presentation of water harvesting

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What is Rainwater Harvesting Technique? – PowerPoint Presentation

• by Refresh Science
• May 10, 2020 January 6, 2022

Rainwater Harvesting is a technique used to collect rainwater from roofs & above surfaces of the buildings and store it for later use. Rainwater harvesting is collecting, storing, filtering & purifying of rainwater for future. It has been adapted in various parts of the world where conventional water supply systems fail to meet people’s needs. It is the best way to collect rainwater that flows off waste.  

Water is natural resource which is necessary for all the living beings to survive in the word. Even though our planet is surrounded by 3/4 parts of water, only 1% of it can be utilised for human use. Water is necessary not only for drinking but also for day to day usage, agriculture, industrial & commercial purposes. Due to the globalisation, contamination and other reasons, water scarcity is developed all over the world. Water is important for the existence of all the organisms in the world. So, it is necessary to conserve water for our self and the future to come.  

Water ratio is balanced by rainfall & evaporation by the nature. Rainwater harvesting is an effective method implemented to prevent water scarcity.

What are the benefits of rainwater harvesting ?

The best part of rainwater harvesting is that it saves time and money. It is a sustainable water management practice that can be implemented by anyone in different levels.

• It can be implemented in less cost.
• It reduce the water bill
• Prevents soil erosion
• Prevents quality & quantity of ground water
• It is easy to implement and operate
• Can get pure water that is free from chemicals

Download Rainwater Harvesting as PowerPoint Presentation:

Components of rainwater harvesting, 1. catchment area.

The collection area, i.e., the roof of the building is the first component to collect water.

2. Conveyance system

The gutter is referred as the conveyance system. That is the pathway of the water to flow from roof to the storage area.  

3. First flush & filter

It is used to flush out the first spell of rain to clear the dust particles in the roof and to remove the pollutants . If proper filter installation is not maintained, there is chances of ground water being contaminated. After first flush of rainfall, the water should pass through filters. Filters are used to treat water effectively without contamination and store the water clean. It filters dust, leaves and other organic matters. There are different types of filter. They are sand gravel filter, charcoal filter, PVC pipe filter, sponge filter. The basic function of the filter is to purify water and send pure water to storage system. The type of filter to be implemented depends on testing the density of the soil, cost, nature of surface and intensity of rainfall.  

4. Storage system

  It depends and varies according the building structure, size and material of construction. It can be stored in underground tanks or above tanks. The tanks should always be placed on a stable and level area to prevent it from leaking or collapsing. It can also be allowed to recharge the bore wells or dig wells as a recharge system to increase the quality & quantity of water.  

5. Delivery system

  It is the pump that required to distribute the water inside or outside the building.  

Types of Rainwater Harvesting

There are two types rainwater harvesting:

1. Surface Runoff harvesting

In urban areas water flows away unwantedly into the sea or as surface runoff. This runoff water can be collected and used for recharging system by adopting harvesting methods.

2. Rooftop Rainwater harvesting

The rainwater is collected from the buildings roof and stored to the tank or the recharge system. It is less expensive and is useful to increase the ground water level if implemented in correct manner.

There are various methods of rooftop rainwater harvesting. They are described below.

Storing for Direct use

This is the most cost effective way of rainwater harvesting. In this rainwater collected from the rooftop is stored directly in the tank. The tank is designed accordingly with first flush and filtration system before the storage tank. It is also designed with a overflow control system, so that the excess water can be diverted to the recharge system. This method is most commonly implemented in houses and buildings. The stored water can be used for secondary purposes as house hold usages. It not only saves rainwater, but also the cost of transporting and distributing water to doorstep. It is useful to conserve ground water and collect rainwater effectively.

Recharging groundwater aquifers

Groundwater can be recharged by draining the rainwater into the borewells, dugwells, pits, trenches or percolation tanks.

Recharging of Borewells

The collected water from the rooftop is send directly to the filtration system. After filtration the water is diverted to borewells to get recharged. Abandoned borewells are also used as recharging aquifers. The first flow of rain should be flushed out to avoid contamination and to restrict clogs.

Recharging of Dugwells

Dug wells can also be used as recharging system. The collected water from the catchment pipes are directly send to the dug wells after filtration process. The filtration can be suggested as done in the bore well recharging system. The dug wells should be maintained by cleaning and desalting in regular intervals to maintain the recharged water quality.

