Pollutants Transfer Modelling under Agricultural Influences in the Coastal Aquifer of Rmel (Larache, Morocco)

Maintaining water quality within the watershed and catchment area requires the availability of powerful tools for assessing the risk of contamination. Recent advances in the fields of environmental transfer models and the availability of agronomic, soil and climate can now offer innovative tools that quantify the losses of pesticides from agricultural parcels. In this research we seek to improve the understanding of certain mechanisms for the transfer of nitrates and pesticides into water, based on a case study work, which provides measurement data, and all the information on crop and plant protection practices. The interest of this study is to provide diagnostic elements compared to the risk of groundwater contamination in order to offer more environmental friendly practices and to limit pollution. To achieve this purpose, we will assess how the model (GMS model) can bring supporting tools for the diagnostics of the most sensitive agricultural parcels. After the model calibration on site, we will simulate different scenarios to estimate the impact of the choice of product and the date of application depending on the weather and the unsaturated zone.