South Orange County Hydrology Model
SOHM Features
The purpose of SOHM is to size hydromodification management or flow control facilities to mitigate the effects of increased runoff (peak discharge, duration, and volume) from proposed land use changes that impact natural streams, wetlands, and other water courses. SOHM provides:
A uniform methodology for South Orange County
A more accurate methodology than single-event design storms
An easy-to-use software package SOHM is based on:
Continuous simulation hydrology (HSPF)
Actual long-term recorded precipitation data
Measured pan evaporation data
Existing vegetation (for predevelopment conditions)
Regional HSPF parameters