Siltation study of Haringvliet estuary gets follow-up
Coalition decides to develop shared vision for coastal zone
The seabed in the Haringvliet estuary has changed dramatically in recent decades and the process of silting continues. The silting of the coast has implications for recreation, tourism and shipping. The silting provides opportunities for wildlife and breeding birds. These are some of the findings of the study on the future development of silting and its effects. The study was published today and will be followed up.
In conversation about the future
In 2021, a coalition of 12 parties commissioned the study into the silting of the Haringvliet estuary and its consequences. According to Lies van der Pol, Alderman Municipality of Westvoorne, the results provide important information for the future of the coastal area: "Now that we know that the silting is continuing, we have choices to make together for this area. For both the short and the longer term. To what extent is intervention possible or desirable? And can we also create added value for both nature and recreation? The study revealed important facts and insights. More importantly, we got to know each other and each other's interests and concerns. This can help the coalition stay in conversation about the future."
Dot on the horizon
The survey took place over the past year. The coalition parties and stakeholders were well connected during this period. The coalition wants to follow this up and develop a joint vision for the area in the coming period. Jeannette Baljeu, Provincial Executive member for South Holland, said, "It is extremely valuable that we as a coalition have joined hands and have a close collaboration with stakeholders. We are using the results of the study and the possible perspectives on the future to determine the joint dot on the horizon and to arrive at a supported vision. A vision that must contribute to this coastal area remaining attractive for recreation, work and living".
The coastal zone is changing
The study confirms that large-scale silting of the area will continue into the future. This results in coastal accretion. New dunes and dune valleys may form. Sandbanks that are now permanently inundated will come more to the surface. Near the Green Point, a large beach plain will probably be created in a few years, as sandbanks that are currently off the coast grow onto the beach. Also, a tidal channel may first form there which, as it moves toward the coast, could lead to dune erosion. The area becomes increasingly silty and the distance from the sandy beaches to the sea increases.
Impact
The changes, initiated several decades earlier by the closure of the Haringvliet, are not without consequences. The efforts and costs to keep the Slijkgat open are expected to increase further due to silting. The effects of silting on shipping including commercial, fishing and recreational boating are limited by keeping the Slijkgat open. The accretion of the coast and new dunes provides opportunities for wildlife viewing and birds nesting in the area. There are also benefits for water safety and shoreline care by bringing sufficient sand into the system. At the same time, existing opportunities for beach recreation and tourism near the coast of Voorne are decreasing. This may affect employment because the number of visitors is expected to decline.