Landscaping Techniques Can Help Save the Watershed
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New Landscaping Techniques Help Save the Watershed
April - 2011
Did you know that the the EPA wants to encourage homeowners to replace ferlizer-hungry turf grass with hardier native plants that need less watering? Fertilizers high in chemicals such as phosphorus and nitrogen wash downstream and pollute the Chesapeake Bay and cause "dead zones". This is also true of other bodies of water - including the Gulf of Mexico.
Lawns polluting the Bay? But what about the farms? This year, the Chesapeake Stormwater Network, an advocacy group found that turf grass was the largest "crop" in the Chesapeake watershed -more a problem than any crop grown on farms.
New thinking is required in order to have an environmentally-conscious yard. Rainwater that falls onto lawns runs into storm sewers mixing with runoff from parking lots and roads ultimately end up in the watershed. This is an urban area's wash water and it accounts for 8% of the nitrogen and 15% of the phosphorus entering the Chesapeake. It continues to grow because of development. The states envision more areas of grassy ditches to slow down runoff.
Ideally the first option is to replace grass with native plants that need no fertilizer and less watering.
Or, homeowners could replace some of their grass with a "rain garden" which catches the water in a depression and lets it soak into the roots of trees and shrubs. Other more expensive options are permeable pavers.
Montgomery County, Maryland (RainScapes) and the District (RiverSmart) provides guidance and a rebate up to $1200 for Residential Property (and up to $5000 for Commercial, multi-family, or institutional property, RainScapes program only).
For new development the proposed EPA rules could be costly. In Annapolis, authorities have outlawed most use of fertilizer containing phosphorus on lawns. Virginia and Maryland officials said they could Imagine other jurisdictions adopting similar rules. In Montgomery County drainage rules enacted in 2007 apply when there are significant additions on small lots.
So what are the RainScapes and RiverSmart program? The RainScapes program promotes and implements projects on residential, institutional, and commercial properties to reduce stormwater pollution. The County offers technical and financial assistance (in the form of rebates) to encourage property owners to implement eligible RainScapes techniques on their property.
Eligible Rainscape (Montgomery County)Techniques for Rebate (similar residental incentives from the District's RiverSmart, no commercial rebates available in the District)
Rain garden/Swales
Rain gardens are shallow gardens designed to capture and soak up stormwater. Swales are like shallow ditches where water can sit for a day or so before it sinks into the soil.
Maximum Residential Rebates: $1,200
Maximum Commercial, Multi-Family, Institutional Rebates: $5,000 total; based on $1/ sf impervious area treated or $2,500/rain garden, whichever $ is greater.
Conservation Landscaping
Conservation landscaping uses native plants that are adapted to local rainfall and soil conditions to replace part of your traditional lawn.
A tree canopy is created when trees planted near each other create an umbrella or canopy of leaf cover that shades the ground. Tree leaves intercept rainfall and their roots absorb it.
Residential: $600 per lot; $150/tree
Commercial: $600 per lot; $150/tree
Permeable Pavers
Replacing the hard, impermeable surfaces on your property with materials such as permeable pavers allows rainwater to soak into the ground. This reduces the amount of runoff that leaves the property.
Residential: $1,200; 100 square foot minimum
Commercial: $5,000; 350 square foot minimum
Pavement Removal
Residential: $600 - $1,200; 100 square foot minimum; rebate amount varies depending on planting material
To participate, your property must be located in Montgomery County, Maryland outside of the municipal limits of the City of Rockville, City of Takoma Park, or City of Gaithersburg. Projects are not eligible if they are associated with permit approval requirements for new building construction, additions, or renovations. Residents of Gaithersburg can participate in the Gaithersburg RainScapes Program. Residents of the City of Rockville can participate in the Rockville RainScapes Program.
Washington DC: How to Become a RiverSmart Home
Schedule the District Department of the Environment (DDOE) to come out to your residential property to perform an analysis of what changes you can make to reduce stormwater runoff. Simply fill out an online application.
Contact the following businesses that can design beautiful "green" solutions that help protect our waterways - and gain you a rebate!