CIVIL ENGINEERING FORMULAS

HYDRAULICS AND WATERWORKS FORMULAS 295

PRESSURE ON SUBMERGED
CURVED SURFACES

The hydrostatic pressure on a submerged curved surface (Fig. 12.2) is given by

(12.3)

where Ptotal pressure force on the surface
PHforce due to pressure horizontally
PVforce due to pressure vertically

P 2 PH^2 PV^2

A

C

(a)

(b)

E

PV =PV 1 + W

PV 1

A B

c.g.

We ight

W

PH

FH Reaction

C FV Reaction

D

B

FIGURE 12.2 Hydrostatic pressure on a submerged curved

surface: (a) Pressure variation over the surface. (b) Free-body

diagram.