Hydrology:  

• Calculate the time of concentration (Tc) for stormwater runoff in channelized flow or shallow concentrated flow using USDA, NRCS, TR-55.

• Calculate the NRCS ditch flow velocity to be used for the NRCS travel time velocities in shallow concentrated or ditch flow.

• Calculate the time of concentration (Tc) for overland flow across small areas without defined channels using the kinematic wave formula.  Good for paved areas such as parking lots and streets.

• Calculate the time of concentration (Tc) for overland flow in shallow concentrated flow across an area.

• Calculate the time of concentration (Tc) for Stormwater flow using the FAA Formula.

• Calculate the time of concentration (Tc) for Stormwater flow using Kirpich's Equation.

• Calculate the time of concentration (Tc) for Stormwater flow using Kerby's Equation.

• Calculate the rainfall intensity (I) for different storm frequencies using the Steel formula.

• Calculate the stormwater peak discharge (qp) using the Rational Method.

• Calculate the stormwater runoff (Q) using the Rational formula peak discharge.

• Calculate the stormwater detention storage volume (Vs) using the Rational Formula Hydrograph Method.

• Calculate the stormwater runoff (Q) using the Modified Rational Method.

• Calculate the USDA, NRCS, TR-55 runoff rate by curve number method.

• Calculate USDA, NRCS, TR-55 composite Curve Number for area with a connected impervious area or for an area with an unconnected impervious area and a total impervious area greater than 30%.

• Calculate USDA, NRCS, TR-55 composite Curve Number for area with an unconnected impervious area and a total impervious area less than 30%.

• Calculate USDA, NRCS, TR-55 weighted Curve Number for a basin from the curve numbers and areas of its subbasins.

• Calculate the average velocity for shallow concentrated flows to calculate the USDA, NRCS TR-55 travel time or time of concentration.

• Calculate peak discharge using USDA, NRCS, TR-55 Graphical Peak Discharge Method.

• Calculate peak discharge using USDA, NRCS, TR-55 Tabular Hydrograph Method.

• Calculate USDA, NRCS TR-55 stormwater discharge runoff volume to use in detention basin storage volume calculation.

• Calculate detention storage volume for difference between the post development discharge and predevelopment discharge using SCS detention volume method.

• 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.

• 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.