DOI QR코드

DOI QR Code

인공호소인 영산호의 용존산소 분포와 수층 성층구조의 연관성 분석

송은숙;조기안;신용식
Song, Eun-Sook;Cho, Ki-An;Shin, Yong-Sik

  • 투고 : 2014.10.24
  • 심사 : 2015.01.14
  • 발행 : 2015.02.27

초록

The Youngsan Lake was constructed to supply agricultural water to the extensive rice fields in the basin of the lake in 1981. Hypoxia has often developed in the bottom water of the lake during the warm season although the water depth is relatively shallow (< 16 m). We investigated the spatial and temporal variations of dissolved oxygen (DO) and physical properties such as water temperature, salinity and turbidity to elucidate the effects of change in physical properties on DO dynamics in the lake. Vertical profiles of DO, temperature, salinity, and water density were also explored to verify the development of stratification in relation to DO variation in the water column. Hypoxia (DO < $2mg\;L^{-1}$) was not observed in the upper regions whereas hypoxia was detected in the lower regions during the warm season. Thermocline generally developed in the lower regions during the warm season unlike the previous studies in which no thermocline was observed. However, water column was well mixed when freshwater water was discharged from the reservoir through the sluice gate of the dike. DO concentrations also decreased when halocline or pycnocline developed during the dry season suggesting that the vertical stratification of water column affects DO dynamics although the water depth is shallow in the Youngsan lake.

키워드

Dissolved oxygen (DO);Hypoxia;Temperature;Salinity;Stratification;Youngsan Lake

참고문헌

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피인용 문헌

  1. Laboratory Study of Phosphorus Fractionation in the Sediments of Yeongsan River vol.39, pp.9, 2017, https://doi.org/10.4491/KSEE.2017.39.9.519

과제정보

연구 과제 주관 기관 : 한국연구재단