Rainwater harvesting involves collecting and storing rainwater from rooftops in tanks or recharging it into groundwater aquifers. It helps conserve and augment groundwater storage, improve groundwater quality, and reduce water shortages. Various techniques are used for storage in containers above or below ground or for groundwater recharging through structures like pits, trenches, dug wells, and recharge wells. Rainwater harvesting has advantages like providing local water self-sufficiency, reducing pumping costs, and improving groundwater quality through dilution and recharge. Given falling water tables and the replacement of permeable land with impermeable surfaces, rainwater harvesting is presented as a reliable solution to water shortages.
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
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
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
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.
Concept and approach of springshed development and management 22 jan 2020India Water Portal
Over the last decade, demand for spring management has increased as traditional spring sources have started drying up or becoming contaminated. In response, communities, NGOs and state agencies began dedicated spring protection programmes. In the Himalayas, the State of Sikkim and organizations such as Central Himalayan Action and Research Group (CHIRAG) and People Science Institute (PSI) started identifying and protecting spring recharge areas around 2007. The difference between these programmes and many other previous efforts is that they went beyond supply-side improvements to focus on the use of hydrogeology to map springsheds for targeted interventions.
The Advanced Centre for Water Resources Development and Management (ACWADAM), a research and capacity-building organization comprised of hydrogeologists and other experts began lending their expertise and building capacity of stakeholders. ACWADAM provides technical support, training and materials in hydrogeology to all network partners as well as others in India and the region. Similar programmes began independently in most of the mountain regions of India. Arghyam, a funding organization that was supporting many of these programmes, noticed that these disparate initiatives shared commonalities despite geographic diversity. They thus organized and funded a meeting of these various organizations in June 2014, and the Springs Initiative was born.
The springs initiative aims to tackle the current water crisis and to ensure safe and sustainable access to water for all, by promoting responsible and appropriate management of aquifers, springsheds, and watersheds and conserving ecosystems in partnership with communities, governments and other stakeholders.
This presentation has been developed as a part of the springs initiative to promote an understanding of springs and their role in mountainous areas.
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
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.
Concept and approach of springshed development and management 22 jan 2020India Water Portal
Over the last decade, demand for spring management has increased as traditional spring sources have started drying up or becoming contaminated. In response, communities, NGOs and state agencies began dedicated spring protection programmes. In the Himalayas, the State of Sikkim and organizations such as Central Himalayan Action and Research Group (CHIRAG) and People Science Institute (PSI) started identifying and protecting spring recharge areas around 2007. The difference between these programmes and many other previous efforts is that they went beyond supply-side improvements to focus on the use of hydrogeology to map springsheds for targeted interventions.
The Advanced Centre for Water Resources Development and Management (ACWADAM), a research and capacity-building organization comprised of hydrogeologists and other experts began lending their expertise and building capacity of stakeholders. ACWADAM provides technical support, training and materials in hydrogeology to all network partners as well as others in India and the region. Similar programmes began independently in most of the mountain regions of India. Arghyam, a funding organization that was supporting many of these programmes, noticed that these disparate initiatives shared commonalities despite geographic diversity. They thus organized and funded a meeting of these various organizations in June 2014, and the Springs Initiative was born.
The springs initiative aims to tackle the current water crisis and to ensure safe and sustainable access to water for all, by promoting responsible and appropriate management of aquifers, springsheds, and watersheds and conserving ecosystems in partnership with communities, governments and other stakeholders.
This presentation has been developed as a part of the springs initiative to promote an understanding of springs and their role in mountainous areas.
Water is essential for all life of forms on earth-including human, animal and vegetation.
It is therefore important that adequate supplies of water be developed to sustain such life
Where there is no surface water, where groundwater is deep or inaccessible due to hard ground conditions, or where it is too salty, acidic or otherwise unpleasant or unfit to drink, another source must be sought.
In areas that have regular rainfall, the most appropriate alternative is the collection of rainwater, called rainwater harvesting .
It describes necessity of rain water harvesting, what is the solution, methods and techniques of rain water harvesting.
Additional it also includes Packaged water treatment, its necessity and working.
Techniques of rain water harvesting in urban and rural areasIEI GSC
Rainwater harvesting (RWH)is the process of arresting and storing rain water for efficient application and conservation. This is an effective way of utilising large quantum of water which otherwise goes as surface runoff. RWH has 2 components: 1)Rain water collection for storage
2)Recharging groundwater The talk cum presentation shall demonstrate several ways & methods to harvest rainwater in urban as well as rural areas
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
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Palestine last event orientationfvgnh .pptxRaedMohamed3
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Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
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What is the purpose of the Sabbath Law in the Torah. It is interesting to compare how the context of the law shifts from Exodus to Deuteronomy. Who gets to rest, and why?
