Mapping changes in the marine environment of Phu Quoc Island, Viet Nam | |
| Author | Ton Binh Minh |
| Call Number | AIT Thesis no.RS-08-01 |
| Subject(s) | Marine ecosystem management--Remote sensing--Vietnam--Phu Quoc Island Marine ecosystem management--Geographic information systems--Vietnam--Phu Quoc Island |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Remote Sensing and Geographic Information System |
| Publisher | Asian Institute of Technology |
| Abstract | The coral reefs and sea grass habitat are very important in tropical marine ecosystem. The change of these habitats relates significantly with change in environment. The integration of remote sensing and GIS bas been investigated to map the change of marine environment in Phu Quoc island through mapping change of coral reefs and seagrass in 2000-2004 and 1992-2007 periods. Color composite, band ratio, and principle component analysis techniques were executed for improving reflectance of benthic objects on Aster and Landsat 5 TM images. The image classification was executed based on water column correct images and field data. The overall accuracy were determined at 70% and 77 % for maps in 2007 and 2004 in respectively. The change of live coral reefs and seagrass beds in 1992-2007 and 2000-2004 has been detected based on change detection techniques. Degeneration and regeneration of live coral and seagrass beds have been successfully detected. The live coral reefs in An Thoi area and seagrass beds in Bai Bon area have been degenerated during 1992-2007 and 2000-2004 periods. Therefore, through the degeneration of coral and seagrass, sea environment is changing to worse status in the study area. High spatial resolution of Quick Bird satellite has been used to mapping benthic communities. The Gram-Schmidt Spectral Sharpening was applied to sharpen Quick Bird's multispectral data at 2.4 m spatial resolution using its panchromatic band at 0.6 ill resolution. The Quick Bird high resolution imagery fulfill for mapping benthic communities in detail. |
| Year | 2008 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Remote Sensing (RS) |
| Chairperson(s) | Tripathi, Nitin Kumar; |
| Examination Committee(s) | Kibe, Seishiro;Gallardo, Wenresti; |
| Scholarship Donor(s) | Can Tho People Committee Department; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2008 |