基于HRS和GIS的城市污染场地动态监测原理分析

选择有代表性的城市场地,运用网格法土壤采样,并通过实验室化学分析得出土壤的重金属等污染物质含量,运用地物光谱仪在实验室设定条件下测定土壤反射光谱,应用偏最小二乘法（PLS）建立高光谱遥感（HRS）影像定量反演模型,预测场地土壤中各种污染物的含量,并在遥感影像中直观表示。结果表明,HRS技术能提供大量、连续性的光谱信息;PLS模型为大尺度城市场地污染快速评价与监测提供了可能性;并通过结合G IS技术可实现城市污染场地的动态监测,为城市公共管理提供决策支持。

TheoreticalAnalysisofDynam icM onitoring ofUrban Contam inated SitesBased on HRS and GIS

Topical urban sites were chosen for soil sampling with pollutant levels identified by chemical analysis in lab,and soil spectral reflectivity was measured by portable spectrometer in setting condition.The Partial Least Squares Regression(PLS) was used to build quantificational models of HRS images to predict the contamination content of urban soil.The results showed that HRS provided much and continuous spectral information for fast monitoring and evaluation of urban soil contamination in the large-scale,an...