FE Civil Hydrology Exam Questions and Answers 100% Pass

FE Civil Hydrology Exam Questions and Answers 100% Pass Total Percipitation equation - Total percipitation=initial abstraction+infiltration+surface runoff Damage categorization of floods - Nuisance, damaging, and devastating Parameter required to design culverts and storm drains - Peak runoff Rational Method equation - Q=CIA Q=Peak runoff (in-ac/hr or C=runoff coefficient I=rainfall intensity (in/hr) A=area (acres) Rational method assumptions - Constant rainfall 2 Katelyn Whitman, All Rights Reserved © 2025 Recurrence interval for peak flow is same as for design storm Runoff coeff is constant Usage of method only valid for small areas NRCS rainfall runoff method equation - Q=(P-0.2S)^2/(P+0.8S) Q=total runoff (in) P=gross rain (in) S=storage capacity (in) NRCS rainfall runoff method assumptions - Exponential decay of infiltration Losses from interception, storm period evap, depression storage, infiltration assumed 20% of storage area Conservation equation - Q=Av Q=flow A=area v=velocity 3 Katelyn Whitman, All Rights Reserved © 2025 Bernoulli's Equation parameters - Pressure energy + kinetic energy + potential energy *Does not take into account friction losses Energy conservation equation - Same as Bernoulli's Equation but friction flows are considered in equation Hydraulic radius equation - Cross sectional area / wetted perimeter Manning's Equation - Equation used to estimate velocity of flow in open channel v=(K/n)Rh^(2/3)S^(1/2) Hazen-Williams Equation - Equation