Mapping of Seagrass Along Sungai Pulai, Johor, Malaysia

Muhamad Ludin, Ahmad Nazri and Rusli @ Ruslik, Noradila and Sheik Abd. Hardy, Abd. Hafiz and Wan Abd. Razak, Wan Juliyana and Majid, Mohammad Rafee and Kasimon, Normah and Mohd. Noh, Marlia (2011) Mapping of Seagrass Along Sungai Pulai, Johor, Malaysia. Working Paper. Centre for Innovative Planning and Development.


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Seagrass, an endangered flora species is unique and vital marine plants, who serve to protect coastal erosion, stabilise the water quality and habitat to marine organisms. Seagrass is a flowering grass with long and narrow green leaves that grows in shallow aquatic meadows along the coastline. The protection of the seagrass meadow is very important as its function not only to preserve coastal water quality, but also to provide shelter and food of other threaten species such as dugong and seahorses. However, seagrass meadows all around the world were disappearing and declining at a very alarming rate, and this includes the Malaysia coastal waters as well. This study aims to detect and map the extent of the seagrass in the study area of Sungai Pulai, Malaysia. Five image classifications were carried out for this research. A maximum likelihood per pixel classifier was applied to the bands selected from image seperability analysis. The analysis were carried out based on spectral reflectance data collected on the site and by adopting two image classification procedure from literature review. The unsupervised classification was conducted for Principle Component Analysis (PCA) image. To validate the result, an accuracy assessment was carried out for all classified images using a moving 5x5 window. From the result obtained, the combination of green, rededge and NIR2, produced significantly better seagrass detection compare with other band combinations. The method employed proved that seagrass can be detected and map out using a combination of bands from the WorldView-2 satellite images. The research also demonstrates that WorldView-2 is capable of detecting seagrass up to 5m depth with more than 70% accuracy depending on the water under current and its turbidity. The study hopes findings from this study could generate more detail study on coastal marine life and the effect of physical and economic development within the watershed boundary.

Item Type: Monograph (Working Paper)
Divisions: Faculty of Built Environment > Urban and Regional Planning
Depositing User: FAB IR Admin
Date Deposited: 24 Jun 2013 05:44
Last Modified: 24 Jun 2013 05:44

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