WATER TANK SIZE AND CAPACITY CALCULATION - LCETED

WATER TANK SIZE AND CAPACITY CALCULATION

For multi-storey building or high-level project, we will obtain an approved design plan from the architect for dimensions of water tanks. But for small residential building, we can estimate its tank size. So read this article to know how to design tank size

POINTS TO REMEMBER FOR TANK SIZE DESIGN

1.  I.S. code sets a limit for water consumption between 135 and 225 litres per capita per day (/pcd).

2. Under normal circumstances (according to the I.S. Code), the minimum domestic water demand for a city or town with a complete flushing system should be charged at 200 LPCD. But this can be reduced to 135 LPCD for the lowest economic classes and Lower Income Group (LIG) colonies depending on the prevailing conditions.

BASED ON THESE POINTS WE CAN CALCULATE TANK CAPACITY

We will calculate For a LIG (Lower Income Group) a family which will have 4 members

As we know Water Consumption in 1 Day For a Small LIG (Lower Income Group) family = 135 litres/PCD

So,

For 4 member in a Day = 135 x 4

For 4 member in a Day = 540 litre

We will design for 1000 litre (1000>540) as consumption tank capacity

And We know water density is 1000 lit/m3 which is 1m3 is equal to 1000 litre

Volume Of Water Tank= 1m³

WATER TANK SIZE CALCULATION

Water tank volume is = 1m³

Water Tank Volume Is LENGTH (L) X BREADTH (B) X DEPTH (D)

Let’s assume the depth of the water tank is 0.6 m.

Water Tank Depth Is D= 0.6 m

So Area of the tank becomes 1/0.6 which is equal to 1.67m2 (1/0.6= 1.67 m²)

Area of the water tank, L x B = 1.67 m² --- (1)

We will consider L = 2B --- (2)

Substitute equation 2 in 1

2B X B = 1.67

B² = 1.67/2 = 0.835

B² =0.835

B = √0.835

B = 0.9137 m

So water tank width is, B= 0.91m

Put the value of B in assume equation, Suppose L= 2B

L = 2X0.91

L = 1.82m

Length of water tank is, L = 1.82m

Overall water tank size is LxBxD 1.82 x 0.932 x 0.6 = 1m³

The size of the water tank will be 540 litres

Length will be equal to 1.82 m  ( L=1.82 m )

Depth is equal to 0.6 ( D=0.6m )

Breadth is equal to 0.67 m ( B=0.91m )

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