Section: New Results

Definition of the research priorities, and first works

As STEEP addresses pluri-disciplinary research topics that are new both for INRIA and for the STEEP members, our very first goal of this year has been to define and specify the four research priorities described above: (a) development of numerical systemic models (economy / society / environment) at local scales; (b) calibration and convergence of integrated models; (c) consideration and management of uncertainties in integrated models; (d) environmental impacts of urban policies.

To gain better insight into these issues, we choose to start with the TRANUS model, as first experimental framework. We collaborate closely with IDDRI (Institut du Développement Durable et des Relations Internationales, Paris http://www.iddri.org/ ), that has implemented a TRANUS model applied to the city of Grenoble in the context of the AETIC project. We make use of this model as starting point to investigate the three first topics.

• (a)

  We have started a project consisting in designing and implementing an integrated model by ourselves, in close collaboration with the EDDEN laboratory (laboratoire d'Economie du Développement Durable et de l'Energie, Grenoble http://webu2.upmf-grenoble.fr/LEPII/spip/spip.php?article22 ) and IDDRI. The goal in to enrich the transport / land use Grenoble model with energy sectors, using the data and analysis our partners are generating in the context of the AETIC project. The goal here is to find a way to encapsulate in or combine the energy models proposed by EDDEN with the TRANUS model implemented by IDDRI for Grenoble.

• (b)

  We participated to the still on-going calibration procedure of the Grenoble models, which is leaded by IDDRI and Modelistica. This helped us to identify the keypoints of the calibration of such a model, and to propose first semi-automatic approaches based on simple parameters optimizations.

• (c)

  We started an uncertainty analysis of this model.

Parallel to that, we have taken an interest in the LEAM model and URBANSIM and we are preparing an ANR project on TRANUS and URBANSIM which would allow us to deeply compare the very different representations on which they are based on.