Management and monitoring

• Owner of the plot: responsible for water drainage on their own property.
• Municipality: manages groundwater and sewage in the city or village.
• Water board: manages water in the region, determines water levels, and monitors water quality.
• Province: makes rules and checks whether municipalities and water boards are doing their job properly.
• Central government: establishes national rules 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 soil remains usable for agriculture, nature, and construction. 

• In urban areas, the municipality is responsible for the drainage of rainwater and wastewater via the sewer system. The municipality is the first point of contact in the event of flooding caused by groundwater. Sometimes it works together with the water board or the province.
• In rural areas, the water board regulates drainage via ditches, canals, and pumping stations. For example, the water board provides drainage via main waterways, such as the Grote Masloot and Peizer Schipsloot.
• The province supervises and sets rules for groundwater management.

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

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

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