GeoHECHMS

MODRET is an easy-to-use interactive computer program that calculates unsaturated and saturated infiltration losses from stormwater retention/detention ponds in unconfined aquifers using a modified version of MODFLOW. Other unique capabilities include: Generation of single watershed stormwater runoff hydrographs using SCS unit hydrograph, Rational and Santa Barbara urban hydrograph methods with graphical display of the results. Routing of runoff hydrographs (MODRET-generated and/or others) through infiltration losses of ponds and generation of infiltration routed hydrographs. Specification of overflow devices (weirs, orifices and rating curves) for the stormwater retention/detention ponds and calculation of total volume and peak discharges. Generation of ground-water elevation cross-sectional graphics with ZOOM capabilities. Generation of XYZ data files which can be used by other programs (SURFER, AutoCAD, etc.) to generate groundwater contour maps and 3-D surfaces.

GeoHECRAS is a river modeling software used to compute water surface profiles for steady and unsteady flow models, bridge and culvert roadway crossings, FEMA floodplain encroachments, stream restorations, inline reservoir structures, off-channel storage areas, and much more. GeoHECRAS offers: • Quickly Build 1D & 2D HEC-RAS Models • Automatic Assignment of Land Cover as Manning’s Roughness • Digital Terrain Cross Section Cutting • Automated Bridge & Culvert Sizing and Designing • Automated FEMA Floodplain Encroachments • LiDAR Elevation Terrain Processing • Automated Model Calibration • AutoCAD, MicroStation & ESRI ArcGIS Compatible • 100% Compatible with US Army Corps of Engineers HEC-RAS GeoHECRAS provides an easy-to-use, single graphical platform to rapidly create stunning HEC-RAS models and 3D visualizations from a variety of different data sources like AutoCAD, MicroStation, ArcGIS, Google Maps, and more.