Premium
Seasonal and longitudinal variations in apparent deposition rates within an Arkansas reservoir 1
Author(s) -
James William F.,
Kennedy Robert H.,
Montgomery Robert H.,
Nix Joe
Publication year - 1987
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.1987.32.5.1169
Subject(s) - hypolimnion , turbidity , deposition (geology) , dissolved organic carbon , environmental science , hydrology (agriculture) , water quality , sediment , chlorophyll a , oceanography , geology , ecology , eutrophication , nutrient , chemistry , geomorphology , biology , biochemistry , geotechnical engineering
Seasonal and spatial differences in apparent sediment trapping rates were related to the establishment of longitudinal gradients in water quality at DeGray Lake, Arkansas. Gradients in turbidity developed during winter and spring due to high suspended loads, which settled primarily in the headwater region. Gradients in apparent deposition of allochthonous organic carbon and chlorophyll a also influenced detrital processing and hypolimnetic dissolved oxygen conditions. Hypolimnetic dissolved oxygen depletion started in May in the headwater region, due to a high volumetric dissolved oxygen demand, and spread slowly to the dam by winter. These patterns indicated that riverine inputs and deposition influenced biological activity along the longitudinal axis of the lake.