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How to harvest rainwater — Homestead — Bangor Daily News — BDN Maine

No matter when you stay in the rainy Pacific Northwest or the bone-dry Southwest, your land enjoys the occasional refreshing rainstorm. Instead of letting this rainwater wash away, harvest and utilize it in your backyard or residence.

“We’re experiencing a warming climate, and water scarcity is becoming an increasing reality,” stated Roslynn Brain McCann, sustainable communities extension specialist at Utah State University Moab. “We’re moving away from relying on municipal water.”

Harvesting rainwater cannot only allow you to save water and spend less on your bills, however it might additionally assist you to higher manage the ecosystem of your property.

“If you do it in an integrated manner, not only is it very high-quality, free water source, but it will also help you reduce onsight flooding,” stated Brad Lancaster, writer of “Rainwater Harvesting for Drylands and Beyond.”

Harvesting rainwater may also be useful for native ecosystems.

“When you have a big stormwater surge after a rain event, it’s all going out into the street at the same time,” McCann defined. “That carries debris, pollutants, stress local waterways.”

Using rainwater in lieu of municipal water additionally eases the stress that municipal water techniques actual on local aquatic ecosystems.

“We’re keeping more of that water in the places that it needs to be,” McCann added. “This also relates to reducing the need to withdraw water from lakes and streams. The less that we are pulling from other systems, ideally the more water will remain in them.”

What are you able to do with rainwater?

Lancaster stated you possibly can principally use rainwater to do something you do with different water: cooking, washing, flushing bogs and every part in between.

Harvested rainwater is particularly good for irrigating gardens or outside landscaping. Lancaster stated that within the West, groundwater and surface water tends to be actually excessive in salt which is problematic for crops. Rainwater additionally accommodates natural fertilizer in the form of nitrogen fastened by atmospheric forces like lightning.

You also can harvest and store rainwater in instances when drought or different emergencies compromise your entry to municipal water supplies and electricity.

“You can set it up so that it can be a water source that’s available even when the power goes out,” Lancaster stated. “It’s very easy to make it a gravity-fed system [that does not require power].”

Is it authorized to gather rainwater?

The guidelines governing rainwater assortment rely upon the place you live.

“Different states have different policies,” McCann stated. “In Utah, many people think it’s still illegal because it had been for quite a while.”

Some states, like Kansas, require permits for rainwater assortment normally, while others have specific limitations or restrictions — for instance, on the dimensions of rain barrels.

“The state of Utah allows for 2,500 gallons in an above or underground tank. It could be in many tanks, but it cannot total more than 2,500 gallons without a special permit,” McCann stated. “Mine is 1,500 gallons, and I’m not even using the full potential of my house.”

In order to find out the place the laws are the place you live, contact your local authorities.

“You can call your local building inspector,” Lancaster stated. “Sometimes, it might be your Department of Environmental Quality, but I would start with the building department.”

Can you drink rainwater?

You can drink rainwater so long as it is properly filtered earlier than you eat it.

“If you’re going to drink it or cook with it, just play it safe and filter it before you do so,” Lancaster stated.

The filter you select will rely on your needs, preferences and the financial commitment you’re prepared to make. Lancaster stated he uses a Big Berkey gravity-fed activated charcoal filter.

“If you’ve got problems on your roof, lead flashing or air contamination, it’s really good for those things,” he stated.

If you propose to drink your rainwater, Lancaster stated you also needs to ensure to select protected materials and paints on your roof and gutters.

“Choose non-toxic roofing materials and gutter materials,” Lancaster warned. “[Choosing paint with] no lead flashing is a big one. Paint should be toxin-free or biocide-free — [biocides] inhibit moss and growth and stuff — because that’s going to go in your water.”

Lancaster stated you wouldn’t have to filter the rainwater you employ to irrigate your crops, or to wash your self and other gadgets.

How to choose a rainwater tank

The most essential facet of selecting a rainwater catchment system, the equipment that may gather and divert the rainwater you acquire, is its measurement.

“In the water harvesting world, rain barrels are often referred to as the gateway drug into waterwise landscaping,” McCann stated. “They get homeowners excited about harvesting rainwater but they are kind of impractical when you think about the size. A 50 gallon rain barrel not much at all.”

Lancaster additionally suggested towards small rainwater catchment techniques.

“They’re just toys,” he scoffed. “They fill up really quick and empty really quick. If you’re really looking to use rainwater as a significant water source, you have to have a tank large enough to capture a usable amount that’s going to make a difference.”

McCann stated that there are some useful equations and on-line calculators that provide help to to estimate the dimensions of the rainwater tank that you simply want.

