Erosion study of limestone on the Cat Ba islands in north east Vietnam by transverse micro-erosion meter

Authors

  • Nguyen Trung Minh Vietnam national Museum of Nature Vietnam Academy of Science and Technology Building A20, No.18 Hoang Quoc Viet Street, Cau Giay Street, Hanoi, Vietnam, Viet Nam
  • Doan Dinh Hung Vietnam National Museum of Nature Vietnam Academy of Science and Technology Building A20, No.18 Hoang Quoc Viet Street, Cau Giay Street, Hanoi, Vietnam, Viet Nam
  • Nguyen Thi Dung Vietnam National Museum of Nature Vietnam Academy of Science and Technology Building A20, No.18 Hoang Quoc Viet Street, Cau Giay Street, Hanoi, Vietnam, Viet Nam
  • Tran Minh Duc Vietnam National Museum of Nature Vietnam Academy of Science and Technology Building A20, No.18 Hoang Quoc Viet Street, Cau Giay Street, Hanoi, Vietnam, Viet Nam
  • Nguyen Ba Hung Vietnam National Museum of Nature Vietnam Academy of Science and Technology Building A20, No.18 Hoang Quoc Viet Street, Cau Giay Street, Hanoi, Vietnam, Viet Nam
  • Cu Sy Thang Institute of Geological Sciences Vietnam Academy of Science and Technology Alley 84 Chua Lang Street, Dong Da District, Hanoi, Vietnam, Viet Nam

DOI:

https://doi.org/10.15587/1729-4061.2017.92168

Keywords:

Karst landscapes, Cat Ba, erosion, TMEM, limestone

Abstract

Erosion rate at the Cat Ba island stations ranged from 0.196 to 0.282 mm/year shows that the average value in comparison with previous study results ranges from ±0.2 to ±0.5 mm with strong eroded level. Relative erosion rate value is the lowest at measuring stations X2 on April 8th, 2015 and the highest is at measuring stations Z7 on November 9th 2015, the average value in comparison with previous study results, ranges from ±0.05 to ±0.2 mm with average eroded level and from ±0.2 to ±0.5 mm with strong eroded level.

The results of relative erosion rate on April 8th, 2015 are lower than on November 9th, 2015. Total rainfall values counted from the beginning of the study to the first measuring date (April 8th, 2015) and the second measuring date (November 9th, 2015) are 980.2 mm and 2280 mm, respectively. Therefore, the erosion rate of limestone is strongly affected by changes of total rainfall on the Cat Ba Island.

Average relative erosion rates in this study are quite high at some submerged zone stations (about over 0.2 mm/year, on average) and quite low with some stations on land in comparison with some previous studies all over the world. Therefore, it needs more assessment in longer period to study more accurately some other impacts on weathering and erosion processes.

Author Biographies

Nguyen Trung Minh, Vietnam national Museum of Nature Vietnam Academy of Science and Technology Building A20, No.18 Hoang Quoc Viet Street, Cau Giay Street, Hanoi, Vietnam

PhD, Associate Professor, Director

Doan Dinh Hung, Vietnam National Museum of Nature Vietnam Academy of Science and Technology Building A20, No.18 Hoang Quoc Viet Street, Cau Giay Street, Hanoi, Vietnam

Master of Science, Researcher

Nguyen Thi Dung, Vietnam National Museum of Nature Vietnam Academy of Science and Technology Building A20, No.18 Hoang Quoc Viet Street, Cau Giay Street, Hanoi, Vietnam

Master of Science, Researcher

Tran Minh Duc, Vietnam National Museum of Nature Vietnam Academy of Science and Technology Building A20, No.18 Hoang Quoc Viet Street, Cau Giay Street, Hanoi, Vietnam

Bachelor of Science, Researcher

Nguyen Ba Hung, Vietnam National Museum of Nature Vietnam Academy of Science and Technology Building A20, No.18 Hoang Quoc Viet Street, Cau Giay Street, Hanoi, Vietnam

Bachelor of Science, Researcher

Cu Sy Thang, Institute of Geological Sciences Vietnam Academy of Science and Technology Alley 84 Chua Lang Street, Dong Da District, Hanoi, Vietnam

Master of Science, Researcher

References

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Published

2017-02-28

How to Cite

Minh, N. T., Hung, D. D., Dung, N. T., Duc, T. M., Hung, N. B., & Thang, C. S. (2017). Erosion study of limestone on the Cat Ba islands in north east Vietnam by transverse micro-erosion meter. Eastern-European Journal of Enterprise Technologies, 1(10 (85), 36–44. https://doi.org/10.15587/1729-4061.2017.92168

Issue

Vol. 1 No. 10 (85) (2017): Ecology. Technology and Equipment of Food Production

Section

Ecology

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Copyright (c) 2017 Nguyen Trung Minh, Doan Dinh Hung, Nguyen Thi Dung, Tran Minh Duc, Nguyen Ba Hung, Cu Sy Thang

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