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| DOI： |
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| Comparison of Different Methods for Calculating Evapotranspiration of Crops in the Yellow River Delta |
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YIN Chunyan, CHEN Xiaobing, LIU Hu, SHAN Jingjing, BU Fanmin, WANG De, SUN Haishuang
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Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; University of Chinese Academy of Sciences, Beijing 100049, China; Institute of Water Resources for Pastoral Area Ministry of Water Resources, Hohhot 010020, China； Yantai Institute of Coastal Zone Research Chinese Academy of Sciences, Yantai 264003, China; Shandong Coastal Saline Soil and Water Environmental Engineering Research Center, Dongying 257000, China; Shandong Huibangbohai Agriculture Development Limited Company, Dongying 257091, China
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| Abstract: |
| Accurately calculating crop evapotranspiration (ET0) is important in designing water-saving irrigation schedule. This paper compared five methods: the P-M method，FAO-79Penman，Priestley-Taylor, FAO-24Penman and Hargreaves-Samani, for calculating evapotranspiration of crops in the Yellow River delta using data measured at four weather stations in the region. We took the P-M method as the control to to evaluate the other methods. The results showed that the FAO-Penman was more accurate than Priestley-Taylor in all climatic regions, with errors between 3% and 10%. If there are no sufficient data in humid regions, however, the Priestley-Taylor works better giving more reliable ET0 estimates. |
| Key words: reference evapotranspiration; P-M method; the Yellow River delta; Priestley-Taylor method |
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