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Topic: Rainwater harvesting

	An Introduction to Rainwater Harvesting
		Rainwater harvesting is convenient in the sense that it provides water at the point of consumption, and family members have full control of their own systems, which greatly reduces operation and maintenance problems.
		The feasibility of rainwater harvesting in a particular locality is highly dependent upon the amount and intensity of rainfall.
		Rainwater harvesting appears to be one of the most promising alternatives for supplying freshwater in the face of increasing water scarcity and escalating demand.
	www.gdrc.org /uem/water/rainwater/introduction.html (3126 words)

	Rainwater harvesting - Wikipedia, the free encyclopedia
		Rainwater harvesting is the collection and storage of rain from roofs or from a surface catchment for future use.
		Rainwater may also be used for groundwater recharge, where the runoff on the ground is collected and allowed to be absorbed, adding to the groundwater.
		Rainwater Harvesting Forum - This is a free and open forum for discussion of rainwater harvesting as alternative source of water for household, garden and rainfed farming needs.
	en.wikipedia.org /wiki/Rainwater_harvesting (945 words)

	Rainwater harvesting (Site not responding. Last check: 2007-10-15)
		Rainwater harvesting can provide lifeline water for human consumption, reduce water bills and the need to build reservoirs which may require the use of valuable land.
		Currently in China and Brazil, rooftop rainwater harvesting is being practised for use for all the above purpose.Gansu province in China and semi arid North East Brazil have the largest rooftop rainwater harvesting projects ongoing.
		Rainwater Harvesting and Purification System - A case study is given to understand the basic process of collection and use of rainwater.
	members.rediff.com /asitsahu (737 words)

	Graywater Reuse and Rainwater Harvesting
		Rainwater harvesting is the process of intercepting storm-water runoff and putting it to beneficial use.
		It is recommended that before you develop a rainwater harvesting system you check with the Colorado Division of Water Resources and your local building, zoning, and environmental departments to determine what plumbing requirements, local restrictions, neighborhood covenants, or other regulations or guidelines might apply to your project.
		Rainwater catchments, distribution systems, and landscape holding areas must be located and used entirely within the property boundaries of the individual or entity building using the system.
	www.ext.colostate.edu /PUBS/natres/06702.html (2386 words)

	1.1 Rainwater harvesting from rooftop catchments (via CobWeb/3.1 planetlab2.cs.virginia.edu) (Site not responding. Last check: 2007-10-15)
		Rainwater harvesting has been practiced for more than 4, 000 years, and, in most developing countries, is becoming essential owing to the temporal and spatial variability of rainfall.
		Rainwater harvesting is necessary in areas having significant rainfall but lacking any kind of conventional, centralized government supply system, and also in areas where good quality fresh surface water or groundwater is lacking.
		Rainwater harvesting is used extensively in Latin America and the Caribbean, mainly for domestic water supply and, in some cases, for agriculture and livestock supplies on a small scale.
	www.oas.org.cob-web.org:8888 /usde/publications/Unit/oea59e/ch10.htm (4479 words)

	Sourcebook Harvested Rainwater
		In this section, Harvested Rainwater is rainwater that is captured from the roofs of buildings on residential property.
		Harvested rainwater can be used for indoor needs at a residence, irrigation, or both, in whole or in part.
		Rainwater harvesting systems designed to fill all the water needs of a home can be similar in cost to the expense of putting in a well.
	www.greenbuilder.com /Sourcebook/Rainwater.html (882 words)

	Environment Agency - Rainwater Harvesting (Site not responding. Last check: 2007-10-15)
		Rainwater Harvesting is the collection of water that would otherwise have gone down the drainage system, into the ground or been lost to the atmosphere through evaporation.
		Rainwater harvesting systems can be installed in both new and existing buildings, and the resulting water used for all purposes except drinking.
		Suppliers of rainwater harvesting systems currently claim savings of over 14% of water used by the average household, but due to the relatively low cost of mains water in England and Wales the payback time may be quite lengthy.
	www.environment-agency.gov.uk /subjects/waterres/286587/511050/?lang=_e (795 words)

