Author: Hanson David
Publisher: Taylor & Francis Ltd
ISSN: 1040-2381
Source: Lake and Reservoir Management, Vol.28, Iss.2, 2012-06, pp. : 107-119
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Abstract
Hanson D, Austin D. 2012. Multiyear destratification study of an urban, temperate climate, eutrophic lake. Lake Reserv Manage. 28: 107-119. An aeration system for destratification has been in operation since 1973 at Sweeney Lake, an urban, eutrophic lake near Minneapolis, Minnesota, USA. Water quality data are available for 19 of the 39 years, 1972–2010. Growing season (Apr–Oct) aeration was turned off in 2007–2008 to evaluate the effect of destratification on water quality. Aeration never achieved the Lorenzen and Fast (LF) complete destratification airflow criterion of 9.2 m3/min/km2. When aeration was at 51% LF, hypoxia (DO < 2.0="" mg/l)="" occurred="" june–august="" at="" the="" lake="" bottom.="" when="" airflow="" increased="" to="" 65%="" lf,="" bottom="" water="" hypoxia="" was="" restricted="" to="" 4="" weeks="" in="" late="" july–august.="" there="" were="" no="" systematically="" significant="" differences="">
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