Zoning eco-environmental vulnerability for environmental management and protection |
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| Affiliation: | 1. The Graduate Institute of Hydrological and Oceanic Sciences, National Central University, No. 300, Jhongda Rd., Jhongli District, Taoyuan City 32001, Taiwan, ROC;2. Institute of Geography, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Rd., Cau Giay District, Hanoi Viet Nam;3. Center for Space and Remote Sensing Research, National Central University, No. 300, Jhongda Rd., Jhongli District, Taoyuan City 32001, Taiwan, ROC;4. Taiwan Group on Earth Observations, Hsinchu, Taiwan, ROC;5. Taiwan Geographic Information System Center, Taipei, Taiwan, ROC;6. Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Rd., Cau Giay District, Hanoi, Viet Nam;1. Institute of Poyang Lake Eco-Economics, Jiangxi University of Finance and Economics, Nanchang 330013, China;2. School of Economics and Management, Jiangxi Agriculture University, Nanchang 330045, China;1. Department of Land Resource Management, College of Resources and Environment Science, China Agricultural University, Beijing 100193, China;2. Key Laboratory of Agricultural Land Quality, Ministry of Land and Resources, Beijing 100193, China |
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| Abstract: | Eco-environmental vulnerability assessment is crucial for environmental and resource management. However, evaluation of eco-environmental vulnerability over large areas is a difficult and complex process because it is affected by many variables including hydro-meteorology, topography, land resources, and human activities. The Thua Thien – Hue Province and its largest river system, the Perfume River, are vital to the social-economic development of the north central coastal region of Vietnam, but there is no zoning system for environmental protection in this region. An assessment framework is proposed to evaluate the vulnerable eco-environment in association with 16 variables with 6 of them constructed from Landsat 8 satellite image products. The remaining variables were extracted from digital maps. Each variable was evaluated and spatially mapped with the aid of an analytical hierarchy process (AHP) and geographical information system (GIS). An eco-environmental vulnerability map is assorted into six vulnerability levels consisting of potential, slight, light, medium, heavy, and very heavy vulnerabilities, representing 14%, 27%, 17%, 26%, 13%, 3% of the study area, respectively. It is found that heavy and very heavy vulnerable areas appear mainly in the low and medium lands where social-economic activities have been developing rapidly. Tiny percentages of medium and heavy vulnerable levels occur in high land areas probably caused by agricultural practices in highlands, slash and burn cultivation and removal of natural forests with new plantation forests. Based on our results, three ecological zones requiring different development and protection solutions are proposed to restore local eco-environment toward sustainable development. The proposed integrated method of remote sensing (RS), GIS, and AHP to evaluate the eco-environmental vulnerability is useful for environmental protection and proper planning for land use and construction in the future. |
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| Keywords: | Vulnerability Eco-environment AHP GIS Landsat 8 OLI and TIRS (operational land imager and thermal infrared sensor) Remote sensing |
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