Abstract
In this study, we estimated the growth area of aquatic macrophytes that have expanded spontaneously in Lake Shinji, located in eastern Shimane Prefecture, Japan, using Terra satellite Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data. Visible and near infrared ASTER data from April, August, and September 2012 were used. The water depth at which ASTER can detect submersed aquatic macrophytes using in situ spectral reflectance of aquatic macrophytes and a bio-optical model was also examined. As a result, when the threshold value of a normalized difference vegetation index (NDVI) was set to 0, only aquatic macrophytes up to a depth of approximately 10 cm could be detected. The growth area of aquatic macrophytes detected by NDVI from ASTER data was in relatively good agreement with the growth area as observed by aerial photography.
Highlights
Lake Shinji is a brackish water lake with rich biological resources primarily represented by corbicula
This study aims to estimate the spontaneously expanded growth area of aquatic macrophytes in the lake using Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data from the Terra satellite
The aquatic macrophyte distribution in the lake can be roughly seen from ASTER data in Figures 3-6, it appears that detection sensitivity changes with species (Potamogeton anguillanus and Cladophora sp.)
Summary
Lake Shinji is a brackish water lake with rich biological resources primarily represented by corbicula. An abrupt increase in blue-green algae and the spontaneous expansion of aquatic macrophytes have been observed within the lake. The influence of such events on the biological resources of the lake is unknown. It is difficult to ascertain the actual conditions of such a wide area. It is expected that satellite remote sensing technology rather than conventional field survey can be employed to obtain the required data. This study aims to estimate the spontaneously expanded growth area of aquatic macrophytes in the lake using Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data from the Terra satellite
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
