The effects of seawater exchange on the structure of water quality in enclosed bay

Sato Hironobu, Takahashi Kenya, Kashiwadate Nobuko, Nomura Munehiro, Sawamoto Masaki

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

Abstract

In enclosed bay, water quality may change abruptly because high density outer seawater intrudes into the bay. To investigate the effect of seawater exchange on chlorophyll-a (chl.a) concentration in the bay, time series distribution of water quality were measured in Ohfunato bay in northern part in Japan. During the observation, abrupt change of chl.a concentration was observed although weather did not change clearly. Next, in order to investigate relationship between seawater exchange and chl.a variation, an ecological model was developed in the bay. Results of simulation showed that estimated chl.a concentration agreed with the observed value partially. From these results, it is concluded that seawater exchange is not always only improving but also impair the water quality in inner bay.

Original languageEnglish
Title of host publication31st IAHR Congress 2005
Subtitle of host publicationWater Engineering for the Future, Choices and Challenges
EditorsJun Byong-Ho, Il Lee Sang, Seo Il Won, Choi Gye-Woon
PublisherKorea Water Resources Association
Pages3985-3991
Number of pages7
ISBN (Electronic)8987898245, 9788987898247
Publication statusPublished - 2005
Event31st IAHR Congress 2005: Water Engineering for the Future, Choices and Challenges - Seoul, Korea, Republic of
Duration: 2005 Sep 112005 Sep 16

Publication series

Name31st IAHR Congress 2005: Water Engineering for the Future, Choices and Challenges

Conference

Conference31st IAHR Congress 2005: Water Engineering for the Future, Choices and Challenges
Country/TerritoryKorea, Republic of
CitySeoul
Period05/9/1105/9/16

Keywords

  • Chlorophyll-a
  • Density variation
  • Ecological model
  • Seawater exchange
  • Stratification

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Environmental Science (miscellaneous)
  • Water Science and Technology

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