Hydrology:
Tc - Channel Flow
- Time of concentration (Tc) for stormwater runoff
in channelized flow or shallow concentrated flow using USDA, NRCS, TR-55.
Tc - Overland Flow
- Calculate the time of concentration (Tc) for
overland flow in shallow concentrated flow across an area.
Rainfall Intensity
- Calculate the rainfall intensity (I) for
different storm frequencies using the Steel formula.
Rational Formula
- Calculate the stormwater peak discharge (qp) using the Rational Formula.
NRCS Runoff
- Calculate the USDA, NRCS, TR-55 runoff rate by curve number method.
Travel Time Average Velocity
- Calculate the average velocity for shallow concentrated flows to calculate the USDA, NRCS TR-55 travel time or time of concentration.
NRCS Runoff Volume
- Calculate USDA, NRCS TR-55 stormwater discharge runoff volume to use in detention basin storage volume calculation.
SCS Detention Volume
- Calculate detention storage volume for difference between the post development discharge and predevelopment discharge using SCS detention volume method.
Design Problem 1
- Given a 600'x600' rural parcel of pasture land located in Region 1, determine the 10 year stormwater discharge to size a culvert that will be located
on the SE corner of the property. Use the Steel formula and rational method to determine Q.
Design Problem 2
- Using the NRCS method, determine the volume of stormwater runoff that must be stored in an onsite retention pond to meet local land development regulations for a 5 acre commercial development site.
|