Vegetation Classification and Mapping Pilot Project, Alameda Watershed

Nomad Ecology conducted a pilot vegetation mapping project on 5,894 acres of SFPUC-owned lands in the Alameda Creek Watershed west and north of Calaveras Reservoir. The vegetation classification and mapping study area extends from just south of the Sunol Water Treatment Plant to the southern boundary of SFPUC-owned lands. The purpose of the vegetation classification and mapping effort was to describe and map vegetation communities occurring in the study area.

The vegetation mapping resulted in 386 polygons with an average polygon size of 15 acres. The most commonly mapped vegetation communities were Mediterranean naturalized annual and perennial grassland and Quercus agrifolia Alliance (coast live oak woodland) (44.7% and 21.2% of the study area, respectively). Nomad prepared a report that provided a summary of the data collection, classification, and mapping methodology, environmental setting, and a summary and description of all vegetation communities classified and mapped.

The goals of the project were to:

  1. Sample, classify, and map shrub and tree dominated vegetation communities using the Manual of California Vegetation (Sawyer et al. 2009) and protocols developed by California Native Plant Society/California Department of Fish and Wildlife for vegetation data collection and classification
  2. Provide a detailed vegetation map of the study area
  3. Provide a report summarizing the methods used and descriptions of the vegetation communities in the study area
  4. Complete a pilot project to demonstrate the level of detail that can be provided through fine-scale vegetation mapping of a portion of the watershed.

PROJECT LOCATION: Alameda Watershed, Alameda County, California
CLIENT: San Francisco Public Utilities Commission and City/County of San Francisco

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