부산대학교 도서관

Total Suspended Matter (TSM) concentration in nearshore waters plays a very important role to the coastal water quality management, oceanic primary production and coral reef conservation. However, traditional approach provides limited information in terms of spatial and temporal coverage for monitoring TSM concentration in nearshore waters. The MODerate resolution Imaging Spectroradiometers (MODIS) on board Terra and Aqua satellite can provide abundant spectral information for rigorous atmospheric correction and retrieving TSM concentrations from the observation of ocean color in a large scale (250 m resolution). With the advantage of daily-revisit characteristics of Formosat-2 satellite (FS-2), the Remote Sensing Instrument (RSI) onboard FS-2 provide high-tempospatial data (8 m resolution), however, insufficient spectral information to resolve the water color. With an intention to well understand the dynamic and spatial patterns of TSM concentration in the Goaping river, this study presents a multi-satellite sensor approach that integrate both the advantage of MODIS and RSI to generate high resolution map of TSM concentration on FS-2 imagery. Firstly, a 250m resolution TSM regression model named MODIS-GP-TSM was established using MODIS Band 1 reflectance and concurrent TSM concentration measured at Gaoping River mouth. Secondly, with the TSM data derived from two MODIS images and MODIS-GP-TSM, an 8m resolution TSM retrieval model named FS2-GP-TSM was developed on the corresponding FS-2 images. The FS2-GP-TSM was verified to another set of field data taken from the river mouth to Lamey Island, with a good agreement between derived and observed TSM concentrations. This study encourages the use of multi-satellite approaches to extend the application of the FS-2 imagery on monitoring costal and nearshore waters where high resolution information is required.