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Hamby, D. M. – Environmental Monitoring and Assessment, 1994
Mathematical models are utilized to approximate various highly complex environmental phenomena. Model parameters exerting the most influence on model results are identified through a "sensitivity analysis." A comprehensive review is presented of more than a dozen sensitivity analysis methods. (LZ)
Descriptors: Environmental Education, Environmental Influences, Environmental Research, Models
Peer reviewed Peer reviewed
Schreuder, H. T. – Environmental Monitoring and Assessment, 1994
Simplicity and efficiency in design and estimation are all important in deciding on sampling strategies. A simple model is given and illustrated for four practical situations to show how a good sampling strategy should be selected. (Author)
Descriptors: Efficiency, Environmental Education, Environmental Research, Estimation (Mathematics)
Peer reviewed Peer reviewed
Davis, Gary E. – Environmental Monitoring and Assessment, 1993
Describes methods of designing natural resource monitoring programs to provide indications of ecosystem health, define limits of normal variation, identify abnormal conditions, and suggest potential agent of abnormal change. (MDH)
Descriptors: Ecology, Environmental Education, Environmental Research, Evaluation Methods
Peer reviewed Peer reviewed
Hudak, Paul F. – Environmental Monitoring and Assessment, 1993
In the direction-dependent approach to location modeling developed herein, the distance within which a point of demand can find service from a facility depends on direction of measurement. The utility of the approach is illustrated through an application to groundwater remediation. (Author/MDH)
Descriptors: Environmental Education, Environmental Research, Groundwater, Higher Education
Peer reviewed Peer reviewed
Gochfeld, Michael; Burger, Joanna – Environmental Monitoring and Assessment, 1993
Discusses the use of the human health risk assessment model as a basis for developing ecological risk assessment (ERA). For ERA, risk to individuals is less important than the survival of the population, with the exception of endangered species. Suggests that ERA take into account the relative reproductive value of the potentially impacted…
Descriptors: Ecology, Environmental Education, Environmental Research, Evaluation Methods
Peer reviewed Peer reviewed
Conquest, Loveday L. – Environmental Monitoring and Assessment, 1993
Presents two statistical topics and examples of their use in natural resource monitoring. The first topic deals with use of correlated observations in calculations of variance estimates for a regional mean, required sample size determination, and confidence intervals. The second topic concerns the use of Bayesian techniques in hypothesis testing.…
Descriptors: Bayesian Statistics, Environmental Education, Environmental Research, Evaluation Methods
Peer reviewed Peer reviewed
Varis, Olli; And Others – Environmental Monitoring and Assessment, 1993
Presents one approach to handling the trade-off between reducing uncertainty in environmental assessment and management and additional expenses. Uses the approach in the evaluation of three alternatives for a real time river water quality forecasting system. Analysis of risk attitudes, costs and uncertainty indicated the levels of socioeconomic…
Descriptors: Attitudes, Cost Effectiveness, Environmental Education, Environmental Research