implementing a sustainable stormwater management program in an urban center – baltimore, maryland
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Implementing a Sustainable Stormwater Management Program in an Urban Center – Baltimore, Maryland. Catherine J. DiBlasi Dr. Neely Law, Dr. Upal Ghosh University of Maryland, Baltimore County Civil & Environmental Engineering. Chesapeake Bay. Chesapeake Bay Watershed 166,000 km 2. - PowerPoint PPT PresentationTRANSCRIPT
Implementing a Sustainable Stormwater Management Program in an Urban
Center – Baltimore, Maryland
Catherine J. DiBlasiDr. Neely Law, Dr. Upal Ghosh
University of Maryland, Baltimore CountyCivil & Environmental Engineering
Chesapeake Bay
• Eutrophication – Due to excess nutrient loading
Photos: www.whrc.org, www.chesapeakebay.net
Chesapeake Bay Watershed 166,000 km2
Agriculture
Urban landscape
Wastewater treatment plants
Urban Stormwater : 16 % of Phosphorous11 % of Nitrogen9 % of Sediment Loads to Chesapeake Bay(CBP 2006)
Baltimore, MD – Watershed 263
Impervious Cover = 75 %
• 376 hectares• No flowing surface waters• Dry weather baseflow
WS 263
Figures: Parks & People, Center for Watershed Protection
A Holistic Approach to Urban Stormwater Management
• Address all sources and underlying causes• Community outreach • Improve water quality
and quality of life
Photos: G. Hagar, Parks & People Foundation
Outfall 2637.6 m diameter
Creating a community garden in a vacant lot.
Community Involvement• Creative Partnerships
• Projects Schoolyard Greening Clean & Green
An example of a schoolyard greening project.
Photos: Parks & People Foundation
Street Sweeping and Storm Drain Cleanouts
Street Sweeping Storm Drain Cleanout
• Limited Space• Limited Money
Photos: Baltimore City DPW, Center for Watershed Protection
Figure: www.cwp.org
Paired Watershed Study
Catchment F
Catchment O
Water quality monitoring station
85 % dec. curb-km swept/week
48 % inc. curb-km swept/week + storm drain cleanout
WS 263 Field Monitoring
Photos: U. Ghosh, K. Belt
Water Quality MonitoringStreet Particulate Sampling
Event Mean Concentration (EMC) = mass/volume
Total Nitrogen
Median Total Nitrogen Values for Baseline Sampling Period (Sept 2004 - Dec 2005)
3.6 3.5
6.3
2.42.0
0
1
2
3
4
5
6
7
BaltimoreBaseflow (O)
LanvaleBaseflow (F)
BaltimoreStorm (O)
LanvaleStorm (F)
NationalStorm
Median EMC
To
tal N
itro
ge
n (
mg
/L)
(TK
N +
NO
2 +
NO
3)
Sources: Baltimore City Department of Public Works – Water Quality Management Section (2006), Pitt et al. (2004).
n = 20-24
Fecal Coliform Count
Fecal Coliform Count (Most Probable Number/100 ml)-Baseline Period
900 4000 5081
30000
90000
0
20000
40000
60000
80000
100000
BaltimoreBaseflow
(O)
LanvaleBaseflow
(F)
BaltimoreStorm (O)
LanvaleStorm (F)
NationalStorm
MedianEMC
Fe
ca
l Co
lifo
rm C
ou
nt
(MP
N/1
00
ml)
Sources: Baltimore City Department of Public Works – Water Quality Management Section (2006), Pitt et al. (2004).
n = 20-24
Public Health Risk
Photos: U. Ghosh
Lead - Dissolved and Total
Median Lead (ug/L) - Dissolved and TotalDuring Baseline Period
0102030405060
BaltimoreBaseflow
(O)
LanvaleBaseflow
(F)
BaltimoreStorm (O)
LanvaleStorm (F)
NationalStorm
MedianEMC
Le
ad
(u
g/L
) Total Pb
Dissolved Pb
Sources: Baltimore City Department of Public Works – Water Quality Management Section (2006), Pitt et al. (2004).
n = 20-24
Ongoing Work
• Risk assessment on particulate matter
• Installation of > 100 innovative stormwater practices
• Quality of life assessment
Conclusions
• Need alternative approaches to nutrient reduction.
• Health of the Bay depends on the cumulative benefit of all community-based watershed programs.
• Community involvement and creative partnerships essential, WS 263 an excellent example.
Thank You
Neely Law, CWP Project ManagerDr. Upal Ghosh, UMBC
Civil & Environmental Engineering
Baseline Water Quality Data
Parameter UnitsLanvale
Baseflow1
BaltimoreBaseflow1
Lanvale Storm1
Baltimore Storm1
National Storm EMC2
TP mg/L 0.11 0.46 0.3 0.37 0.27TN (TKN + NO2 + NO3) mg/L 3.6 6.3 2.4 3.5 2
TSS mg/L 25 3.2 52 52 58
Fecal Coliform Count
MPN/ 100 ml 4000 900 30000 90000 5081
Total Pb (diss. + part.) (μg/L) 7.9 2.8 46 44 16
Pb dissolved (μg/L) 1 2 2.5 3.5 N/A
Sources: 1Baltimore City Department of Public Works – Water Quality Management Section (2006), 2Pitt et al. (2004).
Median Values for Select Parameters