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Flood and Erosion Hazard Assessment/Mitigation

NHC excels in flood and erosion management, blending science-based modeling with policy initiatives. Our team assesses strategies, from site-specific to regional scales, using innovative tools like hydraulic modeling and GIS mapping. We pioneer multi-event analyses for designing protection infrastructure, crucial for adapting to climate change and land-use shifts. We take a science-based approach to develop integrated strategies emphasizing hybrid and nature-based solutions, community resilience, improved land use planning, and stakeholder collaboration.

Services Provided

 

  • Flood risk assessment and mapping
  • Flood hazard reduction studies
  • Analysis and management of erosion and sedimentation
  • Numerical hydraulic modeling
  • Geomorphic assessment

 

  • Coastal/estuary flooding, wave run‐up, storm surge, and sea level rise assessment
  • Design of erosion protection
  • Field surveys
  • Data collection
  • Hydrometric monitoring

Relevant Experience

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Coal Creek Drive Bank Protection

Coal Creek Drive ends at the Cowlitz River northeast of the town of Packwood. Since 2003, the river has eroded approximately 80-150 feet into the left bank, including the roadway,…
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Erik Rowland

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206.241.6000

Contact Erik

Seattle, WA

Kingcome River Flood and Erosion Hazard Assessment

Gwa-Yee Village is located in the Kingcome River valley, approximately 7 km upstream from the river estuary. Following a very large flood in September of 2010 that resulted in the…
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Derek Ray

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604.980.6011

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Vancouver, BC

FEMA Pacific Coast Mapping Study

Using FEMA’s recently adopted Pacific Coast Floodplain Mapping Guidelines, NHC produced new flood hazard mapping for over 50 miles of coastline in Juneau, Alaska. This was the first mapping project…
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Erik Rowland

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206.241.6000

Contact Erik

Seattle, WA

Coastal Flood Risk Assessment

NHC completed a study for City of Vancouver to identify and quantify the assets at risk of damage as a result of sea level rise-induced coastal flooding. The project comprised…
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Derek Stuart

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206.241.6000

Contact Derek

Bellingham, WA

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