Browsing by Author "Mayer, Paul"
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Item Harford County Bel Air Bicycle Network Study(Partnership for Action Learning in Sustainability (PALS), 2018) Danies, Blair; Dibra, Jenny; Foss, Garrett; Jaiye, Akin; Kim, Michael; Mayer, Paul; Palomino, Steven; Saernwald, Sara; Schwartz, James; Shepherd, Akira; Snyder, Christopher; Tran, Cecilia; Whiteley, Sarah; Zhou, Qi; Wolfe, WilliamIn 2013, Harford County adopted a Bicycle and Pedestrian Master Plan that establishes goals and priorities for improving the County’s bicycle and pedestrian networks and connecting to key destinations throughout the County. In 2018, Harford County engaged with the Bachelor of Landscape Architecture Capstone Studio at the University of Maryland to develop a more comprehensive plan that would include an overall strategy and suite of best practices to guide the development, implementation and expansion of the County’s bicycle network. During the studio’s first phase, students reviewed the existing plan, supporting materials, precedents of bicycle trails and Complete Streets policies, and met with planning officials to evaluate information gaps and missing links and to provide recommendations for developing links. Working in design teams, students addressed the priority connections between the County and the Town of Bel Air. The teams also identified potential connections to or expansions of the green infrastructure network and opportunities for recreational tourism. During the studio’s second phase, students undertook a more detailed analysis of the Town of Bel Air’s 2013 Bicycle and Pedestrian Plan to advance the proposed segments that connect to the County’s Plan. County-identified priorities include Macphail Road, MD Route 24, and the connection between downtown Bel Air and Harford Community College. The teams field verified the concepts for proposed routes. Standards for trail designs and markers were developed and marker locations were identified.Item Master Plan for the Arlington Echo Campsite(Partnership for Action Learning in Sustainability (PALS), 2017) Hartmann, Ben; Hernandez, Beverly; Berger, Max; Vitale, Simone; Whiteley, Sarah; Danies, Blair; Dibra, Jenny; Hare, Devan; Saernwald, Sara; Shepherd, Akira; Tran, Cecilia; Kim, Dong Hyun; Jaiye, Akin; Foss, Garrett; Zhou, Qi; Palomino, Steven; Snyder, Christopher; Schwartz, James; Quinn, Sean; Mayer, Paul; Ellis, ChristopherItem Phosphorus Retention in Stormwater Control Structures across Streamflow in Urban and Suburban Watersheds(MDPI, 2016-09-09) Duan, Shuiwang; Newcomer-Johnson, Tamara; Mayer, Paul; Kaushal, SujayRecent studies have shown that stormwater control measures (SCMs) are less effective at retaining phosphorus (P) than nitrogen. We compared P retention between two urban/suburban SCMs and their adjacent free-flowing stream reaches at the Baltimore Long-Term Ecological Study (LTER) site, and examined changes in P retention in SCMs across flow conditions. Results show that, when compared with free-flowing stream reaches, the SCMs had significantly lower dissolved oxygen (%DO) and higher P concentrations, as well as lower mean areal retention rates and retention efficiencies of particulate P (PP). In all the SCMs, concentrations of total dissolved phosphorus (TDP) consistently exhibited inverse correlations with %DO that was lower during summer base flows. Particulate phosphorus (PP) concentrations peaked during spring high flow period in both streams and in-line pond/SCMs, but they were also higher during summer base flows in suburban/urban SCMs. Meanwhile, PP areal retention rates and retention efficiencies of the SCMs changed from positive (indicating retention) during high flows to negative (indicating release) during low flows, while such changes across flow were not observed in free-flowing stream reaches. We attribute the changing roles of SCMs from a PP sink to a PP source to changes in SCM hydrologic mass balances, physical sedimentation and biogeochemical mobilization across flows. This study demonstrates that in suburban/urban SCMs, P retained during high flow events can be released during low flows. Cultivation of macrophytes and/or frequent sediment dredging may provide potential solutions to retaining both P and nitrogen in urban SCMs.