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- W1499522134 abstract "The EU Water Framework Directive (WFD) requires that those rivers and lakes that aredependent on groundwater be identified and the pressures on these analysed such that the risk ofnot meeting their environmental objectives by 2015, as set out in Article 4, can be assessed. Thisreport describes the methodology for identifying and carrying out risk assessments forgroundwater-dependent rivers and lakes in Northern Ireland, as part of the initial characterisationprocess. The methodology reflects UK Technical Advisory Group (UKTAG) guidance.The report details those river water bodies and lakes that are groundwater dependent andassesses which of these are at risk of being significantly damaged as a result of groundwaterabstractions and potentially polluting point sources; diffuse pollution is addressed elsewhere.The report does not address quantitative impacts on rivers and lakes from groundwaterabstractions outside specified assessment zones; the study addressed localised impacts ratherthan those due to cumulative groundwater abstractions which affect the overall groundwaterbody water balance, and the ‘available groundwater resource’. This is reported elsewhere.The risk assessment for lakes has been restricted to those with an area greater than 50 hectares,these being the reporting units agreed for the UK for initial characterisation. Lough Neagh andUpper and Lower Lough Erne, whilst obviously falling within this category due to theirsignificant scale, are reported elsewhere.Of the 673 river water bodies considered, 564 are classified as groundwater dependent. Of the17 lakes assessed, 10 are classified as groundwater dependent.None of the groundwater-dependent lakes are assessed as being affected by groundwaterabstractions. Flows in four river water bodies are possibly at local risk due to groundwaterabstractions, and one, the Breckagh Burn, is probably at risk.All groundwater-dependent lakes have been classified as risk category 2b in relation topotentially polluting point sources. Using an approach that assesses the equivalent categories forriver water bodies based on the sum of the number of sources within the surrounding assessmentzones, regardless of type, 113 river water bodies were classified as risk category 2a and theremainder risk category 2b.The report details data limitations and gaps in knowledge affecting the initial characterisationprocess used." @default.
- W1499522134 created "2016-06-24" @default.
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- W1499522134 date "2005-01-01" @default.
- W1499522134 modified "2023-09-23" @default.
- W1499522134 title "EU Water Framework Directive : groundwater-dependent rivers and lakes in Northern Ireland" @default.
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