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| [[Image:image85.jpg|thumb|400 px]]
| | #redirect [[WMS:Stochastic_Modeling#Step_1._Develop_a_hydrologic_model_with_HEC-1]] |
| 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.
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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 created. When running the stochastic simulation WMS will substitute the simulation specific parameter for the defined key. Then setup a stochastic variable for HEC-1 in the ''Stochastic Run Parameters'' dialog. A key value (matching the key 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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