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Introduction
Hydrologic relations
- USGS regional curves
- Drainage area
- Field calibration of bankfull discharge, cross-sectional area
- Final determination of bankfull discharge, bankfull dimension
Stream morphology
- Stream classification
- Detailed morphological relations: dimensionless ratios
Stability Analysis
- Channel stability analysis
- Bank erosion prediction (BEHI, NBS)
- Output: streambank erosion rates, tons/yr
Flow/sediment relations
- Flow modification
- Dimensionless flow duration curves
- Bankfull Q, suspended sediment, bedload
Sediment rating curves
- Ref dimensionless sediment, bedload rating curves
- Convert to dimensional suspended sediment, bedload rating curve
Return to Flow/sediment relations
- Convert to dimensional glow duration curve
Return to Sediment rating curves
- Calculate sediment yield for baseline existing condition: flow related sediment yield
- Output: flow-related increase above baseline
Channel and sediment supply changes from hillslope, channel and hydrologic processes
- Changed channel characteristics
- Bedload transport (stream power)
- Hillslope processes (introduced sediment supply)
- Output: introduced hillslope sediment
- Entrainment competency calculation: bar, bed samples
Stream stability consequences summary
- Sediment transport changes, excess power and/or sediment
- Aggradation potential deposition and meander patterns
- Degradation, BHR ER, excess flow
- Enlargement
- Stream succession state shift
Summary Analysis
- Output: total sediment summary tons/yr
- Departure analysis: compare to baseline sediment yield
- ID disproportionate sediment loads and/or stability effects by land use category
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