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For decades, water resources have been used intensively for drinking water, industry, agriculture and energy production. This paper summarises the main anthropogenic influences on the water cycle in a Pleistocene landscape and associated geochemical reactions. The results allow the identification and description of the main hydraulic and geochemical processes that control water and solute fluxes in different hydrological compartments, in particular recharge and discharge regions. Under progressive climate change, this process-based knowledge should be used to adapt land and water management to minimise negative impacts on hydrological resources and stabilise the regional water balance in theBerlin-Brandenburg Pleistocene landscape. Based on these results, a risk assessment approach for validation of future management strategies under changing climate conditions is presented.
The article informs about historical developments and recent problems in the former wetlands of the Oderbruch, which has been cultivated for agricultural use for 300 years, and in the fen region of the Rhin-Havel-Luch. The periodically inundated floodplains of Oderbruch are characterised by rich-in-clay sedimentation soils, while Rhin-Havel-Luch is a year-round wet fen region with peat soils. In both areas land use necessarily requires an adequate regional water management, employing measures and system solutions for river training, dike construction, drainage and soil cultivation. Options for action and adaptation strategies for the next 20 to 40 years, based on many years of own analyses and case studies, are presented and discussed. The article also considers an aggravation of the problems to be expected from climate change.