Landuse and Landcover Change Detection and Wetland Biomass Estimation in Klias Peninsula of Malaysia using Remote Sensing and GIS
The objectives of this project were: 1) To update the current landuse and landcover map of the study area, 2) To identify and map of the changes in the mangrove forests, 3) To estimate the biomass of the current mangrove forest in Klias Peninsula using ALOS/PALSAR data.
Klias Peninsula is known as the last largest remaining wetland in Sabah, Malaysia. The full Polarimetric ALOS/PALSAR and ALOS/AVNIR-2 of 2010 sensors were used to produce the most recent landuse and landcover map of the study area. ALOS/PALSAR images were very useful for the study as clouds often cover the area. A combination of field data and past landuse and landcover maps were used to carry out the classification. ALOS/PALSAR PLR 1.1 level data was used to apply Wishart classification algorithm for the SAR data. Optical image classification was carried out using maximum likelihood algorithm. To improve the accuracy of the classification, the Principal Component Analysis was used for the classification, especially for distinguishing the mangroves from the other forests. LANDSAT-TM images of 1995 and 2004 were also classified to examine the mangrove forest change. It was found that the mangrove forest area declined from 1995 to 2010, but started to increase from 2004, which is mainly due to the mangrove re-plantation campaigns carried out by the forest department. The biomass estimation of the mangrove forest was obtained by using a relationship between the mangrove forest biomass and the SAR backscatter coefficient.