Water does not stop at city limits – this applies not only to streams and rivers, but also to groundwater. It is therefore practical to organise the quantitative and qualitative management of the groundwater centrally. The standards for this are defined in the European Water Framework Directive. If quantities and chemical Quality do not fulfil the requirements, the management must take place on the basis of integrated concepts. These need to take into consideration all factors that could affect the quantity or quality of the groundwater. The quantity is affected e.g. by waterbody restructuring, mining, sewer systems and stormwater infiltration, while the quality is affected e.g. by contaminated sites and background contamination levels. We perform These tasks for the catchment areas of the Emscher and Lippe.
Professional groundwater management requires a reliable information base, which we ensure through regular groundwater measurements. In addition to our own groundwater measuring stations, measuring stations of the cities, the state, and the mining industry are utilised. To record groundwater levels, we currently have access to around 7,400 groundwater measuring stations. On the basis of the measured values, and with the aid of numerical groundwater flow models, we can analyse various issues relating to groundwater hydraulics. The forecasts generated increase planning and investment security of our waterway restructuring measures, as well as for sewer construction and sewer renovation.