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Hydrographical network: rivers, lakes Representation of all main hydrographic elements, both natural and artificial: Rivers, lakes, transitional waters, reservoirs, channels. Is one of the basic components for cartographic presentation and used by nearly all GIS users at all levels. Links to WFD classes: surface fresh water bodies, rivers lakes. Is being used in environmental assessment and monitoring in estimation of water resources, pollution monitoring, wastewater cleaning estimation, species migration and biodiversity assessment, the hydrological elements being habitats. Inland fisheries management. Hazardous waste disposal sites. Land use planning/ management, recreation planning and management, transport routes. Assessment of flow patters of particles and pollutants must be based on high quality hydrographical networks. |
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Water catchments: Synonymous with river basins. As defined in WFD: art 2, annex I, ii): River basin means the area of land from which all surface run-off flows through a sequence of streams, rivers and, possibly, lakes into the sea at a single river mouth, estuary or delta. Sub-basin means the area of land from which all surface run-off flows through a series of streams, rivers and, possibly, lakes to a particular point in a water course (normally a lake or a river confluence) Is used in assessment of water flow and flooding, flow of contaminants, erosion monitoring. Catchments are used to create WFD River Basin Management Districts, but does not have full correspondence in boundaries. |
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Groundwater bodies/aquifers: Groundwater aquifers are areas with significant amounts of groundwater, for human consumption or anthropogenic production. Knowledge about groundwater aquifers is essential when managing areas of multi-purpose, use and where pollution/hazards, in order to secure quality water sources. WFD is requesting data and reporting about groundwater body situation (impact/pressure) (WFD attributes: annex V – 2.5, VII – 4.2 Member States shall provide in the river basin management plan a map showing for each groundwater body or groups of groundwater bodies….) |
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