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County-Wide Drainage Study Using GIS

by J. J. DeVries,
T. V. Hromadka,



Document Type: Proceeding Paper

Part of: North American Water and Environment Congress & Destructive Water

Abstract:

A county-wide drainage study was conducted for the County of San Joaquin, California, Department of Public Works, for the determination of storm runoff quantities for the planning of flood management facilities, floodplain analysis, and drainage system evaluation. The hydrological analyses were based on a Geographical Information System (GIS) for nearly the entire county. Data layers incorporated in the GIS data base are base maps, rainfall isohyetal maps, land use and soil type, unit hydrograph data, watershed boundaries, stream channels and channel nodal points, node elevations, and the linkage information for the nodes.

Subject Headings: Geographic information systems | Information systems | Hydrologic data | Drainage systems | Stream channels | Floods | System analysis

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