Waterveiligheidsopgave als katalysator voor innovatie in het Eems-Dollardgebied

Jantsje van Loon-Steensma & Harry Schelfhout

Innovatieve dijkconcepten, Eems-Dollard-estuarium, Waterveiligheid, Natuur, Slib

De toekomstige waterveiligheidsopgave vraagt om innovatieve en flexibele maatregelen die passen in een langetermijnstrategie. Bij het daadwerkelijk implementeren van innovatieve dijkconcepten is de verbinding met andere beleidsopgaven en partners cruciaal. Zo bleek voor de innovatieve dijkconcepten ‘brede groene dijk’ en ‘dubbele dijk’ de verbinding met natuurwaarden, waterkwaliteit en economische perspectieven nodig om een breed draagvlak te verwerven onder natuurorganisaties, overheid en bedrijfsleven, en om financiële en juridische belemmeringen te overkomen.

Innovative dike concepts – Water safety as a catalyst
for innovation in the Ems-Dollard area

Innovative dike concepts, Ems-Dollard estuary, water, safety, nature, clay

There are currently several innovative dike concepts implemented along the Ems-Dollart estuary. This includes the Wide Green Dike and the Parallel Defense concepts. A Wide Green Dike has a grass covered mildly sloping seaward face. The clay needed for the Wide Green Dike is extracted from a clay pit in the adjacent salt marsh. The Parallel Defense concept consists of a system of a parallel dike landward of the existing seaward dike with a zone between these two dikes that is exposed to tidal impacts through a culvert. Both the Wide Green Dike and the Parallel Defense must comply with the strict Dutch safety standards. Although the Delta Program Wadden region played an important initiating role in the search for innovations, it was the Dutch Flood Protection Program that facilitated the exploration and implementation by providing funding. Furthermore, the co-benefits for other functions, alignment with the water quality policy, and collaboration with a range of stakeholders ensured that both pilots received additional funding and that legal hurdles were overcome. It is expected that in a changing climate with increasing sea-levels, the current pilots are gaining even more value, because of the developed knowledge and experience with adaptive and sustainable dike reinforcement.

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