Uncertainty and Forecasting of Water Quality
Meeting : Papers
1st Edition
Published on 1. May 1983
Book
Hardback
XII, 388 pages
978-3-540-12419-1 (ISBN)
Description
Since the International Institute for Applied Systems Analysis began its study of water quality modeling and management in 1977, it has been interested in the relations between uncertainty and the problems of model calibration and prediction. The work has focused on the theme of modeling poorly defined environmental systems, a principal topic of the effort devoted to environmental quality control and management. Accounting for the effects of uncertainty was also of central concern to our two case studies of lake eutrophication management, one dealing with Lake Balaton in Hungary and the other with several Austrian lake systems. Thus, in November 1979 we held a meeting at Laxenburg to discuss recent method ological developments in addressing problems associated with uncertainty and forecasting of water quality. This book is based on the proceedings of that meeting. The last few years have seen an increase in awareness of the issue of uncertainty in water quality and ecological modeling. This book is relevant not only to contemporary issues but also to those of the future. A lack of field data will not always be the dominant problem for water quality modeling and management; more sophisticated measuring techniques and more comprehensive monitoring networks will come to be more widely applied. Rather, the important problems of the future are much more likely to emerge from the enhanced facility of data processing and to concern the meaningful interpretation, assimilation., and use of the information thus obtained.
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Content
One: Introduction.- Uncertainty, system identification, and the prediction of water quality.- The validity and credibility of models for badly defined systems.- Two: Uncertainty and Model Identification.- An approach to the analysis of behavior and sensitivity in environmental systems.- Distribution and transformation of fenitrothion sprayed on a pond: modeling under uncertainty.- Input data uncertainty and parameter sensitivity in a lake hydrodynamic model.- Maximum likelihood estimation of parameters and uncertainty in phytoplankton models.- Model identification methods applied to two Danish lakes.- Analysis of prediction uncertainty: Monte Carlo simulation and nonlinear least-squares estimation of a vertical transport submodel for Lake Nantua.- Multidimensional scaling approach to clustering multivariate data for water-quality modeling.- Nonlinear steady-state modeling of river quality by a revised group method of data handling.- Three: Uncertainty, Forecasting, and Control.- Parameter uncertainty and model predictions: a review of Monte Carlo results.- A Monte Carlo approach to estimation and prediction.- The need for simple approaches for the estimation of lake model prediction uncertainty.- Statistical analysis of uncertainty propagation and model accuracy.- Modeling and forecasting water quality in nontidal rivers: the Bedford Ouse study.- Adaptive prediction of water quality in the River Cam.- Uncertainty and dynamic policies for the control of nutrient inputs to lakes.- Four: Commentary.- Uncertainty and forecasting of water quality: reflections of an ignorant Bayesian.