MODIS数据湿地组分蒸散遥感模型

doi:10.7523/j.issn.2095-6134.2009.3.011

中国科学院大学学报 ›› 2009, Vol. 26 ›› Issue (3): 364-372.DOI: 10.7523/j.issn.2095-6134.2009.3.011

MODIS数据湿地组分蒸散遥感模型

梁文广¹, 赵英时¹, 周霞^1,2, 刘茜¹

1. 中国科学院研究生院资源与环境学院, 北京 100049;
2. 广州地理所, 广州 510070

收稿日期:2008-09-08 修回日期:2009-02-19 发布日期:2009-05-15
通讯作者: 梁文广
基金资助:
supported by the National Natural Science Foundation of China(40571116) 

Remote sensing model of component evapotranspiration in wetland using MODIS data

LIANG Wen-Guang¹, ZHAO Ying-Shi¹, ZHOU Xia^1,2, LIU Qian¹

1. College of Resources and Environment, Graduate University, Chinese Academy of Sciences, Beijing 100049,China;?;
2. Institute of Geography in Guangzhou, Guangzhou 510070,China

Received:2008-09-08 Revised:2009-02-19 Published:2009-05-15
Supported by:
supported by the National Natural Science Foundation of China(40571116) 

摘要/Abstract

摘要：

针对鄱阳湖地区湿度大且地表复杂多变的特点,从地表能量平衡出发,简化了陆-气相互作用的复杂过程,通过分析影响湿地蒸散的关键因子,建立了基于组分净辐射、组分土壤热通量、组分温度的湿地组分蒸散遥感模型.利用MODIS数据对鄱阳湖湿地的蒸散进行试验,根据TM分类图像得到了基于MODIS数据的1km各地类组分比率图像;在计算组分净辐射时,充分考虑到不同地表组分间对净辐射的作用差异,用组分比率、组分温度和组分反照率得到了各组分净辐射;在此基础上,得到了鄱阳湖湿地蒸散的分布.通过用余项法、实测数据和历史资料对新模型反演结果进行验证,结果表明,该模型能比较客观地反映鄱阳湖湿地蒸散分布状况.

关键词: 组分蒸散, 鄱阳湖湿地, MODIS数据, 遥感模型

Abstract:

The study area "Poyang Lake area" is referred to humid environment and complex land coverage. In this paper, a component evapotranspiration model for wetland is developed based on component net radiance flux, component soil heat flux and component temperature through simplifying the complex processes of land-atmosphere interaction and analyzing vital factors which influence regional evapotranspiration. In the experiment the MODIS component proportion images with the 1km pixel are created according to TM classified images. Considering the difference of effect caused by different components on net radiance flux, the component net radiance flux is calculated using component proportion, component temperature and component albedo. The daily evapotranspiration distribution in Poyang Lake wetland is finally obtained. The new model is validated using residual method, field surveying data and history meteorological data. The result shows that the evapotranspiration acquired by the new model in Poyang Lake wetland is credible, and it can reflect the distribution of evapotranspiration in wetland objectively.

Key words: component evapotranspiration, Poyang Lake wetland, MODIS data, remote sensing model

中图分类号:

梁文广, 赵英时, 周霞, 刘茜. MODIS数据湿地组分蒸散遥感模型[J]. 中国科学院大学学报, 2009, 26(3): 364-372.

LIANG Wen-Guang, ZHAO Ying-Shi, ZHOU Xia, LIU Qian. Remote sensing model of component evapotranspiration in wetland using MODIS data[J]. , 2009, 26(3): 364-372.

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MODIS数据湿地组分蒸散遥感模型

Remote sensing model of component evapotranspiration in wetland using MODIS data

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