Environmental Engineering Reference
In-Depth Information
Fig. 10.8
SWAT UMRB subbasin distributions
to the mainstem river will provide the necessary boundary conditions to exercise
HEC-RAS.
Modeled flow discharge, suspended sediment, total nitrogen and total phos-
phorus fluxes for a number of UMRB long-term sampling sites between 1990
through 2009 were compared with observed data. Figures 10.9 , 10.10 , 10.11 and
10.12 show the monthly modeled and observed comparison for the simulation
period. Discharge and water quality data from the UMR were acquired from the
US Geological Survey (USGS).
The difference between the measured and modeled monthly average stream
flow for all four gages was less than 10 % for the simulation period. The hydro-
graph plot revealed a strong correlation between the measured and modeled flows
as indicated by the R 2 and NSE values, which were 0.76 and 0.72, respectively at
 
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