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Evaluation of the applicability of climate forecast system reanalysis weather data for hydrologic simulation: A case study in the Bahe River Basin of the Qinling Mountains, China

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Abstract

In recent years, global reanalysis weather data has been widely used in hydrological modeling around the world, but the results of simulations vary greatly. To consider the applicability of Climate Forecast System Reanalysis (CFSR) data in the hydrologic simulation of watersheds, the Bahe River Basin was used as a case study. Two types of weather data (conventional weather data and CFSR weather data) were considered to establish a Soil and Water Assessment Tool (SWAT) model, which was used to simulate runoff from 2001 to 2012 in the basin at annual and monthly scales. The effect of both datasets on the simulation was assessed using regression analysis, Nash-Sutcliffe Efficiency (NSE), and Percent Bias (PBIAS). A CFSR weather data correction method was proposed. The main results were as follows. (1) The CFSR climate data was applicable for hydrologic simulation in the Bahe River Basin (R 2 of the simulated results above 0.50, NSE above 0.33, and |PBIAS| below 14.8. Although the quality of the CFSR weather data is not perfect, it achieved a satisfactory hydrological simulation after rainfall data correction. (2) The simulated streamflow using the CFSR data was higher than the observed streamflow, which was likely because the estimation of daily rainfall data by CFSR weather data resulted in more rainy days and stronger rainfall intensity than was actually observed. Therefore, the data simulated a higher base flow and flood peak discharge in terms of the water balance, except for some individual years. (3) The relation between the CFSR rainfall data (x) and the observed rainfall data (y) could be represented by a power exponent equation: y=1.4789x 0.8875 (R 2=0.98, P<0.001). There was a slight variation between the fitted equations for each station. The equation provides a theoretical basis for the correction of CFSR rainfall data.

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Authors and Affiliations

  1. College of Urban and Environmental Science, Northwest University, Xi’an, 710127, China

    Sheng Hu, Haijun Qiu, Dongdong Yang, Mingming Cao, Jinxi Song, Jiang Wu & Chenlu Huang

  2. Institute of Earth Surface System and Hazards, Northwest University, Xi’an, 710127, China

    Sheng Hu, Haijun Qiu, Dongdong Yang, Mingming Cao, Jinxi Song, Jiang Wu & Chenlu Huang

  3. Shaanxi Provincial Land Engineering Construction Group, Xi’an, 710175, China

    Yu Gao

Authors
  1. Sheng Hu
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  2. Haijun Qiu
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  3. Dongdong Yang
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  4. Mingming Cao
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  5. Jinxi Song
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  6. Jiang Wu
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  7. Chenlu Huang
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  8. Yu Gao
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Corresponding author

Correspondence to Haijun Qiu.

Additional information

Foundation: International Partnership Program of Chinese Academy of Sciences, No.131551KYSB20160002; National Natural Science Foundation of China, No.41401602; Natural Science Basic Research Plan in Shaanxi Province of China, No.2014JQ2-4021; Key Scientific and Technological Innovation Team Plan of Shaanxi Province, No.2014KCT-27; Graduate Student Innovation Project of Northwest University, No.YZZ15011

Hu Sheng (1988–), PhD Candidate, specialized in hydrology, water resources, and geological disasters.

Qiu Haijun, Associate Professor, specialized in geological disasters.

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Hu, S., Qiu, H., Yang, D. et al. Evaluation of the applicability of climate forecast system reanalysis weather data for hydrologic simulation: A case study in the Bahe River Basin of the Qinling Mountains, China. J. Geogr. Sci. 27, 546–564 (2017). https://doi.org/10.1007/s11442-017-1392-6

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  • DOI: https://doi.org/10.1007/s11442-017-1392-6

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