Preliminary Maps Showing Rainfall Thresholds For Debris-Flow Activity, San Francisco Bay Region, California

This report is a digital database package containing both plotfiles and Geographic Information Systems (GIS) databases of maps of rainfall thresholds for debris-flows in the San Francisco Bay Region, as well as the location of rain-gages and Alert-stations used in producing the model. The data are provided, only for the region as a whole, in two formats. The data are provided as ARC/INFO (Environmental Systems Research Institute, Redlands, CA) coverages and grids for use in GIS packages, and as PostScript plotfiles of formatted maps similar to traditional U.S. Geological Survey map products. [Summary provided by the USGS.]