WMS:HEC-1 Parameters: Difference between revisions

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[[Image:image190.jpg|thumb|470 px]]
[[Image:Edit HEC-1 Parameters.png|thumb|470 px|''Edit HEC-1 Parameters'' dialog]]
Attributes or parameters for all HEC-1 hydrograph stations are defined and/or later edited using the ''Edit HEC-1 Parameters'' dialog. This dialog is accessed by selecting the '''Edit HEC-1 Parameters''' command from the ''HEC-1'' menu or by double-clicking on basin, outlet, or diversion icon from the ''Graphics Window''.
Attributes or parameters for all HEC-1 hydrograph stations are defined and/or later edited using the ''Edit HEC-1 Parameters'' dialog. This dialog is accessed by selecting the '''Edit HEC-1 Parameters''' command from the ''HEC-1'' menu or by double-clicking on basin, outlet, or diversion icon from the Graphics Window.


If a basin, outlet, or diversion is selected before issuing the command then data for that object appears in the text window at the bottom of the dialog. The top portion of the dialog lists the HEC-1 cards that can be edited by selecting the corresponding button. When a hydrograph station is selected (basins/outlets/diversions) only the buttons that edit parameters associated with that hydrograph station are active, all others are dimmed. In addition to using the appropriate button, HEC-1 attributes can be edited by clicking on the HEC-1 card in the text display window. Using this method, job control parameters can be edited by first toggling their display using the ''Display Job Control Cards'' toggle box, and then selecting a job control card from the text display window.
If a basin, outlet, or diversion is selected before issuing the command then data for that object appears in the text window at the bottom of the dialog. The top portion of the dialog lists the HEC-1 cards that can be edited by selecting the corresponding button. When a hydrograph station is selected (basins/outlets/diversions) only the buttons that edit parameters associated with that hydrograph station are active, all others are dimmed. In addition to using the appropriate button, HEC-1 attributes can be edited by clicking on the HEC-1 card in the text display window. Using this method, job control parameters can be edited by first toggling their display using the ''Display Job Control Cards'' toggle box, and then selecting a job control card from the text display window.


Once the dialog appears it becomes part of the main screen until you select the '''Done''' button. Therefore, you can continue to select additional, or other hydrograph stations so that data for that object may be edited without exiting the dialog. You can use the previous and next hydrograph station buttons to cycle through hydrograph stations in the order they are computed by HEC-1. Since the dialog is part of the main screen, all menu commands are active while this dialog is present.
Once the dialog appears it becomes part of the main screen until the '''Done''' button is selected. Therefore, it is possible to select additional, or other hydrograph stations so that data for that object may be edited without exiting the dialog. Use the previous and next hydrograph station buttons to cycle through hydrograph stations in the order they are computed by HEC-1. Since the dialog is part of the main screen, all menu commands are active while this dialog is present.


==Basin HEC-1 Cards==
*[[WMS:Basin HEC-1 Cards|Basin HEC-1 Cards]]
===Basin Data...===
*[[WMS:Routing HEC-1 Cards|Routing HEC-1 Cards]]
===Output Control...===
*[[WMS:Diversion HEC-1 Cards|Diversion HEC-1 Cards]]
For each hydrograph station (basin hydrographs, combined hydrographs, and routed hydrographs) different output controls can be specified. This dialog is accessed by selecting the ''Output Control'' dialog button from the ''Edit HEC-1 Parameters'' dialog. Entries which can be defined in this dialog are described below.
 
====Routed and Combined Hydrographs at Outlets====
 
In WMS an outlet point is used to represent locations where hydrographs are both combined and then routed. Therefore, if an outlet is selected before choosing the ''Output Control'' dialog, a radio group at the top of the dialog appears so that you may specify whether the options should be applied to the combined or routed hydrograph. If a basin is selected the radio group at the top of the dialog does not appear.
 
====Comment Lines (KM)====
 
Individual comments can be defined for each hydrograph station. These comments can be used to identify unique characteristics about a particular basin or outlet point. A new comment can be defined by selecting the new button in the ''Output Control'' dialog and then entering the comment in the text entry. When more than one comment card has been defined, the up and down arrow buttons can be used to scroll through the list of comments for that hydrograph station. When using WMS, comment cards always appear directly after the KK cards for each hydrograph station.
 
====Output Control (KO)====
 
These controls determine what information about a given hydrograph station is written to the HEC-1 ASCII output file. By default the IO record information is used. However, you may wish to print out a more (or less) complete summary for individual hydrograph stations.
 
By default, the option to write a hydrograph to the TAPE22 file is specified. This is the file read by WMS for display of hydrographs. Therefore, this option should only be changed to suppress particular hydrographs.
 
===Precipitation...===
Precipitation patterns are assigned to basins by first selecting the appropriate basin(s) and then clicking on the precipitation button in the ''Edit HEC-1 Parameters dialog''. If multiple basins are selected then the defined parameters will apply to all selected basins.
 
'''NOTE:''' If no basins are selected, the parameters can be applied to all basins.
 
====HEC-1 No Precipitation====
If no precipitation for a given basin is chosen, then the program will use the precipitation pattern of the most recently defined basin. In other words, if the same precipitation pattern is to be used for each basin, specify precipitation at the upper-most basin and let all other basins "inherit" this same pattern.
 
====Probable Maximum Precipitation (PM)====
Defining precipitation using the probable maximum precipitation option allows for the computation of the probable maximum storm according to the outdated Hydrometeorological Report No. 33 (HMR 33). This does use an outdated method and has been retained in HEC-1 for now in order to be able to reproduce results according to the old HMR 33 method.
 
