Alameda County Flood Control & Water Conservation District's updated Alameda County Hydrology & Hydraulics Manual defines current practice in the hydrologic and hydraulic design of all flood control facilities in Alameda County that are subject to District approval. The guidelines and hydrologic computation techniques in the manual are applicable for hydrologic and hydraulic studies and design beginning January 1994 for the District's large open-channel projects, and for all projects effective October 2016.

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    The Alameda County Hydrology & Hydraulics Manual may be downloaded free of charge. Detailed data for mean annual precipitation, slope, and hydrologic soil group may also be downloaded free of charge and used with geographical information system (GIS) software to perform hydrologic overlay computations. The District may update the manual and data files in the future.

    To receive notifications of manual or data file updates, please provide your contact information.

Hydrology and Hydraulics Manual