Title page for ETD etd-294420559741551

Type of Document Master's Thesis
Author Hodges, Kimberly Jean
Author's Email Address hodgesk@andassoc.com
URN etd-294420559741551
Title Assessing Urban Non-Point Source pollutants at the Virginia Tech Extended Dry Detention Pond
Degree Master of Science
Department Civil Engineering
Advisory Committee
Advisor Name Title
Loganathan, G. V.
Mostaghimi, Saied
Kibler, David F. Committee Chair
  • non-point
  • pollution
  • stormwater
  • detention
  • quality
Date of Defense 1997-05-23
Availability unrestricted

With a growing concern for the

environment and increasing

urbanization of rural areas,

understanding the characteristics of

urban non-point source pollution has

become a focus for water quality

investigators. Once thought to be a

small contributor to the pollution

problem, urban non-point sources

are now responsible for transporting

over 50% of all pollutants into

natural waterways. Assessing

non-point source pollution is the key

to future water quality improvements

in natural receiving waters. The

purpose of this research was to

investigate the water quality of an

urbanized watershed, analyze

current prediction methods and to

investigate the effectiveness of an

extended dry detention basin as a

pollutant removal management

practice on a 21.68-acre urban

watershed on the Virginia Tech

Campus. This research included

extensive stormwater monitoring and

sampling to characterize the runoff

and water quality from an urban

watershed. The resulting analysis

included comparing well-known

desktop prediction methods with

pollutant removal rates using an

extended dry detention basin and

comparison with different literature

values. Finally, the study team

calibrated the PSRM-QUAL model

for watershed prediction of

non-point source runoff and

pollution. The results of the

stormwater monitoring process

show that water quality prediction

methods are not very successful on

a storm by storm basis, but can be

fairly accurate over longer periods

of time with little or no storm water

quality sampling. The extended dry

detention basin is a simple yet

effective management practice for

the removal of sediments and

sediment bound pollutants.

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