The Application of Budyko Theory to Hydro-climatic Classification

XU Shan-shan, JIN Yi, LIU Jin-tao, JI Hai-juan, JIANG Cheng-wei

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China Rural Water and Hydropower ›› 2017 ›› (3) : 17-20.

The Application of Budyko Theory to Hydro-climatic Classification

  • XU Shan-shan1,JIN Yi1,LIU Jin-tao1,2,JI Hai-juan1,JIANG Cheng-wei1
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Abstract

Hydro-climatic stations in Southwest China and Northeast China are adopted to discuss the feasibility of the application of the Budyko theory to hydro-climatic classification. In this study,169 stations in Southwest China and Northeast China are displayed on the Budyko curve. We discover that lots of stations in Southwest China and Northeast China fall on the same partition according to the traditional regionalization based on the dryness index. But the two regions apparently have large differences in dry-wet conditions and hydrological conditions. Thus,we introduce the evaporative index to consider the actual dry and wet conditions in basins and fit the Fu's equation that can reflect surface conditions. The research shows that the distribution of the stations in Southwest China is generally lower than Northeast China on the Budyko curve. Southwest and northeast overlapping stations are similar in hydrothermal conditions in proportion. Also,in each climatic zone,the precipitation decreases when the evaporative index increases. The results show that different locations on the Budyko curve comprehensively reflect the actual and potential hydrothermal conditions. Using Budyko theory can carry out hydro -climatic classification more effectively.

Key words

hydro-climatic classification / dryness index / evaporative index / Budyko theory

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XU Shan-shan, JIN Yi, LIU Jin-tao, JI Hai-juan, JIANG Cheng-wei. The Application of Budyko Theory to Hydro-climatic Classification. China Rural Water and Hydropower. 2017, 0(3): 17-20

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