Green streets are proposed as upstream connections to all conveyance or retention areas. The green streets should be established with a combination of small scale channels and stormwater planters or permeable paving. Stormwater should be collected, delayed, and then channeled toward conveyance (cloudburst) roads.

Stormwater medians incorporate large, green, depressed areas that can detain and retain stormwater while allowing regular traffic use of the street. They require taking away space from existing roads, but can be very effective along larger urban arteries that are underutilized. Some large-scale versions can be considered retention boulevards.

Stormwater medians incorporate large, green, depressed areas that can detain and retain stormwater while allowing regular traffic use of the street. They require taking away space from existing roads, but can be very effective along larger urban arteries that are underutilized. Some large-scale versions can be considered retention boulevards.

Retention alleys are typically located upstream of vulnerable low-lying areas. In these streets the impermeable street surface is replaced with a permeable surface that allows for slower absorption and subsurface storage before connecting to a storm sewer. Usually maintain a vehicle-oriented roadway.

Green alleys are typically located upstream of vulnerable low-lying areas. In these streets there should be a retention volume established and detention to slow the peak flow of water reducing flooding downstream. Detention streets allow slowed conveyance and possible retention through stormwater planters, hardscape channels, and permeable paving. These alley types often prioritize multimodal use or even prohibit cars.

Floodable parks and recreation spaces present the greatest opportunity for large retention spaces within urban areas. They can be located throughout the watershed and receive stormwater conveyance systems or adjacent water bodies. They can provide a combination of hydrological services including water quality improvements via retention, detention, and infiltration.

Green Schoolyards combine green stormwater infrastructure engineering with research on how nature can foster cognitive development and physical and mental health to create benefit-rich outdoor spaces. Elements include nature-inspired play equipment, outdoor classrooms, vegetated rain gardens, etc.

A publicly accessible outdoor space comprised of Mississippi Watershed Management Organization’s Stormwater Park & Learning Center visible landscape features that capture, clean, and reuse stormwater runoff. These parks provide recreational and learning opportunities about sustainability through interactive signage and design, and also often through an accompanying building that exemplifies sustainable practices and offers community programming about sustainable development.

Urban creeks can involve daylighting historic streams, formalizing existing streams, or creating new streams as conveyance connections between other cloudburst elements. Typically smaller in scale, urban creeks can re-establish or create new neighborhood character and social spaces.

Stream Restoration and re-profiling existing urban water edges can help build capacity for stormwater through retention and detention. Additionally, redesign of stream or riverfront parks to allow for seasonal and cloudburst flooding can reduce downstream flooding in unwanted areas.

Cul-de-sacs can often be used where terrain, such as canyons, prevents further roadway development. These areas are natural locations for stormwater to flow from the roadway and into the canyon (and streambed below).

Floodable hardscapes and plazas present another great opportunity for large retention capacity within dense urban environments. Typically hardscape with some potential vegetation, these spaces collect, detain and retain stormwater to reduce flooding. They can incorporate drainage connections to allow the plaza, courtyard, and other spaces to return to normal use quickly.