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https://doi.org/10.20495/seas.6.2_357
Copy DOIJournal: Southeast Asian Studies | Publication Date: Aug 24, 2017 |
License type: free |
(ProQuest: ... denotes non-US-ASCII text omitted.)IntroductionAlthough it is known that the agrarian transformation in Northeast Thailand has resulted in major changes in land use in the region, including a decline in the area of natural forest due to the expansion of cash crops and the conversion of agricultural land into the new housing estates that surround the region's rapidly expanding urban centers, detailed empirical studies on the nature and causes of land use changes in specific areas are lacking. Therefore, the present study was carried out in order to describe recent changes in agricultural land use and identify the factors influencing these changes in two districts along the bank of the Mekong River in Nakhon Phanom Province. This area is of particular interest because it is characterized by more fertile soil and a higher amount of rainfall than is typical in Northeast Thailand. It also borders the Lao People's Democratic Republic, to which it has been linked by the Third Friendship Bridge between Nakhon Phanom and Khammouane Provinces, which was officially opened on November 11, 2011. This and other transportation links, which are being built in the context of the Greater Mekong Subregion Economic Corridor and ASEAN Economic Community, may be influencing changes in land use in the area.MethodologyResearch SiteThis study was conducted in Mueang and That Phanom Districts in Nakhon Phanom Province (coordinates: Upper left 17.99N, 103.96E, Upper right 17.99N, 104.86E, Lower left 16.70N, 103.96E, and Lower right 16.70N, 104.86E) in the valley of the Mekong River (Fig. 1). Neighboring provinces (clockwise from the south) are Mukdahan, Sakon Nakhon, and Bueng Kan. In the northeast, the province borders Khammouane of Laos. The northern part of the province has both uplands and forest-covered plains and is drained by the Song Kram and the smaller Oun Rivers. The southern part is mostly flatland, with the Kum the only notable river. The provincial capital, the city of Nakhon Phanom, is located directly on the bank of the Mekong.Mueang Nakhon Phanom is the capital district of Nakhon Phanom Province. Mueang District is subdivided into 15 subdistricts (tambol), which are further subdivided into 169 villages (muban). The city of Nakhon Phanom (thesaban mueang) covers all of Nai Mueang and Nong Saeng Subdistricts as well as parts of At Samat and Nong Yat Subdistricts.That Phanom District is in the southern part of Nakhon Phanom Province. The district is named after Wat Phra That Phanom, the most important Buddhist temple in the region. The district is divided into 12 subdistricts, which are further subdivided into 142 villages. That Phanom Municipality covers parts of That Phanom and That Phanom Nuea Subdistricts.Data SourcesLand use maps for 2006 and 2010 of both districts were obtained in shapefile format from Land Development Department Office 4 in Ubon Ratchatani. These maps were made from unclouded and terrain corrected Landsat images in 2006 and 2010. Image processing and data manipulation were conducted using ERDAS IMAGINE 8.6 and ArcGIS 9.1. A handheld Garmin GPS eTrex HC (12-15 m accuracy) was used to obtain the coordinates of plots with different types of land uses. Some ancillary data were also used as references in image processing (Land Development Department 2010).Information on the causes of some important types of land use changes in several localities was collected from local officials and farmers by holding focus groups. This was done after the changes in land use were analyzed and several problematic types of change were identified, especially conversion of paddy fields to forests and vice versa.Method of AnalysisSpatial analysis employing the Decision Support System Research and Development Network for Agricultural and Natural Resource Management (DSSARM)4 Program was used to identify all plots that had been converted from one land use to a different one between 2006 and 2010. …
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