TIDAL DYNAMICS OF WATER QUALITY AND MATERIAL FLUX IN THE FUKIDO MANGROVE RIVER: DATA FROM THE LAST DECADE OF FIELD OBSERVATIONS

Abstract

 Multiple measurements of vertical distributions of water qualities (water temperature, salinity, DO and turbidity) and nutrients (NH_4-N, NO_3-N, PO_4-P, TN and TP) were made in the Fukido mangrove river, in Ishigaki island, Japan, from 2007 to 2018. The river currents and nutrients in the groundwater were also measured on a section across the river mouth. Concentrations of NH_4-N and PO_4-P in the groundwater were 16-18 times higher than in the river water. Net SS and TN fluxes for the rainy day (87 mm/day) were about 3.8 times higher than in the other ordinary day.