Uitgestelde effecten van infiltratie van voorgezuiverd rivierwater in duinen op ecologie en drinkwaterkwaliteit
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Series / Report no.
Open Access
Type
Report
Language
nl
Date
1996-03-31
Research Projects
Organizational Units
Journal Issue
Title
Uitgestelde effecten van infiltratie van
voorgezuiverd rivierwater in duinen op ecologie en
drinkwaterkwaliteit
Translated Title
Delayed effects of artificial groundwater recharge
of pretreated river water on drinking water quality and dune
ecology
Published in
Abstract
De resultaten van deze studie naar de mogelijke
negatieve gevolgen van de infiltratie van rivierwater in de Nederlandse
duinen voor de drinkwaterkwaliteit en duinecologie wijzen er op dat de
grootste bedreiging voor de ecologie de belasting van de duinen met
nutrienten, (fosfaat, nitraat en ammonia) is. De beheersing van de
nutrientenrijkdom in de door de infiltratie beinvloede duingebieden kan
waarschijnlijk door de toepassing van de inrichtings- en beheersmaatregelen
bereikt worden. De accumulatie van sporenelementen in de ondergrond onder
infiltratiemiddelen is vrij beperkt. De gegevens over de omvang van de
verontreiniging van water en ondergrond in natte duinvalleien met
sporenelementen zijn echter schaars en nader onderzoek is noodzakelijk. De
informatie over accumulatie van organische microverontreinigingen is
onvoldoende om de accumulatie betrouwbaar te kwantificeren. Niettemin
bestaan er geen aanwijzingen van een ernstige accumulatie van organische
microverontreinigigen als gevolg van de infiltratie.
The study on the risks of the artificial groundwater recharge of pretreated river water in the dune area for drinking water quality and dune ecology suggests, that the most serious ecological consequence of the recharge is the eutrophication by phosphate and nitrate. An effective control of eutrophication can be achieved by additional ecological management measures. Accumulation of the suspended matter and heavy metals taking place in the upper layers of the underground beneath the recharge surfaces does not pose a serious threat. Information on the pollution of moist dune slacks by trace elements is however scarce and further study is needed. The risks related to accumulation of organic pollutants could not be properly evaluated due to the lack of reliable data. Nevertheless there exists no indication of a serious accumulation of organic micropollutants in the underground related to the recharge.
The study on the risks of the artificial groundwater recharge of pretreated river water in the dune area for drinking water quality and dune ecology suggests, that the most serious ecological consequence of the recharge is the eutrophication by phosphate and nitrate. An effective control of eutrophication can be achieved by additional ecological management measures. Accumulation of the suspended matter and heavy metals taking place in the upper layers of the underground beneath the recharge surfaces does not pose a serious threat. Information on the pollution of moist dune slacks by trace elements is however scarce and further study is needed. The risks related to accumulation of organic pollutants could not be properly evaluated due to the lack of reliable data. Nevertheless there exists no indication of a serious accumulation of organic micropollutants in the underground related to the recharge.
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DGM/DWL