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| The HEC-1 Interface tools in WMS can be used to develop a working HEC-1 model. It is important that this model be running effectively (i.e. calibrated and/or adjusted to give credible results) prior to using it for the Stochastic Modeling simulation.
| | #redirect [[WMS:Stochastic_Modeling#Step_1._Develop_a_hydrologic_model_with_HEC-1]] |
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| [[Image:image85.jpg]]
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| The only parameters at this point that can be varied within a range of probable answers are rainfall and CN (curve number for the different basins. This is done by setting the [[WMS:Basin HEC-1 Cards#Precipitation...|precipitation]] or [[WMS:Basin HEC-1 Cards#SCS Loss Method (LS)|CN]] to be a negative number in their respective dialogs. This negative number is a key number and should be unique for each stochastic variable you create. When running the stochastic simulation WMS will substitute the simulation specific parameter for the defined key. You can then setup a stochastic variable for HEC-1 in the ''Stochastic Run Parameters'' dialog. A key value (matching the key you defined in the materials property) starting value, min value, max value, standard deviation and distribution type.
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| [[WMS:Hydraulic Model|Next Step in Stochastic Modeling]]
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| ==Related Topics==
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| *[[WMS:Stochastic Modeling|Stochastic Modeling]]
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| *[[WMS:HEC-1 Parameters|HEC-1 Modeling]]
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| *[[WMS:Basin HEC-1 Cards#Precipitation...|Precipitation Data]]
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| *[[WMS:Basin HEC-1 Cards#SCS Loss Method (LS)|Curve Number]]
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| {{WMSMain}}
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