Challenges in Green Infrastructure Design and Associated Failure Modes, or how to get the most out of planned stormwater controls. Robert Pitt, Ph.D., P.E., D.WRE, BCEE Department of Civil, Construction, and Environmental Engineering University of Alabama Tuscaloosa, AL, USA 35487. - PowerPoint PPT Presentation
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SLAMM Workshop Rochester, NY August 15 and 16, 2001 3) Controls
for Stormwater
Challenges in Green Infrastructure Design and Associated Failure
Modes, or how to get the most out of planned stormwater
controlsRobert Pitt, Ph.D., P.E., D.WRE, BCEEDepartment of Civil,
Construction, and Environmental EngineeringUniversity of
AlabamaTuscaloosa, AL, USA 35487
1Dozen Issues of ConcernPoor
AssumptionsCloggingCompactionChemical BreakthroughSodium Adsorption
RatioImproper Sizing and LocationsGroundwater Interactions
Improper ConstructionPoor MaintenanceAnaerobic ConditionsLarge
Underdrains and Short-CircuitingNeed Combinations of Controls and
Unit Processes1) Real Data May Not Support Traditional Urban
Hydrology Assumptions Many agencies and stormwater managers focus
on single design storms that do not adequately represent the
long-term discharges of water and pollutants during wet
weatherLegacy of drainage design approachesSeattle Rains:
