1. Introduction.- 1.1. Regional economic modelling.- 1.2. Environmental issues in regional economic modelling.- 1.3. Integrated environmental modelling.- 1.4. Outline of the study.- A. Introduction to Integrated Environmental Modelling: A Survey and an Evaluation.- 2. Integrated Environmental Models: A Survey.- 2.1 Introduction.- 2.2. Multi-objective control of nutrient loadings into a lake.- 2.3. Simulation of regional development and fishery activities.- 2.4. Policy analysis of water management for the Netherlands.- 2.5. Policy analysis to protect an estuary from floods.- 2.6. Economic-environmental-ecological impact analysis of flood plain models.- 2.7. An economic-ecological model for land-marine integrated development.- 2.8. An environmental ecosystem quality management model.- 2.9. A triple layer approach to a national-regional economic- environmental- employment model.- 2.10. Systems approach of economic-environmental-energy analysis.- 2.11. Simulation of the impacts of herbicides on the environment and agriculture.- 2.12. Economic-ecological analysis by simulation and optimization.- 2.13. Urbanization and environmental planning and design.- 2.14. An integrated regional environmental model for physical planning.- 2.15. Interactions between economic-social-ecological systems in a region of intense agriculture.- 2.16. Concluding remarks.- 3. Evaluation of Integrated Environmental Modelling Approaches.- 3.1. Introduction.- 3.2. The objective of study and the objective of analysis.- 3.3. The modules and the mathematical tools.- 3.4. Dimensions of space and time in integrated environmental models.- 3.5. The availability of information in integrated environmental models.- 3.6. Concluding remarks.- B. Methodology and Tools to Operationalize an Integrated Environmental Model.- 4. A Systems Approach to an Integrated Environmental Model.- 4.1. Introduction.- 4.2. Systems theory.- 4.3. Two designs of integration.- 4.3.1. Introduction.- 4.3.2. A horizontal model approachl³V