The El Niño event of 2015-2016: climate anomalies and their impact on groundwater resources in East and Southern Africa 由 Kolusu, SR, Shamsudduha, M, Todd, MC, Taylor, RG, Seddon, D, Kashaigili, JJ, Ebrahim, GY, Cuthbert, MO, Sorensen, JPR, Villholth, KG, Macdonald, AM, Macleod, DA