HYDRAULIC GRADE LINE COMPUTATION FORM

HYDRAULIC GRADE LINE COMPUTATION FORMFIGURE 6-3

Computed:

Date:

Route:

Section:

Checked:

Date:

County:

Station & Offset

(1)(2)Q

(3)V

(4)R

(5)L

(6)n

(7)h

(8)Hf(9)He(10)Hi(11)Hs(12)Ht(13)TW

(14)HGL

(15)TOS

(16)CL

(17)

Junction

FromJunction

ToDia.

ftFlow

ft3/SVel.

ft/sHydraulic

radius

ftLength

ftManning'sVel.

Head

ftFric.

Loss

ftExit

Loss

ftEntr.

Loss

ftStruct.

Loss*

ftTotal

Head

Loss

ftTail-

water

Elev.

ftHead-

water

Elev.

ftTop of

Struct.

Elev.

ftTOS-

HGL

ft

h=Velocity head,=(V)2/2g

Hi = Entrance Loss = Ki(V)2/2g

Refer to Table 6-3 for values of Ki Hf=Friction Loss,=29.14N2LX(V)2

He = Exit Loss, He = (V)2/2g

R1.33

2g

* For structural (junction) losses in inlets, manholes, see Figure 6-3.