:

_ . _ _ .

:_ _

: : b Qtheorical = 2/3 * b * *H3/2 : b = 30 cm = 0.5 mQtheorical : 2 :Qtheorical = 8/15 * tan * * H5/2 900 . 450 = 900 = 2 Qact = m / t * : m3 / sec : Qact Kg : msec : t( t=17 0c : (999 =: H = H - gauge reading :H : gauge reading H0 H0 :

H0 = 74.5 mm : H0 = 72 mm :

Qact = cd * Qtheorical :Cd :

:

. Qact-H_

H . .

. log H Log Qact _

. . . Cd Qact Cd_

. Cd Cd . Log Qact log H Q=kHn k n_ .Q=kHnLog Q = log k + n log H .Log K n : Log H Log Qact = n = -4.154-(-3.06)/1.0128-1.825 = 2.871 :n = -3.924 (-3. 0555) / 1. 32 1.701 = 2.279 : k n :Q1= 0.00087H1=0.06686Q2=0.00007H2=0.0103n = 1.347 log k = -1.533k = 0.029

:Q1 = 0.00088 Q2 = 0.000119 H1 = 0.0503H2 = 0.0209n = 2.27log k = -0.388k = 0.409 : k n :Qtheorical = 2/3 b H3/2Q= * 0.3 * 3/2(*H1.5 Q = 0.885 * H 1.5 : k=0.885 n=1.5 :Qtheorical = 8/15 tan H5/2Q=2.36*H2.5 k=2.36 n=2.5 .n n k

cd n n_ .k Qact = cd Qtheorical :kHn=Cd* 2/3 bHnCd=k / [ 2 / 3 * b* ]Cd = 0.885 / [2/3*0.3*] = 0.997 :K * Hn =Cd* 8/15 * tan * HnCd=k/[8/15 * tag * ]Cd = 2.36 / [8/15 * tan 45 * ] = 0.998

:

:gauge reading = 7.64 mm H0 = 74.5 mm H= gauge reading H0 = 74.5 7.64 = 66.86 mmM = 24 kgt = 27.46 sec = 999 kg / m3Qact = m / * t = 24/999 * 27.46 = 0.00087 m3/sQthe = 2/3 * 0.3 * * (66.86)1.5 = 0.0153 m3/sQact= cd * Qthe cd = 0.00087/0.0153 = 0.0568

:H0 = 72 mmGuage reading = 21.7 mmH = H0 guage reading = 72 21.7 = 50.3 mmQact = m / *t = 18 / 999 * 20.6 = 0.00088 m3/sQthe = 8/15tan45*H2.5=8/15tan 45* * ( 0.0503)2.5= 0.00133Qact= cd * Qthe cd = 0.00088 / 0.00133 = 0.661

:

1 Cd .

:

:

Log Q Log H1- . 2- . 1 Cd .3- ) H ( ...4- Q=kH : .

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