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DTSTART;TZID=America/New_York:20191112T160000
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DTSTAMP:20260405T003607
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UID:10000224-1573574400-1573574400@climatechange.umaine.edu
SUMMARY:MODELING RESPONSE OF WATER QUALITY TO LAND-USE AND CLIMATE CHANGE IN LAKE AUBURN\, MAINE   - Nick Messina - Thesis Defense Announcement
DESCRIPTION:Thesis Defense Announcement\nMODELING RESPONSE OF WATER QUALITY TO LAND-USE AND CLIMATE CHANGE IN LAKE AUBURN\, MAINE\nNick Messina\nTuesday\, November 12\, 2019 at 4 pm 307 Bryand Global Sciences Center\n\nAbstract\nLake Auburn\, Maine\, USA\, is a historically unproductive lake that has experienced multiple algal blooms since 2011. The lake is the water supply source for a population of ~60\,000. We modeled past temperature\, and concentrations of dissolved oxygen (DO) and phosphorus (P) in Lake Auburn by considering the watershed and internal contributions of P as well as atmospheric factors\, and predicted the change in lake water quality in response to future climate and land-use changes. A stream hydrology and P-loading model (SimplyP) was used to generate input from two major tributaries into a lake model (MyLake) to simulate physical mixing\, chemical dynamics\, and sediment geochemistry in Lake Auburn from 2013 to 2017. Simulations of future lake water quality were conducted using meteorological boundary conditions derived from recent historical data and climate model projections for high greenhouse-gas emission cases. The effect of future land development on lake water quality for the 2046 to 2055 time period under different land-use and climate change scenarios was also simulated. Our results indicate that lake P enrichment is more responsive to extreme storm events than increasing air temperatures\, mean precipitation\, or windstorms; loss of fish habitat is driven by windstorms\, and to a lesser extent an increasing water temperature; and watershed development further leads to water quality decline. All simulations also show that the lake is susceptible to both internal and external P loadings.
URL:https://climatechange.umaine.edu/event/modeling-response-of-water-quality-to-land-use-and-climate-change-in-lake-auburn-maine-nick-messina-thesis-defense-announcement/
LOCATION:Bryand Global Sciences Center – Room 307
CATEGORIES:Defense Announcement
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