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Originally, MHYDAS is a runoff-rainfall model developed by the LISAH laboratory for studying effect of agricultural management on the hydrological behaviour of a farmed catchment during rain events (Moussa et al., 2002, Hydrol. Process. 16). Now, MHYDAS has been extended to surface-groundwater exchanges, water balance, pollutant fate and transport, and erosive processes.

MHYDAS can be used at different scales -from field to catchment, and from short event to long term simulations- i) to study and to focus on specific processes, ii) to assess the environmental impact of agricultural practices, iii) to evaluate different scenarii (climatic changes, land use and human activities management, ...).

As an example, MHYDAS has already been implemented to study water and pesticides transfer on Mediterranean catchment (ANR ADD GeDuQuE, EU Life Aware), or on tropical catchment in French West Indies (Charlier, 2007, PhD). It is available as OpenFLUID simulation functions, and relies on three units classes (surface units, reach segments and groundwater units). The simulation functions can be used all together or independently.


Modeled fluxes with MHYDAS