Estimation irrigation water requirements with derived crop coefficients for upland and paddy crops in ChiaNan Irrigation Association,Taiwan |
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| Institution: | 1. Department of Resource Environment, Leader University, Tainan 709, Taiwan;2. Department of Tourism Management, Ta Hwa Institute Technology, Chiung-Lin 307, Taiwan;3. Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei 106, Taiwan;1. Hubei Provincial Engineering Research Center of Non-Point Source Pollution Control, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China;2. Key Laboratory of Nonpoint Source Pollution Control, Ministry of Agriculture, Beijing 100081, China;3. College of Urban and Environmental Sciences, Peking University, Beijing 100871, China;4. Changjiang River Scientific Research Institute of Changjiang Water Resources Commission, Wuhan 430010, China;5. School of Resource and Environmental Science, Wuhan University, Wuhan 430079, China;1. College of Resource and Environment, Anhui Science and Technology University, No. 9 Donghua Road, Chuzhou, 233100, China;2. School of Life Sciences, International Joint Research Laboratory for Global Change Ecology, Henan University, Kaifeng, Henan, 475004, China;3. Department of Agronomy, Iowa State University, 2517 Agronomy Hall, Ames, IA, United States;4. College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China;1. Robert B. Daugherty Water for Food Global Institute, University of Nebraska, Nebraska Innovation Campus, 2021 Transformation Dr., Suite 3220, Lincoln, NE 68588, USA;2. School of Natural Resources, 806 Hardin Hall, University of Nebraska-Lincoln, Lincoln, NE 68583, USA;3. Department of Agronomy and Horticulture, 106 KCR Bldg., University of Nebraska-Lincoln, Lincoln, NE 68583, USA;1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China;2. College of Water Resources and Hydrology, Hohai University, Nanjing 210098, China;3. Department of Earth, Atmospheric and Planetary Sciences, Purdue University, West Lafayette, IN 47907, USA;4. Department of Agronomy, Purdue University, West Lafayette, IN 47907, USA;5. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;1. Civil Engineering Department, Indian Institute of Technology, Roorkee 247667, India;2. Civil Engineering Department, MBM Engineering College, Jodhpur 342011, India |
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| Abstract: | Field experiments were performed at the HsuehChia Experimental Station from 1993 to 2001 to calculate the reference and actual crop evapotranspiration, derived the crop coefficient, and collected requirements input data for the CROPWAT irrigation management model to estimate the irrigation water requirements of paddy and upland crops at the ChiaNan Irrigation Association, Taiwan. For corn, the estimated crop coefficients were 0.40, 0.78, 0.89 and 0.71 in the initial, crop development, mid-season and late-season stages, respectively. Meanwhile, the estimated crop coefficients for sorghum were 0.44, 0.71, 0.87 and 0.62 in the four stages, respectively. Finally, for soybean, the estimated crop coefficients were 0.45, 0.89, 0.92 and 0.58 in the four stages, respectively. With implementation of REF-ET model and FAO 56 Penman–Monteith method, the annual reference evapotranspiration was 1268 mm for ChiaNan Irrigation Association.In the paddy fields, the irrigation water requirements and deep percolation are 962 and 295 mm, respectively, for the first rice crop, and 1114 and 296 mm for the second rice crop. Regarding the upland crops, the irrigation water requirements for spring and autumn corn are 358 and 273 mm, respectively, compared to 332 and 366 mm for sorghum, and 350 and 264 mm for soybean. For the irrigated scheme with single and double rice cropping patterns in the ChiaNan Irrigation Association, the CROPWAT model simulated results indicate that the annual crop water demands are 507 and 1019 mm, respectively, and the monthly water requirements peaked in October at 126 mm and in January at 192 mm, respectively. |
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