Management and monitoring

• Owner of the plot: responsible for draining water on their own property.
• Local council: manages groundwater and sewage in the city or village.
• Water authority: manages water in the region, determines water levels, and monitors water quality.
• Provincial executive: prepares regulations and monitors whether local councils and water authorities are doing their job properly.
• National government: prepares national regulations for water safety.

Drainage is the removal of excess water from rural and urban areas. Dewatering is the regulation of water levels so that the land remains usable for agriculture, nature, and construction. 

• In urban areas, the local council is responsible for the drainage of rainwater and wastewater via the sewer system. The local council is the first point of contact in the event of flooding caused by groundwater. Sometimes it works together with the water authority or the provincial executive.
• In rural areas, the water authority regulates drainages with ditches, canals, and pumping stations. For example, the water authority deals with drainage via main watercourses, such as the Grote Masloot and Peizer Schipsloot.
• The provincial executive supervises and prepares regulations for groundwater management.

The plot owner is responsible for water on their own property.

The water authority measures the groundwater and surface water in and around De Onlanden. 

• This information is publicly available at the WAM portal.
• Employees also monitor conditions outside in the field, especially during high water levels. If necessary, the water is controlled with weirs and pumping stations: they either retain it for longer or pump it away more quickly.