Author(s): Takashi Hoshino; Tatsuya Hirosako; Taichi Harada; Atsuko Nonomura; Yoshihiro Suenaga; Kaori Yasuoka; Wataru Shiraki
Linked Author(s):
Keywords: Quaculture; Remote sensing fusion system; Chlorophyll-a; Semi-enclosed bay
Abstract: Shido Bay is the one of the representative semi-enclosed bay, Seto-Inland Sea, Japan. There are many spawning and nursery grounds of valuable marine resources. But recently, variable marine environmental problems have been caused by red tide, severe gather up sand resources and the increase to the pollutional load with urbanization of the coastal area. Therefore, the activities carried on the land area often widely affect the marine condition from coastal to offshore area. We’ve conducted the field experiments, it was found that the tidal current, horizontal and vertical distribution of water density, chlorophyll-a concentration, bottom topography, biological condition and dissolved oxygen consumption rate by sediment are important factors to evaluate the characteristics of fishery grounds. The authors propose a more appropriate system for evaluate to the distribution of the chlorophyll-a by combining three kinds of technology, remote sensing, 3-dimensional numerical model, and geographic information system, namely fusion system. 3-dimensional numerical model predicts the spatial distribution of the chlorophyll-a at every moment. Remote sensing provides the distribution of chlorophyll-a to this model as an initial condition all over the study area. Also, authors assess the calculated results of numerical model and discuss the suitability of the bay as fish farm with referencing other data, for example topography, tidal residual current etc., on GIS system. We can say that this fusion system is necessary to do decision making for managing fish farm and keeping sound marine environment.
Year: 2005