EFFECT OF A RIVER FLOOD EVENT ON THE POLLUTANT DISPERSION IN A KARSTIC AQUIFER USING DISCRETE ......

To examine the effect of a river flood wave on groundwater heads and, as a result, on solute transport within the karst, a discrete-continuum technique is created. In the hosted rock and within the conduit, Darcy's law and the Brinkman equation were used, respectively. As a case study, the karst system of the Val d'Orléans (France) was chosen. Chloride concentration values from two flood occurrences in the Loire River and at Bouillon Spring were used to assess the model's validity. The ideal permeability values in the hosted rock and karst conduits, according to the calibration technique, are 5.6E-10 m2 and 1.65E-5 m2, respectively. When the storage coefficient is 0.9 m-1, good agreement is attained. The simulation demonstrates that when chloride infiltrates into the karst from the Loire River, the distance penetrated by chloride in the hosted rock is 530 m for a two-month flood of roughly 2 m. The volume of a susceptible aquifer around a karstic conduit is calculated in this way, emphasising the necessity of water exchange between the conduit and the hosted rock.

Please see the link :- https://www.ikprress.org/index.php/JOGEE/article/view/1183