Recharge pits

Recharge pits are smalls pits that are constructed using bricks or masonry walls. The pits can be made of any shape circle, rectangle or square. It is mostly implemented in small houses or buildings. The top of pit can be covered and the bottom is filled with filter medium. The capacity of the pit is designed depending on the catchment area, density of the soil and the usual intensity of rainfall in the area.

Recharge Trenches

The recharge trenches are made where the upper layer of the soil does not allow fluids to pass into. The recharge trenches are dig in the ground and is refilled with stones, small rocks or bricks. It is usually implemented in the surface runoff areas to enhance percolation. It is suitable in parks, playgrounds and roadside drains.

Percolation Tanks

Percolation tanks are artificial tanks that are constructed on land that is highly permeable. It is constructed by earthen materials that allows the water to pass through it. The water then collected is percolated in the ground. It allows to enhance the groundwater quality. Both surface runoff and roof top water can be diverted into percolation tanks. It can be implemented in gardens, open spaces and roadside of urban areas. The collected water can be used for gardening purposes, and other raw uses.

  As a result of harvesting rainwater, the need amount of water is obtained through many operations for industrial wide and house needs without depending on other water sources. It also reduces the soil erosion and floods. It reduces the water bills and also can be implemented in less cost. Chemical free water is obtained for irrigation and watering gardens. Can be used for several non- drinking purposes. With increase in population the water needs are continuously increasing and rainwater harvesting decreases the demand of ground water in the areas of water scarcity.  

Every Drop Counts… 

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Rain Water Harvesting PPT: Uses, Limitations and Advantages

Rain Water Harvesting PPT: Uses, Limitations and Advantages Free Download: Rain Water Harvesting is a process of collecting rain water and conserving it for future utilization. It involves processes of collecting, storing, conveying and purification of rainwater that falls off from the rooftops, open grounds, roads, parks, etc.

The main components of rain water harvesting are catchment that is used to collect and store the captured rainwater, flush used for flushing out the first spell of rain that is generally dirty, filter used for purification of the rain water, conveyance system used to transport the water for multi-utilization and tanks used for storage. Keeping in mind the upcoming crisis of water, rain water harvesting is an excellent way to conserve water and make the utmost use of it.

Table of Content

• Introduction
• Uses of Rain Water Harvesting
• Advantages of Rain Water Harvesting
• Limitations of Rain Water Harvesting
• Rain water System components and design considerations.
• Feasibility of Rain Water Harvesting
• Quality of Rain Water

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Presentations

The presentations are typically done with illustrative photos and graphics, though Brad is also a practiced live storyteller sans slides. You can pick from the following or a custom presentation can be developed for the unique potential and needs of your event.

Fees for presentations Virtual presentation: already prepared $500; custom $1,000 In-Arizona presentation and/or workshop: $1,000-$2,000 / plus travel, and ability for me to sell my books at event Out-of-state presentation and/or workshop: $3,000 / plus travel and lodging, and ability to sell my books at event

Please note that the sharing of the fees above begins the conversation with Brad. If you cannot swing the fee, feel free to offer a different amount. Many things are considered when looking at an event, such as its potential impact, research Brad could carry out at the event or in the event’s locale, etc.

Integrated Local Harvests: Simple and Effective Ways to Enhance the Natural Abundance of Your Home, Community, and the Larger World

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You’ll see many examples of such transformation, including how once-dying wetlands and creek flows are being regenerated with simple hand-built structures made of on-site materials; how ancient sun- and shade-harvesting sites are informing passively heated, cooled, and powered modern homes and retrofits; and how once-blighted, overheated neighborhood streets are being rejuvenated into thriving greenbelts of water, people, wildlife, art, food, and celebration by planting once-drained stormwater, seed, and yard prunings.

This talk is both an invitation for you to engage and partner with your natural surroundings and community, and a treasure map showing you the way—by planting the rain, dancing with the sun, growing fertile shade, and more—to live as one of your community’s inspirational sparks! (Duration: 1.5 hours plus Q&A)

Re-hydrating and Re-enlivening Our Communities with Rain-watered Neighborhood Food Forestry This presentation is about neighborhood forestry efforts empowering citizens, and contractors, to effectively plant the rain and native food-bearing vegetation to grow vibrant and resilient abundance where they live, work, and play. Then train them up and support them with the education, guidance, collaborations, and policy that enable them to better steward the plantings for decades to come. Dramatic results include cooler neighborhoods, healthier eating, a revitalization of indigenous cuisine, deeper connections with people and place, reduced flooding, skill building, greater soil fertility, and more beauty and joy. The strategies and practices are accessible to all and most are free or cost no more than the price of a shovel.

