Transcript Presentation

Vermont Stream Geomorphic
Assessment Protocols
Extracted from Vermont ANR Stream
Geomorphic Assessment Protocols
Handbook - Introduction
Stream Geomorphic Protocols
Introduction
geo-morphic = land-shape
“Fluvial geomorphic science explains the physical
river processes and forms that occur in different
landforms and geologic and climatic settings.”
• Rivers are dynamic but predictable
• Disturbance by people affects natural physical processes
• Changes in channel form (or type) are at least partially
reversible (management and restoration are is possible)
• Channel form (or type) influence erosion and flood hazard
risk levels and aquatic habitat quantity and quality.
Stream Geomorphic Protocols
Introduction
What is the VT/SGA supposed to do?
• create a data collection protocol that is
scientifically sound, reproducible, and comparable
• create a database system for users inside and
outside the Agency of Natural Resources.
• create a robust method to support conflict
resolution and promote sound land use practices
and planning at the watershed scale.
• create a river assessment methodology,
understandable to lay people, that informs rather
just advises
Stream Geomorphic Protocols
Introduction
Dynamic Equilibrium in Streams
Stream Geomorphic Protocols
Introduction
Physical Processes & Interactions in Rivers
Stream Geomorphic Protocols
Introduction
Consequences of Land/River Management
Stream Geomorphic Protocols
Introduction
Stream Geomorphic Condition as an
Assessment Tool
• In Regime – a stream reach in reference & good condition that:
– Is in expected dynamic equilibrium
– Provides sustainable, high quality aquatic and riparian habitat
• In Adjustment – a stream reach in fair condition that:
– Has change or is changing outside expected range
– Has somewhat degraded aquatic and riparian habitat
• Active Adjustment and Stream Type Departure – a stream reach
in poor condition that:
– Has strong departures from the expected range, perhaps a new type
– Has clearly degraded habitat, frequently disturbed
Stream Geomorphic Protocols
Introduction
Phases of the SGA
• Phase 1 – desk top data gathering
• Phase 2 – field data gathering
• Phase 3 – field engineering survey
Stream Geomorphic Protocols
Introduction
Data Management and Quality Assurance
• Take time to learn the protocols
• Regularly review your data; double
check each other
• Manage your data systematically
Stream Geomorphic Protocols
Introduction