ANALYZING THE EFFECTIVE OF BIO-OPTIC ALGORITHM TO DETECT SEA BOTTOM SUBSTRATE USING REMOTE SENSING DATA

ABSTRACT: Sea bottom substrates including seagrass and seaweed can variously found in Merambong and Tinggi Island at the South and East part of Johor, Malaysia, respectively. These two different areas have different ecosystem where Merambong is near to the industrial area while Tinggi Island is tourism area. Both are difference in the clarity and depth. Bio-optical technique rarely documented for sea bottom features mapping using remote sensed data. Sea bottom substrates such as seagrass, seaweed, sand, coral and mud are processed and mapped by applying bio-optical algorithm to the remote sensing imagery. Worldview-2 with 0.5m high spatial resolution data was used to detect sea bottom substrate to Merambong and Tinggi Island which have different water condition. Thus, the main objective of this study is to analyze the effectiveness in detecting sea bottom substrate using bio-optic at two different complexity of coastal area in the form of the clarity and depth of water. The site verification from spectroradiometer, underwater camera and GPS was used to validate the results. The results show the both area covers with seagrass and seaweed. Coral reef can be found at Tinggi Island while mud much covers Merambong seabed with high accuracy. 1