Assessment of optimum aquatic microcosm design for pollution-impact studies. Final report

Technical Report · Mon Sep 01 00:00:00 EDT 1980

OSTI ID:6153295

Harte, J; Levy, D; Rees, J; Saegebarth, E

A series of experiments was carried out to determine and evaluate optimum design and operating conditions for pelagic lake microcosms (microcosm assessment studies) and to explore a possible use of such systems for toxicological testing (decomposition studies). Criteria selected for microcosm optimization were realism (tracking by the microcosms of the real lake used to stock the microcosms) and replicability of identically-initiated microcosms. In the assessment studies, a number of different pelagic microcosm configurations were studied, including the size of the microcosm containers (from 4 liters to 200 liters), the method of algal surface-growth prevention, and the degree of water mixing and aeration. In addition, the microcosm-lake comparisons were carried out at various seasons of the year, allowing us to determine the influence of natural seasonal factors on the chemical and biological differences between the lakes and the microcosms.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6153295
• Report Number(s): LBL-11411; ON: DE81028547
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
LAKES
ECOSYSTEMS
TOXICITY
BIOLOGICAL INDICATORS
WATER POLLUTION CONTROL
ALGAE
BIODEGRADATION
EQUATIONS
MIXING
SEASONAL VARIATIONS
WATER
CHEMICAL REACTIONS
CONTROL
DECOMPOSITION
HYDROGEN COMPOUNDS
OXYGEN COMPOUNDS
PLANTS
POLLUTION CONTROL
SURFACE WATERS
VARIATIONS
520200* - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)