M. Juanico, LIMNOLOGY OF A WARM HYPERTROPHIC WASTE-WATER RESERVOIR IN ISRAEL .2. CHANGES IN WATER-QUALITY, Internationale Revue der gesamten Hydrobiologie, 80(3), 1995, pp. 415-428
Factor analysis was used to identify the processes responsible for the
changes in water quality in a stratified wastewater reservoir. These
reservoirs are well suited to study hypertrophic conditions. In the ep
ilimnion, the main source of variablility was the external loading due
to variations in wastewater inputs and water level (volume) of the re
servoir. The second source was the seasonal climatic changes affecting
photosynthesis. The third source was differences between night and da
y processes affecting REDOX potential. In the hypolimnion, the main so
urce of variability was organic loading but due to both external loadi
ng (wastewater inputs) and internal loading (compounds released from t
he sediments). The second source was related to the input of chrorophy
ll into the hypolimnion, which were external (entry of chlorophyll ric
h inflow from a waste stabilization pond) and/or internal (input of ch
lorophyll from upper layers due to water column mixing).