General Water-Harvesting Presentation: Turning Drains Into Sponges and Water Scarcity Into Water Abundance

This inspiring presentation shares eight universal principles of water harvesting along with simple strategies that turn water scarcity into water abundance, and floods into opportunity. They empower you to create integrated water-sustainable landscape plans at home and throughout your community. Rainwater harvesting is the process of capturing rain and making the most of it as close as possible to where it falls. Greywater harvesting is the process of directing water from household sink, bathtub, shower, and washing-machine drains into the soils of the landscape where the water is naturally filtered and reused to generate more on-site resources. The two work hand in hand, and can reduce our water consumption by 30 to 50%! You’ll see examples enhancing local food security, passively cooling cities in summer, reducing costs of living and energy consumption, controlling erosion, averting flooding, reviving dead waterways, minimizing water pollution, building community, creating celebration, and more. (Duration: 1 hour plus Q&A)

Water-Harvesting Earthworks Presentation: Planting the Rain: Principles, Practices, and Tips for Water-Harvesting Earthworks and Raingardens

Plant the rain before you plant your trees to boost production, reduce flooding, conserve water, and create sustainable oases around your homes and community infrastructure. Raingardens and other small-scale earthworks quickly infiltrate rainfall into the soil where less is lost to evaporation, while reducing erosion. Living ‘pumps’ of vegetation then enable us the access that water. Come learn simple principles and tips to leverage greater success as you implement these simple and effective passive systems. This presentation builds on Brad’s basic water-harvesting talk, while offering more specifics and case studies. Working examples and case studies will be highlighted. (Duration: 1 hour plus Q&A)

Greywater-Harvesting Presentation:

Learn how to create simple, low-maintenance, legal, and effective household greywater-harvesting systems that use gravity to direct greywater directly into the landscape (no stinky tanks) where it passively irrigates multi-use landscape plantings. This can greatly lower water and power consumption, and related utility bills, while enhancing and beautifying your yard. We will discuss the creation of greywater systems, greywater-harvesting guidelines, materials and suppliers, greywater-appropriate soaps and detergents, marrying greywater- and rainwater-harvesting earthworks, and how to maximize your greywater-irrigated landscape’s potential with passive solar design, food production, and oasis design. A slide show of various systems and site will give you a clear, virtual tour of possibilities. Tax rebates for rainwater- and greywater-harvesting systems will also be shared. Note: Greywater harvesting is not yet legal in all states. If needed, this talk can be given with examples of what has been legalized in other states. (Duration: Minimum 1 hour (plus Q&A). Maximum 2 hours (with Q&A))

Regenerative Rights-of-Way: Local Harvests and Enhancements in Our Community Commons

In the urban environment, streetscapes are our public land, our commons. They are abundant—one-third of a typical city’s footprint is pavement for motor vehicles. These streetscapes are usually designed as drains, rapidly ridding a community of such perceived “problems” as rainwater, stormwater, organic matter, fertility, and obstructions to traffic flow. This design often leads to ever-increasing costs for importation of water, flood control, pollution control, heat-island abatement, climate-change mitigation, and health problems.

But a simple shift in perception and design can enable us to see and utilize rainwater, stormwater, organic matter, fertility, and even some obstructions to traffic flow as free, local resources, which can be passively harvested to enhance local water supplies, control flooding, filter pollutants, grow cool-islands, mitigate the effects of climate change, and improve health—while generating more resources and more life .

The key is to see and enhance the free abundance that we already have in a way that transforms more of our built systems into living systems that can regenerate themselves and our communities.

