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

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

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

4. 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

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

6. Wastewater Issues Collection Systems Wastewater Treatment Plants
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

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

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

9. 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

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

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

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

13. 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

14. Meeting Time