Groundwater Storage Change Estimation Using Combination of Hydrogeophysical and Groundwater Table Fluctuation Methods in Hard Rock Aquifers
| Autor: | Jean-Michel Vouillamoz, Hamma Fabien Yonli, Mahamadou Koïta, Donissongou Dimitri Soro, Amagana Emmanuel Dara |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
change of groundwater stock
geography geography.geographical_feature_category specific yield Water table 0208 environmental biotechnology water table fluctuation Soil science Aquifer 02 engineering and technology Groundwater recharge Management Monitoring Policy and Law hard rock aquifer MRS sounding Sanon catchment Burkina Faso 020801 environmental engineering Environmental science lcsh:Q lcsh:Science Water content Nature and Landscape Conservation Groundwater storage |
| Zdroj: | Resources, Vol 7, Iss 1, p 5 (2018) Resources; Volume 7; Issue 1; Pages: 5 |
| ISSN: | 2079-9276 |
| Popis: | This study aims to estimate the groundwater storage change of hard rock aquifers in the face of change. For this, the approach developed consisted initially in the implementation of 5 Magnetic Resonance Soundings (MRS) around the observation wells realized and monitored from 2014 to 2015 in the Sanon experimental site. In a second step, we determined the storage change using the MRS data and the water table fluctuation method. The MRS data show that the water content varies spatially from 4.5 to 1.3%. The maximum value is recorded at the central valley where a piezometric dome is observed. The specific yield varies from 2.4% in the central valley to 1.3% at the outlet. The renewed water resource is estimated at 116 mm in the central valley and 32 mm at the outlet, which corresponds respectively to 13 and 3% of the annual rainfall. The renewed water resource is consistent with the annual recharge. Thus, the combination of the MRS geophysical approach and water table fluctuation method is an efficient, fast and cheaper (compared with long-term pumping test) tool for the estimation of groundwater storage changes. |
| Databáze: | OpenAIRE |
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