COMPARATIVE STUDIES ON MICROBIOLOGICAL AND CHEMICAL CHARACTERISTICS OF HIGH DAM LAKE WITHEN TEN YEARS.

COMPARATIVE STUDIES ON MICROBIOLOGICAL AND CHEMICAL

CHARACTERISTICS OF HIGH DAM LAKE WITHEN TEN YEARS.

ABDEL SAMIE ELEWA* AND MOHAMED AZAZY**

*Institute of Oceanography and Fisheries, Cairo, Egypt.

**Soil and Water Use Lab., National Research Centre, Cairo, Egypt.

ABSTRACT
High Dam Lake is a tropical eutrophic empoundment in
upper Egypt. The Late drought period led to a pronouced
changes in chemical and microbioloical characteristics of
the reservoi r.
The physical and chemical changes as affected by droug~t
are described. Total bacterial counts at both 22 and 37 C
increased mainly in Sunmer and Autumn. On the other hand,
counts of asymbiotic nitrogen fixers decreased.