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 inGuanʻgai paishui xuebao Vol. 40; no. 8; pp. 136 - 144
Main Authors LIU Xinjingyu, HAN, Xudong, ZHANG, Xiaochun, WANG Xiugui, YANG, Liqing, CHANG Zhifu, LIU, Hui
Format Journal Article
LanguageChinese
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
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ISSN1672-3317
DOI10.13522/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。
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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CHANG Zhifu
HAN Xudong
LIU Hui
LIU Xinjingyu
ZHANG Xiaochun
WANG Xiugui
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灌溉水利用系数
SEBAL模型
环境卫星
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PublicationTitle_FL Journal of Irrigation and Drainage
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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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Snippet 【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...
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...
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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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