Mapping Sargassum beds off, ChonBuri Province, Thailand, using ALOS AVNIR2 image

Thidarat Noiraksar; Teruhisa Komatsu; Shuhei Sawayama; Sophany Phauk; Ken-ichi Hayashizaki

doi:10.1117/12.979704

21 November 2012 Mapping Sargassum beds off, ChonBuri Province, Thailand, using ALOS AVNI2 image

Thidarat Noiraksar, Teruhisa Komatsu, Shuhei Sawayama, Sophany Phauk, Ken-ichi Hayashizaki

Proceedings Volume 8524, Land Surface Remote Sensing; 85241F (2012) https://doi.org/10.1117/12.979704
Event: SPIE Asia-Pacific Remote Sensing, 2012, Kyoto, Japan

Abstract

Sargassum species grow on rocks and dead corals and form dense seaweed beds. Sargassum beds play ecological roles such as CO2 uptake and O2 production through photosynthesis, spawning and nursery grounds of fish, feeding ground for sea urchins and abalones, and substrates for attached animals and plants on leaves and holdfasts. However, increasing human impacts and climate change decrease or degrade Sargassum beds in ASEAN countries. It is necessary to grasp present spatial distributions of this habitat. Thailand, especially its coastal zone along the Gulf of Thailand, is facing degradation of Sargassum beds due to increase in industries and population. JAXA launched non-commercial satellite, ALOS, providing multiband images with ultra-high spatial resolution optical sensors (10 m), AVNIR2. Unfortunately, ALOS has terminated its mission in April 2011. However, JAXA has archived ALOS AVNIR2 images over the world. They are still useful for mapping coastal ecosystems. We examined capability of remote sensing with ALOS AVNIR2 to map Sargassum beds in waters off Sattahip protected area as a natural park in Chon Buri Province, Thailand, threatened by degradation of water quality due to above-mentioned impacts. Ground truth data were obtained in February 2012 by using continual pictures taken by manta tow. Supervised classification could detect Sargassum beds off Sattahip at about 70% user accuracy. It is estimated that error is caused by mixel effect of bottom substrates in a pixel with 10 x 10 m. Our results indicate that ALOS AVNIR2 images are useful for mapping Sargassum beds in Southeast Asia.

Citation Download Citation

Thidarat Noiraksar, Teruhisa Komatsu, Shuhei Sawayama, Sophany Phauk, and Ken-ichi Hayashizaki "Mapping Sargassum beds off, ChonBuri Province, Thailand, using ALOS AVNI2 image", Proc. SPIE 8524, Land Surface Remote Sensing, 85241F (21 November 2012); https://doi.org/10.1117/12.979704

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
10 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Water

Satellites

Satellite imaging

Earth observing sensors

Ecosystems

Remote sensing

Carbon dioxide

Show All Keywords

Keywords/Phrases

Search In:

Publication Years