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Start Over Resource Type Polygon data Subject Hydrology

1. major basins

2005. Jones Stokes. The Napa County Watersheds were generated from two elevation datasets. The Napa River Watershed was generated from LIDAR data processed by NCALM a... Napa County (Calif.). County Of Napa.
2005. County of Napa ITS Department. Major named water bodies within Napa County. Napa County (Calif.). County Of Napa.
2005. VESTRA Resources Inc. Boundary of the Napa County Flood Control District. Napa County (Calif.). County Of Napa.
2001. Feeney, Martin B. and Rosenberg, Lewis I. This polygon shapefile contains areas for potential recharge of high to moderate infiltration capacity and low to moderate water holding capacity s... Monterey County (Calif.). Planning Department.
2010. Vestra Resources Inc. Redding CA. Sphere of Influence for the Napa County Flood Control and Water Conservation District. Napa County (Calif.). County Of Napa.
2015. Santa Clara Valley Water District (Calif.). This polygon shapefile depicts boundaries of Stormwater Runoff Catchments for outfalls greater than or equal to 18 inches in diameter, in the Count... Santa Clara Valley Water District (Calif.).
2012. Wyoming Geographic Information Sciences Center. This polygon shapefile contains the 4th level, 8-digit hydrologic unit code (HUC) sub-basin boundaries for California. A hydrologic unit is a drain... Wyoming Geographic Information Sciences Center.
2013. Wyoming Geographic Information Sciences Center. This polygon shapefile contains the 6th level, 12-digit hydrologic unit code (HUC) sub-watershed boundaries of California. This layer consists of g... Wyoming Geographic Information Sciences Center.
2004. Department of Public Works. Water bodies in San Francisco. Derived from city features drawings from DPW. Modified by DTIS to show type of water body and name. San Francisco (Calif.). Department Of Telecommunications and Information Services.
2009. Butte County (Calif.) -- Geographic Information Systems. This polygonal dataset shows all lakes, large rivers, and small water bodies within Butte County, California as shown on USGS 1:24000 maps and upda...