Water quality monitoring and modeling in lagoon Jusan, Japan

M. Umeda, H. Tanaka, H. Higuchi, M. Sasaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Lagoon Jusan is located in Northern part of the Japan main island. The lagoon is famous countrywide for catches of a bivalve, Corbicula japonica, and for its taste. However, the catches of the bivalve have been decreasing in recent years. One of the possible factors is influence from changing aquatic environment in and around the lagoon. In this study, continuous monitoring of salinity, dissolved oxygen and chlorophylla using auto-recording device was conducted during a summer season, when growth and spawning of the bivalve are the most active. The results of the monitoring and other measurements show that the water in the lagoon is generally rich in nutrients, organic matter and growth of phytoplankton, and that dissolved oxygen concentration sometimes declines. Numerical simulations were also conducted to understand spatial and temporal structure of water quality. The model applied in this study had a vertical 1-dimensional assumption. The results revealed that the stagnant water body tends to develop in the middle layer of the lagoon, even though the lagoon is quite shallow. This phenomenon promotes growth of phytoplankton.

Original languageEnglish
Title of host publicationEnvironmental Hydraulics - Proceedings of the 6th International Symposium on Environmental Hydraulics
PublisherTaylor and Francis - Balkema
Pages517-522
Number of pages6
ISBN (Print)9780415595452
DOIs
Publication statusPublished - 2010
Event6th International Symposium on Environmental Hydraulics - Athens, Greece
Duration: 2010 Jun 232010 Jun 25

Publication series

NameEnvironmental Hydraulics - Proceedings of the 6th International Symposium on Environmental Hydraulics
Volume1

Other

Other6th International Symposium on Environmental Hydraulics
CountryGreece
CityAthens
Period10/6/2310/6/25

ASJC Scopus subject areas

  • Environmental Chemistry

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