# Lands, cities and campaigns face to the climate change and urban sprawl : an innovative IT platform and forecasting decision support tool for local authorities.

Fabienne Trolard

## ► To cite this version:

Fabienne Trolard. Lands, cities and campaigns face to the climate change and urban sprawl : an innovative IT platform and forecasting decision support tool for local authorities.. Nanjing Mayor's Consultative Roundtable “Promoting Nanjing's environmental protection and achieving sustainable and green development”, Sep 2013, Nanjing, China. hal-01604390

HAL Id: hal-01604390

https://hal.science/hal-01604390

Submitted on 3 Jun 2020

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**Title:** Lands, cities and campaigns face to the climate change and urban sprawl: an innovative IT platform and forecasting decision support tool for local authorities.

DR. Fabienne Trolard

Research Director

INRA

France

*With the contribution of Astuce & Tic and PRECOS consortia*

**Abstract**

The European PRECOS project, that it has just start, proposes an innovative IT platform and forecasting decision support tool (Astuce & Tic) giving a synthetized vision of an area, measuring in real time, pressures, resilience potential and tipping points over natural resource assets and helping to manage ecosystem services under mounting climate and anthropogenic pressures. This has potential for radically transforming land management and resources based services and facilitating the transition of local stakeholders and economic actors to the quaternary economy.

The Astuce & Tic approach is the result of a public private collaborative R&D project, financed with the help of French national and regional financing programs between 2008 and 2011. It developed IT tools to model and simulate the complex interactions between economic development, land allocation, climate, underground water, agriculture and irrigation, and applied them on a demonstration area: the Crau area in south of France.

On Crau area, we demonstrate that (i) urban sprawl uses up significant surfaces of natural and farmland and we show that between 1997 and 2009 up to 1600 ha have been irreversibly destroyed; (ii) grasslands' gravity irrigation is a sustainability factor in the area and (iii) agricultural activities are a source of vital ecosystems services and contribute to 75% of the renewal of groundwaters.

In a prospective vision to 2030 horizon, the Astuce & Tic approach put to light the fact that the consumption of land resources for economic activities generated too much strain on the water cycle and that, if nothing major is done, in less than twenty years, underground water would function in a reverse mode, i.e. that salt will progressively poison the ground making centuries of efforts wasted in no time.

This example highlights both the dramatic reality that the competition for urban land may take, and also the fact that the impact may not always be noticed on the local scale and that governance must also be effective at more global scale than the level of *prima facie* decision.

**Biography**

**Dr Agr. Fabienne Trolard** is a research director at the UMR INRA-UAPV « Mediterranean environment and modelling of agro-hydrosystems ». With a PhD and "Agrégation de l'Enseignement Supérieur" in Earth Sciences, specialist in mineral geochemistry and geophysics, she has been working at INRA, for 20 years, in soil and environmental sciences. She has provided expertises for DGVI (1998-2002), DGXII (1999-2003) EU and for the IPCC (2012). She co-created the INRA lab « Geochemistry of soil and water » at Aix-en-Provence in 2000 and was its leader for 6 years (2004-2009). She was the INRA scientific leader of the Astuce & Tic program (2008-2011) and leads the PRECOS project (2013-2014).
Since 1986, she has published over 250 papers and supervised 12 PhD candidates and 3 post-docs. She teaches at the Universities of Aix-Marseille (Master MAEVA) and Poitiers (Master NMAC, Eramus Mondus).