1,2,3,1,3,6,8- 1Faculty of Environment and Natural Resources, University of Freiburg, Freiburg, Germany (aifchen@126.com)
- 2School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, China
- 3School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, China
- 4College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, China
- 5Department of Physics, Imperial College London, London, UK
- 6School of Geography and Ocean Science, Nanjing University, Nanjing, China
- 7Department of Earth System Sciences, Tsinghua University, Beijing, China
- 8Henan Provincial Key Laboratory of Hydrosphere and Watershed Water Security, North China University of Water Resources and Electric Power, Zhengzhou, China
Tropical cyclone precipitation (TCP) and associated floods have caused widespread damage globally. Despite growing evidence of significant changes in the activity of tropical cyclones (TCs) in recent decades, the influence of TCs on regional flooding remains poorly understood. Here, we distinguish the role of TCs in fluvial discharge by explicitly simulating discharge with and without observed TCP in the Lancang‒Mekong River Basin, a vulnerable TC hotspot. Our results show that TCs typically contributed approximately 30% of annual maximum discharge during 1967–2015. However, for rare and high‐magnitude floods (long return periods), TCs are the dominant driver of extreme discharge events. Moreover, spatial changes in Tcinduced discharge are closely related to changes in TCP and TC tracks, showing increasing trends upstream but decreasing trends downstream. This study reveals significant spatiotemporal differences in TC‐induced discharges and provides a methodology for quantifying the role of TCs in fluvial discharge.
How to cite: Chen, A., Wang, J., Toumi, R., Huang, H., Yang, L., Chen, D., He, B., and Liu, J.: Impact of Tropical Cyclone Precipitation on Fluvial Discharge in the Lancang‒Mekong River Basin, EGU General Assembly 2026, Vienna, Austria, 3–8 May 2026, EGU26-10281, https://doi.org/10.5194/egusphere-egu26-10281, 2026.
