Read how Hölscher Wasserbau extracts, treats and reintroduces groundwater sustainably during the construction of the A-Nord high-voltage DC power line, while adhering to environmental regulations. Measuring technology for sustainable network expansionRead how Hölscher Wasserbau manages groundwater extraction, treatment and reintroduction during the construction of the The A-Nord high-voltage direct current power line. Flowmeter Promag W 800 allows the company to adhere to environmental regulations and seamlessly document the water quantities. Thanks to a battery with a long life, the device operates autonomously for up to 15 years and remains dependable for use even under adverse conditions such as wetness, mud and fluctuating temperatures.Sustainable power network expansion Solutions for ecological groundwater management The energy transformation needs high-performance networks: The A-Nord high-voltage direct current power line brings wind energy from the North Sea to the consumption centers. Hölscher Wasserbau uses professional groundwater management to ensure that cables are routed safely and the environment is protected – with support from state-of-the-art measuring technology from Endress+Hauser.The customer requirementDuring construction of the A-Nord power line, Hölscher Wasserbau has to move large quantities of groundwater – and strictly adhere to environmental regulations in the process. The German Regulation on the Protection of Surface Waters (OGewV) demands careful treatment and seamless documentation of the water quantities to avoid dried out ground or damage to bodies of water and vegetation. Remote discharge points without power supply make it difficult to use conventional measuring technology.Our solutionHölscher Wasserbau installed 34 devices from Endress+Hauser to continuously collect data on extraction, treatment, and reintroduction of groundwater along the project section. Promag W 800 documents every liter for compliance with ecological standards. The battery-powered device operates autonomously for up to 15 years – even under adverse conditions. Mobile access and configuration of the measured values makes it easier to handle on-site and ensures continuous measurements without interruption.The result Legally compliant documentation of the water quantities Protection of ground, vegetation and bodies of water Autonomous operation without an external power supply Long service life, even under adverse conditionsRead the full storyCollaboration between Hölscher Wasserbau and Endress+Hauser.The electromagnetic flowmeter Promag W 800 measures the quantity of groundwater."Water neutrality can only be achieved if we know exactly how much water we extract, treat, and return. Precise measuring technology creates the necessary transparency for this.""Water neutrality can only be achieved if we know exactly how much water we extract, treat, and return. Precise measuring technology creates the necessary transparency for this and forms the basis for our goal of water-neutral operation by 2030."Robin Korte Water neutrality managerHölscher Wasserbau GmbHDevices usedProline Promag W 800: electromagnetic flowmeter for precise measurement and documentation of the groundwater quantitiesProline Promag W 10: measurement of the flow rate in iron removal systems Cerabar PMC21: pressure transmitter for monitoring pumping and filtering processes