Browsing by Author "Taguchi, Vinicius"
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Item Detecting phosphorus release from stormwater ponds to guide management and design(2021-02-23) Finlay, Jacques C; Gulliver, John S; Janke, Benjamin D; Natarajan, Poornima; Taguchi, Vinicius; Shrestha, Paliza; janke024@umn.edu; Janke, Ben D; University of Minnesota - St. Anthony Falls Laboratory - Stormwater Research GroupThere is growing concern that aging stormwater retention ponds may become net sources of phosphorus (P) to receiving waters. Release of P previously deposited in sediments (i.e. internal loading) is a major contributor to eutrophication in lakes. Stormwater ponds often have high external P loading, and other characteristics that may increase the likelihood of internal loading as ponds age. However, stormwater ponds have received comparatively little research attention, even though they are widely used with the intended goal of permanent immobilization of phosphorus. The ability of these systems to retain phosphorus over their lifespan is essentially unknown. The proposed research will build understanding necessary to assess the capacity of stormwater ponds to retain or release phosphorus in Minnesota’s stormwater pond infrastructure. The projects aim to develop methods for rapid and efficient identification of pond phosphorus release, to guide management of existing ponds, and to reveal factors that underlie poor performance for P removal. The results of this project will be used to inform and improve pond maintenance, pond design and decision making around construction of new ponds, and to ultimately improve the water quality of our lakes, rivers and wetlands.Item The Draw: Algal Removal Feasibility Study(Resilient Communities Project (RCP), University of Minnesota, 2017) Christenson, Mark; Lokke, Ann; Rickbeil, Darrin; Taguchi, Vinicius; Weis, RenaThis project was completed as part of the 2017-2018 Resilient Communities Project (rcp.umn.edu) partnership with the City of Ramsey. With more high-intensity storms and above average precipitation amounts predicted for the region in the coming decades, storm water management will become a more significant issue in developing communities like Ramsey. The Draw is a 2.8-million-gallon retention and irrigation pond that serves an aesthetic function in the community and is a popular fishing spot for residents. Despite filtration, the pond is being overtaken by filamentous algae, which impacts the aesthetic appeal of the water feature and reduces the overwintering fish population. Students in Dr. John Gulliver’s Urban Hydrology and Water Quality class explored methods for reducing filamentous algae and improving overall water quality in The Draw. The students’ final report, presentation, and flyer are available.