000003534 001__ 3534
000003534 005__ 20180516091154.0
000003534 0247_ $$2DOI$$a10.1002/hyp.13138
000003534 037__ $$aSCART-2018-0050
000003534 100__ $$aPoulain, Amaël
000003534 245__ $$aAssessment of groundwater recharge processes through karst vadose zone by cave percolation monitoring 
000003534 260__ $$c2018
000003534 500__ $$aKARAG project
000003534 520__ $$aRecharge processes of karst aquifers are difficult to assess given their strong heterogeneity and the poorly known effect of vadose zone on infiltration. However, recharge assessment is crucial for the evaluation of groundwater resources. Moreover, the vulnerability of karst aquifers depends on vadose zone behavior since it is the place where most contamination take place. In this work, an in situ experimental approach was performed to identify and quantify flow and storage processes occurring in karst vadose zone. Cave percolation monitoring and dye tracing were used to investigate unsaturated zone hydrological processes. Two flow components (diffuse and quick) were identified and respectively account for 66 and 34% of the recharge. Quickflow was found to be the result of bypass phenomenon in vadose zone related to water saturation. We identify the role of epikarst as a shunting area, most of the storage in the vadose zone occurring via the diffuse flow component in low permeability zones. Relationship between rainfall intensity and transit velocity was demonstrated, with 5 time higher velocities for the quick recharge mode than the diffuse mode. Modelling approach with KarstMod software allowed to simulate the hybrid recharge through vadose zone and shows promising chances to properly assess the recharge processes in karst aquifer based on simple physical models. 
000003534 536__ $$aFRS-FNRS/$$cFRS-FNRS/$$fFRS-FNRS
000003534 594__ $$aNO
000003534 6531_ $$aKarst aquifer
000003534 6531_ $$aVadose zone
000003534 6531_ $$aCave monitoring
000003534 6531_ $$aDye tracing
000003534 6531_ $$aStalactite drip 
000003534 6531_ $$aGroundwater recharge
000003534 6531_ $$aEpikarst
000003534 700__ $$aWatlet, Arnaud
000003534 700__ $$aKaufmann, Olivier
000003534 700__ $$aVan Camp, Michel
000003534 700__ $$aJourde, Hervé
000003534 700__ $$aMazzilli, Naomi
000003534 700__ $$aRochez, Gaëtan
000003534 700__ $$aDeleu, Romain
000003534 700__ $$aQuinif, Yves
000003534 700__ $$aHallet, Vincent
000003534 773__ $$pHydrological Processes$$y2018
000003534 8560_ $$fmichel.vancamp@observatoire.be
000003534 85642 $$ahttps://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.13138
000003534 905__ $$apublished in
000003534 980__ $$aREFERD