cumulative impact estimation for landscape scale forest planning finn krogstad & peter schiess...
Post on 19-Dec-2015
219 views
TRANSCRIPT
![Page 1: Cumulative Impact Estimation For Landscape Scale Forest Planning Finn Krogstad & Peter Schiess Forest Engineering, U. Washington](https://reader035.vdocuments.us/reader035/viewer/2022062407/56649d365503460f94a0e46c/html5/thumbnails/1.jpg)
Cumulative Impact Estimation For Landscape
Scale Forest Planning
Finn Krogstad & Peter SchiessForest Engineering, U. Washington
![Page 2: Cumulative Impact Estimation For Landscape Scale Forest Planning Finn Krogstad & Peter Schiess Forest Engineering, U. Washington](https://reader035.vdocuments.us/reader035/viewer/2022062407/56649d365503460f94a0e46c/html5/thumbnails/2.jpg)
OUTLINE
PROBLEM: Evaluating Landscape Plans
APPROACH: Hydrologic Modeling in GIS
QUESTION:What is ‘Cumulative Impact’?
![Page 3: Cumulative Impact Estimation For Landscape Scale Forest Planning Finn Krogstad & Peter Schiess Forest Engineering, U. Washington](https://reader035.vdocuments.us/reader035/viewer/2022062407/56649d365503460f94a0e46c/html5/thumbnails/3.jpg)
PLANNING IN TIME AND SPACE
![Page 4: Cumulative Impact Estimation For Landscape Scale Forest Planning Finn Krogstad & Peter Schiess Forest Engineering, U. Washington](https://reader035.vdocuments.us/reader035/viewer/2022062407/56649d365503460f94a0e46c/html5/thumbnails/4.jpg)
DETAIL
![Page 5: Cumulative Impact Estimation For Landscape Scale Forest Planning Finn Krogstad & Peter Schiess Forest Engineering, U. Washington](https://reader035.vdocuments.us/reader035/viewer/2022062407/56649d365503460f94a0e46c/html5/thumbnails/5.jpg)
COMPARING ALTERNATIVES
ECONOMICS
• Timber Yield
• Road Costs
ENVIRONMENT
• Sediment
• Water
• etc.
![Page 6: Cumulative Impact Estimation For Landscape Scale Forest Planning Finn Krogstad & Peter Schiess Forest Engineering, U. Washington](https://reader035.vdocuments.us/reader035/viewer/2022062407/56649d365503460f94a0e46c/html5/thumbnails/6.jpg)
MODELING OBJECTIVES
Input - entire landscape plans
Output - cumulative impacts ratio
Simplicity - for general users
Transparency - assumptions & processes
Modularity - alternate models
Consistency - watershed analysis
Compatibility - ArcInfo GIS system
Robustness - relative rather than absolute
![Page 7: Cumulative Impact Estimation For Landscape Scale Forest Planning Finn Krogstad & Peter Schiess Forest Engineering, U. Washington](https://reader035.vdocuments.us/reader035/viewer/2022062407/56649d365503460f94a0e46c/html5/thumbnails/7.jpg)
HYDROLOGIC MODELING IN GIS
Divide the problem into component modules of production, routing, and accumulation.
coarsesediment
finesediment
peakflows
LWDshade
cumulative impact
stream sensitivity/resource vulnerability
stands/roadstopography
soils
harvestingconstruction
fire/blowdown
Events Maps
masswasting
surfaceerosion
rain-on-snow/road interception
![Page 8: Cumulative Impact Estimation For Landscape Scale Forest Planning Finn Krogstad & Peter Schiess Forest Engineering, U. Washington](https://reader035.vdocuments.us/reader035/viewer/2022062407/56649d365503460f94a0e46c/html5/thumbnails/8.jpg)
GRIDDING THE WORLD
PROCESS LOCALLY
All physical processes are local in nature.
INTEGRATE GLOBALLY
Impacts can accumulate across space, time and management activities.
![Page 9: Cumulative Impact Estimation For Landscape Scale Forest Planning Finn Krogstad & Peter Schiess Forest Engineering, U. Washington](https://reader035.vdocuments.us/reader035/viewer/2022062407/56649d365503460f94a0e46c/html5/thumbnails/9.jpg)
CUMULATIVE IMPACT
1. Different sources
For example, fine sediment:– roads– harvest– streambank– landslide
![Page 10: Cumulative Impact Estimation For Landscape Scale Forest Planning Finn Krogstad & Peter Schiess Forest Engineering, U. Washington](https://reader035.vdocuments.us/reader035/viewer/2022062407/56649d365503460f94a0e46c/html5/thumbnails/10.jpg)
CUMULATIVE IMPACT
1. Different sources
2. Different reaches– ‘a reach is a reach’– reach sensitivity– habitat location– habitat quality
![Page 11: Cumulative Impact Estimation For Landscape Scale Forest Planning Finn Krogstad & Peter Schiess Forest Engineering, U. Washington](https://reader035.vdocuments.us/reader035/viewer/2022062407/56649d365503460f94a0e46c/html5/thumbnails/11.jpg)
CUMULATIVE IMPACT
1. Different sources
2. Different reaches
3. Different years– catastrophic vs. chronic– species life history
![Page 12: Cumulative Impact Estimation For Landscape Scale Forest Planning Finn Krogstad & Peter Schiess Forest Engineering, U. Washington](https://reader035.vdocuments.us/reader035/viewer/2022062407/56649d365503460f94a0e46c/html5/thumbnails/12.jpg)
CUMULATIVE IMPACT
1. Different sources
2. Different reaches
3. Different years
4. Different inputs
production
delivery
accumulation
sensitivity
vulnerability
Stream shade
production
delivery
accumulation
sensitivity
vulnerability
Wood
production
delivery
accumulation
sensitivity
vulnerability
Fine sed
production
delivery
accumulation
sensitivity
vulnerability
Peakflow
production
delivery
accumulation
sensitivity
vulnerability
Coarse sed
Cumulative Impact
![Page 13: Cumulative Impact Estimation For Landscape Scale Forest Planning Finn Krogstad & Peter Schiess Forest Engineering, U. Washington](https://reader035.vdocuments.us/reader035/viewer/2022062407/56649d365503460f94a0e46c/html5/thumbnails/13.jpg)
CUMULATIVE IMPACT
1. Different sources
2. Different reaches
3. Different years
4. Different inputs
5. Different species– salmon vs. elk vs. frogs
![Page 14: Cumulative Impact Estimation For Landscape Scale Forest Planning Finn Krogstad & Peter Schiess Forest Engineering, U. Washington](https://reader035.vdocuments.us/reader035/viewer/2022062407/56649d365503460f94a0e46c/html5/thumbnails/14.jpg)
CONCLUSIONS
This approach goes beyond the accuracy of current models and data, but it should be pursued because:
1. Even flawed predictions provide insight
2. Improve models with observations
3. Crude predictions vs. broad regulations