Author(s): Can Olmez; Hagen Koch; Reinhard Hinkelmann
Linked Author(s): Reinhard Hinkelmann
Keywords: Water Resources Management; Climate Change Adaptation; Lignite Phase-Out; Spree; TELEMAC-2D
Abstract: Lignite mining in Germany’s Lusatia region has altered the Spree River catchment's landscape and water resources over the past century. The lignite phase-out by 2038 and climate change effects will significantly impact the Spree discharge and water supply security of the Berlin-Brandenburg metropolitan area. One proposed concept to ensure the future water supply is converting lakes into water management reservoirs. A hydro-numerical model was developed to investigate water flows and exchange processes in Lake Schwielochsee, crossed by the Spree. Eleven scenarios analyzed discharge volumes and water quality after the lignite phase-out. The operation of the Spree weir in Beeskow controls the lake's operational volume. The results show that under future flow conditions, the fully utilized operational volume could support the Spree's minimum discharge for approximately one month during summer. Simultaneously, improved water exchange by reconnecting the Spree oxbow is recommended to mitigate intensifying ecological problems in the Schwielochsee.
Year: 2024