	Rainwater Harvesting Guide
		Pragya Project began by mapping the harvesting potential of the area, documenting the traditional knowledge and practices of water sharing in the community and then on to making the community itself aware of the best budgeting, accounting and management practices.
		A concrete wall to one side and boulders against a metal-wire mesh the snow water harvester is a prototype for the region.
		Harvesting snow water in cold desert regions is not merely a way to rehabilitate the land for crop growth, as it is also a way to bring cultural identity to a people in between the ancient times and the rapid pace of a global world.
	www.rain-barrel.net (506 words)

	Can rainwater harvesting be a solution to drinking water
		Rainwater in rural areas - away from atmospheric and industrial pollution - is fairly clean except for some dissolved gases it may pick up while traveling through the atmosphere.
		Although rainwater harvesting will not be able to replace all other sources of drinking water, it will certainly be able to ease the pressure on surface water and contaminated groundwater usage as the primary source of drinking water.
		The development of a rainwater harvesting plan that is economically and technically feasible for the majority of the people in Bangladesh should be given high consideration as a part of the integrated water resources management plan.
	www.eb2000.org /short_note_4.htm (1565 words)

	Brooklyn Botanic Garden: Rainwater Harvesting
		Rainwater harvesting prevents rain from becoming polluted stormwater and puts it to use where it falls.
		Captured rainwater is free of the salts and pollutants associated with ground and surface water.
		Rainwater harvesting began as early as 4,000 years ago in the Middle East, where runoff was collected in ditches for crop irrigation.
	www.bbg.org /gar2/topics/sustainable/2005sp_rainwater_harvesting.html (1847 words)

	Rooftop rainwater harvesting
		Since rainwater is dumped into the city sewer system, King County is capturing water that would otherwise be wasted and avoids significant loadings to the sewer system.
		Rainwater collected only for non-potable use such as irrigation, requires installers to avoid materials that can leach zinc or copper, which can damage landscape plants.
		SPU is also looking at larger-scale rainwater capture at Sand Point Magnuson Park where the water would be used for a community garden, and the utility is looking at possible rainwater harvesting for irrigation around multi-family projects.
	www.psat.wa.gov /Publications/LID_studies/rooftop_rainwater.htm (1235 words)

	Rainwater harvesting - recycling systems from Freerain
		Rainwater harvesting quite simply collects the rain which fall onto roofs, then stores it in a tank until required for use.
		Rainwater harvesting is not a new concept; however, over the last century its use has diminished with the availability of a clean, inexpensive and reliable water source through the mains supply.
		Rainwater is captured from the roof(s), and brought to a central point, via normal guttering and down-pipes, to enter a storage tank (frequently underground), where it is filtered on entry.
	www.freerain.co.uk (434 words)

	Rainwater Harvesting
		Rainwater conservation for sustainable farming - Soil and water conservation in Kenya.
		Rainwater Harvesting in Honduras - Domestic and agricultural use of rainwater in Honduras.
		TWAD - Rainwater Harvesting - Information on the history of water harvesting methodologies in Tamilnadu (India) and the modern methods adopted for rain water harvesting structures and advised by TWAD Board for both individuals and professionals.
	www.savetheenvironment.com /rainwaterharvesting.htm (745 words)

	Rainwater Harvesting for Drylands: Guiding principles to welcome rain into your life and landscape
		Rainwater Harvesting for Drylands, Volume 1 is the core of the complete three-volume guide on how to conceptualize, design, and implement sustainable water-harvesting systems for your home, landscape, and community.
		Although rainwater harvesting has been accomplished by humans in virtually every drought-vulnerable region of the world for millennia, our society seems to have some collective amnesia about the utility, efficiency, sustainability, and beauty of these time-tried practices.
		And yet, those of my neighbors who harvest water off their roofs, parking lots, or slopes (as we do) have never had to haul in water during the last six years of subnormal precipitation, and elderly Hopi farmers have still produced crops every year in the floodwater (ak-chin) fields.
	www.oasisdesign.net /water/rainharvesting/drylandsbook/index.htm (1293 words)

