Concept Of rainwater harvesting
Why rainwater is harvested
Rainwater harvesting today
Not new to India
Johads of Rajasthan
Rain water harvesting potential in India
Rain water harvesting system
How to harvest rain water
Components of roof top rainwater harvesting system
Filters used
Methods of roof top rain water harvesting
Advantage of rainwater harvesting
Do's and Dont's
Water: water is renewable resource. Three- fourth of surface is covered with water but only a small proportion of it accounts for freshwater fit for use.
Some facts about water
Only 2.5% of the world’s water is fresh water and most of this are in the form of polar ice-caps.
Water use as increased by 70% since 1970.
A recent report by credit issues stated that by 2025 18 will
countries experience water demand beyond supply capabilities.
Rainwater harvesting is a technology used for collecting and storing rainwater from rooftops, the land surface or rock catchments using simple techniques such as jars and pots as well as more complex techniques such as underground check dams.
Rainwater harvesting is the accumulation and deposition of rainwater for reuse on-site, rather than allowing it to run off
Due to the ever-increasing population, surface water is not enough to meet all the demands and the dependence automatically goes to ground water that drastically leading to a constant depletion of ground water level causing the wells and tube wells to dry up. To enhance the availability of groundwater at specific places and times and utilize rainwater for sustainable development.
The harvesting of rainwater simply involves the collection of water from surfaces on which rain falls, and subsequently storing this water for later use. Normally water is collected from the roofs of buildings and stored in rainwater tanks.
This slide show depicts how rainwater harvesting has been accommodated in policy and legislation in India and specifically in the state of Karnataka. It gives example of projects in rural areas and in the city of Bangalore.
Water: water is renewable resource. Three- fourth of surface is covered with water but only a small proportion of it accounts for freshwater fit for use.
Some facts about water
Only 2.5% of the world’s water is fresh water and most of this are in the form of polar ice-caps.
Water use as increased by 70% since 1970.
A recent report by credit issues stated that by 2025 18 will
countries experience water demand beyond supply capabilities.
Rainwater harvesting is a technology used for collecting and storing rainwater from rooftops, the land surface or rock catchments using simple techniques such as jars and pots as well as more complex techniques such as underground check dams.
Rainwater harvesting is the accumulation and deposition of rainwater for reuse on-site, rather than allowing it to run off
Due to the ever-increasing population, surface water is not enough to meet all the demands and the dependence automatically goes to ground water that drastically leading to a constant depletion of ground water level causing the wells and tube wells to dry up. To enhance the availability of groundwater at specific places and times and utilize rainwater for sustainable development.
The harvesting of rainwater simply involves the collection of water from surfaces on which rain falls, and subsequently storing this water for later use. Normally water is collected from the roofs of buildings and stored in rainwater tanks.
This slide show depicts how rainwater harvesting has been accommodated in policy and legislation in India and specifically in the state of Karnataka. It gives example of projects in rural areas and in the city of Bangalore.
The annual rainfall of Iran is about 13% as compared to rainfall in India. Despite of it, due to employing Rainwater Harvesting techniques and better water management , the government of Iran has been able to match up the water demands of the citizens of Iran.The presentations gives an overview of torography,technology, various rainwater harvesting structures employed in Iran.
Combining Rainwater Harvesting with Water Featuresseanmullarkey
Combining Rainwater Harvesting with Water Features
Sean Mullarkey, Applied Water Technologies
Sustainable water features that captures, stores and utilizes rain water for more than looks. Harvested rainwater can be used
for watering plants, washing cars, topping off the pool and many other uses. Combining rainwater harvesting with a
decorative water feature provides habitat, healthy water and esthetics.
Rainwater harvesting in Chandigarh_Architect Surinder Bahga_August 19, 2015India Water Portal
Best practices in rainwater harvesting from across the world and how Chandigarh can benefit from this knowledge. A presentation by Architect Surinder Bahga at an event on water conservation organised by PHD Chamber of Commerce on August 19, 2015
RAINWATER HARVESTING an investment for next generationMahin Thaliyath
this is prepared for my seminar presentation, i'm happy to share it, for the awareness of rainwater harvesting..
regards,
Mahin
mahinthaliyath@gmail.com
Water conservation by Rainwater Harvesting systems – Treatment of waste water : Physical,Chemical and
Biological methods – Root Zone treatment - Use of recycled water.
Use of Environment friendly materials, Embodied Energy of materials, Bio degradable materials. Recycling
and Reuse of steel, Aluminium and Glass.
Rain water harvesting is a technique of collection and storage of rainwater into natural reservoirs or tanks, or the infiltration of surface water into subsurface aquifers (before it is lost as surface runoff). One method of rainwater harvesting is rooftop harvesting.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)
Rainwater harvesting
1. K.I.E.T. GROUP OF INSTITUTION
GHAZIABAD
MAYANK KUMAR SINGH
4TH YEAR
A
1302900062
CIVIL ENGINEERING DEPARTMENT
2. CONCEPT OF RAINWATER HARVESTING -
It is the activity of direct collection of rain water.
