P2 P7 -P6- P5 Catchment boundary _‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒ b) A rainfall event has occurred on the catchment shown in Ques

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P2 P7 P6 P5 Catchment Boundary B A Rainfall Event Has Occurred On The Catchment Shown In Ques 1 (123.55 KiB) Viewed 41 times

P2 P7 -P6- P5 Catchment boundary _‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒ b) A rainfall event has occurred on the catchment shown in Question a) above and the rainfall that was recorded at each gauge is listed in the following table. The losses from this storm event are Initial Loss = 25 mm and Continuing Loss = 5 mm/hr. Calculate the total volume of runoff from the event using the Thiessen polygon weights previously calculated. [7 marks] Time P1 P2 P3 P4 P5 P6 P7 (hours) (mm) (mm) (mm) (mm) (mm) (mm) (mm) 0 3 7 3 5 10 0 30 1 22 18 22 20 15 0 50 2 20 70 28 27 24 0 89 3 5 15 20 20 28 10 77 4 4 3 0 1 10 70 5 0 50 sed c 1300.0 0 0 dien 1 0 P4 2 P1 0 P3 0 I