“My rule of thumb is that if you’re going to size a tank, the absolute smallest it should be is to handle all the water coming off the surface you’re collecting on in a typical spring rain,” Lancaster stated.

Lancaster stated he recommends buying a tank that is even larger than that, just to make sure you have got all of the area you need.

“I want the tank to handle at least 25 percent of all the rain falling on my collection surface in a rainy season,” he explained. “Start with 25 percent because you will be emptying the tank repeatedly through the rainy season and creating more capacity.”

Materials can also be a consideration if you end up choosing your tank.

“In terms of materials, it depends on you and your site,” Lancaster stated. “Plastic tanks can be cheap and easy to install and carry but they don’t last as long. Depend son how you install it, in full sun or not.”

Metal tanks last more, and are often lined with plastic. Lancaster stated that concrete is great for underground tanks.

“You can seal it with potable-grade sealers,” he stated. “The great thing about concrete is that it doesn’t burn, double as firebreak.”

Rainwater tanks additionally include quite a lot of display types. Screens that sit flat on rain tank are widespread, but McCann suggested towards advocate them.

“If your rain tank is above eye level, you’re not going to easily see the screen,” she stated. “If it’s out of sight, a lot of times, it’s out of mind.”

McCann really helpful a display referred to as a rain head, which is situated at an angle and comes down off the spout of the tank.

“Because it’s at an angle, when you walk by you can easily see debris and wipe it off,” she explained. “As a homeowner, you have to consciously think about looking for debris if you can’t see it when you walk by.”

Placing your rainwater tank

Lancaster stated that when it comes to putting his tank, he tries to put it in the spot the place it should acquire probably the most water and in addition at elevation in order that the water that the tank collects can simply circulate out.

“I want my tank so it’s low enough to collect water from the roof but also as high as I can so it’s gravity-fed as much as possible,” he defined.

Your climate additionally issues for where you set your rain tank.

“If you’re in a colder climate, want to make sure putting tank on the south side of tree so it’s getting winter sun,” Lancaster suggested.

You additionally need to put your tank in a spot that won’t trigger algae construct up.

“Algae grows primarily with sunlight,” McCann stated. “When you’re experiencing algae, you either have a transparent tank or there’s an opening at the top where a lot of sunlight is getting in. The best way to prevent algae is to make sure it’s dark where that water is being stored.”

You can even select a location in your tank that may give it multiple uses, akin to a privacy display, structural aspect or a pillar of a coated porch.

“I would challenge one to think how that tank can be more than a water storage vessel,” Lacaster stated.

Other methods of harvesting rainwater

Not all rainwater harvesting methods require a tank, though.

“You can do it in a way where you don’t even need a tank,” Lancaster stated. “The cost of the endeavor can be no more than the price of a shovel and some sweat.”

Lancaster stated rain gardens are one other good way to harvest and make the most of the precipitation that collects in your land.

“My approach is [to] make this as integrated and multifunctional as possible,” he stated. “Let’s prioritize edibles.”

Lancaster’s web site, Rainwater Harvesting, has quite a lot of free assets to aid you get started planning a rain backyard that greatest utilizes your assets and helps you develop meals.

If you propose your landscaping with harvesting rainwater in thoughts, it should prevent a lot of money and time on your garden.

“Here’s the mantra: plant the rain before you plant any plant,” Lancaster stated. “Right off the bat, you’re setting yourself on a path where free onsite water is going to be your primary irrigation source.”

The challenges of amassing rainwater

New rainwater collectors typically don’t assume of what is going to happen when their tanks overflow.

“A lot of people go right to thinking of a tank,” Lancaster stated. “Here’s a thing people rarely think of: where will you address the overflow of the tank and how will you do so in a way that will not waste resources?”

McCann advisable using an overflow pipe popping out of the highest of the tank to stream right into a backyard or a part of the landscaping as an alternative of out into road.

“The biggest mistake I’ve seen homeowners make when harvesting rainwater in a rain tank or barrel is improper overflow and improper screen,” McCann stated. “Just make sure that the overflow is going somewhere useful not just down a paved driveway.”

Standing water within the rainwater tank also can appeal to mosquitoes.

“When you have a gaping hole or any hole in the top of your rain tank, it’s a mosquito breeding ground,” McCann stated. “You want to make sure you have proper screening systems.”

“If you have a system that’s generating mosquitoes you have a bad system,” Lancaster added. “All tanks should be screened off from all insects and critters. There’s a chance that mosquitoes get in, lay in gutters, eggs go through screen, but as long as you have screens they can’t get out.”

Ultimately, though, Lancaster, who lives on rainwater as his sole water source, believes that navigating these challenges is value it.

“You’ll wake up at three in the morning to check out have everything is working because it’s so fun,” he chuckled.