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dc.contributor.authorKurashina, Shoji
dc.contributor.authorHishida, Masataka
dc.contributor.authorUeno, Yoshizo
dc.contributor.authorImoto, Taiji
dc.date.accessioned2020-02-16T15:44:57Z
dc.date.available2020-02-16T15:44:57Z
dc.date.issued1979
dc.identifier.urihttp://hdl.handle.net/1834/16306
dc.description.abstractSince the environment of the sea in the coastal regions has been changing with the rapid and large scale development of nearby industrial areas, the actual condition of the sea has begun to attract public attention, because of its nutritious chemical substances. The Consecutive-Automatic Analyzer(C.A.A.) was devised to analyze the components of the dissolved phosphates, as an indication of the conditions of marine ecology and pollution. It is designed to operate automatically in accordance with a preset schedule, such as engine start, pre-calibration, measurements, post-calibration, water conduit cleaning, engine stop and repeat. Observation was carried out from November 9 to December 10 1976 and from August 22 1977 to February 11 1978, by installing the C.A.A. on an unmanned catamaran bouy anchored off Yokosuka. A salinometer, a thermister thermometer and a current meter were also fixed to the bouy. Sample water for the C.A.A. was pumped up every four hours from depths of 0 m and 10 m. The other measurement devices were submerged to a depth of 12 m. The results of observation shows that the phosphate concentration depended strongly on the river discharge in the western part of Tokyo Bay. In general the phosphate concentration increased to the shoreward, and became temporarily greater after rain fall in the hinterlands. Concerning vertical distribution, the observed value of the phosphate concentration in the 10 m-layer was higher than that of the surface layer during the summer and early autumn. After late autumn the concentration in the 10 m-layer became similar to that of the surface layer due to the disappearance of the seasonal thermocline. The phosphate concentration seems to be inversely interrelated with the salinity. An interrelation between phosphate concentration and tidal current could not be definitely concluded due to the complication of the current in shallow water. From the results obtained we can say that a continuous measurement of a nutritious chemical substance, such as phosphate, is useful for monitoring the quality of the water and detecting future trends.en_US
dc.language.isojaen_US
dc.relation.urihttps://www1.kaiho.mlit.go.jp/GIJUTSUKOKUSAI/KENKYU/report/rhr14/rhr14-02.pdfen_US
dc.titleAn investigation of the coastal environment with a consecutive-automatic analyzer(C.A.A).en_US
dc.typeJournal Contributionen_US
dc.bibliographicCitation.issue14en_US
dc.bibliographicCitation.titleReport of Hydrographic and Oceanographic Researchesen_US
dc.description.statusPublisheden_US
dc.format.pagerangepp.39-48en_US
dc.type.refereedRefereeden_US
refterms.dateFOA2021-01-30T18:48:37Z


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