Multi-model integration in a decision support system: a technical user interface approach for watershed and lake management scenarios

Computer simulations using mathematical models provide useful tools to investigate different scenarios based on watershed management strategies and environmental conditions. They often require the combined knowledge of meteorological, hydrological, hydrodynamic and biochemical processes in air, soil and water. While existing models for individual processes are available, computational issues (e.g. software compatibility and consistency of model assumptions) on linking and integrating these models are challenging. To resolve these issues, we propose using a technical user interface approach based on expert system technologies that provide intelligent access to databases, models, scenarios and decision support output. As an example, we applied the multimodel integration approach to a watershed management study on Lake Seymour, BC, Canada, where sediment erosion due to precipitation events or forest fires may lead to concerns of high turbidity conditions in a reservoir.