Numerous successful examples will be featured. (Duration: 30–60 minutes plus Q&A)

Harvesting Water and More To Turn “Wastes” into Resources: The Story of Rain Beer, Urban Drool Harvesting, Managing Mega-Cities Like Forests, and more

This dynamic talk looks into how we tend to mismanage but could properly manage our most precious resource: water. Many examples and case studies are given that illustrate how we can sustainably enhance our water, energy, and food resources at home, within our communities, and beyond.  In addition, Brad will also cover water-harvesting from dirt roads, Portland’s Sustainable Stormwater Program, green burials, an urban farm irrigated solely by rain and stormwater, and more. Monetary savings associated with each example are dramatic, and these practices simultaneously enhance local resources and quality of life. Best of all, you can do the same. Includes audio where possible. (Duration: 1 hour plus Q&A)

Water Harvesting for Food Production:

Food is virtual water—originating from the source of irrigation. Local, sustainable food is all the rage, but we can take it further by growing that food with local, sustainable water. This talk covers the growing of food using rainwater, stormwater, and greywater for irrigation. Case studies include rain-fed greenhouses, dryfarming, backyard market gardens, granada greywater groves, and climate-appropriate traditional and appropriate plantings. (Duration: 1 hour plus Q&A)

Beneficial Ruins and Water Webs: A Vernacular Design Challenge to Increase the Resilience of Dryland Ecologies and Human Communities

This talk explores the idea of a beneficial ruin — a creation that improves the conditions of the ecological and human communities where it resides, even when abandoned. A beneficial ruin must be in relationship with its place and its people. Typically it acts as a web, passively harvesting and enhancing natural flows, so that at its best it generates other resources, even while regenerating itself. Examples of such ruins from the drylands of the southwest U.S. and the Middle East will be shared, with an emphasis on those that improve water, soil, food, and community. And you will be challenged to create and/or enhance such ruins or seeds of resilience in your place. (Duration: 1 hour plus Q&A)

Water-Harvesting Principles & the Story of an African Rain Farmer: Design Guidelines for Regenerative Water and Fertility Management

“You must plant the rain before you plant a seed or tree!” proclaimed rain farmer Mr. Zephaniah Phiri Maseko of Zimbabwe. By doing just that, he and his family turned a wasteland into an oasis, raised groundwater and well levels even in dry years, reduced flooding in wet years, and enhanced the fertility of the soils. This inspiring story will be shared along with the strategies used, and more importantly, the guiding principles that informed the choice, placement, and implementation of these strategies into a more integrated and productive system.

These principles work in any climate experiencing a dry season or drought, and they help us see and act more holistically by asking us questions that direct our attention to important aspects of water & fertility systems we might otherwise overlook.

We will discuss how these principles were created, and how you, too, can use them or create your own—even in other contexts—such as the harvest and enhancement of other free, on-site resources such as sun and shade. (Duration: 1 hour plus Q&A)

Mr Phiri, the African Water Farmer:

Description to come. Includes simple live demo. Intended audience: elementary-school students. (Duration: 45 minutes – 1 hour plus Q&A)

Water Wanderings and More in the Middle East:

Brad shares inspiring stories and images gleaned during his U.S. State Department-sponsored trip to Jordan and Saudi Arabia in 2009 and a return in 2010 to teach permaculture in Palestine and conduct research in Syria and Israel. Topics include: sustainable groundwater extraction with ancient gravity-fed qanats; the forgotten and refound cisterns of old Jeddah; revived Nabatean runoff farms producing almonds, carob, olives, pomegranates, grapes, figs, and more on just 4 inches (50 mm) of rain per year; Rainwater Tea; Revolving Community Loan Funds; Water Wise Women of Jordan; Tank Culture in a Water Truck Culture, the spiral cisterns of the Bell Caves, salvaged plastic bottle irrigation, and kunafa. (Duration: 1 hour plus Q&A)

Water Harvesting in Urban Environments:

Overpaved, drain-like urban environments eject precious local resources such as rainwater, creating the ‘need’ to import water from afar. This creates liabilities such as flooding, water shortages, pollution, and hotter temperatures paired with higher energy consumption. But we can create sponge-like urban environments that harvest resources such as rainwater, stormwater, greywater, and condensate as close to their sources as possible. In so doing, we turn would-be liabilities into assets such as street orchards that control flooding and produce food; more resilient and more numerous water resources; living filters of soil, water, and air; and temperature-reducing, energy-conserving and -producing oases of life. Examples, from small- to large-scale, from ancient to contemporary, from the Middle East and around the world, will be presented. (Duration: 1 hour plus Q&A)

Playing, Planting, and Partnering with Our Home’s Distinctive Genius Loci, or “Spirit of Place”

How can we each tap our unique essence and blend it with the distinct spirit of the place where we live in a way that lifts the vitality, health, and potential of all lives here? Through evolving stories of inspiration, water harvesting, wild food abundance, and local fountains of creativity, Brad will pose and seek to answer such questions with you.

