Back to Search
Start Over
Factors affecting metal exchange between sediment and water in an estuarine reservoir: A spatial and seasonal observation
- Source :
- Journal of Environmental Monitoring. 11:2058
- Publication Year :
- 2009
- Publisher :
- Royal Society of Chemistry (RSC), 2009.
-
Abstract
- Water quality response in a reservoir has often been assessed using relatively restricted datasets that cannot provide sufficient information, thereby giving rise to a dramatic over- or underestimate of actual figures. In this paper we discuss how the levels of metallic elements between the sediment and overlying water in an estuarine reservoir can be influenced by aquatic parameters in response to spatial and seasonal conditions. To better elucidate the interfacial exchange between sediment and water, statistical analyses are employed to intensive data sets collected from the Yeongsan Reservoir (YSR), Korea, which has undergone widespread deterioration in water quality due to the continuous growth of anthropogenic sources. During three seasonal sampling campaigns, we found that oxygen deficiency at the bottom water layer promotes Fe and Ni accumulation in sediment, likely due to the formation of sulfide and oxide complexes under anoxic and suboxic environments, respectively. In addition, salinity levels as high as 11 per thousand in the bottom water layer during autumn substantially increase the release of Mn, restricting the use of YSR as a primary source of agricultural irrigation water. Although most dissolved metals are at acceptable levels for sustaining aquatic life, it is recommended that for long-term planning the elevated Fe and Mn levels in sediment should be controlled with oxygen deficiency during dry weather to ensure a sustainable water supply or, at a minimum, better coordinated operation of YSR.
- Subjects :
- Geologic Sediments
Iron
Water supply
Fresh Water
Management, Monitoring, Policy and Law
Bottom water
Water Supply
Anaerobiosis
Hydrology
Manganese
geography
Korea
geography.geographical_feature_category
business.industry
Aquatic ecosystem
Public Health, Environmental and Occupational Health
Sediment
Estuary
General Medicine
Anoxic waters
Oxygen
Salinity
Solubility
Environmental science
Seasons
Water quality
business
Water Pollutants, Chemical
Environmental Monitoring
Subjects
Details
- ISSN :
- 14640333 and 14640325
- Volume :
- 11
- Database :
- OpenAIRE
- Journal :
- Journal of Environmental Monitoring
- Accession number :
- edsair.doi.dedup.....7a0d28bd57477a39a36e191d22cee167