	[No title] (Site not responding. Last check: 2007-10-15)
		Rainwater harvesting means making use of each and every drop of rainwater to recharge the groundwater, by directing the rainfall to go into the well or under the ground, without wasting the rainwater.
		The main aim of water harvesting is to conserve rainwater in the areas where it falls so that it may satisfy local needs.
		Rainwater can also be stored in underground storage tanks (water sumps) for a few months and used directly for washing, flushing and other domestic purposes.
	cpreec.org /04_articles/harvesting_rainwater/harvesting_rainwater.html (1183 words)

	LCRA: Feature Story: Is rainwater harvesting for you?
		This rain harvesting system is the water source for the greenhouse at LCRA's Cooper Farm Natural Science Laboratory in Fayette County.
		In the early 20th century, rainwater collection was common in Texas, but with the development of city and rural water systems the practice diminished greatly.
		Rainwater harvesting is the process of collecting and storing rainwater for future use.
	www.lcra.org /featurestory/2005/rainwaterharvesting.html (280 words)

	How is Rainwater Harvesting done ?
		The harvested rainwater can not only be used to meet water requirements of the city, it also recharges groundwater aquifers.
		Beyond generalisations, it is the requirement that governs the choice of water harvesting technique.
		For example, in Ahemadabad, which has limited number of rainy days as that of Delhi, traditional rainwater harvesting tanks, known as tankas, are used to store rainwater even today in residential areas, temples and hotels.
	www.rainwaterharvesting.org /Urban/Howtoharvest.htm (388 words)

	Resources > Films > Rainwater Harvesting
		An urgent need for community managed and controlled initiatives is to collect rainwater where it falls by providing specific efforts taken in three different villages of the state - as examples to combat drought.
		Initiatives of communities with their voluntary labour in constructing rainwater harvesting structures and desiltation of village ponds to revitalise shallow open dugwells and handpumps that are visually documented provide a rationale for such measures to be the only long term sustainable solution.
		The presentation gives arguments for the critical need to regenerate the groundwater table through rainwater harvesting for revitalising shallow open dugwells and handpumps in a given catchment area.
	www.barefootcollege.org /res-rwh-film.htm (220 words)

	TWAD - Rainwater Harvesting
		As individuals, groups and communities, let us all wake up before it is too late and not only understand what rainwater harvesting is all about but also implement measures to harvest rainwater in our houses and flat complexes and put it into the soil for our subsequent use.
		In areas where the water becomes yellow due to presence of iron salts, rainwater harvesting will progressively leach out these salts leading to clean water availability in the long run.
		Flooding of low lying areas and roads can be avoided to a large extent, since rainwater that is not harvested both within the house as well as outside is mainly responsible for flooding.
	www.aboutrainwaterharvesting.com /rwh.htm (435 words)

	Rainharvesting Systems - water conservation, recycling and reuse
		We are now the sole UK distributors for WISY AG, the German market leading manufacturer of specialist rainwater harvesting equipment, including their range of renowned filters.
		We have supplied rainwater harvesting systems for many types of buildings from garden sheds and houses to office buildings, industrial units, schools, garden centres and even environmentally friendly toilet blocks.
		Rainwater harvesting equipment is the latest addition to the Water Technology List, giving businesses the opportunity to claim 100% capital allowance on the purchase and installation costs of specific components.
	www.rainharvesting.co.uk (505 words)

	Rainwater Harvesting (Site not responding. Last check: 2007-10-15)
		Rainwater harvesting techniques can provide a free, higher-quality source once the initial investment in collection and storage systems is recouped.
		The parts of a complete system include the catchment area (a roof), a rainwater conveyance system (gutters and leaders), holding vessels (cisterns), a roof-wash system (usually the first 10 -20 gallons of rain are diverted from the cistern), a delivery system (pumps) and a treatment system (filters and/or purifiers).
		In areas not served by a municipal water supply, or in drought-prone areas, installing a rainwater catchment system may actually be the most convenient and economical option.
	www.toolbase.org /techinv/techDetails.aspx?technologyID=109 (787 words)

