Thailand with boundary of water sheds Fig.1 Location of the study area. A. Assessing land use change Land use change was analysed for four time periods (1989, 2000, 2007 and 2013). Year 2000 represents the immediate past before the major agricultural policy implemented to promote rubber plantation in the country. The year 1989 was chosen to examine what was the land use type as it was the year when logging ban was implemented and 2013 to represent the current situation. Land use map 1989 was interpreted from Landsat-5 Thematic Mapper (TM) satellite data for Path 129/Row 48 and 49 acquired on 25 March 1989 from the United States Geological Survey website (http://earthexplorer. usgs.gov/) by visual interpretation technique in ARCGIS 10.2 software (ESRI, 2013). Land use maps for the year 2000, 2007, and 2013 were obtained from the Land Development Department of Thailand in digital format. The land use classes were regrouped for all the years into eleven major land use classes. Land use change was analysed in ARCGIS by creating land use change matrix. B. Assessing ecosystem services The Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST 3.0.1) tool was used to map and quantify a set of ecosystem services in this study. InVEST, a geospatial modeling framework tool, which quantifies and maps a range of ecosystem services and evaluates the impact of land use change on ecosystem services 13, 15, is widely used for assessing ecosystem services 16. In this study, we analysed four selected ecosystem services, 1) water yield, 2) sediment retention, 3) carbon storage, and 4) habitat quality, representing supporting (sediment retention, habitat quality as a proxy of biodiversity), regulating (carbon sequestration), and provisioning (water yield) services. 1) Water yield Water yield is defined as the amount of water runoff from the landscape 17. The water yield model, which runs on a gridded map, requires specific data input in the form of raster maps to estimate the quantity of water Proceedings of the International Conference on Climate Change, Biodiversity and Ecosystem Services for the 137 Sustainable Development Goals (SDGs): Policy and Practice 27-29 June 2016, Cha-am, Phetchaburi, Thailand
Proceedings of International Conference on Climate Change, Biodiversity and Ecosystem Services for the Sustainable Development Goals : Policy and Practice 27-29 June 2016 at the Sirindhorn International Environmental Park, Cha-am, Phetchaburi, Thailand
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