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Advective control of nutrient dynamics in the epilimnion of a large reservoir 1
Author(s) -
Gloss Steven P.,
Mayer Lawrence M.,
Kidd David E.
Publication year - 1980
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1980.25.2.0219
Subject(s) - epilimnion , nutrient , phytoplankton , environmental science , turbidity , productivity , advection , hydrology (agriculture) , spring (device) , nitrate , phosphorus , surface runoff , oceanography , ecology , geology , eutrophication , chemistry , biology , hypolimnion , mechanical engineering , physics , geotechnical engineering , macroeconomics , organic chemistry , engineering , economics , thermodynamics
Silica, nitrate, total and dissolved phosphorus, and conductivity were measured during spring and summer in Lake Powell, Utah‐Arizona. Phytoplankton productivity was also determined. Conductivity is used as a tracer for delineating the advective influence of inflows from the Colorado and San Juan Rivers on nutrient delivery and distribution in the reservoir. High spring runoff (1,000–2,000 m 3 ·s −1 ) enters the lake essentially as an overflow and dominates the nutrient cycle in the epilimnion. The interaction of advective nutrient delivery and high turbidity controls the distribution of phytoplankton productivity and nutrient depletion.