Pilot Project Working Group Timber Regulation and Forest Restoration Program April 26 2018 Prototyping a GIS synthesis of the Three Track Process THP mining watershed modeling and air photo rapid assessment ID: 682506
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Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
Pilot Project Working Group
Timber Regulation and Forest Restoration Program
April 26, 2018Prototyping a GIS synthesis of the Three Track Process (THP mining, watershed modeling, and air photo rapid assessment)California Natural Resources AgencyDepartments of ConservationFish and WildlifeForestry and Fire ProtectionCalifornia Environmental Protection AgencyState and Regional Water BoardsSlide2
Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
Synthesis of the 3-track Analysis on Smith Creek
Method: GIS Overlay Analysis
Inputs: Review of data from the 3-track analysisNeeds: Subject matter experts to make decisions about InputsSlide3
Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
Method
Using the steps outlined in ‘Understanding Overlay Analysis’1. Define the problem = what is the objective?Two of the ‘substantive areas to be addressed by the pilot projects’ are ‘description of current forest conditions’ ‘identification of restoration opportunities in forested landscapes’.(Forest Planning Watershed Pilot Projects Concept Paper, May 2016)
Resource of Concern = Coho salmonObjective = use results of the 3-track analysis on Smith Creek to identify specific areas where restoration efforts might be of most value, or have the greatest potential impact.Concept Paper states the following: To define “restoration” in the context of the pilot projects, we borrow from the Society for Ecological Restoration: “Ecological restoration is the process of assisting the recovery of an ecosystem that has been degraded, damaged, or destroyed.”Slide4
Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
2. Break the problem into submodels
ASSETS and THREATS Using the data collected during the 3-track analysis, Assets could includeAdequate riparian function
Coho intrinsic potentialExisting and restorable coho habitatPool formation potential from large wood recruitmentWatercourses and WLPZThreats could includeErosion hazard ratingsInstream water temperature (not part of the analysis but deemed a missing piece)LandingsRoadsTimber harvesting
Watercourse crossingsSlide5
Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
Other inputs are more complex and require expert knowledge.
3. Determine significant layers
Identify:Inputs (datasets)Input attributes to be valuedSome inputs will be straightforwardExample – Asset: Coho HabitatInputs = Habitat data (from THP)Input attributes = habitat type Slide6
Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
4. Reclassification/Transformation
Convert the input data to raster = grid cell with each cell containing data about the featureReclassify and Value this data – interval or ordinal scales are probably the best fit hereExample: Riparian Function Assessment using Aerial Imagery
Data was captured in the GIS as a polygon of the 150’ WLPZ or riparian area. The entire riparian area was attributed as ‘moderate’, per the assessment. Slide7
Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
4. Reclassification/Transformation (continued)
The polygon was converted to a raster creating a rectangular grid of cells.The raster was reclassified using these values: No Data 0 Low 1 Moderate 2
High 3Slide8
Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
5. Weight
Certain inputs may be considered more important than others.For example, if Input 1 is considered to be twice as important as Input 2, Input 1 values should be multiplied twice as much as Input 2 values. The ratio for these inputs should be 2:1.Weighting decisions are usually made once all the inputs and their relevant attributes have been decided on. Weighting is optional.
Expert knowledge is required to make weighting decisions. Slide9
Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
6. Add/CombineThe data is now in a uniform format and weighted appropriately.
Asset input layers are added together to identify areas of highest asset value.Threat input layers are added together to identify areas where threats to the resource of concern are highest.Slide10
Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
7. AnalyzeHow to identify potential locations for restoration from these results?
Regroup the values into High, Medium, and LowSlide11
Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
7. Analyze (continued)If we view the results in terms of RISK, we can ask:
Where are the Assets at greatest risk? Or,Where are high Assets overlapped by medium or high Threats?
Ground truth:Potential restoration sites must be visited to validate the analysis.Slide12
Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
Refinement of Inputs
Inputs –finalize listInput Values – determined by Subject Matter ExpertsSlide13
Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
Inputs
Data collected during the 3-track analysis:Assets could includeAdequate riparian functionCoho intrinsic potentialExisting and restorable coho habitat
Pool formation potential from large wood recruitmentWatercourses and WLPZ Threats could includeErosion hazard ratingsInstream water temperature (not part of the analysis but deemed a missing piece)LandingsRoadsTimber harvestingWatercourse crossingsSlide14
Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
Subject Matter Experts – Potential Decisions Points
Assets could includeAdequate riparian functionCoho intrinsic potentialExisting and restorable coho habitat
Pool formation potential from large wood recruitmentWatercourses and WLPZ Threats could includeErosion hazard ratingsInstream water temperature (not part of the analysis but deemed a missing piece)LandingsRoadsTimber harvestingWatercourse crossingsSlide15
Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
RoadsRoads could be valued by distance from watercourse.Roads by slopeSlide16
Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
Zones of Influence for Class I watercourses
Add road slope to thisRoads could be valued by location in WLPZ, not in WLPZSlide17
Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
Zones of Influence for Roads100m for permanent roads (black)
250m for seasonal/temporary roads(grey)Road density per acreSlide18
Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
Watercourse crossings – roads could be valued by presence within 100ft of crossing
Road-stream crossing density per acreSlide19
Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
Timber Harvesting
A simple valuing of timber harvesting by silvicultural category and yarding:Silvicultural Category No Harvest 0Unevenaged 1Intermediate 2Special Treatment 3Evenaged & ROW 4Yarding Balloon/helicopter 1Other helicopter combos & Animal 2
Cable 3Cable/Tractor option 4Tractor/Cable option 5Tractor 6Slide20
Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
Valued this way, all the years of harvesting can be added up to produce a
Total Harvest Impact.Slide21
Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
Other Ways to Value Timber HarvestingTimber Harvesting and Zones of Influence of roads
Timber Harvesting and Zones of Influence of Class I watercoursesSlide22
Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
Time DecayTaken from
Modeling Aquatic and Riparian Systems, Assessing Cumulative Watershed Effects, and Limiting Watershed Disturbance by Menning et al as part of the Sierra Nevada Ecosystem Project 1996ERA = Equivalent Roaded AreaSlide23
Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
Next Steps in Synthesis Modeling
Subject Matter Experts agree upon inputs, values, and weightingPPWG membersOther professionals provide peer review
Ground truth resultsPublish model(s)What other data contained in THPsmight contribute to modeling efforts and characterizing the watershed?Slide24
Timber Restoration and Forest Restoration Program Pilot Project Working Group April 23, 2018
Pilot Project Working Group
Timber Regulation and Forest Restoration Program
April 26, 2018Prototyping a GIS synthesis of the Three Track Process (THP mining, watershed modeling, and air photo rapid assessment) Presenter: Francesca Rohr California Dept of Forestry & Fire Protection