Showing papers by "Guohe Huang published in 1999"

Fuzzy Relation Analysis for Multicriteria Water Resources Management

Abstract: This paper is a summary of the efforts of Working Committee 4 (WC4) for the Great Lakes–St. Lawrence River Basin water levels reference study. A fuzzy relation analysis (FRA) model was used to analyze (including ordering, rating, ranking, and screening) numerous disparate alternatives that had accumulated over the course of WC4's study. Compared with other multicriteria methods for impact assessment under uncertainty, the FRA has advantages in data availability, computational requirements, and results interpretation. Relative strengths and weaknesses of different alternatives were evaluated by relating their impacts to a number of evaluation subcriteria. The results indicated that reasonable solutions have been generated, which were helpful for governments/stakeholders to obtain insights into the interrelationships between different system components. They, with results of other International Joint Commission research projects, also provided useful bases for assessing the relative effectiveness of differe...

Environmental Risk Assessment for Underground Storage Tanks Through an Interval Parameter Fuzzy Relation Analysis Approach

Abstract: In this study, an interval parameter fuzzy relation analysis (IPFRA) model is proposed for environmental risk assessment of petroleum-contaminated aquifers due to leakage from underground storage tanks The model can effectively incorporate effects of different pollutants and different remediation techniques within a general framework Also, it can directly reflect uncertainties presented as inexact intervals for a number of modeling inputs Results of a case study indicate that reasonable solutions for risk assessment under different system conditions have been generated When no remediation action is undertaken, environmental conditions at the study site may be ''highly risky'' in terms of their relation to drinking water safety Four potential site remediation strategies are analyzed They have different environmental and economic characteristics, with lower risks generally correspond ing to higher costs Trade-offs between environmental and economic objectives are then analyzed In general, the IPFRA

A hybrid GIS-supported watershed modelling system: application to the Lake Erhai basin, China

Abstract: In this study, a hybrid GIS-supported watershed modelling system is developed for integrated planning of water pollution control in the Lake Erhai basin, China. The system comprises a GIS-supported database, simulation/optimization models, and user interfaces developed through Arc/Info and Arc View. An inexactfuzzy multi-objective optimization model is developed for assessing a variety of system objectives and generating desired decision alternatives. It can effectively reflect uncertain, interactive and multi-objective features of the study system, and its solutions provide decision makers with a flexible decision space. The GIS technology is used for managing spatial and non-spatial data, linking models, and providing interfaces between the models and their users. The developed modelling system allows regional planners to obtain desired plans of human activities under a variety of objectives and constraints and to examine consequences and impacts resulting from alternative management practices.