潘志强, 刘高焕, 周成虎. 基于遥感的黄河三角洲农作物需水时空分析[J]. 水科学进展, 2005, 16(1): 62-68.
引用本文: 潘志强, 刘高焕, 周成虎. 基于遥感的黄河三角洲农作物需水时空分析[J]. 水科学进展, 2005, 16(1): 62-68.
PAN Zhi-qiang, LIU Gao-huan, ZHOU Cheng-hu. Temporal and spatial analysis of water demand of crops in Yellow River Delta based on remote sensing[J]. Advances in Water Science, 2005, 16(1): 62-68.
Citation: PAN Zhi-qiang, LIU Gao-huan, ZHOU Cheng-hu. Temporal and spatial analysis of water demand of crops in Yellow River Delta based on remote sensing[J]. Advances in Water Science, 2005, 16(1): 62-68.

基于遥感的黄河三角洲农作物需水时空分析

Temporal and spatial analysis of water demand of crops in Yellow River Delta based on remote sensing

  • 摘要: 以黄河三角洲为研究区域,系统地提出了用多种分辨率遥感影像进行区域蒸散反演,结合气象数据,进行不同时空条件下农作物需水的分析.通过反演地表反照率、地表温度、地表比辐射系数等参数,进一步计算出地表净辐射通量、土壤热通量、显热通量,根据地表能量平衡方程进行了蒸散的遥感反演;利用5个时相的NOAAAVHRR数据和一个时相的TM数据反演了1999年7~9月的蒸散,并利用TM影像反演的蒸散结果,提高了NOAA气象卫星蒸散反演结果的空间分辨率,大大增加了遥感蒸散反演的实用性.利用6个时相的遥感数据反演的蒸散结果及计算的日潜在蒸散数据对1999年7~9月黄河三角洲各灌区农作物的需水总量进行了时空分析.

     

    Abstract: In this paper Yellow River Delta is selected as the research area,and the temporal and spatial analysis method for water demand of crops is brought out which based on the regional evapotranspiration(ET) retrieval using remote sensing method with the help of meteorological data.Firstly,the remote sensing method based on surface energy balance equation which is a function of net radiance flux,soil heat flux,sensible heat flux and latent heat flux is used to retrieve ET.Five NOAA AVHRR images and one landsat TM image are selected to retrieve ET from July to September of 1999,and the ET retrieval map of TM is used to improved the spatial resolution of the ET retrieval map of NOAA AVHRR,so less TM images and more NOAA AVHRR images can be used to retrieve regional ET,which can improve the practicability of ET retrieval method based on Remote Sensing.Secondly,the ET retrieved maps of the 6 images combined to the reference ET result which is computed using meteorological data are used for the temporal and spatial analysis of total water demand of crops in different irrigation regions of Yellow River Delta from July to September of 1999.

     

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