BLANC - Blanc

4D Dynamics of water in a karst environment by a coupled geodetic and geophysical approach – Hydrokarst G2

Submission summary

During the last decade, a part of the international geophysical and geodetic communities have focused their activities towards the analysis of the climate system in the frame of global change. An important effort has been done to better understand the coupling between the atmosphere, the hydrosphere and the solid earth. This is especially the case for continental water for which a precise monitoring of the stock is a major societal challenge. This task may be achieved at various scales using different geodetic methods. Understanding the water storage and flow in karst aquifers is one of the most important challenges. With the increased demand of water, the importance and awareness of karsts aquifers has grown, in particular in the countries of the Mediterranean circumference. The groundwater recharge of karst systems is a key variable for the assessment and management of groundwater resources in many Mediterranean countries. Quantification of the recharge-discharge is needed to estimate the sustainable yield of aquifers and to predict the impacts of climatic change on the long term groundwater resources of the karst aquifers. We aim to apply two accurate 'nano geodetic methods', i.e. the absolute/superconducting gravimetry and tiltmetry, to assess the water transfer characteristics inside the karst systems. This set of geodetic measurements completed with modern ground-based and downhole geophysical observations and hydrogeochemical analyses will make possible the development of a new type of hydrodynamic karst model. Since 2005, we are attempting to develop new applications in gravimetry to monitor groundwater mass storage in karst systems (see Jacob et al., 2008). Promising results incite us to go further to this approach. By a multidisciplinary and complementary approach on a limited zone of the karst, including borehole geophysical investigations, Magnetic Resonance Soundings (MRS), complementary structural investigations (seismic and electrical tomography) and chemical properties of water infiltrated within the karst, the challenge of the project is to analyse the contribution of the different methods to model the hydrodynamics of the system. This project can lead to future development for the follow-up of the operated karst aquifers and oil reservoirs.

Project coordination

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.

Partner

Help of the ANR 0 euros
Beginning and duration of the scientific project: - 0 Months

Useful links

Explorez notre base de projets financés

 

 

ANR makes available its datasets on funded projects, click here to find more.

Sign up for the latest news:
Subscribe to our newsletter