TY - JOUR
T1 - Coastal and marine ecological changes and fish cage culture development in Phu Quoc, Vietnam (2001 to 2011)
AU - Nguyen, Diep Thi Hong
AU - Tripathi, Nitin Kumar
AU - Gallardo, Wenresti G.
AU - Tipdecho, Taravudh
PY - 2014/7
Y1 - 2014/7
N2 - This study employed image enhancement for LANDSAT TM and ALOS imagery to monitor the changing status of coastal resources from 2001 to 2011, object-based classification of high-resolution THEOS imagery to extract fish cage culture sites and interpolation methods to determine marine environmental quality in 2011 in the northern part of Phu Quoc Island. There were five classes in the study site: natural forest, Melaleuca forest, agriculture, peat and built-up areas. Agricultural land and Melaleuca forest changing into built-up areas constituted approximately 51.13% of the total area changing. The benthic seagrass habitat increased dramatically from 2001 to the end of 2010. Besides, marine culture has been concerned to cage culture which is one of the sources directly affecting aquatic life and water quality in coastal environment. Cage culture locations were detected using high-resolution imagery as THEOS data for image fusion and Object-based Image Analysis methods. Water quality criteria including nitrogen, phosphorus and chlorophyll-a concentrations were determined by interpolation method, and the spatial distribution of these parameters showed a concentration in the study area in the range from 0.17 to 0.49 mg/L, 0.012 to 0.073 mg/L and 0.26 to 1.046 μg/L, respectively.
AB - This study employed image enhancement for LANDSAT TM and ALOS imagery to monitor the changing status of coastal resources from 2001 to 2011, object-based classification of high-resolution THEOS imagery to extract fish cage culture sites and interpolation methods to determine marine environmental quality in 2011 in the northern part of Phu Quoc Island. There were five classes in the study site: natural forest, Melaleuca forest, agriculture, peat and built-up areas. Agricultural land and Melaleuca forest changing into built-up areas constituted approximately 51.13% of the total area changing. The benthic seagrass habitat increased dramatically from 2001 to the end of 2010. Besides, marine culture has been concerned to cage culture which is one of the sources directly affecting aquatic life and water quality in coastal environment. Cage culture locations were detected using high-resolution imagery as THEOS data for image fusion and Object-based Image Analysis methods. Water quality criteria including nitrogen, phosphorus and chlorophyll-a concentrations were determined by interpolation method, and the spatial distribution of these parameters showed a concentration in the study area in the range from 0.17 to 0.49 mg/L, 0.012 to 0.073 mg/L and 0.26 to 1.046 μg/L, respectively.
KW - GIS
KW - cage culture
KW - change detection
KW - coastal zone
KW - marine environment
KW - remote sensing
KW - seagrass
KW - water quality
UR - http://www.scopus.com/inward/record.url?scp=84904264917&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84904264917&partnerID=8YFLogxK
U2 - 10.1080/10106049.2013.798358
DO - 10.1080/10106049.2013.798358
M3 - Article
AN - SCOPUS:84904264917
SN - 1010-6049
VL - 29
SP - 486
EP - 506
JO - Geocarto International
JF - Geocarto International
IS - 5
ER -