Assessment of Forest Degradation in Vietnam Using Landsat Time Series Data
| Autor: | Hoang Tat Duong, Jacob Shermeyer, Do Xuan Lan, Le Van Huong, Hua Shi, Michael C. Wimberly, James E. Vogelmann, Phung Van Khoa |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
land use change
Lam Dong Province 010504 meteorology & atmospheric sciences Range (biology) forest degradation 0211 other engineering and technologies Forestry 02 engineering and technology Land cover lcsh:QK900-989 01 natural sciences Geography Vietnam lcsh:Plant ecology Land use land-use change and forestry Landsat time series Forest degradation Physical geography Time series 021101 geological & geomatics engineering 0105 earth and related environmental sciences |
| Zdroj: | Forests, Vol 8, Iss 7, p 238 (2017) Forests; Volume 8; Issue 7; Pages: 238 |
| ISSN: | 1999-4907 |
| Popis: | Landsat time series data were used to characterize forest degradation in Lam Dong Province, Vietnam. We conducted three types of image change analyses using Landsat time series data to characterize the land cover changes. Our analyses concentrated on the timeframe of 1973–2014, with much emphasis on the latter part of that range. We conducted a field trip through Lam Dong Province to develop a better understanding of the ground conditions of the region, during which we obtained many photographs of representative forest sites with Global Positioning System locations to assist us in our image interpretations. High-resolution Google Earth imagery and Landsat data of the region were used to validate results. In general, our analyses indicated that many land-use changes have occurred throughout Lam Dong Province, including gradual forest to non-forest transitions. Recent changes are most marked along the relatively narrow interfaces between agricultural and forest areas that occur towards the boundaries of the province. One important observation is that the most highly protected national reserves in the region have not changed much over the entire Landsat timeframe (1972–present). Spectral changes within these regions have not occurred at the same levels as those areas adjacent to the reserves. |
| Databáze: | OpenAIRE |
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