Frequently Asked Questions (FAQ)

For Hydrology calculations, would county approve of the use of HEC-HMS or only the MODRat?

MODRAT is the approved County Hydrology Model. The HEC-HMS is used for our mountain watersheds (dams).

For more information, please contact Dr. Iraj Nasseri at the Los Angeles County Department of Public Works, Water Resources Division, Hydrology Section at 626-458-6124.

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