Title page for ETD etd-11292002-102632


Type of Document Dissertation
Author Echols, Stuart Patton
Author's Email Address spechols@earthlink.net
URN etd-11292002-102632
Title Split-flow Stormwater Management Strategy Design Feasibility and Cost Comparison
Degree PhD
Department Environmental Design and Planning
Advisory Committee
Advisor Name Title
Johnson, Benjamin C. Committee Co-Chair
Miller, Patrick A. Committee Co-Chair
Bork, Dean R. Committee Member
Cox, William E. Committee Member
Ferguson, Bruce K. Committee Member
Keywords
  • Split-Flow
  • Stormwater Management
  • Ecological Restoration
Date of Defense 2002-10-11
Availability unrestricted
Abstract
This dissertation develops a new distributed split-flow stormwater management strategy and compares its site design feasibility and construction cost to existing stormwater management methods. The purpose of the split-flow strategy is to manage stormwater by preserving predevelopment flows in terms of rate, quality, frequency, duration and volume. This strategy emulates the predevelopment hydrology: it retains and infiltrates additional runoff volume created by development by using bioretention and paired weirs as proportional flow splitters connected to small infiltration facilities distributed throughout a site. Results show that 1) the distributed split-flow stormwater management strategy can provide a higher level of environmental protection at comparable construction cost to existing detention-based methods, 2) split-flow systems are less expensive to construct than current truncated hydrograph-based bioretention and infiltration systems and 3) non-point source water pollution-reduction objectives, currently achieved with either detention with first flush or comparable bioretention and infiltration systems, could be achieved in a more cost-effective manner using distributed split-flow stormwater management strategy.
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