Premium
Field and Laboratory Studies on Some Photosynthetic Bacteria in Aswan High Dam Lake I. Some Physical and Chemical Characteristics
Author(s) -
Shoreit A. A. M.,
Ahmed A. M.,
Shabeb M. S. A.
Publication year - 1989
Publication title -
internationale revue der gesamten hydrobiologie und hydrographie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 0020-9309
DOI - 10.1002/iroh.19890740404
Subject(s) - potassium , sodium , chlorophyll a , environmental chemistry , spring (device) , mineralogy , magnesium , chemistry , environmental science , hydrology (agriculture) , geology , mechanical engineering , biochemistry , geotechnical engineering , organic chemistry , engineering
Seasonal variations in some physical and chemical characteristics of samples collected from summer 1984 to spring 1985 and vertically from the surface to the bottom at two sites along the main body of Aswan High Dam Lake and in two side Khors were studied. Water temperature showed seasonal as well as vertical variations. The pH values were in the vicinity of 8.0. Dissolved oxygen concentrations were higher at the surface than at the bottom. The total dissolved solids showed seasonal as well as irregular vertical variations. Bicarbonates, nitrates, and silicates showed a marked increase with depth, while sodium, potassium, calcium and magnesium showed generally a slight or, sometimes, marked increase with depth. Phosphates and sulfates showed a slight or marked decrease with depth. Chlorophyll a decreased with depth while bacteriochlorophyll a increased.