| 引用本文: | 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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| 摘要: |
| 农业用水总量和灌溉水有效利用系数是最严格水资源管理考核总量红线和效率红线控制的重要指标。目前遥感蒸散发模型在珠江片区域蒸散发量提取和灌溉水有效利用系数测算的应用度不高,对其空间适用尺度缺乏研究。以广西区为例,通过试验观测-遥感解译等遥感技术计算不同空间尺度净灌溉用水量,并与直接量测的净灌溉水量相互验证,得出误差最小的空间尺度,从而建立一套更准确、快速、有效的最优空间尺度下区域净灌溉水量测算方法。结果表明,在较大的广西区、片区尺度,净灌溉用水量和遥感蒸散发量之间存在明显的线性相关关系,相关系数在0.8以上；对比广西区和桂中片区实测结果与遥感估算结果,误差均在0.5%以内。因此,在片区和广西区等较大尺度,遥感测算结果的可信度较高,遥感蒸散发模型适用性较强,其测算结果可为最严格水资源管理考核和农业水资源科学管理提供科学支撑。 |
| 关键词: 遥感蒸散发模型;空间尺度;净灌溉水量测算;最严格水资源管理 |
| DOI： |
| 分类号:S27 |
| 基金项目: |
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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 |
