CONTINUOUS ELECTRODE MEASUREMENT OF TIDAL FLAT ENVIRONMENT FLUCTUATED BY UPWELLING SEAWATER

Abstract

 The tidal flat is subjected to tidal intrusion of seawater with spatially and temporally different characteristics. The bottom water that flows up to the tidal flats contains a variety of suspended and dissolved organic matter, which may have a significant impact on the tidal flat environment. The oxidation-reduction potential (ORP) indicates the potential for redox reactions between dissolved ions and suspended solids electrodes in seawater. It thus provides an indicator for estimating the impact of redox substances on the tidal flat environment. In contrast, ORP sensors using sensitive membranes are not suitable for continuous measurement in the field environment where organisms inhabit. This paper aims to develop an ORP sensor to measure the effect of upwelling water on the tidal flat environment and to understand the electrode reaction characteristics to enable the development of a device that can measure changes in the tidal flat environment in response to upwelling water.