The 'Muskingum method' of flood routing is a:
Choose the correct answer
Hydraulic (PDE-based) method requiring detailed channel geometry
Hydrological storage-based routing using linear storage function S = K[xI+(1-x)O] — calibrated from observed data
Probability distribution method for rainfall
Only for reservoir (level pool) routing
Correct Answer
B. Hydrological storage-based routing using linear storage function S = K[xI+(1-x)O] — calibrated from observed data
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Muskingum: hydrological (lumped, storage-based) flood routing method. Storage equation: S = K[xI + (1−x)O] where K = travel time through reach, x = weighting factor (0–0.5), I = inflow, O = outflow. Routing: O2 = C0I2 + C1I1 + C2O1 (C0, C1, C2 are Muskingum coefficients in terms of K, x, Δt). K and x calibrated from observed I-O data.
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