UA LID / Surface Water Projects

The Paradigm - Water is a Problem, not a Resource

A shift….

Student led rain water harvesting project – AME Building, UA Campus

Highland Parking Garage Multi-purpose Basin / Open Space

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Water Harvesting Micro-basins

Helen Street

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Looking West after a monsoon

Highland Parking Garage Multi-purpose Basin / Open Space and Water Harvesting Micro-basins

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Rain collects in landscaped low end of basin – allows lawn to dry sooner. Area includes large french drain. 4

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Rain bubbles onto lawn, percolating and watering lawn as it runs toward low point on the west. 3

1 Rain captured on roof directed to drains

2 Roof runoff directed via pipe to bubbler in lawn (red dot)

5 Overflow pipe for depths greater than 2’-3’

Flows

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West

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= Water harvesting micro-basin.

Prerequisite to creating 100 bathtub sized catchments – create many smaller outlets

UA Visitor Center Landscape Renovation

Lynch Pavilion Water Harvesting Terraces

University Blvd.

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Lynch Pavilion Water Harvesting Terraces

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1 Water collects from roofs and plaza into drain pipes

2 Water bubbles up (red dots) into landscape terrace

3 Water cascades between terraces through weirs, eventually spilling to lawn

Design Intent

[SF, volume]

[SF, volume]

[SF, volume]

Status: Experimenting with bubblers to get water to surface. An existing outlet pipe to a

storm sewer at the bottom of the bubblers prevents water from reaching the surface. East

West

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Urban Response – Surface Structures

Urban Response – Surface Structures

Permeable surface….Impermeable sub-surface?

Urban Response – Surface and Subsurface Structures

Structural Soil

Urban Response – Surface and Subsurface Structures

Bear Down Field Tank

3. 3 Acre Feet

Sixth Street Residence Halls(currently under construction)

Rain water from roof directed into landscape basinsWater ponding in basins balanced/metered via connected inlets/outlets

Overflow for large events

Detention bleed-off from Bear Down tank into infiltration chambers

Infiltration chambers overflow into perforated pipes buried beneath landscape

Overflow from infiltration tanks, if system becomes fully charged in large events, into basin

Final overflow to street

Student Rec Addition

Speedway Boulevard

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ExpansionWater Garden

CALA ExpansionWater Garden

Urban Response – Surface and Subsurface Structures - Tanks

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Watershed – CALA building addition roof runoff & AC condensate directed to cisternCistern (blue circle) integrated into 3-story building. Overflows via scupper into pond. Water is used to irrigate landscape using pump.

Pond – fed by cistern, surface collection. Re-circulates through scupper

Flows

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Architecture Building Water GardenArchitecture Building Water Garden

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Urban Response – Surface and Subsurface Structures - Tanks