Agenda

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Long-term Continuous GIS-based Modeling of Forest
Land Use Changes in Mica Creek Watershed in
Northern Idaho
Jan Boll Erin Brooks
Bio. and Ag. Eng. Dept. University of Idaho
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Cumulative Watershed Effects Modeling

• SMR (Soil Moisture Routing) model
• WEPP (Water Erosion Prediction Project) model
• CCHE1D (One Dimensional Channel Network Model)

SMR
CCHE1D
WEPP
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Nested watershed system
Control
Partial cut
Clearcut
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Soil Moisture Routing (SMR) Model
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Soil Moisture Routing (SMR) Model
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Soil Moisture Routing (SMR) Model
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SMR Soil Properties

• 4 m total soil depth
• 0.5 m Topsoil _at_ 51 saturated moisture content
• 3.5 m subsoil _at_ 13 saturated moisture content

OR
2.4 m total soil depth 0.5 m topsoil _at_ 51
saturated moisture content 1.9 m subsoil _at_ 25
saturation moisture content
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Mass Balance (Flume 1)
ET reduced after clearcutting SMR over- or
underpredicts Q
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Runoff
Soil depth
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WEPP Model
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CCHE1D
Flume 3
Flume 4
Flume 2
Flume 1
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Typical observed X-sectional data at Mica Creek
near cross-section 2
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Bank Erosion using a critical shear stress of 7 Pa
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Future Work

• Improve WEPP/SMR flow simulations
• Snow and soil parameters in WEPP
• Energy balance snowmelt in SMR?
• Incorporate WEPP/SMR output into CCHE1D
• Parameterize CCHE1D using cross-sectional data