A rain garden is vegetation designed to collect runoff from impervious surfaces, allowing water to infiltrate the ground. Rain garden plants are generally robust native species that can thrive in extremely wet and dry weather.
content...After the water ponds on the surface, its used by the vegetation in evapotranspiration and...
Download summaries of this SMP and its maintenance guidance, with quick reference information for clients and developers: 4.1.1 Bioinfiltration/bioretention introduction Bioinfiltration and bioretention stormwater management practices (SMPs), often referred to as rain gardens, are vegetated depressions or basins that use surface storage, vegetation, planting soil, outlet controls, and other components to treat, detain, and retain stormwater […]
Section 3.2 contains a significant amount of design guidance that the designer should use to integrate robust and cost-effective stormwater management into site designs in ways that achieve the Philadelphia Water Department’s (PWD’s) key stormwater management goals of minimizing the harmful effects of flooding and maintaining the health of Philadelphia’s streams and rivers. Additionally, this section […]
content...EvapotranspirationThe SMPs ability to manage stormwater runoff via evapotranspiration (ET). Each SMP is evaluated based...
content...propylene diene terpolymer ERSA Existing Resources and Site Analysis ET Evapotranspiration FLL German Landscape Research,...
Download summaries of this SMP and its maintenance guidance, with quick reference information for clients and developers: 4.9.1 Media filter introduction Media filters (also referred to as “filters” in this section) are structures or excavated areas containing a layer of sand, compost, organic material, peat, or other filter media. They reduce pollutant levels in stormwater runoff […]
content...designer is referred to Section 3.2.3 for information on using SMPs in series. Facilitating evapotranspiration, vegetated...
This section will guide the designer in performing a site assessment—the necessary first step in designing a project that complies with the Philadelphia Water Department (PWD) Stormwater Regulations (Stormwater Regulations), or a grant-funded Stormwater Retrofit project. The designer must know the site location and general development plan before beginning the site assessment process. The assessment consists of two […]
Cliveden Park collects runoff from two city blocks in Mt. Airy, thanks to a rain garden featuring step pools (pictured above).
content...system not only reduces the stormwater volume through evapotranspiration and infiltration, it also slows the...