The 'reservoir routing' method (Puls method / level pool routing) solves for:
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Flow velocity profile in river cross-section
Outflow hydrograph from a reservoir given inflow, using continuity equation and storage-outflow-elevation relationship
Sediment trap efficiency in reservoir
Evaporation from reservoir surface
Correct Answer
B. Outflow hydrograph from a reservoir given inflow, using continuity equation and storage-outflow-elevation relationship
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Level-pool (Puls) routing: reservoir has horizontal water surface (level pool). Given inflow hydrograph I(t): solve storage-outflow continuity equation S + O×Δt/2 = S_prev + (I_prev+I)×Δt/2 − O_prev×Δt/2. Storage-outflow-elevation relationship (S−O curve) pre-computed. At each time step: find outflow O and storage S. Gives outflow hydrograph from reservoir (attenuated peak, delayed timing).
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