Rain water can be stored for direct use or can be
recharged into the ground water aquifer.
Rainwater harvesting is the process of
augmenting the natural filtration of rainwater in
to the underground formation by some artificial
methods.
"Conscious collection and storage of rainwater to
cater to demands of water, for drinking, domestic
purpose & irrigation is termed as Rainwater
Harvesting."
3. CONTINUE………..
Rainwater harvesting is a simple, economical and
eco-friendly technique of preserving every drop
of water by guiding the rainwater that falls to
bore wells, pits and wells through small
diameter pipes. Let us all work together to
overcome the problem of water scarcity in Delhi
by harvesting this precious bounty of nature.
Join the Rain Water Harvesting Drive.
4. WHY RAINWATER IS HARVESTING -
To reduce water table depletion.
To improve the quality of ground water .
To arrest sea water intrusion in coastal areas.
To avoid flood & water stagnation in urban areas.
To arrest ground water decline and augment
ground water table.
To beneficiate water quality in aquifers.
To conserve surface water runoff during monsoon.
To reduce soil erosion.
To inculcate a culture of water conservation.
5. RAINWATER HARVESTING TODAY -
Collection (Catchment)
Flat / sloping roofs
Leaf and grit
filter, First
flush device
Transportation: Downtake
pipes
Storage in
tanks
Recharge into open wells / bore
wells / percolation pits /
trenches
6. NOT NEW TO INDIA -
Rainwater storage reservoir at Dholavira (Rann of Kutch) – Harappan civilization (2500-
1900 BC)
7. JOHADS OF RAJASTHAN
(PROVIDE WATER FOR DOMESTIC USE)
Earthen or masonry rainwater harvesting structure, for providing water for domestic use to
the communities.
11. HOW TO HARVEST RAIN WATER -
Broadly there are two ways of harvesting rainwater :-
Surface runoff harvesting
Roof top rainwater harvesting
Surface Runoff Harvesting :-
In urban area rainwater flows away as surface runoff. This runoff could be
caught and used for recharging aquifers by adopting appropriate methods.
Roof Top Rainwater Harvesting (RTRWH) :-
It is a system of catching rainwater where it falls. In rooftop harvesting, the roof
becomes the catchments, and the rainwater is collected from the roof of the
house/building. It can either be stored in a tank or diverted to artificial
recharge system. This method is less expensive and very effective and if
implemented properly helps in augmenting the ground water level of the area.
12. CONTINUE…….
1. Recharge Pit
Suitable for roof top area up to
100sq.metres
2. Abandoned/ Running Hand Pump
Suitable for roof top area up to
150sq.metres
13. CONTINUE…….
3. Abandoned Dug Well
Suitable for roof top area more than
1000sq.metres
4. Recharge Trench
Suitable for roof top area 200 to
300sq.metres
14. CONTINUE…….
5. Gravity Head Recharge Well
Suitable for roof top area more than
400sq.metres
6. Recharge Shaft
Suitable for roof top area greater than
1500 sq.metres
15. COMPONENTS OF ROOF TOP RAINWATER HARVESTING
SYSTEM -
The system mainly constitutes of following sub components :-
a) Catchment
b) Transportation
c) First flush
d) Filter Sand Gravity Filter
Charcoal Filter
PVC Pipe Filter
Sponge Filter
17. METHODS OF ROOF TOP RAIN WATER HARVESTING -
Ground water aquifers can be recharged by various kinds of
structures to ensure percolation of rainwater in the ground
instead of draining away from the surface. Commonly used
recharging methods are :-
Storage of Direct Use
Recharging Ground Water Aquifers
Recharging of bore
wells
Recharging of dug wells
Recharge
pits
Recharge Trenches
Soak ways or Recharge
Shafts
Percolation Tanks
22. DO’S AND DON’TS -
Harvested rainwater is used for direct usage or for recharging
aquifers. It is most important to ensure that the rainwater caught
is free from pollutants. Following precautionary measures
should be taken while harvesting rainwater:-
Roof or terraces uses for harvesting should be clean, free from
dust, algal plants etc.
Roof should not be painted since most paints contain toxic
substances and may peel off.
Do not store chemicals, rusting iron, manure or detergent on the
roof.
Nesting of birds on the roof should be prevented.
Terraces should not be used for toilets either by human beings or
by pets.
23. CONTINUE…….
Provide gratings at mouth of each drainpipe on terraces to trap
leaves debris and floating materials.
Provision of first rain separator should be made to flush off first
rains.
Do not use polluted water to recharge ground water.
Ground water should only be recharged by rainwater.
Before recharging, suitable arrangements of filtering should be
provided.
Filter media should be cleaned before every monsoon season.
