3. Formulation of guidelines for sustainable integrated watershed management with people participation II. STUDY AREA The study area is located in Cha-am District, Phetchaburi Province covering the study sites of 2 watershed areas: Bangtranoi and Huaisai with an area 64.1 and 19.51 sq. km. respectively, in which the Sirindhorn International Environmental Park (SIEP) and its vicinity area are included (Fig.1). III. MATERIALS AND METHODS 3.1 Land use change analysis To work out the land use change of the study watershed (BTN and HS watershed), Sample point WS Boundary land use classification mapping for the periods from 2009 to 2015 by the Land Development Department (LDD, 2015) was used. The classified images were converted to ArcGIS files format for investigating the change of land use detection and calculated land use change areas from 2009 to 2015 using the raster calculation technique in the spatial analyst module. In addition, a field survey was used. 3.2 Soil resource analysis Totally 10 disturbed and undisturbed soil samples were collected based on land use types and soil series (Fig.2). Soil texture, bulk density and chemical properties (soil fertility) was analyzed in a laboratory, whereas, infiltration rate data was collected during the field survey. Furthermore, on-site soil erosion was calculated using USLE equation and GIS technique. Bangtranoi WS Huaisai WS Fig.2 Soil sampling location Key: Slope complex (Sc), Nhong Kae (Nk), Hup Ka Pong (Hg), Chonburi (Cb), Samutprakarn (Sm), Watana (Wa) 3.3 Forest resource survey Forest inventory techniques were used to measure forest resource involving 235 temporary field sampling plots. The plots are circular; a 17.85, 12.62 and 5.64 meter radius were used to measure forest types, stand density (trees, saplings, seedlings, and bamboos), stand volume, and biodiversity. 15 permanent plots (20 x 40 m2) were used to study canopy crown cover, plant profile, and ecological features (Table 1) and comparison with the study by Faculty of Forestry, Kasetsart University (2008). 256 Proceedings of the International Conference on Climate Change, Biodiversity and Ecosystem Services for the 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
To see the actual publication please follow the link above