SALURAN PRIMER DAN SEKUNDER
Penampang ekonomis ( TRAPESIUM ): Rumus =
b + 2zy = 2y√ 1 + 2 b + 2(0,5)y = 2y 1+(0,5) 1 +(0,5)2 b + y = 2y (1,12) b + y = 2,24y b = 1,24y
Rumus Luas = A = ( b + zy )y A = ( 1,24y + 0,5y )y A = 1,74 2 Rumus Keliling Basah =
P = b + 2y √ 1 + 2 P = 1,24y + 2y(1,12) P = 1,24y + 2,24y P = 3,48y
2/3 /2 . . .A . A 2/3 = √ (,3)(,3) A 2/3 = =0.874 ,47 √ ,47
Rumus debit = Q =
Perbandingan A 2/3
=
,74 2/3 [ 3,48 ] = 0,874
1,74 2 .
1,091 8/3 = 0,874
8/3 = 0,874/1,091 Y = 0,94 Rumus Kecepatan = V = Q/A V = 1,53/1,74(0,94)2 V=1
SALURAN TERSIER
Penampang ekonomis ( PERSEGI ) Rumus =
B = 2y
Rumus Luas =: A = b . y A = 2y . y A = 2 2 Rumus Keliling Basah =:
P = b + 2y P = 2y + 2y P = 4y
Rumus debit = Q =
2/3 /2 . . .A
A 2/3 =
. √
A 2/3 =
(,2)(,3) =0.208 √ ,6
Perbandingan A 2/3 =
2 2 .
2 2/3 [ 4 ] = 0,208
1,26 8/3 = 0,208
8/3 = 0,208/1,26 Y = 0,51 Rumus Kecepatan =
V = Q/A V = 0,20/2(0,5)2 V=1
~ 0,5 cm
