MEASUREMENT OF SEAGRASS DISTRIBUTION BY SATELLITE DATA AND VARIDATION USING DISSOLVED INORGANIC CARBON IN LAGOON

Abstract

 Seagrass distribution in a lagoon located near the Sea of Okhotsk was estimated from satellite data, and varidated using DIC and its variation obtained by field observation data. Seagrass distribution was made by converted data from averaged NDVI of satellite Sentinel-2 to seagrass vegetation density. As a result of calculation of DIC model, since field observation data at 17 points in/out of seagrass vegetation area for a period of from July to August in 2018 were successfully represented, seagrass distribution using satellite NDVI was well verified. Bias of calculation results were appeared due to seagrass existence, however, the estimation insufficiency of vegetation under the water and the influence of hydraulic resistance of seagrass to tidal current and water quality were likely associated.