Study on spatial distribution of coral reefs in Nam Yet island by using GIS and remote sensing techniques

Nguyen Xuan Tung, Do Huy Cuong, Bui Thi Bao Anh, Nguyen Thi Nhan, Nguyen The Luan, Pham Duc Hung

Abstract


Research and application of GIS and remote sensing techniques combined with field survey in coastal areas of Nam Yet island had been carried out to establish the distribution map of submarine habitats. Depth-invariant index was used to correct water column’s effects on spectral reflectance of each habitat. The results of satellite image classification showed that area with well-developed coral at great depths accounted for 12%, area with well-developed coral at small depths accounted for 9%, area with poorly-developed coral accounted for 13%, dead coral area accounted for 15% and area of sand, grit, pebbles and weathered coral accounted for 51%. The assessment after classification showed that the overall accuracy of the satellite image interpretation process was 94% and the kappa coefficient was 0.93.

Keywords


Nam Yet island, GIS, remote sensing, depth-invariant index, coral reefs.

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References


Edwards, A. J., 2004. Remote sensing Handbook for Tropical CoastalManagement (extracts).

Vanderstraete, T. (2007). The Use of Remote Sensing for Coral Reef Mapping in Support of Integrated Coastal Zone Management: A Case Study in the NW Red Sea-Volume I (Doctoral dissertation, Ghent University).

Sekhar, N. U. (2005). Integrated coastal zone management in Vietnam: Present potentials and future challenges. Ocean & Coastal Management, 48(9–10), 813–827.

Mohd, M. I. S., Yahya, N. N., Ahmad, S., Komatsu, T., and Yanagi, E., 2010. Sea bottom mapping from ALOS AVNIR-2 and quickbird satellite data. University Teknologi Malaysia.

English, S. S., Wilkinson, C. C., and Baker, V. V., 1997. Survey manual for tropical marine resources. Australian Institute of Marine Science. 390 p.

Nguyễn Văn Thảo, Đỗ Thị Thu Hương, 2009. Nghiên cứu phân bố san hô vùng đảo Cồn Cỏ bằng tư liệu viễn thám. Tạp chí Khoa học và Công nghệ biển, 9(phụ trương 1), 284–294.

Lyzenga, D. R., 1981. Remote sensing of bottom reflectance and water attenuation parameters in shallow water using aircraft and Landsat data. International journal of remote sensing, 2(1), 71–82. doi:10.1080/01431168108948342.

Heck, K. L., and Thoman, T. A., 1984. The nursery role of seagrass meadows in the upper and lower reaches of the Chesapeake Bay. Estuaries, 7(1), 70–92.

Yang, D., Yang, Y., Yang, C., Zhao, J., and Sun, Z., 2011. Detection of seagrass in optical shallow water with Quickbird in the Xincun bay, Hainan province, China. IET image processing, 5(5), 363–368. doi:10.1049/iet-ipr.2009.0392.




DOI: https://doi.org/10.15625/1859-3097/19/3B/14524


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