Présentations Colloques

Oral Presentation
Session 5.01: Groundwater resources in a world facing climate change
El Assaoui Naima
Global methodology for climate change impacts on groundwater resources assessing- Morocco's case study
Morocco is an arid country where the hydraulic potential is limited and most aquifers are overexploited involving a continuous decrease of their piezometric levels. The annual total deficit is approximated to 1 billion m3. This situation is due to an increase in water demand to respond to the various objectives fixed by the national development projects, correlated to the effect of the climate changes negative impacts.**Several national research papers related to the impacts of the climate changes on the groundwater resources, was published during the last decade. However the majority of them focused in one or few aspects but rarely with a global approach.**This communication based on Berrechid aquifer case study and on the international state of art, proposes a global methodology to better analyze this phenomenon. The paper is organized in different steps-**- Defining climate change scenarios in the future based on Global climatic models (GCM) and on regional climate models using “downscaling” methods.**- Aquifer’s recharge modeling using climatic parameters (rain, temperature and solar radiation) and their evolution inside the hydrological cycle.**- Salt intrusion modeling under the effect of sea water level increase**- Aquifer’s hydrodynamic modeling in both steady and unsteady regimes and calibration process**- Impact of climate change on groundwater resources modeling analyzing the effect of different issues especially- recharge, saline intrusion, and pumping rates.**A global flow chart will be proposed and a panel of tools will be recommended, to help to improve this phenomenon analysis in Morocco. **