![]() ![]() Historic record keeping is central to the efforts of the District’s Hydrography team.The official website of the Ventura County Public Works Agency. Hydrography is the science that measures and describes the physical features of bodies of water and the land areas adjacent to those bodies of water. Sediment/Debris Bulking Factors And Post-Fire Hydrology for Ventura County Information about the District’s Debris and Detention Basins can be obtained from the Manuals available on our Basin Manual Webpage. For information on these advanced methods, please contact the Hydrology Section at (805) 654-2069 or email your request to and Detention Basin Information Other peak flow design methods that have been used to evaluate floodplains include the results from flow frequency analyses and inserting design storm rainfall in continuous models such as HSPF. Peak flows and hydrographs for regional facility design can be evaluated using the calibrated S-Graph developed from 2005 storm data using HEC-HMS. In general, peak flows from urban and small undeveloped watersheds for use in channel design can be evaluated using our modified rational method and programs (VCRat2.64, TC Calculator). Please see the 2017 update of the VCWPD Hydrology Manual and our design hydrology programs through the above link.
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