3. Geological environments and their specific features

3.1 Geological data

Geological site characterization involves acquiring data on lithology and hydrogeology. This involves determining the hydraulic conductivity, permeability, texture and porosity of the environment, as well as groundwater flow direction and gradients. Preferential flows must also be investigated, to understand how pollutants and injected products can migrate.

Knowledge of the succession and distribution of different types of rock is important:

• fine/coarse alluvium ;

• ...