Details

Autor(en) / Beteiligte

• 신용식
• Yongsik Shin
• 유행선
• Haengsun Yu
• 이학영
• Hakyoung Lee
• 이다혜
• Dahye Lee
• 박건우
• Gunwoo Park

Titel

보건설에 따른 영산강의 조류 발생 및 환경 변화: 수질측정망 장기 자료 분석

Ist Teil von

• 생태와 환경, 2015-12, Vol.48 (4), p.238

Ort / Verlag

한국하천호수학회

Erscheinungsjahr

2015

Quelle

EZB-FREE-00999 freely available EZB journals

Beschreibungen/Notizen

• The effect of weir construction (2009~2011) was investigated on algal bloom dynamics and surrounding conditions in the Youngsan River by analyzing the long-term (2001~2014) data provided by the Water Information System, Ministry of Environment. The data include chlorophyll a and water properties such as total suspended solids (TSS), ammonium (NH4 +), nitrate (NO3-), orthophosphate (PO43-), total nitrogen (TN), total phosphorus (TP) and DIN/DIP molar ratio collected from 12 stations along the channel of the river. Temporal variations were examined using data collected monthly from 2001~2014 and Box-Whisker plot was used to examine the difference in algal bloom dynamics between before (2006~2008) and after (2012~2014) the weir construction. Pearson``s correlation analysis was also used to analyze the correlation of parameters. The results showed that TSS affecting water turbidity increased during the construction but decreased especially at the stations located in the upper and middle regions of the river after the construction. Ammonium concentrations increased whereas the concentrations of other nutrients decreased after the construction inducing an increase in N:P molar ratio. Chlorophyll a decreased suddenly during the construction but increased clearly after the construction at the stations where TSS decreased. This indicates that algal blooms can develop in the Youngsan River due to a decrease in turbidity that increases light penetration in water column although the concentrations of nutrients such as orthophosphate were reduced after the weir construction.