Preliminary estimation of groundwater recharge on Brda river outwash plain Anna Gumuła-Kawęcka, Adam Szymkiewicz, Beata Jaworska-Szulc, Małgorzata Pruszkowska-Caceres and Wioletta Gorczewska-Langner E3S Web Conf., 44 (2018) 00050 Published online: 03 July 2018 DOI: 10.1051/e3sconf/20184400050