rainwater harvesting (civil engineering seminar)
DESCRIPTION
Rainwater harvesting slide for civil engineering seminarTRANSCRIPT
welcome A SEMINAR PRESENTATION
RAINWATER HARVESTINGON
IMLIMEREN LONGCHAR
SUBMITTED BY
RAIN WATER HARVESTING
WHAT IS HARVESTING?
Harvesting is defined as storing in such a way that it can be used throughout the year.
WHAT IS RAIN WATER HARVESTING?
Rainwater harvesting is the accumulating and storing of rainwater by artificial methods for further utilization.
The principle of collecting and using precipitation from a catchments surface.
Mostly done by rooftop harvesting and is used for domestic and agricultural purposes.
WHY IS THIS REQUIRED?Surface water is inadequate to meet our demand and we
have to depend on ground water.Environmental Changes.To arrest ground water decline and augment ground water
tableTo beneficiate water quality in aquifersTo conserve surface water runoff during monsoonTo reduce soil erosionDue to rapid urbanization, infiltration of rain water into the
sub-soil has decreased drastically and recharging of ground water has diminished etc.
Bangalore gets most of its drinking water from a distance of 95 kms. and a depth of 500 mts.
RAIN WATER HARVESTING TECHNIQUES :
Roof top rainwater harvesting.
Surface runoff harvesting .
COMPONENTS OF ROOFTOP RWHCATCHMENT
COUNDUITS
FILTERS
STORAGE FACILITY
A first rain separator and a sand filter (First Flush)
EVERY ROOF IN A CITY CAN BE A CATCHMENT
SURFACE RUNOFF HARVESTINGHarvesting of surface runoff
and storage of the same into reservoirs such as water pans makes it available for use when required.
In this method of collecting rainwater for irrigation, water flowing along the ground during the rains will be collected to a tank below the surface of the ground..
USES OF RAINWATER HARVESTING
Domestic Use
Agricultural Use
Industrial and Commercial use
Increase groundwater supplies
Advantages:It provides self-sufficiency to water supply.Rainwater harvesting is less expensive, easy to
construct and easy to maintain. Rainwater Harvesting slows down water flow,
contains potential floodwater and reduces spread of pollution.
The water is convenient and accessible; valuable time and effort are saved in collecting and/or hauling water.
It provides a supply of water to meet our future needs.
Disadvantages:Initial cost may be high.Regular Maintenance .Vulnerable water quality.Storage capacity limits.
CONCLUSIONOn of the best way to solve the world burning
facing issue: Water Scarcity.Most useful for large scale applications.Saving of energy per lifting of well and saving of
Water bills.Harvested water can be used for Daily household
needs.The more the business and industries involved =
greater environmental and economic benefits.Rainwater Harvesting saves water, money and
the environment.
Rainwater Harvesting A NOBLE GOAL
A COMMON RESPONSIBILITY
.