Maximum and Actual Evapotranspiration for Barley (Hordeum vulgare L.) through NOAA Satellite Images in Castilla-La Mancha,Spain |
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| Affiliation: | 1. Department of Plant Production and Agricultural Technology, University of Castilla-La Mancha, 02071-Albacete, Spain;2. Department of Thermodynamics, University of Valencia, 46100-Valencia, Spain;1. Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland;2. King’s College University of London, Faculty of Life Sciences & Medicine, London, United Kingdom;3. Université Savoie Mont Blanc, Annecy, France;4. Vrije Universiteit Amsterdam, Department of Computer Science, Social AI Group, Amsterdam, Netherlands;1. State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau SAR, China;2. State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, 210093, China;3. Department of Chemistry, CICECO – Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal;4. National Resource Center for Mutant Mice, Nanjing, 210093, China;5. Department of Pharmaceutical Sciences, Faculty of Health Science, University of Macau, Taipa, Macau SAR, China;6. Zhuhai UM Science and Technology Research Institute (ZUMRI), University of Macau, Hengqin, China;7. Chemistry and Biomedicine Innovative Center, Nanjing University, Nanjing, Jiangsu, 210023, China;1. Center for Agricultural Water Research in China, China Agricultural University, Beijing 100083, China;2. Qianyanzhou Ecological Research Station, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China |
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| Abstract: | An easy-to-follow methodology is developed for the assessment of regional evapotranspiration in Castilla-La Mancha, a semi-arid region of Spain. The methodology is applied to barley crops to monitor the irrigation scheduling over the region, by using remote sensing techniques supplemented by ground measurements. The methodology can be based on either of two models. In the first one, established by Caselles and Delegido,1the reference evapotranspiration,ETo, derives from the expressionETo=ARg(Ta)max+BRg+CwhereA, BandCare empirical coefficients, depending on climatic parameters and determined for each region;Rgis the daily global radiation; and (Ta)maxis the maximum air temperature. The second model, proposed by Jacksonet al.,2considers the actual evapotranspirationER=Rn+D(Ta−Ts) whereRn, is the net radiation,TaandTsare the air and crop surface temperatures, respectively, andDis a semi-empirical coefficient. Both methods were compared with the method of Penman (considered standard), and resulted in differences of ±1 mm d−1. The developed methodology has been applied to map the reference and the actual evapotranspiration over a 10×10 km area, using the thermal-infrared information provided by the AVHRR (advanced very high resolution radiometer) sensor on board the NOAA (national oceanic atmosphere administration) satellite on a selected date. |
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