| Cite this article: | 穆贵玲,郑江丽,王行汉,等.遥感蒸散发模型用于净灌溉水量测算的空间尺度研究[J].灌溉排水学报,0,():-. |
| MU Guiling,ZHENG Jiangli,WANG Xinghan,et al.遥感蒸散发模型用于净灌溉水量测算的空间尺度研究[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Study on Spatial Scale of Remote Evapotranspiration Model for Net Irrigation Water Measurement |
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MU Guiling, ZHENG Jiangli, WANG Xinghan, MA Zhipeng, LIU Jin
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Pearl River Hydraulic Research Institute
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| Abstract: |
| The total amount of agricultural water and the Effective Utilization Coefficient of Irrigation Water are important indicators of the most strict water resources management assessment. At present, the Remote Evapotranspiration Model is not widely used in the extraction of regional evapotranspiration and the measurement of Effective Utilization Coefficient of Irrigation Water in the Pearl River region. And its spatial applicable scale is a lack of research. Taking Guangxi as an example, this paper calculates the Net Irrigation Water consumption of different spatial scales through the Remote Evapotranspiration Model. And the results are verified with the directly measured results to obtain the spatial scale with the least error, so as to establish a more accurate, fast and effective calculation method of the Net Irrigation Water consumption. The results show that there is an obvious linear correlation between the Net Irrigation Water consumption and the remote sensing evapotranspiration in a large scale, such as Guangxi region or sub-region, and the correlation coefficient is more than 0.8. Compare the measured results with the remote sensing estimation results in Guangxi region and sub-region, the error is less than 0.5%. Therefore, in large scale areas such as Guangxi region and sub-region, the results of the Remote Evapotranspiration Model have high reliability and applicability. In large scale, the results of the Remote Evapotranspiration Model can provide scientific support for both the most strict assessment of water resources management and scientific management of agricultural water resources. |
| Key words: Remote Evapotranspiration Model; Spatial Scale; Net Irrigation Water Measurement; Most Strict Water Resources Management |
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