This is for water resources Engineering. Please show steps and formulas so I can understand.
Extracted text: 2) The hydrograph given below is to be routed in a rectangular reservoir with an initial water surface elevation of 0.5 meters. The reservoir is equipped with an outflow-control weir and has the following characteristics: S = 6 x h and Q= 3 x h, where h is the height of water (m), S is the storage (m/s-day) and Q is the outflow discharge (m/s). Determine the percentage reduction in peak flow and the peak water surface elevation. Time (hr) 6:00 am 9:00 am 12:00 am 3:00 pm 6:00 pm Inflow (m³/s) 30 120 450 300 30