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Considering the value of hydromorphic soils in their use how to design public policies toward land markets? (ECOSOLHYDRO)

Considering the value of hydromorphic soils in their use how to design public policies toward land markets? (ECOSOLHYDRO)

Summary
The project main aim is to explore strategies that can be used in order to regulate land use in order to protect the function of water quality regulation of soils. We focus on two main strategies. The first strategy is a curative one. It aims at buying lands that are identified as wetlands in order to protect the function of water quality regulation of wetlands. We assume that agricultural lands are the one that need the least costs in order to restore the function of water quality regulation of soils. As a consequence, we focus on agricultural lands. The main aim of this strategy is to modify land use from an agricultural use to a preservation use. The second strategy is more preventive. It consists in the exploration of the possibilities of actions that target the source of pollutions, i.e. agricultural practices. Since these strategies are different, we chose to investigate them separately. The consequence of this choice is that it enables us to explore the function of water regulation quality of soils for two pollutants: nitrogen and pesticides.
 
The principle of the first strategy is to select wetlands to buy in order to protect the function of water quality regulation of soils for the nitrogen case. It can be decomposed into three aims. The first aim is to identify and localize potential wetlands based on bio-physic and hydrologic criteria. The work was done by specialists in soil science. The second aim is to rank potential wetlands with respect to their efficiency in nitrogen assimilation. Hydro-chemists did the work. The third aim is to rank potential wetlands with respect to their cost. Geographers and economists did the work.

The principle of the second strategy is to modify agricultural practices with respect to pesticides use. Within this framework, we decided to concentrate on a specific technology of pesticides use: integrated pest management. The first aim here is to define in a precise way the integrated pest management technologies that can be implemented from an agronomical point of view on a particular water catchment area. The second aim is to characterize the effect of the technologies hence defined on the water quality of the catchment area. The third aim is to determine the economic driving forces of the adoption of an integrated pest management technology. This last aim is achieved with theoretical analysis from economics and with empirical agro-economic analysis.

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Contact
AgroSup Dijon (Elsa Martin)

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