洎水河流域重金属污染区五节芒叶片光谱特征响应研究  

The Spectral Response of Typical Vegetation Leaves to Heavy Metal Pollution in Jishui River Basin

作　　者：赵汀[1] 王安建[1] 夏江周[2] 刘素红[2] 

机构地区：[1]中国地质科学院矿产资源研究所,北京100037 [2]北京师范大学地理学与遥感科学学院,北京100875

出　　处：《国土资源遥感》2010年第2期49-54,共6页Remote Sensing for Land & Resources

基　　金：中央级公益性科研院所基本科研业务费项目"德兴矿集区矿山环境高精度遥感调查"(编号:K0723);国土资源部科研项目"矿产资源开发对矿山环境的影响及整治示范研究"(编号:30302408);国家自然科学基金项目(编号:40771150)联合资助

摘　　要：利用污染物富集因子和污染指数对洎水河流域采样点河滩表层土壤重金属污染状况进行评价。通过分析五节芒叶片重金属富集率,发现五节芒对Cu、Zn、Cr等金属元素有较强的吸收能力,而且,重金属富集率与河滩表层土壤的重金属污染程度呈相反的变化趋势。将五节芒叶片光谱特征参数——可见光波段（450~670 nm）反射率积分值（A1）、近红外波段（760~980 nm）反射率积分值（A2）与五节芒叶片中3种重金属（Cu、Zn、Cr）的质量分数进行相关分析,分别建立2个谱段的光谱特征参数与3种重金属质量分数的多元线性回归方程。结果表明,五节芒叶片中重金属Cu、Zn和Cr的质量分数可以很好地模拟（复相关系数R2〉0.93）五节芒叶片在重金属胁迫下的光谱特征变化。In this paper,the enrichment factors and pollution indexes of heavy metals were used to evaluate the heavy metal pollution condition of the floodplain topsoil in Jishui River.Based on the pollution indicators,the authors have reached the conclusion that all the floodplain topsoil at the sampling points has been polluted in various degrees.An analysis of heavy metal accumulation rate of Miscanthus floridulus reveals that Miscanthus floridulus has relatively strong absorption capacity for Cu,Zn and Cr.An opposite tendency is shown between the heavy metal absorption capacity of Miscanthus floridulus leaves and the heavy metal pollution condition in floodplain topsoil of the Jishui River.Furthermore,correlation analysis was made between two spectral features parameters（A1 means the integral value of visible light and A2 the integral value of near-infrared） and content of three heavy metals（Cu,Zn,Cr） in the leaves of Miscanthus floridulus.As a result,two multiple regression equations between the spectral features and the content of three heavy metals were established.The result shows that the content of three heavy metals（Cu,Zn,Cr） in the leaves of Miscanthus floridulus is effective（R20.93） in modeling the spectral feature change of Miscanthus floridulus leaves under the severe impact of heavy metals.

关 键 词：重金属污染 污染指标 光谱特征参数 多元线性回归 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]