Back to Search
Start Over
Factors dominating stratification cycle and seasonal water quality variation in a Korean estuarine reservoir
- Source :
- Journal of Environmental Monitoring. 12:1072
- Publication Year :
- 2010
- Publisher :
- Royal Society of Chemistry (RSC), 2010.
-
Abstract
- A comprehensive monitoring program was conducted during 2005-2007 to investigate seasonal variations of hydrologic stability and water quality in the Yeongsan Reservoir (YSR), located at the downstream end of the Yeongsan River, Korea. A principal component analysis (PCA) was performed to identify factors dominating the seasonal water quality variation from a large suite of measured data--11 physico-chemical parameters from 48 sampling sites. The results showed that three principal components explained approximately 62% of spatio-seasonal water quality variation, which are related to stratifications, pollutant loadings and resultant eutrophication, and the advective mixing process during the episodic rainfall-runoff events. A comparison was then made between YSR and an upstream freshwater reservoir (Damyang Reservoir, DYR) in the same river basin during an autumn season. It was found that the saline stratification and pollutant input from the upstream contributed to greater concentrations of nutrients and organic matter in YSR compared to DYR. In YSR, saline stratification in combination with thermal stratification was a dominant cause of the longer period (for two consecutive seasons) of hypoxic conditions at the reservoir bottom. The results presented here will help better understand the season- and geography-dependent characteristics of reservoir water quality in Asian Monsoon climate regions such as Korea.
- Subjects :
- Hydrology
Principal Component Analysis
geography
geography.geographical_feature_category
Public Health, Environmental and Occupational Health
Drainage basin
Stratification (water)
Fresh Water
Estuary
General Medicine
Eutrophication
Management, Monitoring, Policy and Law
Seasonality
medicine.disease
Monitoring program
Water Supply
Republic of Korea
medicine
Environmental science
East Asian Monsoon
Water Pollutants
Seasons
Water quality
Environmental Monitoring
Subjects
Details
- ISSN :
- 14640333 and 14640325
- Volume :
- 12
- Database :
- OpenAIRE
- Journal :
- Journal of Environmental Monitoring
- Accession number :
- edsair.doi.dedup.....eaedfef7712e60de24bd7b64a02647ef