中文摘要：

为了解五节芒叶片光谱特征参数对河滩表层土重金属污染响应特征的流域差异,分别在乐安江两支流采集河滩表层土和五节芒叶片样本并测量五节芒叶片光谱。利用污染物富集因子和污染指数对两支流河滩表层土壤重金属污染状况和特征进行对比,并结合采矿点分布和矿种分析两支流河滩表层土污染成因。将五节芒叶片光谱特征参数、可见光波段反射率积分值（A1）和近红外波段反射率积分值（A2）分别与五节芒叶片中重金属含量进行回归分析,结果表明：1）大坞河五节芒叶片光谱特征参数对单一重金属Cu有较好的响应,而在洎水河五节芒叶片光谱特征参数受多种重金属共同影响。这与两支流河滩表层土重金属污染特征一致,并且重金属污染特征与采矿点分布和矿种关系密切。2）乐安江两支流五节芒叶片光谱特征参数均能反映流域河滩表层土的重金属污染规律。在今后的矿山环境调查中应将联系紧密的流域作为一个整体进行研究,加强流域对比。

英文摘要：

To find out the difference of the relationships between heavy metals pollution and spectral characteristics of leaves of Miscanthus floridulus in the two tributaries of Le′an River and then provide scientific basis for mine environment investigation,heavy metals enrichment factor and pollution index of heavy metals had been used to evaluate the heavy metals pollution condition of the floodplain topsoils.Through the analysis of drainage region,the mining points which lead to the pollution of the two rivers have been found out.Furthermore,the connection between the two spectral characteristics（A1 is the integration of visible light band,A2 is the integration of near-infrared band） and heavy metals content of the leaves of Miscanthus floridulus had been discussed respectively.And regression equations between the spectral characteristics and the content of heavy metals had been established.Results indicate that leaves spectral characteristics of Miscanthus floridulus at Dawu River Basin are mainly affected by Cu,but they are affected by several kinds of heavy metals at Jishui River Basin.Conclusions shows that leaves spectral characteristics of Miscanthus floridulus can reflect the heavy metals pollution characteristic of the floodplain topsoils at the two tributaries of Le′an River.It is proposed that in the future mine environment survey should take the related river basins as an entirety and strengthen contrast research of river basins.