Specific reductions depend on the ammunition and suppressor. 223 caliber bolt-action rifle firing high-velocity (supersonic) ammunition using a GEMTECH G5-5.56 suppressor. The peak sound pressure levels of a Remington 700. Now that youve got a suppressor on your 9mm handgun, you need some subsonic ammunition like this load from Fiocchi. Rain gardens are shallow depressions in the landscape that typically include plants and a mulch layer or ground cover.223 caliber bolt-action rifle firing low-velocity (subsonic) ammunition using a GEMTECH G5-5.56 suppressor.Ĭompared to the high-velocity (supersonic) unsuppressed condition, the combination of subsonic low-velocity ammunition and a firearm suppressor provided a reductions of 45, 38, 40, and 48 dB, peak sound pressure level at the muzzle, left, right ears and behind the shooter, respectively. In addition to providing increased groundwater recharge, they are expected to provide pollutant treatment. Pollutant treatment in rain gardens has been attributed to adsorption, decomposition, ion exchange, and volatilization (Prince George's County Bioretention Manual, 2002). Rain gardens can be used in residential settings to accept runoff from a roof or other impervious surface. In a commercial setting, bioretention areas are similar to rain gardens, but are often larger, and have an engineered design. Why a Rain Garden?Įvery time it rains, water runs off impervious surfaces such as roofs, driveways, roads and parking lots, collecting pollutants along the way. This runoff has been cited by the United States Environmental Protection Agency as a major source of pollution to our nation's waterways. By building a rain garden at your home, you can reduce the amount of pollutants that leave your yard and enter nearby lakes, streams and ponds.These designs come from The Old Farmer’s Almanac Garden Guide. A rain garden creates a “trap” for that water! Get the latest edition here! What Is a Rain Garden?Ī rain garden is a shallow, bowl-shape area that collects water runoff from impervious surfaces such as downspouts, sump pumps, paved areas, roofs, driveways, walkways, and lawns. Often, the heavy rain from a thunderstorm comes down so quickly that the water doesn’t have time to soak into the ground, which means the water isn’t even available in the soil for thirsty plants to take up. Rain gardens are also good for the environment. Like a native forest, rain gardens use heavy rain to recharge the aquifer, support wildlife habitat, and also filter out toxic materials before they can pollute streams. Whether you deal with drought, the rising cost of municipal water, or simply want to make the best use of our water, Mother Nature is providing this precipitation for free. Trees and large shrubs deflect rainfall, slowing it down before it reaches the ground, which allows it to better soak into the soil and not run off immediately.Plants of all types and sizes help to manage storm water, so it’s a good idea to plan for a range of species! Image Credit: WSU Choosing Plants for a Rain Garden The plants for rain gardens are some of our favorites, especially the natives that attract beneficial and pollinating insects, butterflies, and birds. Tall grasses act as filters, sucking up water, trapping pollutants, and preventing silt from being carried off into ponds or rivers. Shorter, well-established, deeply-rooted plants hold soil and direct water into the ground. See our full lists of rain garden plants for sun and shade below. A wildlife habitat (birds, butterflies, and beneficial insects will be drawn to the garden).Recharged groundwater supplies (a rain garden soaks up at least 30% more water than a lawn).Here are just five of the many benefits of creating a fully-functional rain garden: What do you gain when you catch the rain? Shower power! An inch of rain on a 100-square-foot surface results in 60 gallons of water! RAIN GARDEN FULL pesticides and lawn treatments that contain high concentrations of nitrogen and phosphorusĬreating a rain garden can be as simple as directing the flow of water from your roof to a spot that you’ve already planted with water-loving plants-or you can start from scratch.roads, parking lots, paved driveways, and sealed surfaces (including roofs) that contain oil and other contaminants.Storm water runoff, from flooding or even heavy rainfall, contains 70% of the pollution that flows into our lakes, ponds, rivers, and streams. The size of the garden depends on the size of the impermeable area draining into it. Aim to make the bed 20% to 30% the size of the roof or driveway from which the water is being funneled. Garden to hold the runoff from a 1000 sq.
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