Download - Rainwater harvesting
RAINWATER HARVESTING
By:-
AyushClass – 9’A’Roll No - 10
WHAT IS RWH?RWH refers to collection and storage of rainwater and also other activity such as harvesting surface water extracting ground water , prevention of loss through evaporation and seepage
PURPOSES OF RWHStored for ready use in containers ground or below ground
Charged into the ground for withdrawal later
BENEFITS OF RWHRainwater harvesting prevents flooding of lowlying areas
Rain water harvesting replenishes the ground water table and enables our dug wells and bore wells to yield in a sustained manner
It helps in the availability of clean water by reducing the salinity and the presence of iron salts
RHH TECHNIQUESSTORAGE OF RAINWATER ON SURFACE FOR FUTURE USE
RECHARGE TO GROUND WATER
STORAGE OF RAINWATER ON SURFACE FOR FUTURE USE
CHECK DAMS
RAINWATER HARVESTING FROM ROOFTOP CATCHMENTS
SUBSURFACE DAMS
FARM PONDS
SUBSURFACE DAMS
CHECK DAMS
RAINWATER RAINWATER HARVESTING FROM HARVESTING FROM ROOFTOP CATCHMENTSROOFTOP CATCHMENTS
ADVANTAGES OF RWHPROVIDES SELF- SUFFICIENCY TO YOUR WATER SUPPLY
REDUCE THE COST FOR PUMPING GROUND WATER
REDUCE SELF EROSION IN URBAN AREAS
RAINWATER HARVESTING SYSTEMS ARE SIMPLE WHICH CAN BE ADOPTED BY INDIVIDUALS
PROVIDE HIGH QUALITY WATER THROUGH DILUTION WHEN RECHARGE TO GROUND WATER
IT CAN IMPROVE THE ENGINEERING BUILDING FOUNATION WHEN CISTERNS ARE BUILD AS PART OF THE SUBSTRUCTURE OF THE BUILDINGS, AS IN THE CASE OF MANDATORY CISTERNS
DISADVANTAGES OF RWHTAKE CONSIDERABLE AMOUNT OF TIME TO PAY FOR ITSELF
LEKAGE FROM CISTERNS CAN CAUSE THE DETERIORATION OF LOAD BEARNG SLOPES
THE SUCCESS OF RAINFALL HARVESTING DEPENDS UPON THE FREQUENCY AND AMOUNT OF RAINFALL THEREFORE IT IS NOT A DEPENDABLE WATER SOURCES IN TIMES OF DRY WEATHER OR PRONGED DRAUGHT
THANK YOU