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Modelling Contrasted Management Behaviours Of Stakeholders Facing A Pine Encroachment Process: An Agent-Based Simulation Approach, Michel Etienne, Christophe Le Page
Modelling Contrasted Management Behaviours Of Stakeholders Facing A Pine Encroachment Process: An Agent-Based Simulation Approach, Michel Etienne, Christophe Le Page
International Congress on Environmental Modelling and Software
In Southern France, the Causse Méjan is a natural ecosystem of high biological diversity. Sheep farmers, foresters, and a National Park are interacting in this land subject to pine encroachment by Pinus sylvestris and P. nigra at different temporal and spatial scales. The stakeholders are concerned by this global biological process although it affects their management goals (sheep production, timber production, nature conservation) in very different ways. An agent-based model has been built with the Cormas platform. Vegetation changes in terms of structure, composition and productivity were simulated by a cellular automata that was initialised as a spatial grid of …
An Application Of Queuing Theory To Waterfowl Migration, Richard S. Sojda, John E. Cornely, Leigh H. Fredrickson
An Application Of Queuing Theory To Waterfowl Migration, Richard S. Sojda, John E. Cornely, Leigh H. Fredrickson
International Congress on Environmental Modelling and Software
There has always been great interest in the migration of waterfowl and other birds. We have applied queuing theory to modelling waterfowl migration, beginning with a prototype system for the Rocky Mountain Population of trumpeter swans (Cygnus buccinator) in Western North America. The queuing model can be classified as a D/BB/28 system, and we describe the input sources, service mechanism, and network configuration of queues and servers. The intrinsic nature of queuing theory is to represent the spatial and temporal characteristics of entities and how they move, are placed in queues, and are serviced. The service mechanism in our system …
Modelling Intervention Strategies For Cooperative Environmental Management, Jim Doran
Modelling Intervention Strategies For Cooperative Environmental Management, Jim Doran
International Congress on Environmental Modelling and Software
Central to sustainable natural resource management is the achievement of cooperation and collective action amongst stakeholders with initially conflicting short and long-term goals. It is argued that automatically generated agent-based computer models may be used to explore the ways in which external intervention can bring about effective stakeholder cooperation in environmental resource management contexts. The potential advantages of the agent-based modelling approach in this context include objectivity, and the discovery of currently unrecognised intervention strategies of practical value. An experimental procedure is proposed, and, by reference to a detailed design for a class of agent-based models, the technical obstacles that …
A Step-By Step Approach To Build-Up Land Management Scenarios Based On Multiple Viewpoints On Multi-Agent System Simulations, Michel Etienne, M. Cohen, Christophe Le Page
A Step-By Step Approach To Build-Up Land Management Scenarios Based On Multiple Viewpoints On Multi-Agent System Simulations, Michel Etienne, M. Cohen, Christophe Le Page
International Congress on Environmental Modelling and Software
A multi-agent system was developed to simulate strategies of natural resources management in the remarkable site of the Causse Méjan, a limestone plateau dominated by a rare pseudo-steppe endangered by pine encroachment. To stimulate the emergence of alternative long-term management strategies of the sheep farms and of the woodlands, contrasting dynamic viewpoints on land resources were designed at different space scales. In a first step, they were individually used to validate the model with each main stakeholder (foresters, farmers and the National Park of Cévennes rangers), to improve it and to propose individual scenarios of natural resources management. Once the …
Modeling And Analysis Of Biofilms Formation And Evolution In Wastewater Treatment Processes Using Multi-Agent Systems, Laurent Lardon, Jean-Philippe Steyer, Nicolas Bernet, Christophe Le Page
Modeling And Analysis Of Biofilms Formation And Evolution In Wastewater Treatment Processes Using Multi-Agent Systems, Laurent Lardon, Jean-Philippe Steyer, Nicolas Bernet, Christophe Le Page
International Congress on Environmental Modelling and Software
Biofilms are complex but omnipresent and industrially important structures. Many studies were devoted to build mathematical models for biofilm analysis but most of them were based on classical continuous approaches. On the other side, only very few studies were directly based on the functional mechanisms to obtain virtual systems which mimic the descriptive observations and allow to predict the state of a biofilm and its possible evolution. This paper will present a non-classical approach based on multi-agent systems for the analysis of biofilm formation. This model shows the spatial repartition of biomass within the biofilm and the impact of the …
How Bad Isn't The Agent-Based Model Catchscape?, N. Becu, P. Perez, Olivier Barreteau, A. Walker
How Bad Isn't The Agent-Based Model Catchscape?, N. Becu, P. Perez, Olivier Barreteau, A. Walker
International Congress on Environmental Modelling and Software
Due to mounting human pressure, stakeholders in northern Thailand are facing crucial natural resource management issues. The impact of upstream irrigation management on the downstream agricultural viability is a common source of conflict. It has often both biophysical and social origins. CATCHSCAPE has been developed as an Agent-Based model that enables us to describe the whole catchment: hydrology, farmers’ behaviour and water management rules. It is meant to simulate scenarios based on assumptions about value of these features as well as some assumptions about context, such as levels of prices for various commodities or climate. The biophysical modules are made …