Transboundary Flathead RiverAquatic Adaptation Strategy Strategy

Max. resiliency of aquatic habitat

Muhlfeld & Hauer (GNLCC Project)

Stressors: Invasives

Habitat Loss

Climate Change

Adapted from Glick et al. (2011)

NetMap Digital Landscape

Derived from 10m US and 0.75 arc-second Canadian DEM’s and NHD for low gradient areasa

Spatially Referenced

Integration of Upslope “Inputs”

Stream Channels Divided Upslope Area Identified Upslope Processes

Datasets Included in NetMap Analysis

•! Roads •! Spatially variable sources

of road sediment production and delivery to streams across the FRB

•! Background Sediment Yield

•! Fish habitats (BT and WSCT) - Rough

•! Floodplain and channel migration

•! Wildfire risk and post-fire erosion - US

•! Climate change analysis tools

•! Culvert/Drain data

Stream/Road Analysis Stream/Road Analysis Stream/Road Analysis

Roads Hydrologically Connected GRAIP - Lite Summarize back to Reaches Roads

Erosion and Sediment Delivery from Roads Is Modeled

NetMap Subdivides Roads Additions of drain points and re-analysis improve accuracy of projections Both WEPP and GRAIP built on multiple assumptions for predictive algorithms GRAIP: Sediment Prod. = Base Road Surface erosion rate x Elev. Difference between road endpoints x Road Surface x Veg. NetMap Calculates Distance of road segment to Stream Repeatable Process: new data, fine tune areas, scenarios

Floodplain Dynamics – Considerations of Riparian Management and Road Locations

Riparian management in Channel migration zones Investigation: management activity (road relocation, etc.)

Fish Distribution and Habitat Selection – Ongoing Refinement

Sensitive/vulnerable Aquatic Habitats

Prioritized Risk Assessments

Field Visits: increase efficiency , validate and calibrate

Reaches most vulnerable to sediment delivery where spawning is happening at <4% grade

Field Investigations: Evaluate Modeled “High Risk” Road Segments for Validation/Remediation Options

Field Visits: validate model, what to do about areas, manager collaboration

Upslope inputs tied with stream channel segments

Field Investigations: ID Roads Segments for floodplain intersection? Opportunity Identify sites for field visits Repeatable process Layers ready to be accessed on LC MAP NetMap Loadable on Partner Systems Transboundary Help Documentation Available

Cabin Creek Field Map: Floodplain/Road Intersections

Cabin Creek Field Map: Road Surface Erosion

Cabin Creek Field Map: Priority Reaches and Contributing Roads

Next Steps?

Discussion/Questions? Future incorporation of new data (NOROCK/UM, Canfor)? Application for terrestrial adaptation strategy?