Find the peak streamflow discharge for a rainfall of 2.4-hour duration that produces excess rainfall of 2.2 mm over a watershed using (a) Snyder Method and (b) NRCS method. The watershed characteristics are as follows. Ct is 1.25, Cp is 0.14, watershed area is 345 square km. The length of the main channel is 48 km and length of the main channel from the centroid of the watershed to the stream outlet is 19 km.
Find the peak streamflow discharge for a rainfall of 2.4-hour duration that produces excess rainfall of...
USING KIRPICH METHOD IN DETERMINING TIME OF CONCENTRATION: L 1.15 tc 51H0.385 Where: . L S H Time of concentration (minutes) Length of watercourse (m) Average basin slope (S=HL) Difference in elevation (m) i = 5.41270.1614 (10)(1+0.56)0.936 where: i = rainfall intensity(mm/h) T = Return period (years) D = rainfall duration, tc (hours) Storm water quantity can be estimated by this method. Q=C.I.A / 360 Where, Q = quantity of storm water, m3/sec C= coefficient of runoff I = intensity...