基于SEBAL模型和环境卫星的区域蒸散发量及灌溉水利用系数估算研究
【目的】探索基于遥感技术建立准确快捷评估区域蒸散发量和灌溉水利用系数的方法。【方法】以河套灌区义长灌域为研究区,基于SEBAL(Surface Energy Balance Algorithm for Land)模型和较高时空分辨率的环境卫星影像,建立了SEBAL遥感蒸散发估算模型,并与降水量、灌水量和地下水位数据结合,计算了研究区的灌溉水利用系数。【结果】SEBAL模型反演的作物蒸散发量的平均绝对误差在5%以内;2013—2017年研究区灌溉水利用系数在0.427~0.572之间,平均值0.492,高于河套灌区的平均水平。人民支渠区的灌溉水利用系数在0.447~0.688之间,均值为0.51...
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| Published in | Guanʻgai paishui xuebao Vol. 40; no. 8; pp. 136 - 144 |
|---|---|
| Main Authors | , , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
Xinxiang City
Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage
01.08.2021
武汉大学 水资源与水电工程科学国家重点实验室,武汉 430072%河套灌区义长灌域管理局,内蒙古 巴彦淖尔 015100 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1672-3317 |
| DOI | 10.13522/j.cnki.ggps.2020578 |
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| Abstract | 【目的】探索基于遥感技术建立准确快捷评估区域蒸散发量和灌溉水利用系数的方法。【方法】以河套灌区义长灌域为研究区,基于SEBAL(Surface Energy Balance Algorithm for Land)模型和较高时空分辨率的环境卫星影像,建立了SEBAL遥感蒸散发估算模型,并与降水量、灌水量和地下水位数据结合,计算了研究区的灌溉水利用系数。【结果】SEBAL模型反演的作物蒸散发量的平均绝对误差在5%以内;2013—2017年研究区灌溉水利用系数在0.427~0.572之间,平均值0.492,高于河套灌区的平均水平。人民支渠区的灌溉水利用系数在0.447~0.688之间,均值为0.516。研究区地下水补给量均值为52.13 mm,约占灌水量的3%~7%,忽略地下水补给量会对灌溉水利用系数准确计算带来0.03~0.08的误差。【结论】基于SEBAL遥感蒸散发模型快速测算了灌溉水利用系数,计算结果具有较好的精度和可信度。模型尺度差异性较小,在不同空间尺度的适用性较好。 |
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| AbstractList | 【目的】探索基于遥感技术建立准确快捷评估区域蒸散发量和灌溉水利用系数的方法。【方法】以河套灌区义长灌域为研究区,基于SEBAL(Surface Energy Balance Algorithm for Land)模型和较高时空分辨率的环境卫星影像,建立了SEBAL遥感蒸散发估算模型,并与降水量、灌水量和地下水位数据结合,计算了研究区的灌溉水利用系数。【结果】SEBAL模型反演的作物蒸散发量的平均绝对误差在5%以内;2013—2017年研究区灌溉水利用系数在0.427~0.572之间,平均值0.492,高于河套灌区的平均水平。人民支渠区的灌溉水利用系数在0.447~0.688之间,均值为0.516。研究区地下水补给量均值为52.13 mm,约占灌水量的3%~7%,忽略地下水补给量会对灌溉水利用系数准确计算带来0.03~0.08的误差。【结论】基于SEBAL遥感蒸散发模型快速测算了灌溉水利用系数,计算结果具有较好的精度和可信度。模型尺度差异性较小,在不同空间尺度的适用性较好。 TV93; [目的]探索基于遥感技术建立准确快捷评估区域蒸散发量和灌溉水利用系数的方法.[方法]以河套灌区义长灌域为研究区,基于SEBAL(Surface Energy Balance Algorithm for Land)模型和较高时空分辨率的环境卫星影像,建立了SEBAL遥感蒸散发估算模型,并与降水量、灌水量和地下水位数据结合,计算了研究区的灌溉水利用系数.[结果]SEBAL模型反演的作物蒸散发量的平均绝对误差在5%以内;2013—2017年研究区灌溉水利用系数在0.427~0.572之间,平均值0.492,高于河套灌区的平均水平.人民支渠区的灌溉水利用系数在0.447~0.688之间,均值为0.516.研究区地下水补给量均值为52.13 mm,约占灌水量的3%~7%,忽略地下水补给量会对灌溉水利用系数准确计算带来0.03~0.08的误差.[结论]基于SEBAL遥感蒸散发模型快速测算了灌溉水利用系数,计算结果具有较好的精度和可信度.模型尺度差异性较小,在不同空间尺度的适用性较好. |
| Author | YANG, Liqing CHANG Zhifu ZHANG, Xiaochun LIU, Hui HAN, Xudong LIU Xinjingyu WANG Xiugui |
| AuthorAffiliation | 武汉大学 水资源与水电工程科学国家重点实验室,武汉 430072%河套灌区义长灌域管理局,内蒙古 巴彦淖尔 015100 |
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| Author_FL | YANG Liqing CHANG Zhifu HAN Xudong LIU Hui LIU Xinjingyu ZHANG Xiaochun WANG Xiugui |
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| Copyright | Copyright Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage 2021 Copyright © Wanfang Data Co. Ltd. All Rights Reserved. |
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| SubjectTerms | Algorithms Classification Corn Decision trees Digital Elevation Models Efficiency Energy balance Error analysis Estimation Evaluation Evapotranspiration Groundwater Groundwater data Groundwater irrigation Groundwater recharge Helianthus annuus Hydrologic data Irrigation Irrigation efficiency Irrigation water Landsat Meteorological data Parameter identification Rainfall Remote sensing Sunflowers Surface energy Surface properties Triticum aestivum Water consumption Water use Water use efficiency Wheat Zea mays |
| Title | 基于SEBAL模型和环境卫星的区域蒸散发量及灌溉水利用系数估算研究 |
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