DEEPAKKU.HANSDAH211020073B.PLANNING2ND YEAR,3RD SEM
DIFFERENT TYPES OFDISTRIBUTION SYSTEM LAY OUT DEAD END SYSTEM GRID-IRON SYSTEM RING SYSTEM RADIAL SYSTEM
ADVANTAGES: Distribution network can be solved easily. Possible to easily and accurately calculate the discharge and pressures at different points. Shorter pipe lengths are needed, and the laying of pipes is easier . less no of cut off valve required. It is cheap and simple, and can be extended easily.DISADVANTAGES: Water can reach a particular point only through one way .This may cause big problem by the time of fire. If damage occurs in a main pipe or in sub- main pipe, considerable area may get affected. There are numerous dead ends in this system, which prevent the free circulation of water. This stagnation of water may lead to the degradation in its quality. By providing scour valves at each dead end, this stale water can be remove, this will result in a greater wastage of treated water.
SLUICE VALVE SCOUR VALVEThe sluice valve, alsoknown as gate These valves arevalve, that opens by used to clean thelifting a round or pipe line.rectangulargate/wedge out ofthe path of the fluid.
• This system is more suitable for well planned towns and cities• Water can reaches at different places through more than one route.• In case of repairs, very small area will be devoid of complete supply or water can be supply through other route.• Because of the different inter-connections , the dead ends are completely eliminated.• During fire ,more water can be diverted towards the affected pointsDISADVANTAGES:• This system requires more length of pipe lines and a larger no of sluice valves.• Its construction is costlier. The calculating for detailed mining accurately the sizes of the pipes and pressures at various key point
• This system is also called circular system.• The distribution area is divided into rectangular or circular blocks , and the main water pipes are laid on the periphery of these blocks .• The sub mains lines are placed in between the main lines• The ring system is very suitable for towns and cities having well planned roads
• If a city or town is having a system of radial roads emerging from different centers, the pipe lines can be best laid in a radial method by placing the distribution reservoirs at these centers.• In this system, water , is therefore, taken from the water mains, and pumped in to the distribution reservoirs placed at different centers . The water is then supplied through radially laid distribution• This method ensures high pressures and efficient water distribution.
STORAGE RESERVOIR • ABSORB THE HOURLY VARIATION IN FUNCTION DEMAND OF STORAGE • MAINTAINES CONSTANT PRESSURE RESERVOIR • SUPPLY WATER IN EMERGENCIES • LEAD TO AN OVER ALL ECONOMY • SURFACE RESERVOIRS • ELEVATED DISTRIBUTION RESERVOIRS OF RESERVOIR( DEPENDING UPON THEIRELEVATION WITH RESPECTTO THE GROUND)
SURFACE RESERVOIRS ELEVATED RESERVOIRS CONSTRUCTED AT CONSTRUCTED GROUND LEVEL OR ABOVE THE BELOW THE GROUND GROUND LEVEL LEVEL. THESE OVER HEAD GENERALLY TANKS ERECTED AT CONSTUCTED AT A CERTAIN SUITABLE HIGH POINTS IN THE ELEVATION ABOVE CITY THE GROUND LEVEL MAINLY BASED ON AND SUPPORTED ON GRAVITATIONAL TOWERS. SYSTEM. BASED ON CHEAP BUT NOT AS COMBINED GRAVITY GOOD AS ELEVATED AND PUMPING RESERVOIRS SYSTEM. CHEAP, EFFICIENT AND RLIABLE