A Better Way to Harvest Rainwater

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  • If you garden where too much rain is sometimes a problem, include shut-off valves on the hose outlets and a diverter on the downspout, so you can direct water from the downspout out into your yard when the garden would be harmed by excess water. 
  • Keep an eye on the barrel and hoses during the first few downpours. If you need the water to flow faster, drill more holes in the hoses. If the water is coming out too fast and causing erosion, tape some holes closed with duct tape.
  • If you try this approach, please write to us at letters@MotherEarthNews.com and let us know how it works out for you.
  • Learn more about rainwater harvesting in Harvest the Rain.

RAINWATER HARVESTING BOOKS

Water Storage by Art Ludwig
Focuses on the design of tanks for storing water, although one chapter concentrates on ponds. Includes detailed instructions for building a tank.

Create an Oasis with Greywater by Art Ludwig
Covers options for using recycled greywater (water that drains from washing machines, showers, bathtubs and sinks). Plumbing, regulations and common errors are explained.

Rainwater Harvesting for Drylands (Volumes 1, 2 and 3) by Brad Lancaster
Volume 1 is an overview covering the basics of rainwater harvesting. Volume 2 covers the collection and storage of water in earthworks (swales, ponds and terraces), the use of mulch and greywater systems. Volume 3 (not yet published) will explore roof catchment and cistern systems in further detail.

Rainwater Catchment Systems for Domestic Supply by John Gould and Erik Nissen-Petersen
A thorough book covering both roof and ground catchment systems. All aspects of collecting and storing rainwater (in a variety of environments) are covered with illustrations, diagrams, photos and case studies. In addition to technical information, the book discusses social and economic aspects surrounding water.

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Comments

  • Sue 9/13/2009 9:25:14 PM

    It is NO longer a crime in CO to have/use a rain barrel. The image shows the barrel overflowing. NOT good - use an appropriate sized overflow and safely redirect that water away from the foundation of your home! A great place for rain barrel kits and parts is: http://www.aquabarrel.com/index.php , http://www.aquabarrel.com/product_rain_barrel_plastic_parts.php

  • FountainJim 4/18/2009 9:54:15 PM

    I love the idea of catching rain water for the garden/yard what have you. However, in Colorado and other upstream western states, it is illegal to catch and store the water that lands on your property. This water actually belongs to the guys downstream (California, Kansas ...)

  • Sue 2/2/2009 10:06:11 PM

    You can find linking kits for 55 gallon barrels and lots of other rain barrel related stuff at Aquabarrel. They have all the parts you need to link barrels in series - When I needed extra help with sourcing parts for my rain barrel they were very helpful - ask for Barry - he's great at figuring out what you need to make your rain barrel system work...Aquabarrel comes up prety high in Google too so they must be pretty good at what they do

  • Becca 1/3/2009 7:24:38 PM

    My website describes (incl. pictures) how to build a rain barrel, and hook them up in series. You can also read top expert's opinions about rooftop collected water safety and use our harvesting rainfall calculator. All at:

    http://home.comcast.net/~leavesdance/rainbarrels/construction.html

  • clong 8/6/2008 10:44:38 AM

    Think of the SOIL as part of your storage system, HeirloomCountry. So if you get a light rain of only 1/8 inch, this system would put maybe twice that amount onto your garden beds. If you have had lots of rain and the soil is soaked, then you might want to divert rainwater away from the garden, temporarily. But otherwise, every time it rains your garden will get extra water from the roof runoff--it can be "stored" in the subsoil until the plants need it.

    Speaking of roof runoff, I have not seen any research to indicate that there are chemicals in runoff from asphalt shingles that would be toxic to plants. I would not advise drinking such water, but I would think it would be OK for irrigation purposes.

  • heirloomcountry 8/6/2008 10:29:44 AM

    Wait a minute though, I just finished reading this whole article, only to find out that I would then have the perfect set-up to water my garden- IN THE RAIN? (If it's raining, why do I need to WATER it?) I still have NOT increased the holding capcity of my barrel, only my ability to water with the still same amount that I had before. Now if an articles idea were to show one how to set up a multi-barrel containment system, say with an incorpoarted float valve on each, so that as one barrel "filled up" in the line, the water from the roof would then flow into the next barrel and so on down the line. Because yes, a 55 gallong barrel won't hold more than 55 gallons, no matter how many spigots or hoses you attach to it!

  • spat72 7/1/2008 8:20:00 AM

    A word of caution! Many chemicals may be in the runoff water if you have an asphalt shingle roof. I like the idea of using rain runoff but not a good idea for the garden if there is a lot of chemicals leaching from the roof into the water. My roof is one of those that does leach chemicals. Very obviouse by the burning of tender plants along the drip edge of my roof. I hope to someday replace it with a metal roof but for now it will have to stay. I am currently trying to think of a way to direct the water to a small retention pond for collection and cleaning by aquatic vegetation.

  • apbbear 6/26/2008 4:42:29 PM

    Great idea. Some cities north of the border already are sponsoring residents with rain barrel and set up kits. Though they ahve a dry year, they are concern about water shortage. Over here in California, we have droughts for years, warning of water shortage and possible rationing, but nothing was done by government agencies, city government, county non state. This is indeed very sad. Why wait until the last minute and rush out to get barrels to store water.

    We have been looking for rain barrels, but they were very expansive, not to spead of the shipping charges. Local hardware store in the San Francisco/San Jose Bay area did not carry any of these rain harvester/rain barrel in their inventory. It will be nice if someone can point to some good sources for good quality and very affordable rain harvest products.

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