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| DOI：10.13522/j.cnki.ggps.2017.11.015 |
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| Reference Evapotranspiration and the Factors Affecting It in Fenhe Irrigation District |
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LI Haijun, LIU Haijun, ZHANG Zhijun
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Authority of Fenhe Basin of Shanxi Province, Taiyuan 030002, China,; College of Water Sciences, Beijing Norman University, Beijing 100875, China
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| Abstract: |
| Climate change has a great impact on hydrological cycle and water resource management in catchments. Under standing the change in reference evapotranspiration (ET0) in a catchment can improve its water resource management. In this paper, the change of ET0 in Fenhe Irrigation District and the factors affecting it were analyzed using long-term climatic data in this region. The results showed that the annual ET0 in Fenhe Irrigation District did not show a significant (P＞0.05) change from 1951 to 2014, because the positive effect of the increased temperature and decreased relative humidity on ET0 was compensated for by the negative effect due to the decreased wind speed and sunshine time. Changes in temperature, relative humidity and wind speed affected ET0 considerably from April to June, while sunshine hours impacted ET0 from May to September. Our results can help to efficiently allocate water resources in Fenhe Irrigation District as well asin the Fen River basin. |
| Key words: Fenhe irrigation district; climate change; reference evapotranspiration; change trend; sensitive analysis |
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