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INTEGRATION OF WATER HARVESTING INTEGRATION OF WATER HARVESTING AND GI/LID IN THE AND GI/LID IN THE
CITY OF TUCSON AND PIMA COUNTYCITY OF TUCSON AND PIMA COUNTYFebruary 1, 2012
PSOMAS, Tucson, AZ
Irene Ogata, RLA, CPMUrban Landscape ManagerOffice of Conservation &
Sustainable Development
Evan Canfield, Ph.D, P.E.Chief HydrologistPima County Regional
Flood Control
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Outline: The Joint Effort
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Encourage Integrated Use ofStormwater
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Recharge vs CaptureRecharge - Infiltrate to
the regional aquifer for future use.
Capture – store for use in the near term.
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‘Harvestable’ Water (Rainwater/Stormwater) i.e. water yield
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Low Impact Development andGreen Infrastructure
EPA Green Infrastructure Homepage - Glossary
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Low Impact Development (LID)Mimic pre-development hydrology
Source: Low Impact Development Center
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Next Steps:CITY-COUNTY WATER-WASTEWATER
INFRASTRUCTURE & PLANNING STUDY
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Pima County:DETENTIONDETENTION––RETENTION MANUAL RETENTION MANUAL
(Draft)(Draft)
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85th Percentile Rainfall 0.48 inch
Replace Retention Requirement with a‘First Flush’ Retention Requirement
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Pima County:DECENTRALIZED DECENTRALIZED ‘‘FIRST FLUSHFIRST FLUSH’’ RETENTIONRETENTION
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Neighborhood-Scale Water Harvesting Manual
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City of Tucson
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City of TucsonApproved: Curb cut standards
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City of TucsonOrdinanced: Commercial Rainwater Harvesting
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Case Studies CatalogueSmall Scale: Neighborhood - scale
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Case Studies CatalogueHighland Vista Park: Collector street – residential land useNative vegetation irrigated with harvested stormwater
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Case Studies CatalogueRincon Heights: Residential collector
Photo: Watershed Management Group (WMG)
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Case StudiesWard 3: Municipal Facility – onsite capture
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Case StudiesScott Avenue: Collector street - commercial land uses
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Case StudiesCamino Campestre: Collector Street – residential/park land use
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So?
•March 2012: Regional LID Conference•Mid-2012: Draft Neighborhood Scale Water Harvesting Manual (public review by end of 2012)
•Mid- 2012: Pima County Dentention/Retention Manual for public review
•Late 2012: Draft Case Study Catalogue
CurrentCurrent Project Project TimelineTimeline::
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Resources
City-County Water Study White Paper on Stormwaterhttp://www.tucsonpimawaterstudy.com
/Reports/Phase2/Stormwater.Mgt.Tech.Paper.pdf
City of Tucson Water Harvesting Ordinancehttp://www.tucsonaz.gov/ocsd/sustainability/water/rain
waterharvesting.php
Notes on Tucson LID Workshophttp://rfcd.pima.gov/pdd/lid/
AridLIDhttp://www.aridlid.org/
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Questions
Evan Canfield: Evan Canfield: [email protected] Ogata: Irene Ogata: [email protected]
