Water Distribution Systems

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The purpose of distribution system is to deliver water to consumer with appropriate quality, quantity and pressure. Distribution system is used to describe collectively the facilities used to supply water from its source to the point of usage.

Requirements of Good Distribution System

  1. Water quality should not get deteriorated in the distribution pipes.
  2. It should be capable of supplying water at all the intended places with sufficient pressure head.
  3. It should be capable of supplying the requisite amount of water during fire fighting.
  4. The layout should be such that no consumer would be without water supply, during the repair of any section of the system.
  5. All the distribution pipes should be preferably laid one metre away or above the sewer lines.
  6. It should be fairly water-tight as to keep losses due to leakage to the minimum.

Layouts of Distribution Network

The distribution pipes are generally laid below the road pavements, and as such their layouts generally follow the layouts of roads. There are, in general, four different types of pipe networks; any one of which either singly or in combinations, can be used for a particular place. They are:

1)Distribution Reservoirs

Distribution reservoirs, also called service reservoirs, are the storage reservoirs, which store the treated water for supplying water during emergencies (such as during fires, repairs, etc.) and also to help in absorbing the hourly fluctuations in the normal water demand.

Functions of Distribution Reservoirs:

  1. to absorb the hourly variations in demand.
  2. to maintain constant pressure in the distribution mains water stored can be supplied during emergencies.

Location and Height of Distribution Reservoirs:

  1. should be located as close as possible to the center of demand.
  2. water level in the reservoir must be at a sufficient elevation to permit gravity flow at an adequate pressure.
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