Yang, Ci-Jian


Yang, Ci-Jian

Assistant Professor


Office :Room 503, Department of Geography

Email :

Phone :+886-2-33665830

Lab:Surface Processes and Landforms


Current fields of interest focus primarily on Earth's surface processes and landforms. The main goal of my research is to provide relevant information on the dynamics of surface processes, thus enabling the interaction between geomorphic processes and physico-chemical systems. The topics include the following:

1.Landscape dynamics via on-site monitoring and numerical simulation.

a.Badland landscape dynamics
Dr. Yang has published 5 SCI papers related to badland landscape dynamics since 2019, including 4 papers listed as first author, one of them was published in Nature Communications. As far, Dr. Yang provides a framework to investigate how tectonic and climatic processes on mudstone badland evolution in southwestern Taiwan. The next part of the project aims at generating the spatially complete set of observational constraints on badland landscape.

2.Fluvial process during major floods in mountain rivers.

a. Acoustic ambient noise analyses on the detection of bedload transportation
Two overarching interests in this project: First, to raise a high-quality, long-term dataset on bedload dynamics and threshold of motion. This will be unique for the typhoon-dominated rivers of Taiwan and can be used to inform local hazard protection measures. Second, use this dataset to investigate how far the extreme conditions of Taiwan lead to similar or different behavior in temporal bedload dynamics in comparison to previous observations and models.

b. Mobilization and controls on sediment transportation from lithologic, biologic, and anthropogenic sources during major floods in mountain rivers.

c. Development of an image-based detection method for river driftwood and flux estimation.

3.Capability and limitation of carbon sequestration of olivine fertilization over various agricultural practices.

The main scope of this project addresses the relation between land use, climatic effects, and the enhanced weathering rate, which needs more detailed and precise observation data to analyze the effect of environmental change on the efficiency of carbon sequestration. Dr. Yang conduct additional olivine fertilization in three standard sample plots with various agricultural practices and monthly water chemistry and the minutes-resolution water stage constrain the result of carbon sequestration.


2020 Ph.D., Tectonic and climatic processes on mudstone badland evolution in southwestern Taiwan, Geography, National Taiwan University.

2021-2023 Postdoctoral fellow, German Research Centre for Geosciences, Potsdam.
2020-2021 Postdoctoral fellow, National Taiwan University.
2020-2021 Adjunct assistant professor, National Taiwan Normal University.


Geomorphology and Lab. 地形學及實習

Drainage Basin Geomorphology 集水區地形學

Field Geomorphology 野外地形學

Terrain analysis and hydrologic modeling 數值地形分析與水文分析

Special Topics in Geography (I) 地理議題專論一

Computer Programming 程式設計 (英文授課)

