Watershed degradation assessment using remote sensing and GIS : a case study of Nam Thone watershed, Lao PDR | |
| Author | Thongmanivong Sithong |
| Call Number | AIT Thesis no.SR-97-22 |
| Subject(s) | Geographic information systems Remote sensing--Laos--Nam Thone Watershed |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. SR-97-22 |
| Abstract | This study relates to the applicability of the Remote Sensing and Geographic lnf01mation System (GIS) for the watershed degradation assessment in Nam Thone Watershed and to find out the priority areas for rehabilitation based on the results. The data sets used for this study are the remote sensing images i.e. Landsat TM and SPOT, topographic maps and a number of other secondary data sets. The methodologies used for the analysis of the data are based on the principle of the watershed classification as devised by the Mekong River Commission Secretariat (MRCS). The land use and land cover change detection study was carried out using the two date satellite images by employing the visual analysis techniques. Five degradation classes have been identified from data analysis in GIS, in which the land use map is overlaid with watershed classes. To perfo1m this study, vector based GIS tool was widely utilized for digitizing, overlaying, analysis and for producing the thematic maps The slope, aspect and landfo1m were extracted from the digital tenain model (DTM) processed from topographic map, digitized in line mode. The land use maps were reduced from SPOT and Landsat image1ies using visual interpretation. The GIS has been found more effective in analyzing the degradation disttibution spatially by overlaying WSC map with land use coverage. The resultant thematic maps show the spatial disttibution of the degraded and nondegraded areas of the study area. As per the map the DC-1, the No. 1 p1io1ity area occupies 9.04 percent of the study area. While as the DC-5, least degradation area occupies 7.37 percent. The non-degraded area occupies 64.33 percent of the study area. |
| Year | 1997 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. SR-97-22 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Space Technology Application and Research (SR) |
| Chairperson(s) | Lantican, Celso B. |
| Examination Committee(s) | Kaew Nualchawee ;Mather, Robelt |
| Scholarship Donor(s) | GTZ (Deutshe Gesllschaft fuer Technische Zusammenarbeit) |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1997 |