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Derive SMA parameters using the SSURGO

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Dear WMS Developer and User,

I'm working on a project of long-term runoff simulation using the SMA, and need some advices on how to determine SMA parameter values based on the SSURGO soil database.

Any help is greatly appreciated.

Shuhai Zheng

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Hi Shuhai,

I have attached a PowerPoint presentation (PDF file) that explains how to get the SMA parameters. It does not go into detail about how to determine the parameters from SSURGO soil data, but it has references to other documents that might have this information.

Once you have determined some initial values for all the parameters, I have found that the calibration tools in HMS are sometimes helpful for determining final SMA values.

We'd be interested to know what you find out about how to get SMA parameters from SSURGO data.




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