WMS:TR-20 Job Control Parameters: Difference between revisions
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===Title=== | ===Title=== | ||
Enter a name and/or project description identifying the model. Two different title records up to 72 characters each can be entered. The title records will appear at the top of the TR20 input file. | Enter a name and/or project description identifying the model. Two different title records up to 72 characters each can be entered. The title records will appear at the top of the TR20 input file. | ||
===Unit Hydrograph Definition=== | |||
TR20 offers two ways of defining the unit hydrograph used to compute runoff from your watershed. The first way is to use the standard SCS hydrograph provided with TR20. Another way is to define your own input hydrograph. This can be done by selecting the '''Define another dimensionless unit hydrograph''' radio button and defining the unit hydrograph in the time series editor. | |||
===Base Flow=== | |||
==Related Topics== | ==Related Topics== | ||
Revision as of 17:30, 25 February 2013
The Job Control parameters include all of the data necessary to run a TR-20 analysis that are not a part of a basin, reach, or reservoir. The following are the specific parameters defined as part of job control:
Precipitation
In TR20, there are two different ways to define precipitation. Precipitation is defined by selecting the Job Control command from the TR20 menu. Then, select the Define Precipitation button to define precipitation over the entire watershed. You can define precipitation by using either a standard SCS rainfall distribution or by defining a custom rainfall distribution. If a custom rainfall distribution is used, you must define a custom rainfall distribution in the XY Series Editor. If one of the standard SCS rainfall distributions are used, you can select one of the following rainfall types:
- Emergency Spillway and Freeboard
- Type I: 24 hours
- Type II: 24 hours
- Type IA: 24 hours
- Type III: 24 hours
- Type II: 48 hours
For all the standard distributions, you must define the rainfall depth. For the dimensionless distribution, you must also define the rainfall duration. You only need to define the depth and/or duration of the rainfall for a custom distribution if one of the units entered in the XY Series Editor is dimensionless.
Time Control
Main Time Increment
The computational time increment defines the length in time between hydrograph ordinates. The interval should be specified in hours.
Starting Time
The starting time of the simulation is defined in this entry. The time should be specified as floating point number of hours past midnight. For example 7:45 am would be entered as 7.75 and 1:20 p.m. as 13.33.
Title
Enter a name and/or project description identifying the model. Two different title records up to 72 characters each can be entered. The title records will appear at the top of the TR20 input file.
Unit Hydrograph Definition
TR20 offers two ways of defining the unit hydrograph used to compute runoff from your watershed. The first way is to use the standard SCS hydrograph provided with TR20. Another way is to define your own input hydrograph. This can be done by selecting the Define another dimensionless unit hydrograph radio button and defining the unit hydrograph in the time series editor.
Base Flow
Related Topics
WMS – Watershed Modeling System | ||
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