, Volume 18, Issue 2, pp 175–194 | Cite as

Modeling the effects of the streamflow changes of Xinjiang Basin in future climate scenarios on the hydrodynamic conditions in Lake Poyang, China

  • Ling-Yan Qi
  • Jia-Cong Huang
  • Ren-Hua Yan
  • Jun-Feng Gao
  • Shi-Gang Wang
  • Yu-Yin Guo
Research paper


The responses of lake hydrodynamics to the hydrological processes in watersheds have been associated with the ecological evolution of and the biochemical processes in aquatic ecosystems. This paper investigates how the changes in the streamflow of Xinjiang Basin in different future climate scenarios could affect the hydrodynamic conditions in Lake Poyang. First, the hydrodynamic processes in Lake Poyang (i.e., lake level and water velocity) were simulated based on the environmental fluid dynamics code (EFDC). Error statistics indicated that the hydrodynamic model reasonably reflected the hydrodynamics in Lake Poyang. Second, the future streamflow of Xinjiang Basin from 2016 to 2050, which was projected in two future climate scenarios (Sim_RCP4.5 and Sim_RCP8.5) based on the Xin’anjiang model, was applied to hydrodynamic modeling to investigate the relationship between future discharge and hydrodynamics. Results showed that the streamflow changes of Xinjiang Basin in future climate scenarios considerably affected the seasonal distribution of the flow field in Lake Poyang. The hydrodynamic change region that exceeded the threshold values under these two climate scenarios both demonstrated a fluctuating trend and nearly covered the entire lake until April. In Sim_RCP8.5 a slightly larger area was influenced than in Sim_RCP4.5, except in January, and the eastern channel was always significantly affected by streamflow change. These analyses can enhance the present understanding of the relationships between the hydrodynamics in lakes and the hydrological processes of sub-basins.


EFDC Hydrodynamic conditions Future climate scenarios Streamflow change Lake Poyang Xinjiang Basin 



This study was financially supported by the National Basic Research Program of China (No. 2012CB417006) and the Major Water Resources Science and Technology Program of the Jiangxi Water Resources Department (No. KT201406). We acknowledge Jiangxi Province Poyang Lake Hydrology Bureau for providing hydrological data. The original meteorological data were collected by China Meteorological Data Sharing Service System. We acquired the latest bathymetry data form the Water Resources Department of Jiangxi Province.


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Copyright information

© The Japanese Society of Limnology 2016

Authors and Affiliations

  • Ling-Yan Qi
    • 1
    • 2
  • Jia-Cong Huang
    • 1
  • Ren-Hua Yan
    • 1
    • 2
  • Jun-Feng Gao
    • 1
  • Shi-Gang Wang
    • 3
  • Yu-Yin Guo
    • 3
  1. 1.Key Laboratory of Watershed Geographic SciencesNanjing Institute of Geography and Limnology, Chinese Academy of SciencesNanjingPeople’s Republic of China
  2. 2.University of Chinese Academy of SciencesBeijingPeople’s Republic of China
  3. 3.Poyang Lake Hydrology Bureau of Jiangxi ProvinceJiujiangPeople’s Republic of China

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