Mechanical Fuel Treatment Feasibility - Sonoma County

This version was reprojected to NAD_1983_StatePlane_California_II_FIPS_0402_Feet and Resampled from a 5ft resolution to a 90ft resolution to allow for Data Basin uploading.

The treatment feasibility raster was created using raster overlay analysis to classify the landscape into 8 classes, which are depicted in the Mechanical Fuels Treatment Feasibility raster’s ‘LABEL’ attribute. The classes are as follows:

• Feasible – Road Access, Mechanical

• Feasible – Road Access, Hand Crew

• Feasible – Not Near Mapped Roads/Trails, Hand Crew

• Feasible – Not Near Mapped Roads/Trails, Mechanical

• Limited Feasibility – Steep

• Low Feasibility – Near Stream or Riparian Veg/Wetland/Water

• Low Feasibility – Serpentine

Table 1 shows the link where the Treatment Feasibility GeoTiff can be downloaded.

Table 1. Sonoma County Mechanical Fuels Treatment Feasibility data product availability

Description Link GeoTiff https://fuelsmapping.com/sonoma_treat_feas

Table 2. Spatial data used in the Sonoma County Mechanical Fuels Treatment Feasibility analysis

Category Datasets Serpentine Vegetation

Sonoma Veg Map, 2017. We used the ‘ SERP_FLAG ’ attribute.

Water, riparian vegetation, wetlands, and streams Sonoma Veg Map, 2017 for riparian vegetation (buffered by 50 feet), water bodies, and wetlands; Sonoma lidar derived thalwags for streams (reaches with upstream catchment area greater than 1500 acres were selected and buffered by 100 feet) Roads and Trails Roads from multiple data sources including Sonoma County, CAL FIRE LNU, Open Street Map, and the Sonoma County Impervious Surfaces Map (2015); Trails from multiple sources. Roads were buffered by 1500 feet; trails were buffered by 200 feet. Slope Slope derived from the 2017 countywide high density lidar, can classified into percent slope ranges as shown in the attribute descriptions below and in Figure 1.

Table 3. Attributes in the mechanical treatment feasibility raster

Attribute Name Attribute Description Value Unique raster ID Count Count of 5x5 ft. pixels NOT_WET

1 = Not water, riparian veg, wetland , or within 100 feet of a stream; 0 = Water, riparian veg, wetland, or within 100 feet of a stream .

NEAR_ROAD 1 = Within 1500 feet of a road; 0 =Not within 1500 feet of a road NEAR_TRAIL 1 = Within 200 feet of a trail; 0 =Not within 200 feet of a trail SLOPE25 1 = Slope <= 25%; 0 = Slope not <= 25% SLOPE25_45 1 = Slope > 25% and <= 45%; 0 = Not(Slope > 25% and <= 45%) SLOPE45 1 = Slope > 45%; 0 = Slope not > 45% SERP 1 = Serpentine vegetation; 0 = Not serpentine vegetation LABEL The feasibility class. See list on previous page. Use this for displaying the layer. FINESCALE Fine scale vegetation map class from the Sonoma Fine Scale Map (2017) FOREST_LF Enhanced lifeform class from the Sonoma Fine Scale Veg Map (2017)

Figure 1. Logic model for Sonoma Mechanical Fuels Treatment Feasibility Raster

(see full project datasheet - https://fuelsmapping.com/sonoma_treat_feas_ds

Data Limitations:

This is a model of mechanical treatment feasibility based on the best available datasets and a number of assumptions. Conditions on the ground may be different than what the model shows. Disclaimer:

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