高光谱遥感技术的铅污染监测应用研究

Hyper-spectral Application to Monitoring Plumbum Pollution of Vegetation

从高光谱技术的发展及其在植被遥感领域的应用出发,探讨了植被高光谱特征研究及其常用分析方法,对在营养胁迫情况下植物的叶绿素等变化对高光谱遥感响应的特征进行分析;归纳了获得优势应用的植被指数和导数光谱,植被光谱信息提取方法;总结了土壤遭受重金属铅污染及其对植物的影响的机理;针对遭受污染胁迫的植物的地面高光谱特征提出了利用地面高光谱遥感技术作为土壤及植物重金属污染的遥感监测手段;在探讨其应用现状的同时展望了高光谱遥感数据支撑与校验的应用前景。

Hyper-spectral technology is a revolution in remote sensing. Now hyper-spectral technology is being used well in vegetation remote sensing. Hyper-spectral characteristics of vegetation and the analysis methods are discussed. This paper emphasizes the spectrum responses of changed plant chlorophyll content caused by nutrient stresses, indicates the application dominance of vegetation indexes and derivative spectrum to extract vegetation information. The situation of internal heavy metal pollution, especially plumbum, in the soil and the mechanism of heavy metals' effect on plants are summed up. Based on the hyper-spectral characteristics of polluted vegetation brought by heavy metals in the soil, this paper puts forward that the ground hyper-spectral remote sensing can be used as a method of new style to monitor the pollution situation of heavy metals in the soil. Finally the current situation, as well as the prospects of its application in supporting and verifying hyper-spectral data upper air, is discussed.