Full-time Academic Staff

  • Teaching Staff

Dr. L. Ran 冉立山 助理教授

BA Lanzhou; MA CAS; PhD NUS
Assistant Professor

Office: 1032
Phone: +852 3917-7103


Dr. L. Ran received his B.A. degree in Hydrology from the Lanzhou University (2006), M.A. degree in Fluvial Geomorphology from the Chinese Academics of Sciences (2009), and PhD degree in Physical Geography from the National University of Singapore (2013). Before joining the department, he was working as a postdoc in Singapore. His current research interests reside in riverine carbon cycling and its responses to climate change and human activity, and water and sediment transport in large Asian rivers.

Research Interests

I am a physical geographer with research interests in the following areas:

  • Riverine carbon cycle and carbon dynamics
  • Catchment chemical weathering
  • Soil conservation and sediment delivery
  • River channel change and hydraulic geometry

These concerns are explored through extensive fieldwork in East Asia and Southeast Asia with special attention to the Yellow, Yangtze, Pearl, and Mekong river basins.

Selected Publications
Peer-reviewed Publications
  1. L. Ran, L. Li, M. Tian, X. Yang, R. Yu, J. Zhao, L. Wang, X.X. Lu. 2017. Riverine CO2 emissions in the Wuding River catchment on the Loess Plateau: Environmental controls and dam impoundment impact. Journal of Geophysical Research: Biogeosciences, (forthcoming).

  2. L. Ran, X. X. Lu, S. Liu. 2017. Dynamics of riverine CO2 in the Yangtze River fluvial network and their implications for carbon evasion. Biogeosciences, 14, 2183-2198.

  3. S. Liu, X.X. Lu, X. Xia, X. Yang, L. Ran. 2017. Hydrological and geomorphological control on CO2 outgassing from low-gradient large rivers: An example of the Yangtze River system. Journal of Hydrology, 550, 26-41.

  4. S. Liu, X. X. Lu, X. Xia, S. Zhang, L. Ran, X. Yang, and T. Liu. 2016. Dynamic biogeochemical controls on river pCO2 and recent changes under aggravating river impoundment: An example of the subtropical Yangtze River. Global Biogeochemical Cycles, 30, 880–897.

  5. X. Yang, X.X. Lu, L. Ran. 2016. Sustaining China’s large rivers: River development policy, impacts, institutional issues and strategies for future improvement. Geoforum, 69, 1-4.

  6. L. Ran, X.X. Lu, H. Yang, R. Yu, H. Sun, J. Han. 2015. CO2 outgassing from the Yellow River network and its implications for riverine carbon cycle. Journal of Geophysical Research: Biogeosciences, 120, 1334-1347.

  7. C. Wang, S. Dai, L. Ran, L. Jiang, W. Li. 2015. Contribution of river mouth reach to sediment load of the Yangtze River. Advances in Meteorology, doi:10.1155/2015/415058.

  8. L. Ran, X.X. Lu, J.E. Richey, H. Sun, J. Han, R. Yu, S. Liao, Q. Yi. 2015. Long-term spatial and temporal variation of CO2 partial pressure in the Yellow River, China. Biogeosciences, 12, 921-932.

  9. L. Ran, X.X. Lu, Huiguo Sun, Jingtai Han, Ruihong Yu. 2015. Chemical denudation in the Yellow River and its geomorphological implications, Geomorphology, 231, 83-93.

  10. S. Wang, Y. Wang, L. Ran, T. Su. 2015. Climatic and anthropogenic impacts on runoff changes in the Songhua River basin over the last 56 years (1955-2010), Northeastern China. Catena, 127, 258-269.

  11. L. Ran, X.X. Lu, Z. Xin. 2014. Erosion-induced massive organic carbon burial and carbon emission in the Yellow River basin, China. Biogeosciences, 11, 945-959. (Highlighted byNature Geoscience)

  12. L. Ran, X.X. Lu, H. Sun, J. Han, R. Li, J. Zhang. 2013. Spatial and seasonal variability of organic carbon transport in the Yellow River, China. Journal of Hydrology, 498, 76-88.

  13. X.X. Lu, L. Ran, S. Liu, T. Jiang, S.R. Zhang, J.J. Wang. 2013. Sediment loads response to climate change: A preliminary study of large Chinese rivers. International Journal of Sediment Research, 28, 1-14.

