Water Demand

Water Demand

water demand

Whenever an engineer is given the duty to style a water system scheme for a specific section of the community it becomes imperative upon him/her, to first consider the demand, then the second requirement is to seek out sources to satisfy that demand.

It is very difficult to exactly assess the number of water demanded by the general public , since there are many variable factors affecting water consumption.

The various sort of water demands, which a city may have, could also be weakened into the subsequent classes:-

(1) Domestic water demand(2) Industrial water demand(3) Institution and commercial water demand(4) Demand for Public use(5) Fire demand(6) Water required to compensate losses in wastes and theft.

 so as to estimate, as correctly as possible, the entire water demand, of these demands must be considered and suitable provision made, depending upon the requirements of these people for whom the water system scheme is to be designed.

Domestic Water Demand

This includes the water required in residential buildings for drinking, cooking, bathing lawn sprinkling gardening sanitary purpose etc. the quantity of domestic water consumption per person shall vary consistent with the living conditions of the consumers.
As per IS:1172-1993, the minimum domestic consumption for a town or a city with full flushing system should be taken at 200 l/h/d ; although it are often reduced to 135 l/h/d for economically weaker sections.

water supply demand 

Industrial Water Demand 

The industrial water demand is represent the water demand of the  industries,, which is either the  existing or are likely to be started in future, within the city that water system is being planned. This quantity will thus vary with the amount and sort of industries present within the city. the standard per capita consumption on account of commercial needs of a city is usually taken as 50 liters/person/day.

Institutional and Commercial Water Demand 

The water requirements of institutions like hospitals hotels schools, colleges, railway stations, offices etc. should even be assessed. the amount will definitely vary with the character of the town and with the number of economic establishments. On a mean a per capita demand of 20 l/h/d is typically considered.

Demand for Public Use

This includes the number of water required for utility purposes like watering of public parks, washing and sprinkling on roads, use publicly fountains etc. for many of the water system schemes in India, these needs aren't believed as essentials, and a figure of 10 l/h/d is typically added on this account.

Fire Demand 

In thickly populated and industrial areas, fires generally escape and results in serious damages, if not controlled effectively. Therefore, a provision should be made in water system scheme for fighting fires. 

Water Required to the  Compensate Losses in Thefts and  the Wastes 

water demand

This includes the water lost in leakage thanks to bad plumbing or damaged meters, stolen water thanks to unauthorized water connections and other losses and wastes. These losses should be taken under consideration while estimating the entire requirements.