| 孙世坤,蔡焕杰,王健.基于CROPWAT模型的非充分灌溉研究[J].干旱地区农业研究,2010,28(1):27~33 |
| 基于CROPWAT模型的非充分灌溉研究 |
| Study on deficit irrigation based on CROPWAT model |
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| DOI：10.7606/j.issn.1000-7601.2010.01.06 |
| 中文关键词: 非充分灌溉 CROPWAT模型 模拟 |
| 英文关键词:deficit irrigation CROPWAT model simulation |
| 基金项目:国家“863”计划重点项目(2006AA100202)；国家科技支撑计划(2007BAD88B10) |
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| 中文摘要: |
| 为验证FAO的CROPWAT模型在非充分灌溉中的适用性和精确性，将民勤棉花和春小麦非充分灌溉的试验方案及当地气象资料输入模型，分析CROPWAT模型在模拟作物蒸发蒸腾量和非充分灌溉对产量影响的模拟效果。结果显示，棉花各生育期日平均蒸发蒸腾量的模拟值和实测值表现出相同的分布规律，但模拟值整体高于实测值0.15～1 mm；模拟非充分灌溉对棉花和春小麦产量的影响时，模拟值和实测值显示出一致的变化规律，将结果进行统计分析，棉花和春小麦的RMSE、EF、CRM分别为20.62%和10.35%、0.98和0.856、-0.00051和-0.0155，说明CROPWAT模型总体模拟效果较好，但模型的执行值较实测值偏高。模拟结果表明，模型在非充分灌溉的研究中有着较好的适用性，但为了使模拟结果更准确，使用前需根据当地实测资料对Kc、Ky等参数进行校正。 |
| 英文摘要: |
| In order to verify the applicability and accuracy of FAO CROPWAT model in deficit irrigation study, both the deficit irrigation experimental scheme of cotton and spring wheat and the local meteorological data w
ere input into the model. Then, analysis was made of the simulation effect of the application of CROPWAT model study in crop evapotranspiration and the impact of deficit irrigation on crop yield. The results showed that the simulated values and measured values of cotton's daily evapotranspiration showed the same distribution regulation, but the simulated values were 0.15～1 mm higher than the measured ones as a whole; the simulation of the impact of deficit irrigation on cotton and spring wheat yield indicated that the simulated values and measured values showed the same tendency, and the statistical analysis of the results showed that the RMSE、EF and CRM of cotton and spring wheat were 20.62% and 10.35%; 0.98 and 0.856; -0.00051 and -0.0155 respectively, it meant that the simulated effect of CROPWAT model was preferably well, but the stimulated values were higher than measured values in general. Simulation results show that the model is applicable in deficit irrigation study, however, in order to obtain more accurate simulation results, it is necessary to correct the Kc and Ky parameters before using the model. |
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