Estimation of Long-Term Changes of Seagrass Habitat in the Korean Coastal Waters Using Multi-Remotely Sensed Data

Title
Estimation of Long-Term Changes of Seagrass Habitat in the Korean Coastal Waters Using Multi-Remotely Sensed Data
Author(s)
김근용; 최종국; 유주형
KIOST Author(s)
Kim, Keunyong(김근용)Choi, Jong Kuk(최종국)Ryu, Joo Hyung(유주형)
Publication Year
2019-12-12
Abstract
Seagrass beds plays important roles, not only providing food and habitat for various animals but also leading nutrients and carbon cycle in coastal ecosystem. Despite the importance of seagrass beds, studies of seagrass distribution in Korea, have been conducted by direct sampling method in limited depth and area. Recently, remote sensing is considered to be very effective tool to detecting wide-scales habitat. In this study, multi-satellite data were used for detecting seagrass beds in turbid waters and describing temporal changes over the past two decades. All seagrass spectra from different sensors (Landsat TM/ETM+, Aster, Spot-4, and Kompsat-2) have low reflectance in green and high in NIR band, whereas bare seawater showed opposite spectrum features. A training area in the green band and Mahalanobis Distance Classification (MDC) algorithm was adopted for classification and mapping of seagrass beds. Based on the underwater acoustic referencedata, overall accuracy of error matrix for Kompsat-2 image classification was 73% accurate. Despite the high turbidity seawater, this accuracy is considered relatively high precision. The average area of seagrass beds was 4.6 km2 from 1990to 2017, and it was consistently >4.0 km2. Seagrass beds are often inaccurately detected when using different spatial resolutions and turbid water, but the MDC method will be appropriate for turbid water of Korean coast.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/21028
Bibliographic Citation
American Geophysical Union, pp.1, 2019
Publisher
American Geophysical Union
Type
Conference
Language
English
Publisher
American Geophysical Union
Related Researcher
Research Interests

Coastal Remote Sensing,RS based Marine Surveillance System,GOCI Series Operation,연안 원격탐사,원격탐사기반 해양감시,천리안해양관측위성 운영

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