基于HJ1A-HSI的龙口污水灌溉区土壤重金属含量反演  

Quantitative Retrieval of Soil Heavy Metal Content in Longkou Wastewater Irrigation Area Based on HJ1A-HSI Images

作　　者：蔡东全 吴泉源[1] 曹学江 蒙永辉 周历媛 刘硕[1] 张龙龙[1] 

机构地区：[1]山东师范大学人口.资源与环境学院,山东济南250014 [2]山东省煤田地质规划勘察研究院,山东泰安271000 [3]山东省地质环境监测总站,山东济南250014

出　　处：《安全与环境工程》2015年第5期33-39,共7页Safety and Environmental Engineering

基　　金：国家自然科学基金项目(41371395);国家科技支撑计划项目(2012BAB11B01);龙口矿区及周边海岸带遥感监测研究项目(鲁勘字[2012]110号);海(咸)水入侵典型区数值模型与预警预报系统开发建设项目(SDZS-2015-DHJ01)

摘　　要：污水灌溉在一定程度上减轻了农业用水问题,但是也造成了重金属元素的积累。以HSI高光谱遥感影像为数据源,利用地理信息系统和偏最小二乘回归(PLSR)分析方法,并结合实地采样检测的土壤重金属含量数据,分析了重金属离子在HSI数据中的光谱特征,建立了土壤重金属含量与高光谱数据的偏最小二乘回归模型,实现了对龙口污水灌溉区土壤重金属含量的反演研究。结果表明:原始光谱数据经过一定的光谱变换后,就建模效果而言,Cu的建模效果最好,判定系数(R2)高达0.965 5,Mn、Ni和Pb的建模效果较好,R2分别为0.927 3、0.910 4和0.912 7;验证样本中,Mn的R2为0.9128,说明该模型对Mn的反演能力最强,As、Cu和Ni的模型反演能力相当,R2分别为0.727 6、0.780 4和0.733 3。基于HJ1A-HSI数据并结合PSLR方法反演龙口污水灌溉区土壤重金属含量具有方法可行性与结果的可靠性。Wastewater irrigation can alleviate water problems in agriculture to some extent,but it causes the accumulation of heavy metals.This paper adopts the HSI hyperpectral remote sensing images as the data source using geographic information system and PLSR analysis method.Combining with concentration data of heavy metals through field sampling and monitoring,this paper analyzes spectral characteristics of heavy metal ions in HSI data,and establishes the equation between concentration data of heavy metals and hyperspectral data to achieve the quantitative retrieval of soil heavy metals contents in Longkou wastewater irrigation area.After spectral transformations of the original spectral data,Cu element is optimal in terms of modeling performance,with the determination coefficient(R2)up to 0.965 5;Mn,Ni and Pb are suboptimal with the R2 values of 0.927 3,0.910 4and 0.912 7,respectively.In validation samples,the R2 of Mn is 0.912 8,indicating the best retrieval performance.And then it is followed by As,Cu and Ni,with the R2 values of 0.727 6,0.780 4and 0.733 3,respectively.Therefore,it is feasible and reliable to retrieve soil heavy metal contents in Longkou wastewater irrigation area by using the data of HJ1 AHSI and method of PSLR.

关 键 词：土壤重金属 HSI 偏最小二乘回归 污水灌溉区 

分 类 号：X53[环境科学与工程—环境工程]