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Hydrology & Hydraulics

Hydrology is the scientific study of the waters of the earth, especially how rainfall and evaporation affects the flow water in streams and storm drains. Hydraulics is the engineering analysis of the flow of water in channels, pipelines, and other hydraulic structures.

Hydrology and hydraulics are a key part of the Alameda County Flood Control District's work. It serves as the scientific foundation for all of the District’s planning, design, and construction projects.

The Flood Control District collects hydrologic data in the form of precipitation and stream flow measurements. District staff and its consultants use sophisticated software tools to model the hydrology and hydraulics of the District’s flood control system. The District has also developed a Hydrology & Hydraulics Manual that outlines the District's requirements for new developments and modifications to existing flood control systems.