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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.

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Presentation on theme: "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."— Presentation transcript:

1 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

2 Cumulative Watershed Effects Modeling SMR (Soil Moisture Routing) model WEPP (Water Erosion Prediction Project) model CCHE1D (One Dimensional Channel Network Model) WEPP SMR CCHE1D

3 Nested watershed system Clearcut Partial cut Control

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7 Soil Moisture Routing (SMR) Model

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10 SMR Soil Properties 4 m total soil depth – 0.5 m Topsoil @ 51% saturated moisture content – 3.5 m subsoil @ 13% saturated moisture content 2.4 m total soil depth 0.5 m topsoil @ 51% saturated moisture content 1.9 m subsoil @ 25% saturation moisture content OR

11 Mass Balance (Flume 1) ETRunoffBaseflowQ (Sim)Q (Obs) Pre- disturbance 56.730.414.444.839.5 After Road61.030.014.344.342.9 Clearcut44.737.317.054.355.1 ET reduced after clearcutting SMR over- or underpredicts Q

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13 Runoff Soil depth

14 WEPP Model

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19 CCHE1D Flume 3 Flume 4 Flume 2 Flume 1

20 Typical observed X-sectional data at Mica Creek near cross-section 2

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22 Bank Erosion using a critical shear stress of 7 Pa

23 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

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