Rainwater harvesting and artificial groundwater recharge techniques are presented. Rainwater harvesting involves collecting and storing rainwater through various surface techniques like check dams, rooftop catchments, and farm ponds. Artificial groundwater recharge techniques like bore pits, wells, and spreading basins are used to replenish groundwater levels. The benefits of rainwater harvesting include preventing flooding, replenishing groundwater, and providing clean water. While rainwater harvesting provides a sustainable water source, it depends on rainfall amounts and has high initial costs. Overall, widespread adoption of rainwater harvesting and groundwater recharge techniques can help supplement water supplies.

1. RAINWATERRAINWATER
HARVESTINGHARVESTING
ANDAND
ARTIFICIALARTIFICIAL
RECHARGE TORECHARGE TO
GROUND WATERGROUND WATER
PRESENTED BY
CHINTHU P WILSON
S7,CIVIL ENGG
Roll Number:20
GUIDED BY
LECT. MANJU.P.M
DEPARTMENT OF CIVIL ENGINEERING

2. WHAT IS RWH?WHAT IS RWH?
RWH refers to collection andRWH refers to collection and
storage of rainwater and also otherstorage of rainwater and also other
activity such as harvesting surfaceactivity such as harvesting surface
water extracting ground water ,water extracting ground water ,
prevention of loss throughprevention of loss through
evaporation and seepageevaporation and seepage

3. PURPOSES OFPURPOSES OF
RWHRWH
Stored for ready use in containersStored for ready use in containers
ground or below groundground or below ground
Charged into the ground for withdrawalCharged into the ground for withdrawal
laterlater

4. BENEFITS OF RWHBENEFITS OF RWH
Rainwater harvesting prevents flooding ofRainwater harvesting prevents flooding of
lowlying areaslowlying areas
Rain water harvesting replenishes the groundRain water harvesting replenishes the ground
water table and enables our dug wells and borewater table and enables our dug wells and bore
wells to yield in a sustained mannerwells to yield in a sustained manner
It helps in the availability of clean water byIt helps in the availability of clean water by
reducing the salinity and the presence of ironreducing the salinity and the presence of iron
saltssalts

5. RHHRHH
TECHNIQUESTECHNIQUES
STORAGE OF RAINWATER ON SURFACESTORAGE OF RAINWATER ON SURFACE
FOR FUTURE USEFOR FUTURE USE
RECHARGE TO GROUND WATERRECHARGE TO GROUND WATER

6. STORAGE OF RAINWATERSTORAGE OF RAINWATER
ON SURFACE FOR FUTUREON SURFACE FOR FUTURE
USEUSE
CHECK DAMSCHECK DAMS
RAINWATER HARVESTING FROM ROOFTOPRAINWATER HARVESTING FROM ROOFTOP
CATCHMENTSCATCHMENTS
SUBSURFACE DAMSSUBSURFACE DAMS
FARM PONDSFARM PONDS

7. SUBSURFACE DAMSSUBSURFACE DAMS

8. CHECK DAMSCHECK DAMS

9. RAINWATERRAINWATER
HARVESTING FROMHARVESTING FROM
ROOFTOP CATCHMENTSROOFTOP CATCHMENTS

10. FARM PONDSFARM PONDS

11. RECHARGE TO GROUNDRECHARGE TO GROUND
WATERWATER
RECHARGE BORE PITRECHARGE BORE PIT
RECHARGE WELLRECHARGE WELL
RECHARGE WELL CUM BORE PITRECHARGE WELL CUM BORE PIT
SPREADING BASINSSPREADING BASINS
DITCHESDITCHES
HAND PUMPSHAND PUMPS

12. RECHARGE BORE PITRECHARGE BORE PIT

13. RECHARGE WELLRECHARGE WELL

14. RECHARGE WELL CUM BORERECHARGE WELL CUM BORE
PITPIT

15. DITCHESDITCHES

16. HAND PUMPSHAND PUMPS

17. SPREADING BASINSSPREADING BASINS

18. ADVANTAGES OF RWHADVANTAGES OF RWH
PROVIDES SELF- SUFFICIENCY TO YOUR WATER SUPPLYPROVIDES SELF- SUFFICIENCY TO YOUR WATER SUPPLY
REDUCE THE COST FOR PUMPING GROUND WATERREDUCE THE COST FOR PUMPING GROUND WATER
REDUCE SELF EROSION IN URBAN AREASREDUCE SELF EROSION IN URBAN AREAS
RAINWATER HARVESTING SYSTEMS ARE SIMPLE WHICH CAN BERAINWATER HARVESTING SYSTEMS ARE SIMPLE WHICH CAN BE
ADOPTED BY INDIVIDUALSADOPTED BY INDIVIDUALS
PROVIDE HIGH QUALITY WATER THROUGH DILUTION WHENPROVIDE HIGH QUALITY WATER THROUGH DILUTION WHEN
RECHARGE TO GROUND WATERRECHARGE TO GROUND WATER
IT CAN IMPROVE THE ENGINEERING BUILDING FOUNATION WHENIT CAN IMPROVE THE ENGINEERING BUILDING FOUNATION WHEN
CISTERNS ARE BUILD ASCISTERNS ARE BUILD AS
PART OF THE SUBSTRUCTURE OF THE BUILDINGS, AS IN THE CASEPART OF THE SUBSTRUCTURE OF THE BUILDINGS, AS IN THE CASE
OF MANDATORY CISTERNS

