Urban Water Infrastructure CE 572 Analysis of Urban

Urban Water Infrastructure CE 572 - Analysis of Urban Water Systems Larry A. Roesner, Ph. D. , P. E. Fall 2008

The Urban Water Infrastructure System Supply Treatment plant Distribution system Collection system Drainage system Reuse Treatment plant Disposal

The Water Supply Infrastructure System Supply Treatment plant Distribution system Collection system Drainage system Reuse Treatment plant Disposal

Water Supply Issues • Raw water -> Finished supply – Dependable supply now and tomorrow – Where, how much, quality, cost – Conservation • Distribution system – System expansion – Maintenance – Water quality at point of use – Security

The Wastewater Infrastructure System Supply Treatment plant Distribution system Collection system Drainage system Reuse Treatment plant Disposal

Wastewater Issues • Collection Systems – Planning for future growth – Maintenance of existing system – Untreated overflows (CSOs, SSOs) • Wastewater Treatment Plants – Effluent limits on discharges – Wet weather by-passing – Future growth

The Urban Runoff Infrastructure System Supply Treatment plant Distribution system Collection system Drainage system Reuse Treatment plant Disposal

Runoff Issues • Flood protection (local and downstream) • Discharge water quality • Maintenance – Drainage infrastructure – Water quality issues

But who’s thinking about the “water system” ? ? • Most municipalities have independent departments for water, wastewater, and stormwater • For some, collection/distribution systems is a separate department • Integrated management is difficult Green Infrastructure and Sustainable Communities 17 -9

The Pre-Urban Water Balance RAIN 40% Evapotranspiration Undeveloped INFILTRATION 50 % RUNOFF 10 % Green Infrastructure and Sustainable Communities 17 -10

Effect of Urban Development RAIN POTABLE WATER 35% Evapotranspiration Developed INFILTRATION 25 % RUNOFF 30 % WWTP SSOs/CSOs Green Infrastructure and Sustainable Communities 17 -11

Overview of Course • Readings • Applications lectures • Project report for each modeling exercise • Class presentations of project findings

Course Topics • Holistic analysis of an urban water system – Wastewater reuse – Graywater reuse – Xeriscaping vs. bluegrass • System infrastructure management issues • Water supply system analysis – Water age – Security • Sanitary sewer overflow problem – RDII – Analysis of alternatives for remediation • Combined sewer overflow problem • Stormwater quality and treatment

Meeting Time