NHC conducts hydrologic, geomorphic, hydraulic, and sediment transport analyses to support preservation and restoration of rivers, creeks, lakes, wetlands, and estuaries. We also provide a full range of design services, from conceptual plans to final construction documents, for projects involving channel restoration, habitat features, and bio-engineered bank stabilization.
Our services include:
- Hydrologic Modeling
Detailed analysis of flow conditions to support habitat functions and biological life stages.
- Geomorphic Analysis
Examining the channel and wetland evolution and their effects on habitat values.
- Hydraulic Modeling
To address channel-floodplain interactions and natural processes.
- Sediment Transport Analysis
To assist with the design of stable channels in natural and modified settings.
- Environmental Permitting
Support for permitting processes.
- Project Design
Developing plans, specifications, and estimates for project implementation.
- Geomorphic Restoration
Technical analysis and design to restore natural stream channel conditions, recreate and restore floodplains, and maintain channel complexity in a variety of geomorphic and ecological settings.
- Ecological Mitigation
Planning, detailed design, and monitoring of projects to mitigate unavoidable impacts on stream and wetland environments, including projects targeting specific riparian and aquatic habitat communities and species.
Hydrologic, hydraulic, and sedimentation analyses specifically designed as indicators of ecological success, such as wetland hydro-period characteristics, tidal marsh evolution, floodplain inundation, and gravel transport for spawning, egg detachment and transport, and fish passage.
- Multi-objective Restoration
Many projects combining habitat restoration and flood management, recreation, channel stabilization, infrastructure development, and other objectives.
- Special Status Species
Analysis and habitat design services for salmonids, cyprinids, smelt, other special-status fish species, and threatened or endangered amphibians, reptiles, and birds.
Constructed riffle on tributary to the Mahatta River, Vancouver Island, BC
Wilson Canyon restoration, NV
Two-dimensional meadow inundation
modeling, Lake Tahoe, CA
Engineered log jam on
Nooksack River, WA
Benefits & Results:
- Promotes preservation and restoration of physical conditions and processes to achieve ecological objectives sustainably.
- Sound hydro-technical analysis supports effective ecological restoration for multi-objective projects.
- Clients and stakeholders receive solid information to effectively plan, permit, design, cost, and implement their projects.