WMS:Orange County Unit Hydrograph: Difference between revisions

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* [[WMS:Basin HEC-1 Cards|Basin data]]
* [[WMS:Basin HEC-1 Cards|Basin data]]
* [[WMS:OC Unit Hydro Effective Precipitation|Effective precipitation]] – losses are included in the precipitation rather than defining a loss method
* [[WMS:OC Unit Hydro Effective Precipitation|Effective precipitation]] – Losses are included in the precipitation rather than defining a loss method
* [[WMS:Basin HEC-1 Cards|Unit Hydrograph Method]] – unit hydrographs are developed using Orange County S-graphs and lag time derived from the time of concentration computed in an [[WMS:Orange County Rational Method|Orange County Rational Method]] analysis
* [[WMS:Basin HEC-1 Cards|Unit Hydrograph Method]] – Unit hydrographs are developed using Orange County S-graphs and lag time derived from the time of concentration computed in an [[WMS:Orange County Rational Method|Orange County Rational Method]] analysis
* [[WMS:Routing HEC-1 Cards|Routing]]
* [[WMS:Routing HEC-1 Cards|Routing]]
*# Stream/channel routing – a [[WMS:Routing HEC-1 Cards|convex routing method]] is included in HEC-1
*# Stream/channel routing – A [[WMS:Routing HEC-1 Cards|convex routing method]] is included in HEC-1
*# Flow-through detention – define using [[WMS:Routing HEC-1 Cards|reservoirs]] or [[WMS:Routing HEC-1 Cards|storage routing]] in HEC-1
*# Flow-through detention – Defines using [[WMS:Routing HEC-1 Cards|reservoirs]] or [[WMS:Routing HEC-1 Cards|storage routing]] in HEC-1
*# Flow-by detention – define using [[WMS:Diversion HEC-1 Cards|diversions]] in HEC-1
*# Flow-by detention – Defines using [[WMS:Diversion HEC-1 Cards|diversions]] in HEC-1


==Saving a Simulation==
==Saving a Simulation==

Revision as of 15:25, 7 April 2016

Edit Orange County Unit Hydrograph Parameters dialog

Unit hydrograph analysis is used for watersheds greater than 1 square mile (640 acres) in Orange County, California. Losses are accounted for by calculating an effective precipitation. Runoff hydrographs are computed using a unit hydrograph, which is developed using an S-graph. Use a small area hydrograph instead of a full blown unit hydrograph analysis for watersheds with a Tc < 25 min. WMS creates the input files required for HEC-1 to compute hydrographs for the Orange County unit hydrograph analysis. Much of the interface for the Orange County unit hydrograph analysis is similar to the HEC-1 interface within WMS. Some of the processes specific to Orange County are described below:

Saving a Simulation

Save only the HEC-1 input files using the Save Simulation command in the OC Rational menu. This will only save the hydrologic tree and the HEC-1 input parameters at each of the tree nodes. Terrain data, feature data, and GIS data will not be saved unless saving a WMS project file using the Save command in the File menu.

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