The spatial distribution characteristics of six heavy metals and metalloid in soil of Zhuji Lipu copper mining area, Zhejiang Province, was studied by using geostatistics approaches combined with GIS. These elements i...The spatial distribution characteristics of six heavy metals and metalloid in soil of Zhuji Lipu copper mining area, Zhejiang Province, was studied by using geostatistics approaches combined with GIS. These elements included Pb, As, Cr, Cu, Zn and Ni. The statistical analyses showed that concentrations of these elements were lognormal distribution. Concentrations of Pb, As, Cu, Zn and Ni were strongly correlated with each other indicating that these elements in soils may be from the same pollution source. However, accumulation of Cr was unique with its geometric mean being close to that in the control soil. This indicates that Cr content was mainly influenced by soil factors. The Kriging method was applied to estimate the unobserved points. The Kriging interpolation maps reflected significant spatial distribution of these elements as influenced by both pollution and geological factors. The present study indicated that GIS based geostatistics method could accurately analyze the spatial variation of heavy metals and metalloid in the mining area. Overall, higher concentrations of heavy metals and metalloid were found in the center of both the north and south sides. The content of copper in the south was significantly higher than that in the north due to paddy field land uses. In addition, the terrain of four terraces tilted to the center and the broad irrigation accident occurred in the 4th trench in the south of sampling area were also contributed to the higher concentrations of these elements.展开更多
以贵州省盘县为主要研究区域,对Land Sat TM影像进行人机交互目视解译以及运用GIS的空间分析模块和空间统计模块,结果显示:(1)2007—2017年间研究区建设用地面积迅速扩大,耕地面积持续下降,灌丛面积有所增加,有林地和水域面积也有所下降...以贵州省盘县为主要研究区域,对Land Sat TM影像进行人机交互目视解译以及运用GIS的空间分析模块和空间统计模块,结果显示:(1)2007—2017年间研究区建设用地面积迅速扩大,耕地面积持续下降,灌丛面积有所增加,有林地和水域面积也有所下降;(2)土地利用类型的变化主要是耕地与建设用地和灌木林等生态用地之间的相互转移;(3)2007—2017年间,研究区土地利用变化强度很大,其中以建设用地和水域之间的利用动态度增幅最为明显,此外,研究区2007—2017年间的土地利用程度指数呈显著增长;(4)在喀斯特山区,坡度、高程对研究区土地利用格局的形成及演变有重要作用;(5)盘县矿区土地利用变化的主要驱动因子是人口增长和经济发展,同时还受到政府政策、城市规划以及人们环保意识提高的影响。总体上看,经济的大发展是矿区土地利用变化的主导因素。展开更多
文摘The spatial distribution characteristics of six heavy metals and metalloid in soil of Zhuji Lipu copper mining area, Zhejiang Province, was studied by using geostatistics approaches combined with GIS. These elements included Pb, As, Cr, Cu, Zn and Ni. The statistical analyses showed that concentrations of these elements were lognormal distribution. Concentrations of Pb, As, Cu, Zn and Ni were strongly correlated with each other indicating that these elements in soils may be from the same pollution source. However, accumulation of Cr was unique with its geometric mean being close to that in the control soil. This indicates that Cr content was mainly influenced by soil factors. The Kriging method was applied to estimate the unobserved points. The Kriging interpolation maps reflected significant spatial distribution of these elements as influenced by both pollution and geological factors. The present study indicated that GIS based geostatistics method could accurately analyze the spatial variation of heavy metals and metalloid in the mining area. Overall, higher concentrations of heavy metals and metalloid were found in the center of both the north and south sides. The content of copper in the south was significantly higher than that in the north due to paddy field land uses. In addition, the terrain of four terraces tilted to the center and the broad irrigation accident occurred in the 4th trench in the south of sampling area were also contributed to the higher concentrations of these elements.
文摘以贵州省盘县为主要研究区域,对Land Sat TM影像进行人机交互目视解译以及运用GIS的空间分析模块和空间统计模块,结果显示:(1)2007—2017年间研究区建设用地面积迅速扩大,耕地面积持续下降,灌丛面积有所增加,有林地和水域面积也有所下降;(2)土地利用类型的变化主要是耕地与建设用地和灌木林等生态用地之间的相互转移;(3)2007—2017年间,研究区土地利用变化强度很大,其中以建设用地和水域之间的利用动态度增幅最为明显,此外,研究区2007—2017年间的土地利用程度指数呈显著增长;(4)在喀斯特山区,坡度、高程对研究区土地利用格局的形成及演变有重要作用;(5)盘县矿区土地利用变化的主要驱动因子是人口增长和经济发展,同时还受到政府政策、城市规划以及人们环保意识提高的影响。总体上看,经济的大发展是矿区土地利用变化的主导因素。
