Journal metrics

Journal metrics

  • CiteScore value: indexed CiteScore indexed
  • SNIP value: indexed SNIP
    indexed
  • SJR value: indexed SJR
    indexed
  • IPP value: indexed IPP
    indexed
Proc. IAHS, 379, 211-215, 2018
https://doi.org/10.5194/piahs-379-211-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Pre-conference publication
05 Jun 2018
Impacts of the thawing-freezing process on runoff generation in the Sources Area of the Yellow River on the northeastern Qinghai-Tibet Plateau
Xiaoling Wu1, Xiaohua Xiang1, Chao Qiu2, and Li Li3 1College of Hydrology and Water Resource, Hohai University, Nanjing 210098, China
2Zhejiang Provincial Hydrology Burean, Hangzhou 310009, China
3Jiangsu Province Water Engineering Sci-tech Consulting. Corp.Ltd, Nanjing 210009, China
Abstract. In cold regions, precipitation, air temperature and snow cover significantly influence soil water, heat transfer, the freezing-thawing processes of the active soil layer, and runoff generation. Hydrological regimes of the world's major rivers in cold regions have changed remarkably since the 1960s, but the mechanisms underlying the changes have not yet been fully understood. Using the basic physical processes for water and heat balances and transfers in snow covered soil, a water-heat coupling model for snow cover and its underlying soil layers was established. We found that freezing-thawing processes can affect the thickness of the active layer, storage capacity for liquid water, and subsequent surface runoffs. Based on calculations of thawing-freezing processes, we investigated hydrological processes at Qumalai. The results show that the water-heat coupling model can be used in this region to provide an understanding of the local movement of hydrological regimes.
Citation: Wu, X., Xiang, X., Qiu, C., and Li, L.: Impacts of the thawing-freezing process on runoff generation in the Sources Area of the Yellow River on the northeastern Qinghai-Tibet Plateau, Proc. IAHS, 379, 211-215, https://doi.org/10.5194/piahs-379-211-2018, 2018.
Publications Copernicus
Download
Short summary
In cold regions the mechanisms of runoff generation have not yet been fully understood. In this study, a water-heat coupling model for snow cover and its underlying soil layers was established. Results show that the soil water storage played an important role in spring runoff generation. In winter, thick snow cover, soil temperature, heavy evaporation ability and increased of air temperature further decreased soil water content. Without enough water supplies, river runoff decreased in winter.
In cold regions the mechanisms of runoff generation have not yet been fully understood. In this...
Share