The main objective of this study is to assess geomorphic processes and active tectonics in the Day Nui Con Voi (DNCV) area of Vietnam. For this purpose, a spatial database was collected and constructed, including DEM (Digital Elevation Model) and a geological map. The hypsometric curve (HC) analysis method and its statistical moments were adopted to use for the assessment. | Vietnam Journal of Earth Sciences, 38(2), 202-216, DOI: Vietnam Academy of Science and Technology Vietnam Journal of Earth Sciences (VAST) Assessment of geomorphic processes and active tectonics in Con Voi mountain range area (Northern Vietnam) using the hypsometric curve analysis method Ngo Van Liem*1, Nguyen Phuc Dat2, Bui Tien Dieu3,4, Vu Van Phai5, Phan Trong Trinh1, Hoang Quang Vinh1, Tran Van Phong1 1 Institute of Geological Sciences, Vietnam Academy Science and Technology Vietnam Institute of Geosciences and Mineral Resources, Ministry of Natural Resources and Environment 3 Geographic Information System Group, Department of Business Administration and Computer Science, University College of Southeast Norway 4 Faculty of Geomatics and Land Administration, Hanoi University of Mining and Geology 5 Faculty of Geography, VNU University of Sciences 2 Received 25 January 2016. Accepted 7 June 2016 ABSTRACT The main objective of this study is to assess geomorphic processes and active tectonics in the Day Nui Con Voi (DNCV) area of Vietnam. For this purpose, a spatial database was collected and constructed, including DEM (Digital Elevation Model) and a geological map. The hypsometric curve (HC) analysis method and its statistical moments were adopted to use for the assessment. These methods have been widely used for the assessment of geomorphic processes and active tectonics in many areas in the world showing promising results. A total of 44 sub-basins of the Red River and the Chay river were analyzed. The result shows that 3 curve-types such as "straight- shape", "Sshape", and concave were found; with the concave curve being the dominant and widely distributed in the northeast side and in the south of the southwestern side of the study area. The hypsometric integral (HI) values are rather small with the largest value is and the smallest one is . Other statistical moments of the .
