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4.9 Media Filters page

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...

Stormwater Trees page

Stormwater trees look like typical street trees, but these specially designed systems include a deep stone pit that holds excess water during intense rainstorms and as snow melts.

content...stormwater capture, treatment, and infiltration. Trees help reduce the volume of stormwater runoff through evapotranspiration....

Green Gutters page

Green gutters are narrow, shallow landscaped strips along a street’s curb line that are designed to allow stormwater runoff from both the street and the sidewalk to flow directly into the system.

content...gutter vegetation helps reduce the volume of stormwater runoff through evapotranspiration. Green gutters are typically...

Downspout Planters page

Connected to the roof, downspout planters allow stormwater from gutters to flow through and be absorbed by vegetation. The systems temporarily store runoff and filter sediment and pollutants as water infiltrates through the planter.

content...runoff into the ground. Rather, they rely on evapotranspiration and short-term storage to manage stormwater....

Green Roofs page

A green roof is a roof fully or partially covered in plants and waterproof media that helps reduce the volume and velocity of stormwater runoff from roofs by temporarily storing stormwater, slowing excess stormwater release, and promoting evaporation.

content...stormwater, slowing excess stormwater release into the combined sewer system, and promoting evapotranspiration. Diagram of...

3.1 Site Assessment and Stormwater Management Strategies page

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 […]

This Place Is BMPing: Cliveden Park blog post

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...