In The CLEW Model – Developing an integrated tool for modelling the interrelated effects of Climate, Land use, Energy, and Water (CLEW)

This paper introduces the prototype of new tool which analyses the Climate-, Land-, Energyand Water(CLEW) re-sources and their interactions and implications associated with socioeconomic development. The presented CLEW model focuses specifically on the analysis of different energy (technology) options and their impact on other resources – e.g. their contribution to climate change, land use change, and water consumption. The CLEW model systematically quantifies trade-offs associated with actions aimed at meeting development goals (specifically energy, food, and water supply) and their impact on the climate, water and environment. The model quantifies resource use with calculations based on collected data, assumptions and user-defined scenarios. Importantly, the model is not limited to internal or national effects but also includes external changes induced through energy imports or exports and land use change. Exemplary, a first preliminary modelling exercise for the island of Mauritius has shown very strong implications on GHG emissions when switching to locally produced biofuels (bio-ethanol) through induced land-use changes and is presented in the second part of this paper. * Corresponding author