Question

PLease explain this.

FICURE P4.1 Problems P4.3-P4.8 and P4.11-P4.12 ? 2

Answer 1

Given, So0 000 n minitdl, loy chamdl hauing 0-013 5ft &-50 cfs a Trap zadal channd far the chamnl bdhnd the pant . lt to ind tut Nimmal duph 4 cnfital dyşh. t Namal doth

T- 54y g (5+2%)3X3 on sduhe abue equation by a Thal-and-emmy ths Critieal depthe un at pant A fram) fantA, backwater Calculations all be done usry paint A Charel butan at d ot pnt s tune a doftun auminy 0idh is egual to mean neo lued Hence, zn :0 .

ed .. The bottom nape and distana inkmal au w f de 10000 5 50 yc O-0050

Enigy in) e sane Dipths at Stahn x 4 so are aduwted until the Trtal energy at stahon 0125 au balanced Sp Uls Cat 1.0 2

Station	Water surface elevation at the station, Z	ASSUME Depth of Flow in ft, y	Area of Flow, A (Sq.ft)	Mean Velocity, V (ft/s)	Velocity head in ft, (v2/2g)	R^(4/3)	Friction Slope, Sf	Average Friction Slope, (Sf)	Length of reach between the stations (Delta x)	Friction loss in the reach, hf (10x11)	Total Energy in ft, H (2+3+6+12)
1	2	3	4	5	6	8	9	10	11	12	13
0	0	3.2205	36.846	8.14	1.03	2.35	0.002165	0.002031	25	0.0508	4.302
25	0.0025	3.323	38.700	7.75	0.93	2.43	0.001897	0.001695	25	0.0424	4.302
50	0.0050	3.515	42.285	7.09	0.78	2.59	0.001494				4.302

Hence from the calculations, the depth of flow at 50m upstream is found out to be 3.515m from standard step method.