculators used to analyze channels, weirs, gutters and inlets, detention basins, and particle gradations. The Hydraulic Toolbox also includes Rational Method hydrologic analysis tools.
EPANET Water Distribution Modeling N/A N/A EPANET is a widely used water distribution model developed by the US Environmental Protection Agency. WMS now supports reading and editing existing EPANET models as well as reading GIS data files and mapping attributes to the EPANET model attributes.

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