The following variables must be defined:
 
* PMS – The probable maximum index precipitation from the HMR 33.
* TRSPC – Precipitation adjustment (between 0 and 1.0) based on drainage area size. If this value is set at zero HEC-1 will default it to the appropriate value based on the HOP Brook Adjustment Factor as described in the HEC-1 manual.
* TRSDA – The drainage area in square miles for which the storm is transposed.
* SWD – This value can be set to the EM 1110-2-1411 criteria or the Southwestern Division criteria.
* R6, R12, R24, R48, R72, R96 – Maximum precipitation at the specified hourly intervals as a percentage of the probable maximum storm. The R48, R72, and R96 values are optional
 
===Loss Method...===
One of several different loss methods can be chosen when generating synthetic hydrographs. A loss method is assigned to a basin by first selecting the basin and then choosing the '''Loss Method''' button in the ''Edit HEC-1 Parameters dialog''. As with other basin data the same parameters can be assigned to several basins by selecting multiple basins before accessing the ''Loss Method'' dialog.
 
When defining a kinematic wave model, it may be necessary to define a separate set of loss parameters for the two different [[WMS:HEC-1 Kinematic Wave (UK)|UK records]] (generally corresponding to pervious and impervious area). This second set of loss parameters is defined from within the [[WMS:HEC-1 Unit Hydrograph Methods|Unit Hydrograph Method]] dialog.
 
===Unit Hydrograph Method...===
One of several different unit hydrograph methods can be chosen when generating synthetic hydrographs. A method is assigned to a basin by first selecting the basin and then choosing the Unit Hydrograph Method button from the ''Edit HEC-1 Parameters'' dialog. As with other basin options the same parameters can be assigned to several basins by selecting multiple basins before accessing the ''Unit Hydrograph Method'' dialog.
 
===Snow Melt Data...===
When snow needs to be considered in the runoff analysis, snow melt data for a basin needs to be defined. HEC-1 has two different methods for computing snowfall/melt simulations: the Degree-Day method, and the Energy-Budget.
 
To define data for a selected basin, choose the '''Snow Melt Data''' button from the ''Edit HEC-1 Parameters'' dialog. The toggle at the top of the dialog turns snow calculations on. For both methods the elevation or zone data, the coefficients, and temperature data must be defined.
 
The Degree-Day method is set up once these parameters have been defined. If the Energy-Budget method is toggled on then the Dew point, Short-wave radiation, and Wind speed data must be defined as well. Losses should be defined when either method is used. These losses are used in conjunction with the LU or LE cards for normal basin losses. The check box at the bottom of the dialog allows losses to be turned on or off for a given simulation.
 
==Routing HEC-1 Cards==
===Routing Data...===
===Output Control...===
See ''Output Control...'' section under ''Basin HEC-1 Cards''.
===Resevoir Data...===
===Channel Data...===
 
==Diversion HEC-1 Cards==
===Diversion Data...===
===Output Control...===


==Related Topics==
==Related Topics==
* [[WMS:HEC-1 Job Control|Job Control Data]]
* [[WMS:HEC-1 Job Control|Job Control Data]]
* [[WMS:HEC-1 Basin Name (KK)|Basin Data]]
* [[WMS:HEC-1#Model_Check|Model Check]]
* [[WMS:HEC-1 Loss Methods|Loss Method]]
* [[WMS:HEC-1#Run_Analysis|Running an HEC-1 Analysis]]
* [[WMS:HEC-1 Unit Hydrograph Methods|Unit Hydrograph Method]]
* [[WMS:HEC-1 Precipitation|Precipitation]]
* [[WMS:HEC-1 Snow Melt Simulations|Snowmelt]]
* [[WMS:HEC-1 Routing Methods|Routing]]
* [[WMS:HEC-1 Reservoirs|Reservoirs]]
* [[WMS:HEC-1 Diversions|Diversions]]
* [[WMS:HEC-1 Output Control (KO)|Output Control]]
* [[WMS:HEC-1 Model Check|Model Check]]
* [[WMS:HEC-1 Run Analysis|Running an HEC-1 Analysis]]




{{WMSMain}}
{{WMSMain}}
[[Category:HEC-1|P]]
[[Category:WMS Parameters|H]]
[[Category:HEC-1 Dialogs]]

Latest revision as of 22:11, 13 July 2020

Edit HEC-1 Parameters dialog

Attributes or parameters for all HEC-1 hydrograph stations are defined and/or later edited using the Edit HEC-1 Parameters dialog. This dialog is accessed by selecting the Edit HEC-1 Parameters command from the HEC-1 menu or by double-clicking on basin, outlet, or diversion icon from the Graphics Window.

If a basin, outlet, or diversion is selected before issuing the command then data for that object appears in the text window at the bottom of the dialog. The top portion of the dialog lists the HEC-1 cards that can be edited by selecting the corresponding button. When a hydrograph station is selected (basins/outlets/diversions) only the buttons that edit parameters associated with that hydrograph station are active, all others are dimmed. In addition to using the appropriate button, HEC-1 attributes can be edited by clicking on the HEC-1 card in the text display window. Using this method, job control parameters can be edited by first toggling their display using the Display Job Control Cards toggle box, and then selecting a job control card from the text display window.

Once the dialog appears it becomes part of the main screen until the Done button is selected. Therefore, it is possible to select additional, or other hydrograph stations so that data for that object may be edited without exiting the dialog. Use the previous and next hydrograph station buttons to cycle through hydrograph stations in the order they are computed by HEC-1. Since the dialog is part of the main screen, all menu commands are active while this dialog is present.

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