KONTROL KECEPATAN 2 A = = = h 1,828 1,828 * 1,113^2 2,234 m^2 QRan. Sistem = = = = m /detik 5,212 Q/A 5,212/2,234
577 97 157KB
KONTROL KECEPATAN 2
A
= = =
h 1,828 1,828 * 1,113^2 2,234 m^2
QRan. Sistem
= = = =
m /detik 5,212 Q/A 5,212/2,234 2,334 m/detik
U
2
Karena, u > umaks = 2 m/detik maka Penampang tidak Aman, sehingga diperlukan desain ulang ke-2. DESAIN ULANG KE-2. A
=
QRan. Sistem
1,828h^2 1,828h^2 h^2 h
= = = =
umaks 5,212/2 2,606 1,425 1,194
b b b
= = =
0,828*1,270 0,989
= = = = = =
(1/n)*R^(2/3)*Sf^(1/2) (1/0,02)*(0,5*1,194)^(2/3)*So^0.5 50 X 0,709 X So^0.5 2/(50*0,709) 0,056 0,0032
jadi, nilai Sf : meaning, Umaks 2 2 So^0,5 So^0,5 So
m
0,828.h
R=0.5h
SALURAN 4 bentuk saluran tinggi saluran lebar saluran
= = =
0,60 m 0,60 m
U = (1/n). R2/3. Sf1/2 Q Q
=
A.U
=
2
2.h 2.h2
X
Q 0,623 h^(8/3)
= = =
h
=
0,455
m
b
= =
2h 0,911
m
X 5,079 0,123
X
KONTROL KECEPATAN A
QRan. Sistem U
R2/3
Sf X (1/0.02).(0.5h)^(2/3).0,0065^0.5 h^(8/3) (1/n)
2
= = =
2.h 2*0,510^2 0,415
= = = =
m /detik 0,623 Q/A 0,623/0,415 1,503 m/detik
m^2
Karena, u < umaks = 2 m/detik maka Penampang Aman.
2
1/2
Sf=So