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Proc. IAHS, 379, 13-19, 2018
https://doi.org/10.5194/piahs-379-13-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Pre-conference publication
05 Jun 2018
Hydrological regionalisation based on available hydrological information for runoff prediction at catchment scale
Qiaoling Li1, Zhijia Li1, Yuelong Zhu2, Yuanqian Deng1, Ke Zhang1, and Cheng Yao1 1College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China
2College of Computer and Information, Hohai University, Nanjing, 210098, China
Abstract. Regionalisation provides a way of transferring hydrological information from gauged to ungauged catchments. The past few decades has seen several kinds of regionalisation approaches for catchment classification and runoff predictions. The underlying assumption is that catchments having similar catchment properties are hydrological similar. This requires the appropriate selection of catchment properties, particularly the inclusion of observed hydrological information, to explain the similarity of hydrological behaviour. We selected observable catchments properties and flow duration curves to reflect the hydrological behaviour, and to regionalize rainfall-runoff response for runoff prediction. As a case study, we investigated 15 catchments located in the Yangtze and Yellow River under multiple hydro-climatic conditions. A clustering scheme was developed to separate the catchments into 4 homogeneous regions by employing catchment properties including hydro-climatic attributes, topographic attributes and land cover etc. We utilized daily flow duration curves as the indicator of hydrological response and interpreted hydrological similarity by root mean square errors. The combined analysis of similarity in catchment properties and hydrological response suggested that catchments in the same homogenous region were hydrological similar. A further validation was conducted by establishing a rainfall-runoff coaxial correlation diagram for each catchment. A common coaxial correlation diagram was generated for each homogenous region. The performances of most coaxial correlation diagrams met the national standard. The coaxial correlation diagram can be transferred within the homogeneous region for runoff prediction in ungauged catchments at an hourly time scale.
Citation: Li, Q., Li, Z., Zhu, Y., Deng, Y., Zhang, K., and Yao, C.: Hydrological regionalisation based on available hydrological information for runoff prediction at catchment scale, Proc. IAHS, 379, 13-19, https://doi.org/10.5194/piahs-379-13-2018, 2018.
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