녹조 발생 수역에서 식물성 플랑크톤의 출현양상 및 광학적 특성

Occurrence Patterns and Optical Properties of Phytoplankton in Algal Bloom

The purpose of this study is to improve the water quality of river management ability by measuring water quality and reflectance in areas where algal bloom occur. The study obtained field data on the Dodong dock of Nakdong River on July 29th 2015, where algal bloom occurs frequently. Using spectrometer from green algal bloom occurred waters and obtained the reflectance of the algal bloom and clear water. Also, the researcher conducted field investigation and quantity analysis of 18 sites. In the investigated area, species composition of phytoplankton emerged in the investigated water showed to be 16 species of 5 classification group. Cyanophyceae and Chlorophyceae are dominant in study area. Among the Cyanophyceae, Microcystis sp. and Anabaena sp. appeared as dominant species. Optical characteristics of green algal bloom and clear water showed a different pattern at NIR band. In the case of clear water, while a constant reflectance, green algal bloom water showed 0.7 or more reflectance at NIR band. These field spectral data can be used for remote sensing of detect algal bloom.