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Flood Hazard & Risk Assessment

Urbanization and climate change are increasing flood risk to our communities. For more than a decade, we’ve integrated innovative, cost-effective geographic information system (GIS) technology into our hydrologic and hydraulic (H&H) modeling and floodplain mapping services. We deliver advanced 1-D and 2-D modeling methods and applications that help communities understand and reduce flood risks to protect property and save lives.

Our Expertise

For the last 15 years, we have served as a technical consultant under the Federal Emergency Management Agency’s (FEMA’s) Flood Insurance Study Program. Our assignments have included hundreds of miles of detailed hydrologic and hydraulic studies, flood hazard boundary mapping along thousands of stream miles, and consequence assessments and outreach in communities across FEMA Regions III and IV and the State of Wisconsin. 

Additionally, as part of a joint venture under a U.S. Army Corps of Engineers contract, we conducted GIS-based H&H analyses, consequence assessments, and inundation mapping for numerous dams and levees across the U.S. Under this contract, we have developed economic and human-impact consequence models for areas extending for hundreds of river miles. 

Our staff are skillful, well trained, and have extensive experience with automated H&H applications, such as HEC-GeoRAS, HEC-GeoHMS, and Esri’s ArcHydro Tools. Additionally, we tailor solutions to meet our clients specific needs, including developing our own custom GIS tools for specific tasks and types of data. These tools streamline our H&H model development and floodplain mapping processes, enabling us to put quality data in the hands of those who need it.

Flood Hazard & Risk Assessment Solutions

  • Consequence analyses
  • Dams and levees
  • Emergency action planning
  • Flood mitigation alternatives analysis
  • GIS.

We’ve produced dozens of Flood Insurance Studies and thousands of Digital Flood Insurance Rate Maps as a FEMA contractor under Map Mod and Risk MAP.

Flood Hazard & Risk Assessment Services

Featured Services

  • Civil design
  • FEMA and flood control districts coordination
  • Detention/retention basin analysis
  • Development of potential flood hazard mitigation measures
  • Disaster response assistance services
  • Erosion, sedimentation, and geomorphic analysis
  • Floodplain mapping 
  • Geomorphology and historical flood analysis
  • Hydraulic analysis of offsite and onsite flood corridors and pathways
  • Hydrologic and bathymetric surveying
  • Hydrologic and hydraulic engineering
  • Post-disaster inspection and assessment
  • Qualitative and quantitative risk assessment
  • Simulation of flood propagation
  • Strategic GIS and IT solutions for engineering.

Specialized Services

  • Advanced flood inundation mapping

    Computer-based, sequential mapping system gives you the right flood risk information at the right time, factoring in roadway overtopping, backwater and automated clean-up to remove small islands and disconnected polygons.
  • Assessment and risk communication development

    Esri grids to display flood hazard information, such as depth, velocity, time of arrival, peak time, and rate of rise.
  • Digital Elevation Models (DEMS) and steam networks

    Software provides more accurate terrain survey data to lower administration costs by reducing revisions to floodplain mapping.
  • Hydrologic computing

    Modeling parameters, such as watershed delineation, slope, runoff curve numbers, time-of-concentration, and elevation-storage relationships for flood routing.
  • Latest Esri ArcGIS technology

    Using ArcGIS Online to communicate flood hazards and mitigation practices in order to reduce flood risks and to raise awareness within communities.

Learn More About These Capabilities