# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Working on NWRM requires understanding of a broad range of key concepts. This page gathers definitions for a set of key concepts used when addressing NWRM. It sets a shared ontology, with interlinkages between concepts. Semantic annotations have been developed and the associated ontology represented thanks to a relation graph.

Semantic Annotation helps to bridge the ambiguity of the natural language when expressing notions and their computational representation in a formal language. By telling a computer how data items are related and how these relations can be evaluated automatically, it becomes possible to process complex filter and search operations. (source:

Small-scale depressions used for storage and infiltration, typically at a property-level and close to buildings (e.g. to infiltrate roof drainage at a property level). - Based on Stella definitions, adapted by NWRM project experts and validated by... more
Collecting and storing rainwater for subsequent use ヨ for example, using water butts or larger storage tanks. - Based on Stella definitions, adapted by NWRM project experts and validated by the European Commission
From the perspective of natural water retention measures (NWRM), reconnection is the process of improving hydrological connection in the landscape, both through linking water bodies and through improving the connectivity between rivers and their... more
Conservation tillage leaves at least 30% of crop residue on the soil surface, or at least 1,100ᅠkg/ha of small grain residue on the surface during the critical soil erosion period. This slows water movement, which reduces the amount of soil erosion... more
Reduced stocking density will limit soil compaction, thereby facilitating more rapid infiltration during precipitation events and potentially reducing peak flows and sediment runoff. - Elaborated by NWRM project experts and validated by the... more
In the past, rivers have been straightened by cutting off meanders (historically, many rivers in northern and western Europe have been straightened and channelized to facilitate log floating and/or speed up the drainage of water and control/limit... more
A process of returning natural ecosystems or habitats to their original structure and species composition. Renaturation requires a detailed knowledge of the original species, ecosystem functions and interacting processes involved. (Source: GEMET,... more
Afforestation of reservoir catchments can have multiple benefits. It can reduce sediment inputs from the catchment, lengthening the life of the reservoir, and may also have beneficial effects on water quality in some cases when peatlands are... more
The cost linked the economic or relative scarcity of water once it is used.
Restoration is a management action or set of actions with the aim of restoring natural hydrologic functioning ᅠin the landscape. Restoration of natural functioning can contribute to an environmental balance in water management. NWRM implementation... more
Ponds or pools with additional storage capacity to attenuate surface runoff during rainfall events.ᅠ Retention time of runoff can provide the capacity to remove pollutants through sedimentation and opportunity for biological uptake of nutrients... more
In the past, rivers flows have been modified through channelisation, embankments or modification of river beds. Those modifications were aiming at flood prevention or supporting changes of agricultural practices for example. This has led to... more
Planting and maintaining tree cover in near-stream areas can have multiple benefits including erosion and nutrient leaching control. They will also slow the stream velocity during high flow flood events and may have beneficial effects on stream... more
1) Terrestrial areas where the vegetation complex and microclimate are products of the combined pressure and influence of perennial and/or intermittent water... and soils that exhibit some wetness characteristics. 2) Zone situated on the bank of a... more
The channel containing or formerly containing the water of a river. (Source: BJGEO)
The reconstitution of the alluvial mattress consists in leveling-up the river bed and/or reactivating the bank erosion in order to stop the incision of the river bed. It can allow better connection with side arms, level-up the water level at low... more
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