Environmental and water-quality operational studies. Initial evaluation of a computer algorithm for simulating anaerobic conditions in reservoirs and lakes. Final report

Technical Report · Sat Feb 01 04:00:00 EST 1986

OSTI ID:5498558

Zimmerman, Marc J

A series of computer algorithms were developed to predict the concentrations of dissolved metals and nutrients in proposed and existing reservoirs. The algorithms, in the format of 13 subroutines, are incorporated in CE-QUAL-R1, the Corps of Engineers one-dimensional, numerical model of reservoir water quality. This evaluation documents procedures used early in the development and testing of the algorithms and has since led to modifications which have already improved CE-QUAL-R1 simulations in other applications. Field data derived from studies of DeGray Lake, Ark., provide the basis for calibrating and evaluating the algorithms. New model features specifically related to the simulation of anaerobic water-quality conditions include a simplified approach to initiate anaerobic processes, and simultaneous release from sediments of reduced materials and dissolved phosphorus. Oxidation and reduction processes in the water column are subject to the same constraints as those affecting sediment release. Two years of data from field studies, 1979 and 1980, were used to calibrate and evaluate simulations. In calibrating the model for assessing the new algorithms, sediment release rates were found to affect predictions most significantly. Although there were some discrepancies between observed and predicted conditions, trends and peak concentrations generally matched well. Further studies and applications of the model should help to assess its value as a tool in reservoir water quality management.

• Research Organization: Army Engineer Waterways Experiment Station, Vicksburg, MS (USA). Environmental Lab.
• OSTI ID: 5498558
• Report Number(s): AD-A-168000/8/XAB
• Country of Publication: United States
• Language: English

Related Subjects

520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ALGORITHMS
CHEMICAL REACTIONS
COMPUTERIZED SIMULATION
ELEMENTS
ENVIRONMENTAL QUALITY
LAKES
MANAGEMENT
MATERIALS
MATHEMATICAL LOGIC
MATHEMATICAL MODELS
NONMETALS
NUTRIENTS
OXIDATION
PHOSPHORUS
REDUCTION
RESOURCE MANAGEMENT
SEDIMENTS
SIMULATION
SURFACE WATERS
WATER QUALITY
WATER RESERVOIRS