POD! Change in Percent Urban Land by Hydrodynamic Subregion, Upper San Francisco Estuary, California 1990-2006
Land use is an ultimate driver of many of the stressors on the Upper San Francisco Estuary, but the magnitude and pattern of land use change had not previously been analyzed. I attempted to fill this knowledge gap through a screening-level risk assessment. I compared urban land use within hydrodynamic subregions in 1990, 2000, and 2006. A GIS analysis was performed to calculate the percent of land area within each subregion that was classified as urban and built-up land by the California Farmland Mapping and Monitoring Program (http://www.consrv.ca.gov/dlrp/fmmp/) for those dates.
For the land use maps from the California Farmland Mapping and Monitoring Program for 1990, 2000, and 2006, after converting to rasters, the ArcGIS TabulateArea tool with the Hydrodynamic Subregions shapefile was used to calculate the area of each land use class. The area was divided by the total land area (excluding open water) in the subregion to convert to percentage.
Data Set Usage Rights
These data may be freely shared within the public scientific domain. They are intended to provide a general estimate of urban land use within the Upper San Francisco Estuary over time as a first level assessment of environmental effects. They are not intended to make any land use or regulatory decisions. The boundaries of hydrodynamic subregions are approximations.