  14. L. Ran, X.X. Lu. 2013. Redressing China’s strategy of water resource exploitation. Environmental Management, 51, 503-510.

  15. L. Ran, X.X. Lu, Z. Xin, X. Yang. 2013. Cumulative sediment trapping by reservoirs in large river basins: a case study of the Yellow River basin. Global and Planetary Change, 100, 308-319.

  16. L. Ran, X.X. Lu, J. Xu. 2013. Effects of vegetation restoration on soil conservation and sediment loads in China: A critical review. Critical Reviews in Environmental Science and Technology, 43, 1-32.

  17. L. Ran, X.X. Lu. 2012. Delineation of reservoirs using remote sensing and their storage estimate: an example of the Yellow River Basin, China. Hydrological Processes, 26, 1215-1229. 

  18. L. Ran, S. Wang, X.X. Lu. 2012. Hydraulic geometry change of a large river: A case study of the upper Yellow River. Environmental Earth Sciences, 66, 1247-1257.

  19. Z. Xin, L. Ran, X.X. Lu. 2012. Soil erosion control and sediment load reduction in the Loess Plateau: policy perspectives. International Journal of Water Resources Development, 28 (2), 325-341.

  20. L. Ran, S. Wang, X. Fan. 2010. Channel change at Toudaoguai Station and its responses to the operation of upstream reservoirs in the upper Yellow River. Journal of Geographical Sciences, 20, 231-247.

  21. L. Ran, S. Wang. 2010. Study on channel evolution and hydraulic geometry in the Inner Mongolia reach of the Yellow River, Journal of Sediment Research, 4, 61-67. (in Chinese)

  22. X. Fan, S. Wang, L. Ran. 2010. Analysis of the Channel Evolution and Influence Factors in Ningxia Reach of the Yellow River. Journal of Water Resources & Water Engineering, 21, 5-11. (in Chinese)

  23. L. Ran, S. Wang, X. Fan, S. Min. 2009. Hydraulic geometry of the upper Yellow River. Yellow River, 31, 38-41. (in Chinese)

  24. S. Wang, Q. Wei, L. Tan, S. Min, L. Ran. 2009. River regime and its variety of the mountainous rivers: Najiang, Lancangjiang and Jinshanjiang Rivers for their reaches in Yunnan Province of China. Journal of Mountain Science, 27, 5-13. (in Chinese)

  25. S. Wang, L. Ran. 2008. Analysis of dam effect on sediment yield in the Wudinghe River Basin. Geographical Research, 27, 811-818. (in Chinese)
Short Communications
  1. L. Ran, X.X. Lu. 2014. Sediment load and carbon burial in the Yellow River during the Holocene. PAGES newsletter, 22, 34-35.

  2. L. Ran, X.X. Lu, Xiankun Yang. 2012. Mindset change needed for China’s water crisis. AMBIO, 41, 216-218.

  3. L. Ran, X.X. Lu. 2011. Cooperation is key to Asian hydropower. Nature, 473, 452.

  4. X.X. Lu, L. Ran. 2011. China flood havoc highlights poor urban planning. Natural Hazards, 56, 575-576.

  5. Yilong Huang, X.X. Lu, L. Ran. 2011. Water engineering is not the panacea for water crisis of China. Journal of Soil and Water Conservation, 66, 130A.
Book Chapters
  1. L. Ran, X.X. Lu. 2012. Estimating sediment trapping efficiency from Landsat images: a case study of the Yellow River basin. In: Collins A.L. et al. (Eds.), Erosion and Sediment Yields in the Changing Environment. IAHS Publ. 356, 259-266.

  2. X.X. Lu, X. Yang, L. Ran. 2012. Delineation of China’s reservoirs and lakes using remote sensing techniques. In: Collins A.L. et al. (Eds.), Erosion and Sediment Yields in the Changing Environment. IAHS Publ. 356, 20-28.

12/2014:  CYWater Young Scientist Best Paper Award (AGU Meeting, San Francisco)

06/2010-08/2010:  Hydrological Synthesis Summer Institute Fellowship (UBC, Canada)

08/2009-07/2013:  PhD scholarship, National University of Singapore

Journal review
Earth Surface Process and Landforms, Journal of Hydrology, Hydrological Processes, Scientific Reports, Geomorphology, Hydrological Research, PNAS, International Journal of Sediment Research, Singapore Journal of Tropical Geography, Journal of Geographical Sciences.