TITLE:
Estimation of Growth Area of Aquatic Macrophytes Expanding Spontaneously in Lake Shinji Using ASTER Data
AUTHORS:
Yuji Sakuno, Hidenobu Kunii
KEYWORDS:
ASTER; NDVI; Aquatic Macrophytes; Bio-Optical Algorithm; Lake Shinji
JOURNAL NAME:
International Journal of Geosciences,
Vol.4 No.6A,
August
8,
2013
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.