Characteristics of Water Quality at Main Streams and Lake Doam in Daegwallyeong Area

Abstract

This study was surveyed that water physiochemical characteristics and phytoplankton incidence of main stream and Lake Doam near to Daegwallyeong agricultural area. Based on above results, it was conducted to get information overall water characteristics in south Han upstream river. COD value of Lake Doam was 6.1 mg L -1 and T-P (Total phosphorous) from there was 0.26 mg L -1 which was higher than the value of grade Ⅵ based on lake water living environment standard. Suspended solid was an average of 9.77 NTU which was higher than value of lake living standard. Concentration of phytoplankton was over 2.0×10 3 Cell mL -1 from July to September. It was considered that cyanobacteria were occurred due to massive influx of nutrient material by high temperature and rainfall during this season. Compare to Ontario's sediment quality guidelines, T-N and T-P was middle value between LEL and SEL in Lake Doam. This value means that contamination in water is serious. Therefore, it is considered that systematic management was needed to reduce and block contamination source.

Investigating Nonpoint Source and Pollutant Reduction Effects under Future Climate Scenarios: A SWAT-Based Study in a Highland Agricultural Watershed in Korea

“…Over the past two decades, the Doam-dam watershed has seen a significant reduction in observed discharges due to both anthropogenic activities and the effects of climate change. The rise in temperature and decrease in surface water by 25-45% in Korea have posed serious threats to water supplies and environmental sustainability [23]. Several studies have focused on pollutant changes and improving water quality in Doam Lake [6,24,25], but only a few have looked at the impact of climate change on streamflow for the watershed scale.…”

Assessment of water quality variations under non-rainy and rainy conditions by principal component analysis techniques in Lake Doam watershed, Korea

“…And the use of chemical fertilizers and livestock manure is a great concern of non-point source pollutant discharge, as it deteriorates the ecology and environment of water bodies (Shin 2004, Heo et al 2006, Heo et al 2007). Park et al (2012) demonstrated that contamination in the water of Lake Doam and watershed streams was serious. Soil conservation to reduce SS and appropriate management are needed in the Lake Doam watershed to improve the water quality during wet weather conditions ).…”