Hydraulic/Hydrologic Modeling
and Risk Assessment

We bring over 20 years of experience conducting detailed hydrologic, 1-D and 2-D hydraulic modeling, and sediment transport analyses. NSD team members hold certificates in floodplain management (CFM) and perform “no-rise” hydraulics and floodplain re-mapping (CLMOR/LOMR) for projects within FEMA regulatory floodplains. We use a wide variety of models including HEC-RAS, HEC- GeoRAS, HEC-6, RiverFlo-2d, River2d, FESWMS, RMA2, HEC-HMS, HSPF and HEC-SSP. Over the last 10 years, we have also developed unique risk assessment methodologies for infrastructure protection, river and wetland restoration, fish passage, flood studies and engineering designs.