Perhitungan Metode Gravimetrik Tank.docx

PERHITUNGAN METODE GRAVIMETRIK TANK Lebar saluran

(b) = 0,075

Slope

(S) = 0,001

Beban Air

(W) = 15

Waktu Detik

(T) = t1 + t2 / 2

Q=W/T Q1 = W / T1 = 15 / 9,51 = 1,577287066 lt/det V = 10-3 . Q / a V1 = 10-3 . Q1 / A1 = 10-3 . 1,577287066 / 0,0040125 = 0,39309335 m/det Q2 = W / T2 = 15 / 10,435 = 1,437470053 lt/det V2 = 10-3 . Q2 / A2 = 10-3 . 1,437470053 / 0,003075

= 0,467469936 m/det Q3 = W / T3 = 15 / 22,54 = 0,665483585 lt/det V3 = 10-3 . Q3 / A3 = 10-3 . 0,665483585 / 0,0019875 = 0,334834508 m/det

PERHITUNGAN METODE CURRENT METER T = 10 detik Po = Jumlah Pulsa A = 0,12 B = 0,005 N1 = (Po1 + Po2 + Po3) / S.T = (56,2 + 56,4 + 56,7) / 0,001 . 10 = 16930 N1 = (Po1 + Po2 + Po3) / S.T = (53,5 + 53 + 53) / 0,001 . 10 = 15950 N3 = (Po1 + Po2 + Po3) / S.T = (33,4 + 32,9 + 32,4) / 0,001 . 10 = 9870 V = A.N + B V1 = A.N1 + B = 0,12 . 16930 + 0,005

= 20366 cm/dt V2 = A.N2 + B = 0,12 . 15950 + 0,005 = 1914,005 cm/dt V3 = A.N3 + B = 0,12 . 9870 + 0,005 = 1184,405 cm/dt

METODE PITOT Slope

(S) = 0,001

H = ( h1 + h2 + h3 ) / 2 H1 = 0,75 H2 = 2,4 H3 = 2,25 V = Cp √ 2 . gh V1 = Cp √ 2 . gh1 = 15 V2 = Cp √ 2 . gh2 = 48 V3 = Cp √ 2 . gh3 = 45