Surface Processes and Landscape Evolution 地表作用與演育


  1. Chuanqi He, Ci-Jian Yang, Jens M. Turowski, Richard F. Ott, Jean Braun, Hui Tang, Shadi Ghantous, Xiaoping Yuan, and Gaia Stucky de Quay (2024). A global dataset of the shape of drainage systems, Earth Syst. Sci. Data, 16,1151–1166. (IF:11.82; 3/191 Earth and Planetary Sciences - General Earth and Planetary Sciences)
  2. Jun-Yi Lee, Ci-Jian Yang, Tsung-Ren Peng, Tsung-Yu Lee, and Jr-Chuan Huang (2023) Landscape structures regulate the contrasting response of recession along rainfall amounts, Hydrol. Earth Syst. Sci., 27, 4279–4294. (IF: 6.3; 11/103 WATER RESOURCES)
  3. Sen Xu, Aaron Bufe, Si-Liang Li, Erica D. Erlanger, Lishan Ran, Jun Zhong, Ci-Jian Yang, Liwei Zhang, Tingting Ma, Dirk Sachse (2023). Erosional modulation of the balance between alkalinity and acid generations from rock weathering. Geochimica et Cosmochimica Acta. (IF: 5.3; 8/87, GEOCHEMISTRY & GEOPHYSICS)
  4. Loan Thi Phan, Sue-Ching Jou, Chyi-Rong Chiou, Ci-Jian Yang (2023). Is it because of climate change? Social-ecological system analysis of wetland protected area in Vietnamese Mekong Delta. Wetlands Ecology and Management.
  5. Lin Gao, Chuanqi He, Gang Rao, Ci-Jian Yang, Xiaoping Yuan, Jingtao Lai, Pengcheng Tang, Lei Wu (2023). Numerical examination of the geomorphic indicators for lateral fold growth. Geomorphology, 432. (IF:4.14; 11/50 Geography, Physical).
  6. Ci-Jian Yang, Pei-Hao Chen, Erica D. Erlanger, Jens M. Turowski, Sen Xu, Tse-Yang Teng, Jiun-Chuan Lin, and Jr-Chuang Huang (2023). Mobile evaporite enhances the cycle of physical–chemical erosion in badlands. Earth Surface Dynamics, 11(3). (IF:3.4; 18/50 Geography, Physical).
  7. Chung-Te Chang, Ci-Jian Yang, Jr-Chuan Huang (2022). Wet depositions of cations in forests across NADP, EMEP, and EANET monitoring networks over the last two decades. Environmental Science and Pollution Research. (IF:5.19; 87/274 Environmental Sciences).
  8. Chung-Te Chang, Lixin Wang, Lih-Jih Wang, Chiung-Pin Liu, Ci-Jian Yang, Jr-Chuan Huang, Chiao-Ping Wang, Neng-Huei Lin and Teng-Chiu Lin (2022). On the seasonality of long-range transport of acidic pollutants in East Asia. Environmental Research Letters, 17(9). (IF:6.94; 55/274 Environmental Sciences).
  9. Chung-Te Chang, Ci-Jian Yang, Ko-Han Huang, Jr-Chuan Huang, Teng-Chiu Lin (2022). Changes of precipitation acidity related to sulfur and nitrogen deposition in forests across three continents in north hemisphere over last two decades. Science of the Total Environment, 806. (IF:7.96; 25/274 Environmental Sciences).
  10. Chuanqi He, Ci-Jian Yang, Gang Rao, Duna C. Roda-Boluda, Xiaoping Yuan, Rong Yang, Lin Gao, Li Zhang (2021). Landscape response to normal fault linkage: Insights from numerical modeling. Geomorphology, 388. (IF:4.14; 11/50 Geography, Physical).
  11. Chuanqi He, Ci-Jian Yang, Jens M. Turowski (2021). The effect of roughness spacing and size on lateral deflection of bedload particles. Water Resources Research, 57. (IF:5.24; 11/98 Water Resources).
  12. Ci-Jian Yang, Jens M. Turowski, Niels Hovius, Jiun-Chuan Lin & Kuo-Jen Chang (2021, Jul). Badland landscape response to individual geomorphic events. Nature Communications, 12(1):4631. (IF:14.92; 4/72 Multidisciplinary Sciences).
  13. Ci-Jian Yang, Chia-Hung Jen, Yeuan-Chang Cheng, Jiun-Chuan Lin (2021). Quantification of mudcracks-driven erosion using terrestrial laser scanning in laboratory runoff experiment. Geomorphology, 375. (IF:4.12; 11/50 Geography, Physical).
  14. Chuanqi He, Ci-Jian Yang, Jens M. Turowski, Gang Rao, Duna C. Roda-Boluda & Xiao-Ping Yuan (2021). Constraining tectonic uplift and advection from the main drainage divide of a mountain belt. Nature communications, 12,544. (IF:14.92; 4/72 Multidisciplinary Sciences).
