Green-blue veining (GBDA) is a term you increasingly see in policy documents, spatial plans and nature programmes. But what exactly does it mean, why is it seen as important and how does it fit into national objectives such as strengthening biodiversity, climate adaptation and living environment quality?
What do we mean by green-blue veining?
In essence, it refers green-blue veining to the network of natural elements in the landscape in which green structures (such as rows of trees, canals, hedgerows and wooded banks) and blue structures (such as streams, ditches, ponds and natural banks) are interconnected. This network forms a veining of the landscape and contributes to the structure, function and quality of the ecosystem.
In rural areas, these elements have traditionally been landscape elements created and maintained by farmers and managers, such as hedges for livestock separation and ditches for water management. However, economies of scale and agricultural intensification have caused many of these elements to disappear, leading to a reduced landscape identity and decline in biodiversity.
Why is green-blue interlacing important?
1. Improving biodiversity
One of the reasons for the policy around green-blue veining is the biodiversity loss through habitat fragmentation. A veined network makes it easier for plants and animals to migrate, reproduce and find food, which is essential for robust ecological communities. Networks of connected elements act as ecological corridors and reduce the effects of habitat fragmentation.
Organisations such as Landscape Overijssel stress that for biodiversity, it is important that small green elements are close to larger natural areas and that water bodies have natural banks and relatively low nutrients to function ecologically well.
2. Enhancing landscape and cultural history
Green-blue elements are often part of the cultural-historical identity of the Dutch landscape: wooded banks, hedges and ditches characterise regions such as the Noardlike Fryske Wâlden or the Staphorsterveld. Restoring these elements not only contributes to ecology, but also to perception and recognisability of the landscape.
3. Water management and climate resilience
Blue elements such as natural watercourses and wetlands help with water storage, infiltration and climate adaptation. In times of extreme rainfall, connected networks of water structures can retain water, limit flooding and thus reduce pressure on infrastructure. In addition, a good green-blue structure contributes to cooling the landscape and urban areas (through evaporation and shade) and can play a role in climate adaptation. This broader perspective of blue-green infrastructure is recognised in European studies as an integral part of sustainable planning.
National targets: 10% green-blue veining by 2050
Recent policy discussions in the Netherlands have mentioned an ambition to realise at least 10% of green-blue veining in the rural area by 2050, as formulated in the Landscape attack plan. This objective has several goals: improving biodiversity, increasing landscape quality, supporting sustainable agriculture, and climate adaptation. The plan explicitly looks at which linear elements in the landscape fit the characteristics of an area and how they can be sustainably managed.
This is not just about percentage area, but also about qualitative and functional aspects: the right landscape elements in the right place, proper distribution across the landscape and sufficient management to maintain ecological value.
How does green-blue interlacing differ from classic green infrastructure?
In international usage, one often sees the term green infrastructure or blue-green infrastructure in urban contexts. Those terms highlight a similar idea: using green and water in urban design for ecosystem services such as water management, air quality and liveability.
However, the Dutch concept of green-blue veining often places a stronger emphasis on the landscape as a whole, with cultural-historical and agricultural elements also playing a role and the scale typically being more regional-rural. This makes the concept relevant for planners, policymakers and managers working on integrated area development and ecological recovery.
From ambition to substantiated action
The ambitions around green-blue veining require more than vision alone: they require objective, reproducible and area-wide data. With the Green-blue vein analysis (GBDA) NEO's green-blue meanderings become measurable, comparable and administratively applicable. The analysis offers policymakers and area directors a solid data basis for environmental visions, monitoring, subsidy substantiation and strategic choices towards 2030 and 2050. It translates an abstract policy objective into concrete insights per area. Do you want to know how your area scores and where the biggest opportunities lie? Then a GBDA analysis is a logical first step.