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City Water: Redefining Responsible Stormwater Management in the Urban Environment By Sarah Marshall


“A bad solution is bad, then, because it acts destructively upon the larger patterns in which it is contained. It acts destructively upon those patterns, most likely, because it is formed in ignorance or disregard of them. A bad solution solves for a single purpose or goal, such as increased production. And it is typical of such solutions that they achieve stupendous increases in production at exorbitant biological and social costs.� Wendell Berry, Solving for Pattern


Overflows


Park + Tree Cover


Buildings: ~50%


Roads: 25%


Paved (Impervious) Area ~50%


Thesis Proposal: The Seattle Central Waterfront has the potential to lay the foundation for improved water quality in the Puge Sound. The viaduct must be removed, and the seawall must be replaced. With all of this new development, it is essential that we embrace the possibility of new approaches to water use and treatment, and lay the groundwork for building on those systems now. The next big opportunity for change may not present itself for another 70 years. The Central Waterfront serves as the most visible and public boundary between land and water in Seattle. By creating a new approach to water management here, it will serve as an impetus to improving our urban waterways.


Stormwater Systems


Bathing Facilities


Constructed Wetland: Houtan Park, Shanghai Expo: • treats 500,000 gallons/day • 1 mile long, 30-100 ft wide


Seawall Systems


Diverse

Clean Stormwater: Roof Runoff

Dirty Stormwater: Road Runoff

Blackwater: Sewage


Resilient


Incremental


Incremental


Incremental


Incremental


Public Ownership


Three Strategies


Wetland


Wetland


Wetland


Pier 48 Bathing Facility


Habitat Creation


Seawall Replacement Options


History


‘Strolling, sitting and viewing’ ’Touch the water’


Users

Scuba divers

Commuters

Small craft boaters

Tourists

Families Transient Population Swimmers


Program (Unconditioned) • storage lockers for equipment • showers (400ft ) 2

• changing rooms (800 ft ) 2

• wading/intertidal exploration zone • outdoor seating/sunbathing • deep water swimming zone • diving zone

Program (Conditioned) • 4 saunas (120 ft2 each) • administration office/reception area (500 ft ) 2

• kitchenette (200ft ) 2

• flexible program space that can accomodate group activities, camps, etc... (1000 ft2)


Thesis Presentation