区域蒸发量的遥感研究现状及发展趋势

Survey and Headway of Study on Remote Sensing Remote Sensing Regional Evaporation

遥感手段是解决区域蒸发量分布问题的重要方法。随着遥感和GIS技术的发展,定量遥感模型从大叶模型发展到两层、多层或多源模型,参数反演是其核心内涵,出现了比较系统的参数反演公式,但在参数反演时一般都需要风速、温度等参数,这些参数用遥感手段比较难以获得,这就限制了定量遥感模型的广泛应用,因此研究仅依靠遥感信息反演地表通量的定量模型是今后定量遥感模型的主要发展趋势。

It is an important method to estimate land surface evaporation of large region by using remote sensing data. With the development of remote sense and GIS technology, remote sensing evaporation model evolved from one-layer to two-layer model and four layer model. It introduces some remote sensing models of land surface evaporation such as surface energy balance system (SEBS), complementary Relationship (CR) and simplified surface energy balance index (S-SEBI), etc, and the retrial of land surface parameters is the model's main connotation from remote sensing data. The methods to derive land surface parameters such as impedance always need non-remote sensing data such as wind speed, temperature, so they restrict their application in water resources at large. Now the headway of remote sensing model is to derive land surface flux only by fully using remote sensing data.