D. Proposed ecological system existing park system & dense city fabric

Ecological and cultural system will extend from the eastern water- front towards the residential communities and existing parks on the hills of San Francisco. Increased urban densities throughout the city will make possible larger park systems in the future. Park cor- ridors with higher densities will be in juxtaposition to the downtown core. In response to rising tides this proposal is taking the oppor- tunity to reconfigure the relationship between urban development and ecological systems. Within this public realm cultural corridors link to existing urban fabric to help stimulate the local economy; together these systems combine as a ‘smart green grid’.

E. Diversifying the edge-combining economic, cultural and environ- mental systems for a sustainable future

A diverse accessible edge along San Francisco’s industrial water- front will be established. The intentions of this proposal is to recog- nize already planned mixed use development areas, existing port land and industrial areas. Proposed green infrastructure system will act as an intervention within the existing context, establishing a natural buffer for sea level rise and a diverse littorol zone along the edge of San Francisco. This ecological zone will also be a cultural habitat, with various programs and extensive public access to the eastern waterfront. The eastern edge of the city will be as livable as the western side.

F. Opportunity: proposed green infrastructure system

Proposed green infrastructure system is adaptable and flexible, adjusting with rising elevations and providing a natural buffer to ris- ing tides. Infrastructure system will migrate with sea level change, through ecological connectors that start with the tidal flats and marshlands, extending to grasslands and upland forest. A perme- able street system extends from the top of the hills to the existing waterfront collecting runoff and recharging groundwater to balance increase salinity in the bay due to sea level rise.