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