19. DISADVANTAGES OF RWHDISADVANTAGES OF RWH
TAKE CONSIDERABLE AMOUNT OF TIME TO PAY FOR ITSELFTAKE CONSIDERABLE AMOUNT OF TIME TO PAY FOR ITSELF
LEKAGE FROM CISTERNS CAN CAUSE THE DETERIORATION OFLEKAGE FROM CISTERNS CAN CAUSE THE DETERIORATION OF
LOAD BEARNG SLOPESLOAD BEARNG SLOPES
THE SUCCESS OF RAINFALL HARVESTING DEPENDS UPON THETHE SUCCESS OF RAINFALL HARVESTING DEPENDS UPON THE
FREQUENCY AND AMOUNT OF RAINFALL THEREFORE IT IS NOT AFREQUENCY AND AMOUNT OF RAINFALL THEREFORE IT IS NOT A
DEPENDABLE WATER SOURCES IN TIMES OF DRY WEATHER ORDEPENDABLE WATER SOURCES IN TIMES OF DRY WEATHER OR
PRONGED DRAUGHTPRONGED DRAUGHT

20. CONCLUSIONCONCLUSION
• IN DENSELY POPULATED COUNTRIES LIKE INDIA, THE DEMAND FOR WATER GOES ONIN DENSELY POPULATED COUNTRIES LIKE INDIA, THE DEMAND FOR WATER GOES ON
INCREASING WITH INCREASE IN POPULATION. THIS PROVES TO BE MAJOUR PROBLEMINCREASING WITH INCREASE IN POPULATION. THIS PROVES TO BE MAJOUR PROBLEM
IN OUR EXPLORING NEW SOURCE OF WATER , RAINWATER NATURALLY AND FREELYIN OUR EXPLORING NEW SOURCE OF WATER , RAINWATER NATURALLY AND FREELY
AVAILABLE SOURCE CAN BE PROPERLY UTILIZED BY MEANS OF WATER HARVESTINGAVAILABLE SOURCE CAN BE PROPERLY UTILIZED BY MEANS OF WATER HARVESTING
AND RECHARGINGAND RECHARGING
• RAINWATER HARVESTING IS A VIABLE TECHNOLOGY FOR ENCHANCING PRODUCTIONRAINWATER HARVESTING IS A VIABLE TECHNOLOGY FOR ENCHANCING PRODUCTION
FROM THE RAINFED LANDSFROM THE RAINFED LANDS
• GROUNDWATER RECHARGING BY ARTIFICIAL METHODS SHOULD BE TAKEN UPGROUNDWATER RECHARGING BY ARTIFICIAL METHODS SHOULD BE TAKEN UP
PRIORITY BASIS, FIRST IN DISTRICT WHERE RAINFALL IS LESS AND RARE FARMERSPRIORITY BASIS, FIRST IN DISTRICT WHERE RAINFALL IS LESS AND RARE FARMERS
HAVE TO DEPEND ON RAINWATERHAVE TO DEPEND ON RAINWATER
• A STRATEGY TO IMPLEMENT THE GROUND WATER RECHARGE. IN A MAJOUR WAYA STRATEGY TO IMPLEMENT THE GROUND WATER RECHARGE. IN A MAJOUR WAY
NEEDS TO LAUNCHED WITH CONCERTED EFFORTS BY VARIOUS GOVERNMENTAL ANDNEEDS TO LAUNCHED WITH CONCERTED EFFORTS BY VARIOUS GOVERNMENTAL AND
NONGOVERNMENTAL AGENCIES AND THE PUBLIC AT LARGE, TO INCREASE THENONGOVERNMENTAL AGENCIES AND THE PUBLIC AT LARGE, TO INCREASE THE
WATER TABLE AND MAKE THE GROUND WATER RESOURCES, A RELIABLE ANDWATER TABLE AND MAKE THE GROUND WATER RESOURCES, A RELIABLE AND
SUSTAINABLE SOURCE FOR SUPPLEMENTING WATER SUPPLY NEEDS.SUSTAINABLE SOURCE FOR SUPPLEMENTING WATER SUPPLY NEEDS.

21. REFERENCESREFERENCES
• Chu,S.C and Liaw,C.H 1995-1997 study of industrial rainwater catchment systems(I)-(III). FinalChu,S.C and Liaw,C.H 1995-1997 study of industrial rainwater catchment systems(I)-(III). Final
Report of Indus. Tech.Res.InstReport of Indus. Tech.Res.Inst
• Liaw,S.C and Tsai,Y.L.2002. Application of rainwater retardation and retention for a healthy waterLiaw,S.C and Tsai,Y.L.2002. Application of rainwater retardation and retention for a healthy water
envirnoment in urban areas.Journal of water resources managementenvirnoment in urban areas.Journal of water resources management
• Liaw,C.H., Chen,H.K, Chang, K.c. and Tsai, Y.l. 2000. Feasibility analysis of rainwater catchmentLiaw,C.H., Chen,H.K, Chang, K.c. and Tsai, Y.l. 2000. Feasibility analysis of rainwater catchment
systems in taiwan,proc. East Asia 2000 Rainwater utilization symposium:131-144,systems in taiwan,proc. East Asia 2000 Rainwater utilization symposium:131-144,
oct.1,2000,Taipei,Taiwanoct.1,2000,Taipei,Taiwan

22. THANK YOUTHANK YOU