  15. Tseng, C.-W., Song, C.-E., Wang, S.-F., Chen, Y.-C., Tu, J.-Y., Ci-Jian Yang, Chuang, C.-W. (2020). Application of High-Resolution Radar Rain Data to the Predictive Analysis of Landslide Susceptibility under Climate Change in the Laonong Watershed, Taiwan. Remote Sensing, 12(23), 3855. (IF:4.85; 27/200 Geosciences, Multidisciplinary).
  16. Kuo-Jen Chang, Chun-Wei Tseng, Chih-Ming Tseng, Ta-Chun Liao and Ci-Jian Yang* (2020). Application of Unmanned Aerial Vehicle (UAV)-Acquired Topography for Quantifying Typhoon-Driven Landslide Volume and Its Potential Topographic Impact on Rivers in Mountainous Catchments. Applied Sciences, 10(17), 6102. (IF:2.68; 38/90 Engineering, Multidisciplinary).
  17. Ray Y. Chuang, Chih-Heng Lu, Ci-Jian Yang, Ya-Shien Lin, Tsung-Yu Lee (2020). Coseismic uplift of the 1999 M w7.6 Chi‐Chi earthquake and implication to topographic change in frontal mountain belts. Geophysical Research Letters, 47. (IF:4.72: 31/200 Geosciences, Multidisciplinary).
  18. Chuanqi He, Ci-Jian Yang, Gang Rao, Xiao-Ping Yang, Duna Roda-Boluda, Yali Cheng, Rong Yang, Li Zhang, Qi Yao (2020). Seismic assessment of the Weihe Graben, central China: Insights from geomorphological analyses and 10Be-derived catchment denudation rates. Geomorphology, 359(15). (IF:4.12; 11/50 Geography, Physical).
  19. Gang Rao, Chuanqi He, Hanlin Chen, Xiaoping Yang, Xuhua Shi, Peng Chen, Jianmin Hu, Qi Yao, Ci-Jian Yang (2020). Use of small unmanned aerial vehicle (sUAV)-acquired topography for identifying and characterizing active normal faults along the Seerteng Shan, North China. Geomorphology, 359(15). (IF:4.12; 11/50 Geography, Physical).
  20. Ci-Jian Yang*, Li-Wei Yeh, Yeuan-Chang Cheng, Chia-Hung Jen, Jiun-Chuan Lin (2019, Dec). Badland Erosion and Its Morphometric Features in the Tropical Monsoon Area. Remote sensing, 11(24), 3051. (IF:4.85; 27/200 Geosciences, Multidisciplinary).
  21. Yeuan-Chang Cheng, Ci-Jian Yang*, Jiun-Chuan Lin (2019, Oct). Application for Terrestrial LiDAR on Mudstone Erosion Caused by Typhoons. Remote sensing, 11(20), 2425. (IF:4.85; 27/200 Geosciences, Multidisciplinary).
  22. Chuanqi He, Gang Rao, Rong Yang, Jianmin Hu, Qi Yao, Ci-Jian Yang (2019). Divide migration in response to asymmetric uplift: Insights from the Wula Shan horst, North China. Geomorphology, 339,44-57. (IF:4.139; 11/50 Geography, Physical).
  23. Ya-Shien Lin, Ray Y. Chuang, Jiun-Yee Yen, Yi-Chin Chen, Yu-Ting Kuo, Bo-Lin Wu, Shao-Yi Huang, Ci-Jian Yang (2018). Mapping surface breakages of the 2018 Hualien earthquake by using UAS photogrammetry. Terrestrial, Atmospheric, and Oceanic Sciences, 30(3),351-366. (IF:1.00)
  24. Ci-Jian Yang, Jiun-Chuan Lin, Yuan-Chang Cheng (2016).The Process and Mechanism of Rill development on Mudstone slope – a case study in Taiwan. Journal of Geographical Science, 81, 27-42 (in Chinese).
  25. Ci-Jian Yang, Jiun-Chuan Lin, Yuan-Chang Cheng (2015). Application of Terrestrial LiDAR on Mudstone Regolith Erosion. Journal of Chinese Soil and Water Conservation, 46(3), 150-157 (in Chinese).


Fiscal YearPlan NameTitle
114 颱風對山地集水區河流沉積物輸送行為與近地表水循環的影響(3/3) 計畫主持人
113 惡地地形特徵圖製作-以牛埔水土保持教室為例 計畫主持人
113 颱風對山地集水區河流沉積物輸送行為與近地表水循環的影響(2/3) 計畫主持人
112 颱風對山地集水區河流沉積物輸送行為與近地表水循環的影響(1/3) 計畫主持人


2021-2022 MOST recruiting Postdoc fellowships. Host institution: German Research Center for Geoscience, GFZ.
2020-2021 MOST recruiting Postdoc fellowships. Host institution: National Taiwan University
2018-2019 Graduate Students Study Abroad Program sponsored by Ministry of Science and Technology. Host institution: German Research Center for Geoscience, GFZ.

2020 Vei-Chow Juan thesis award.
2019 Taiwan Geosciences Assembly.
2018 Annual Meeting of Geological and Geophysical Society.
2015 Chinese Soil and Water Conservation Society.
2014 Annual Meeting of Geological Society of China.
2014 Department of Geography, National Taiwan University.