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Ethnobotany and Ethnopharmacology:
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Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
2. What is rain water 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
3. Rain Water Harvesting
Rain Water Harvesting (RWH)- process of collecting,
conveying & storing water from rainfall in an area – for
beneficial use.
Storage – in tanks, reservoirs, underground storage-
groundwater
Hydrological Cycle
4. Why Rain water be harvested
• To conserve & augment the storage of ground
water
• 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
Rain water harvesting techniques are used to
over come the shortage of water.
5. Reasons of Shortage of Water
• Population increase
• Industrialization
• Urbanization
(a) Increase in per capita utilization
(b) Less peculation area
• In places where rain fed/ irrigation based crops are
cultivated through ground water
• Decrease in surface area of Lakes, talab, tanks etc.
7. What is the solution
• Rain water is the ultimate source of fresh water
• Potential of rain to meet water demand is
tremendous
• Rain water harvesting helps to overcome water
scarcity
• To conserve ground water the aquifers must be
recharged with rain water
• Rain water harvesting is the ultimate answer
8. Harvesting System
Broadly rainwater can be harvested for two purposes
Storing rainwater for ready use in containers above or below
ground
Charged into the soil for withdrawal later (groundwater
recharging)
9. use in containers above or below
ground
•Charged into the soil for
withdrawal later (groundwater
recharging)
RAIN WATER HARVESTING TECHNIQUES
There are two main techniques of rain water
harvestings.
• Storage of rainwater on surface for future use.
• Recharge to ground water.
The storage of rain water on surface is a traditional
techniques and structures used were underground
tanks, ponds, check dams, weirs etc
10.
11.
12. Recharge to ground water is a new concept of rain
water harvesting and the structures generally
used are :-
Pits :- Recharge pits are constructed for recharging
the shallow aquifer. These are constructed 1 to 2
m, wide and to 3 m. deep which are back filled
with boulders, gravels, coarse sand.
13. • Trenches:- These are constructed when the
permeable stram is available at shallow depth.
Trench may be 0.5 to 1 m. wide, 1 to 1.5m. deep
and 10 to 20 m. long depending up availability of
water. These are back filled with filter materials.
• Dug wells:- Existing dug wells may be utilised as
recharge structure and water should pass through
filter media before putting into dug well.
14. Hand pumps :- The existing hand pumps may be
used for recharging the shallow/deep aquifers, if
the availability of water is limited. Water
should pass through filter media before
diverting it into hand pumps.
Recharge wells :- Recharge wells of 100 to 300
mm. diameter are generally constructed for
recharging the deeper aquifers and water is
passed through filter media to avoid choking of
recharge wells.
15. Recharge Shafts :- For recharging the shallow
aquifer which are located below clayey surface,
recharge shafts of 0.5 to 3 m. diameter and 10 to 15
m. deep are constructed and back filled with
boulders, gravels & coarse sand.
Lateral shafts with bore wells :- For recharging the
upper as well as deeper aquifers lateral shafts of 1.5
to 2 m. wide & 10 to 30 m. long depending upon
availability of water with one or two bore wells are
constructed. The lateral shafts is back filled with
boulders, gravels & coarse sand.
16. Spreading techniques :- When permeable strata
starts from top then this technique is used.
Spread the water in streams/Nalas by
making check dams, nala bunds, cement plugs,
gabion structures or a percolation pond may be
constructed.
18. Rain Water Harvesting– Advantages
1.Provides self-sufficiency to water supply
2.Reduces the cost for pumping of ground water
3.Provides high quality water, soft and low in minerals
4.Improves the quality of ground water through dilution when recharged
5.Reduces soil erosion & flooding in urban areas
6.The rooftop rain water harvesting is less expensive & easy to construct,
operate and maintain
7. In desert, RWH only relief
8. In saline or coastal areas & Islands, rain water provides good quality water
20. conclusion
Rain water harvesting can be a cost-effective alternative
to other water-accruing methods. It is neither energy-
intensive nor labour-intensive. With the water table falling
rapidly, & concrete surfaces and landfill dumps taking the
place of water bodies, RWH is the most reliable solution
for augmenting groundwater level to attain self-
sufficiency.
