Register

The Noorderzijlvest Water Authority deals with waterproofing the future, and provides sufficient water, and healthy water. To achieve this, the water authority imposes requirements on the water-management structures its management area.

Updated Registers

The water authority amends the registers because the current ones are outdated. 

We record some of this information in two registers. These registers provide insight into what the water authority manages and the associated requirements: 

  • Water-management structures Register. The Register provides information about the location, shape, standard dimensions, and construction of water-management structures under its management.
  • Maintenance register. The maintenance register specifies the maintenance obligation (the work in question) and the party responsible for maintenance.

Amended registers available for inspection 

Before we adopt our registers, they are available for inspection for six weeks. 

The draft partially amended Register and the draft partially amended Maintenance Register will be available for inspection from 17 February to 31 March 2026 .

You can view the documents directly online:

You can also view the documents at our head office:

  • Stedumermaar 1 in Groningen.
  • To do so, please make an appointment by calling our general telephone number: +31 (0)50-304 8911.

Opinion

You can submit your opinion in writing to the Executive Board of the Noorderzijlvest Water Authority until 31 March 2026. You can do this by sending a letter to: Postbus , 9700 AA Groningen, or by email to info@noorderzijlvest.nl.

More information

For more information, please contact Noorderzijlvest water authority on +31 (0)50 304 8911. The contact person for the draft registers is Carolien Klunder.

What is a Register?

A Register a collection of technical, digitally accessible drawings of the water authority. The drawings in the so-called Water-Management Structures Register show which waters and flood defences the water authority has, and how we believe they should look. By flood defences, we mean dykes and quays.

The Maintenance Register specifies who is responsible for maintaining each watercourse, quay, or dyke: the water authority or a private individual for example. Sometimes there is a shared maintenance obligation. It is also possible that it is not yet clear who is responsible for maintenance. We are gradually bringing the Maintenance Register up to date for our entire region.

Which registers are used by the water authority

The following registers are valid:

  • Water-management structures register 2023
  • Maintenance register 2023

You can find the two registers on the interactive map.

What is included in the Water-management structures register?

For water-management structures managed by the water authority, the Water-management structures register records the requirements that must be met by water-management structures in terms of location, shape, size, and construction.

  • The location of water-management structures is shown geographically on the Register.
  • When you select a water-management structure on the map, additional information about its shape, dimensions, and construction are displayed (the digital register).
  • The information displayed depends on the nature and function of the structure. 

Please note that the information is not complete yet. Some data is not yet available. As long as data is not available, the relevant fields will be left blank. In the absence of standard dimensions, it has been decided to temporarily include the actual dimensions in the Register where possible (provided they are known to be sufficient for the function of the structure). In both cases, the register includes a note stating that the missing data is still to be determined and may be provided on request. 

Water-management structures register 2023

View online

The Water-management structures register can be consulted digitally with the digital mapRegister 2023 (adopted by the Board of Directors on 14 December 2022) (arcgis.com).

View in the office

You can also view the water-management structures Register by appointment during office hours from 9:00 to 17:00 at the water-authority building, Stedumermaar 1 in Groningen. You can make an appointment with the Front Office of water authority. They can be reached by telephone at: +31 (0)50-304 8911.

What is included in the Maintenance Register

The Maintenance Register specifies who is responsible for maintenance and what the maintenance obligation is (i.e., the work or part of the work subject to a maintenance obligation) for water-management structures or other works that affect the operation of water-management structures

  • The location of these structures is shown geographically on the Register.
  • When you select a structure on the map, additional information is displayed (the digital register).
  • A party with a duty of maintenance is a legal entity (companies, organisations, institutions, governments) or a natural person.

Duty of maintenance regulations 

The regulations for designating parties with a duty of maintenance are set out in the Water-Authority Regulations and, for bank-protection work they are specified in the policy document on the duty of maintenance for bank-protection work.

Bank-protection work policy 2022.pdf (Dutch only)

Please note that the information is not complete yet. Some data is not yet available. As long as data is not available, the relevant fields will be left blank.

Maintenance register 2023

View online

The Maintenance Register 2023 can be consulted digitally Maintenance Register 2023 (adopted by the Bestuur of Directors on 14 December 2022) (arcgis.com)

View in the office

You can also view the Maintenance Register 2023 by appointment during office hours from 9:00 to 17:00. at the water-authority building, Stedumermaar 1 in Groningen. You can make an appointment with the Front Office of water authority. They can be reached by telephone at: +31 (0)50-304 8911.

Interactive Map Register

How does an interactive map work?

With an interactive map, you can zoom in on flood defences and watercourses. Zooming in reveals more information. For example, would you like to know if there is a flood defence or watercourse in your neighbourhood? 

  • Then search by your street, house number, and town name or by postcode. Select the "search" tile (the tile with a magnifying glass on it).
  • Would you like more information? Select one of the key items of the map. More information will appear in a pop-up screen.
  • Would you like to make a print-out? Select the 'print' tile (tile with a printer icon). The print menu allows you to export and save the displayed map. The map can then be printed.

What do we use the register for?

We use the registers to check where we need to carry out maintenance. This is how it works:

  • We have a management register. This management register shows how the water system actually works. How does the water flow, where are the structures located?
  • In this register, we keep track of the current status and condition of our water, pumping stations, locks, and weirs.
  • Then we compare the data in the register with our records. These records specify the requirements our water, pumping stations, locks, and weirs must meet. This enables us to identify where maintenance is required.
  • These registers also indicate who is responsible for maintaining the supporting structures in the water system and flood defences. Pumping stations, weirs, locks, and inlets are referred to as "structures" in water-authority terminology.

Register policy

How we deal with the information in the Register is set out in our Register Policy 2022.pdf  (Dutch only).

Explanation of words related to water

Washlands

Washlands are areas that can be used by the water authority during high water levels to temporarily store more water in the water system. This refers to the area itself, not just the water in the area, such as a canal or lake. The provincial executive determines which areas are washlands. For example, Onlanden is a washland area in the Noorderzijlvest region.

Management register

The management register is a collection of basic data on water-management structures and other works in the area managed by the water authority. This data is important for managing the water system and treating wastewater. Examples include the length, width, and depth of a canal or how much wastewater a treatment plant can process. The management register forms the basis for daily management and maintenance of the water authority.

Structures

A structure is a construction that is necessary for roads, water, railways, flood defences, or pipes. Examples include bridges and pumping stations. Such constructions are not intended for residential use.

Surface water bodies

A surface water body is a collection of interconnected bodies of water, such as streams, ditches, canals, and lakes. Examples include a canal with ditches that flow directly into it, or a lake. The surface water body also includes the soil and banks, the plants and animals, and the substances in the water. These substances include nutrients and pollutants.

Flood defence

In the water-authority regulations, flood defences are divided into:

  • Primary flood defence

    • A primary flood defence is a man-made elevation in the landscape that protects the land behind it from flooding by seawater. This man-made elevation can be a dyke, sheet piling, dyke passage, or quay wall, for example. The government determines which flood defences are primary flood defences.

  • Regional flood defence

    • A regional flood defence is a constructed or natural elevation in the landscape that protects the land behind it from flooding by water from the catchwater. This elevation can be a dyke, sheet piling, quay wall, or naturally elevated land, for example. The provincial executive determines which defences are regional defences.

  • Other flood defences

    • Other flood defences are constructed or natural elevations in the landscape that protect the land behind them from flooding. These elevations include dykes, sheet piling, quay walls, or naturally elevated land. The water authority determins which defences are classified as other defences.