Low-Salinity Water Masses in Summer and the Change of Tidal Current by Past Coastline Transition in the Yatsushiro Sea

Akira TAI, Shinichiro YANO, Akihide TADA, Yuji KAMIKUBO, Kohei YANO, Tomonori SAITA, Akihiro HASHIMOTO, Takuya ISHIHARA
2011 Journal of Japan Society of Civil Engineers Ser B2 (Coastal Engineering)  
In recent years, marine products industry has been damaged seriously by red tide in the Yatsushiro Sea.Furthermore, the coastline of the Yatsushiro Sea has been changed by land reclamation is the case in the Ariake Sea. In this research, we tried to reveal the behavior of low-salinity water masses in summer season and the shift of physical fields triggered by the change of coastline. As a result, the followings were clarified: 1) In case of large discharge such as over 1,000m 3 /s from Kuma
more » ... 3 /s from Kuma River is happened, surface layer's salinity across the Yatsushiro Sea falls to a low level; 2) The change of coastline caused by land reclamation from1900s to 2000s, so that 30% decrease of tidal current in closed-off section and 10% decrease of tidal current in the southern part of the Yatsushiro Sea are caused.
doi:10.2208/kaigan.67.i_341 fatcat:rd2lhsx73je57eqyl2h3t4ovsa