| Suitability comparison of different ET0 estimating methods in eastern part of Inner Mongolia |
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| DOI：10.7606/j.issn.1000-7601.2016.01.06 |
| Key Words: reference crop evapotranspiration ET0 calculation method Irmark-Allen fitting method eastern part of Inner Mongolia |
| Author Name | Affiliation | | TANG Peng-cheng | Institute of Water Resources for Pasture Area of IWHR, Hohhot, Inner Mongolia 010020, China | | HE Meng | Hebei Institute of Water Conservancy Scientific Research, Shijiazhuang, Hebei 050000, China | | MIAO Shu | Institute of Water Resources for Pasture Area of IWHR, Hohhot, Inner Mongolia 010020, China | | GUO Ke-zhen | Institute of Water Resources for Pasture Area of IWHR, Hohhot, Inner Mongolia 010020, China | | REN Jie | Institute of Water Resources for Pasture Area of IWHR, Hohhot, Inner Mongolia 010020, China | | WANG Hai-rui | Water Conservancy and Civil Engineering College, Inner Mongolia Agricultural University Hohhot, Inner Mongolia 010020, China |
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| Abstract: |
| In eastern part of Inner Mongolia, the land resource is rich, but fewer meteorological station and lack of related meteorological data, so application of FAO56 Penman-Monteith method to calculate ET0 in most areas is rather difficult. This paper according to the 40 a (1974—2013) meteorological data from typical meteorological station (Tongliao) in eastern part of Inner Mongolia, taking FAO56 Penman-Monteith formula as the standard and FAO-17 Penman method, Priestley-Taylor method, Hargreaves-Samani method, Irmark-Allen fitting method as control, calculated the ET0 respectively. At the same time, carried out the relativity analysis with the FAO56 Penman-Monteith method. The results showed that: The calculation results by Priestley-Taylor method and Hargreaves-Samani method were obviously higher than the FAO56 Penman-Monteith method, so these two methods were not suitable to use in eastern part of Inner Mongolia. The correlation was the best by FAO-17 Penman method, but the relative error in April to September was rather big. The calculation result by Irmark-Allen fitting method was the most close to the FAO56 Penman-Monteith method (relative error＜19%，correlation coefficient R2＞0.92), which needs less meteorological data and simple calculation. Therefore, the Irmark-Allen fitting method is more suitable to calculate the ET0 in eastern part of Inner Mongolia which is lack meteorological data. |
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