	Rainwater Harvesting and Purification System
		A rainwater harvesting system can be as simple as a barrel connected to a downspout.
		According to two officials in Alaska and Hawaii with whom I have communicated, there is a long established tradition of rainwater collection in some parts of their states.
		Sourcebook Harvested Rainwater, in some areas of the Caribbean, new houses are required to have rainwater capture systems.
	www.rwh.in (1692 words)

	Rainwater Harvesting: Complex Systems (Site not responding. Last check: 2007-10-15)
		To maximize the benefits of rainwater harvesting, complex systems build in storage to provide water between rainfall events.
		Complex rainwater harvesting systems include catchments, conveyance systems (connecting catchments to storage containers), storage, and distribution systems (directing water where it is needed).
		But during the winter months, rainwater supply exceeds demand due to low evapotranspiration rates, so water can be saved for spring and early summer water deficit periods.
	rainwaterharvesting.tamu.edu /complex.html (1990 words)

	The Rainwater Connection Home Page
		Rainwater harvesting is an ancient technique that is common place in many areas of the world and is enjoying a big revival in popularity in North America because of its inherent qualities.
		Rainwater is almost neutral in ph, free of salts and minerals, and if collected properly, virtually free of natural and man made contaminants.
		.C., is committed to rainwater harvesting as an alternative, sustainable source of water.
	www.rainwaterconnection.com (193 words)

	Plan B: Rescuing a Planet Under Stress and a Civilization in Trouble, Chapter 7: Raising Water Productivity--Rainwater ...
		But because sites were becoming scarce and because the construction of large dams often inundates large areas, displacing local populations and irreversibly altering local ecosystems, this era has now largely run its course.
		As he surveyed the area and talked with villagers, he saw that local earthen dams to collect and store rainwater would help satisfy the need for water, both for residential use and for irrigation.
		In summary, water harvesting and local water storage behind dams and in aquifers expands the supply and strengthens the local economy.
	www.earth-policy.org /Books/PB/PBch7_ss4.htm (807 words)

	Rainwater Harvesting at Tex-Zen Ranch (Site not responding. Last check: 2007-10-15)
		After also researching other rainwater harvesting sources and case histories, we determined that this was the alternative of choice over drilling an 800-900 ft deep well to sweeter water.
		The principal of this type of system is based on the fact that the first 10 or so gallons of rainwater washed from the roof surface contains most of the dirt and contaminants that have settled onto the roof and gutters.
		Those ten gallons of dirty rainwater are diverted to the vertical tubing and then the additional water that is collected in the gutters flows directly into the tank.
	www.texzendreams.com /rainwaterharvesting.htm (869 words)

	Integrated Rainwater Harvesting Solutions (Site not responding. Last check: 2007-10-15)
		An integrated rainwater harvesting system, which can incorporates a first flush diversion, a rainwater tank with an electric pump to utilize the stored water for non-potable uses.
		In Australia the use of domestic rainwater tanks is an established and relatively common practice, particularly in rural and remote areas.
		Use of rainwater tanks as the main source of water for gardens (3%) or bathing, showering and washing (6%) is less common.
	www.aussiehomerainwaterharvesting.com /index.htm (487 words)

	LCRA: Water: Rainwater harvesting (Site not responding. Last check: 2007-10-15)
		A common practice in the early 20th century, rainwater harvesting is becoming popular again in Texas for several reasons.
		Rainwater is naturally softened, so it lacks the minerals found in ground and surface water, making it easier on your plumbing.
		In 2005, the Texas State Legislature established a Rainwater Harvesting Evaluation Committee to study rainwater harvesting in Texas and recommend guidelines and standards for rainwater use.
	www.lcra.org /water/rainwater.html (284 words)

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