Integrated Sun- & Shade-Harvesting for Buildings, Neighborhoods, Gardens, and Landscapes

This presentation demonstrates many simple, inexpensive, and highly effective strategies for the passive/free harvest of winter sun and summer shade to maximize comfort, generate energy, reduce water and power consumption, save money, and create more productive gardens and orchards. Topics/methods covered include:

• Why we have seasonally changing sun paths
• Sun-path dance—a fun way to wake up, as well as understand and teach the sun’s seasonally changing path
• Ideal orientation of buildings, trees, gardens, and food forests to the sun, with examples from the present and ancient past
• How to integrate the harvests of sun, shade, wind, and free on-site waters
• How to further enhance a building’s thermal performance with ideally sized roof overhangs/window awnings for equator-/winter-sun-facing windows in order to maximize summer cooling AND winter heating
• Winter-solstice shadow ratio—a quick and simple way to determine the longest noontime shadow an object will cast, and how to design around that extreme
• Solar rights
• Water-Energy-Carbon Nexus and how integrated design reduces the consumption of water and energy, while minimizing carbon emissions
• Integrated retrofits of existing buildings, and
• Solar cooking

(Duration: 45 minutes – 1 hour plus Q&A)

Desert Harvesters, Neighborhood Foresters, and Native Foods: Put ‘em in your mouth, your yard, your street, and your neighborhood

Check out this celebratory presentation on the history of Desert Harvesters, Dunbar Spring Neighborhood Foresters, and other dynamo local-food efforts that have enriched the Tucson community, ecosystem, and palates – and how you can likewise enrich the community where you live.

Learn about grinding mesquite (and carob) pods with a hammermill or a Suzuki 4 x 4; irrigating food-producing street trees with the street; planting and picking the best tree-beans; throwing pie, mulch, and pancakes parties; creating a thoroughly delicious community-tasted cookbook; regenerating ecosystems in your pantry and landscape, and growing friendships and neighborhood networks while you’re at it!

Primary goals of Desert Harvesters and Neighborhood Foresters , grassroots efforts based in Tucson, are to promote and enhance the awareness and use of locally native food sources, which can thrive on harvested natural rainfall and runoff without additional irrigation contributing to unsustainable groundwater depletion. We’re learning that by fostering a reciprocal relationship between native plants and local people we can enhance local food security, reconnect people with the ecosystem, and build a more dynamic and sustainable community. (Duration: 1 hour plus Q&A)

O n-site needs for a typical presentation

Water Harvesting

Aug 08, 2012

170 likes | 625 Views

Water Harvesting. Water harvesting measures. These are artificial recharge measures that capture rainfall and run-off and store it in the soil profile or add to the recharge. Water harvesting measures. There are many different types of water harvesting techniques – depending on:

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• artificial recharge measures
• percolation tank
• local water harvesting measures
• flood water
• impound stormwater flow
• recharge wells

Presentation Transcript

Water harvesting measures These are artificial recharge measures that capture rainfall and run-off and store it in the soil profile or add to the recharge

Water harvesting measures There are many different types of water harvesting techniques – depending on: • natural conditions (slope, soil, rainfall patterns) • local knowledge and traditions

Some examples of water harvesting measures • Recharge wells • Percolation ponds • Contour bunding • Checkdams and gully-plugs • Subsurface dams

By channelling run-off to disused dugwells, recharge wells are created Recharge well

Percolation tank These tanks collect rainwater and run-off and make sure it infiltrates

Contour Bund Intercepts the sheetflow and ponds up water in the gully, so that it infiltrates

Some examples of water harvesting measures Block and impound stormwater flow in riverbeds and gullies

Subsurface dams • These are built underground • They intercept subsurface flows in river beds • They serve both to recharge and to increase water tables in the area

Local water harvesting measures • Where possible small and low cost water harvesting structures – such as recharge wells - may be promoted, as these: • can be made with local and even individual investment • can be easily maintained + When people invest themselves in recharge it is also more likely that they will develop local rules on using groundwater

There are also many opportunities to integrate road planning with artificial recharge by having road bunds slowing down surface run-off

This bridge for instance doubles up as a checkdam! Flood water in the river bed is retained before it flows through the culverts Water retained here

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