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DatoValore
TitleUSING IMPELLERS TO DISTRIBUTE LOCAL NUTRIENT LOADINGS IN A STRATIFIED LAKE: LAKE COMO, ITALY
AbstractThe feasibility of using a vertically downward pointing impeller to remove polluted water from a coastal margin was investigated with a pilot experiment in Lake Como, Italy. The vertical jet induced by the impeller entrained surface water downward to depth, where upon reaching neutral buoyancy it intruded horizontally into the lake proper. A three-dimensional numerical hydrodynamic model was validated with results from an intensive eight-day field study during which rhodamine WT dye was introduced in the lee of the impeller and then tracked as it was transported into the lake. One of the major sources of pollution to the lake is the Cosia River underflow that drains a catchment adjacent to the City of Como. The numerical model, once validated, was used to show that six impellers, with the correct thrust, could be used to reduce the pollutants adjacent to the City of Como by half within two weeks; this was achieved by injecting the surface water to a depth that would intensify the Cosia River intrusion.
SourceJournal of hydraulic engineering (N. Y. N. Y.) 135 (7), pp. 564–574
KeywordsLakesHeterogeneityResidence timeFlushingNutrient loads
JournalJournal of hydraulic engineering (N. Y. N. Y.)
EditorAmerican Society of Civil Engineers,, [New York, NY], Stati Uniti d'America
Year2009
TypeArticolo in rivista
DOI10.1061/(ASCE)HY.1943-7900.0000048
AuthorsMORILLO S., IMBERGER J., ANTENUCCI J., COPETTI D.
Text42313 2009 10.1061/ ASCE HY.1943 7900.0000048 ISI Web of Science WOS 000267054500003 Scopus 2 s2.0 67649225380 Lakes Heterogeneity Residence time Flushing Nutrient loads USING IMPELLERS TO DISTRIBUTE LOCAL NUTRIENT LOADINGS IN A STRATIFIED LAKE LAKE COMO, ITALY MORILLO S., IMBERGER J., ANTENUCCI J., COPETTI D. MORILLO S., IMBERGER J., ANTENUCCI J. Centre for Water Research, the University of Western Australia, Crawley, Western Australia, Australia COPETTI, D. Consiglio Nazionale delle Ricerche Istituto di Ricerca Sulle Acque U.O.S. Brugherio The feasibility of using a vertically downward pointing impeller to remove polluted water from a coastal margin was investigated with a pilot experiment in Lake Como, Italy. The vertical jet induced by the impeller entrained surface water downward to depth, where upon reaching neutral buoyancy it intruded horizontally into the lake proper. A three dimensional numerical hydrodynamic model was validated with results from an intensive eight day field study during which rhodamine WT dye was introduced in the lee of the impeller and then tracked as it was transported into the lake. One of the major sources of pollution to the lake is the Cosia River underflow that drains a catchment adjacent to the City of Como. The numerical model, once validated, was used to show that six impellers, with the correct thrust, could be used to reduce the pollutants adjacent to the City of Como by half within two weeks; this was achieved by injecting the surface water to a depth that would intensify the Cosia River intrusion. 135 http //ascelibrary.org/hyo/resource/1/jhend8/v135/i7/p564_s1 isAuthorized=no Articolo pubblicato Morillo_et_al_2009_Journal_Hydraulic_Engineering_ASCE.pdf Articolo in rivista American Society of Civil Engineers, 0733 9429 Journal of hydraulic engineering N. Y. N. Y. Journal of hydraulic engineering N. Y. N. Y. J. hydraul. eng. N. Y. N. Y. Journal of hydraulic engineering. N. Y. N. Y. Hydraulic engineering N. Y. N. Y. A.S.C.E. hydraulic engineering N. Y. N. Y. ASCE hydraulic engineering N. Y. N. Y. ASCE journal of hydraulic engineering N. Y. N. Y. diego.copetti COPETTI DIEGO TA.P02.014.001 Alterazioni ecosistemiche a livello funzionale e strutturale indotte da cambiamenti globali