A Study on Design Flow for River Water Quality Modeling during Storm Periods(Ⅱ)

For a design flow, Q75 is used in river
quality simulation in Taiwan and Q7,10 is
used in U.S.A. No matter using Q75 or
Q7,10, it emphasizes the flow in the dry
period, and it only takes account of point
The purpose of this research is to investigate
the transport of the nonpoint source pollution
during the storm period. This research use the
NPSM model of the BASINS developed by
U.S. EPA and the CE-QUAL-RIV1, one
dimensional river water quality model, to
simulate the transport of the nonpoint source
pollution during the storm period, and
compare the difference of the river water
quality between the storm and dry periods.
Finally, the design storm and design flow for
nonpoint source pollution simulation in a river is decided.