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Inoue, Takanobu
Toyohashi University of Technology, Departments of Architecture and Civil Engineering, 1-1 Hibarigaoka, Tenpaku-cho, Toyohashi, Aichi 441-8580,
Engineering

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Effect of Nutrient Inputs on Water Quality Change and Phytoplankton Growth in Atsumi Bay Mahlil, Teuku; Inoue, Takanobu; Matsumoto, Yoshitaka; Aoki, Shinichi; Kato, Shigeru; Yokota, Kuriko; Rasul, Ernawaty; Saga, Makoto
Journal of Engineering and Technological Sciences Vol 50, No 4 (2018)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1028.082 KB) | DOI: 10.5614/j.eng.technol.sci.2018.50.4.7

Abstract

Eutrophication in an estuary occurs as an effect of the enrichment of nutrient inputs from rivers. This condition has become one of the most common environmental issues experienced around the globe and especially in Japan. Atsumi Bay is a eutrophic coastal area in Japan. The objective of this research was to analyze the influences of nutrient inputs from the Umeda River into Atsumi Bay on pre- and post-rainfall water quality conditions. This study was conducted from July to October 2010. The results showed a decrease of surface salinity after rainfall indicating that huge freshwater inputs had overlaid the surface layer of Atsumi Bay rather than the bottom layer. Moreover, post-rainfall conditions showed an increase of chlorophyll a as an effect of phytoplankton growth, followed by an increase of particulate nutrients. On the other hand, dissolved nutrients decreased due to uptake by phytoplankton and dilution by freshwater.
Co-Authors Aoki, Shinichi Kato, Shigeru Mahlil, Teuku Matsumoto, Yoshitaka Rasul, Ernawaty Saga, Makoto Yokota, Kuriko