TAILIEUCHUNG - Nghiên cứu xác định biến động đường bờ thượng lưu sông Sê San, tỉnh Kontum trên cơ sở phân tíh dữ liệu viễn thám đa thời gian

Nghiên cứu sử dụng ảnh Landsat trong giai đoạn 1990-2013 để xác định những đường bờ cơ sở nhằm phân tíh những thay đổi theo không gian và thời gian; đồng thời, nghiên cứu những ảnh hưởng tới hoạt động sử dụng đất. Kết quả đã chỉ ra rằng điểm sạt lở mạnh nhất nằm trên chi lưu Đăc Bla thuộc địa phận thị xã Kon Tum với tốc độ trung bình 2,96 m/năm. | VNU Journal of Science Earth and Environmental Sciences Vol. 36 No. 4 2020 102-115 Original Article Determination of Shoreline Changes along Upstream of Se San River Kontum Province based Multi-temporal Remote Sensing Data Analysis Pham Thu Thuy1 Pham Viet Hoa2 Vu Van Tich1 Pham Minh Tam3 1 Science and Technology Department Vietnam National University Hanoi 144 Xuan Thuy Hanoi Vietnam 2 Ho Chi Minh City Institute of Resources Geography 01 Mac Dinh Chi Ho Chi Minh city Vietnam 3 Faculty of Geography VNU University of Science 334 Nguyen Trai Ha Noi Vietnam Received 01 September 2020 Revised 25 September 2020 Accepted 01 October 2020 Abstract Se San river upstream includes Poko tributary on the right bank and Dak Bla tributary on the left bank mostly located in Kon Tum province. The process of river sediment decline has dramatic shoreline changes in this area which becomes a driving-force to modify the current socio- economic development as well as the impact on territorial planning in the future. This study aims to analyze the shoreline changes by extracting multi-temporal satellite imagery of Landsat in the period of 1990-2013 and identify its change effects on land-use. The results show that the strongest erosion rate was m year in Dak Bla tributary in Kon Tum town . And in the Poko tributary the average value of erosion rate is m year and the average accretion rate is m year. In the context of dramatic land-use change this approach allows to support for territorial management and illustrates the accretion-erosion relationship in river basin evolution. Keywords Se San river basin shoreline change multi-temporal remote sensing data. ________ Corresponding author. E-mail address phamthuthuy@ https 2588-1094 102 . Thuy et al. VNU Journal of Science Earth and Environmental Sciences Vol. 36 No. 4 2020 102-115 103 Nghiên cứu xác định biến động đường bờ thượng lưu sông Sê San tỉnh Kontum trên cơ sở phân tích dữ

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