基于条件高斯模拟的城市灰尘Pb元素的空间分布特征

城市灰尘是分散于城市不同区域的表面固体颗粒物。城市灰尘对城市环境造成的污染越来越多地受到人们的关注,尤其是城市灰尘重金属对城市生存环境造成的危害。本文利用R软件中的Gstat包,对金华市城市地表灰尘中的Pb元素含量进行500次条件高斯模拟,并从中随机抽出3次模拟对其模拟结果进行分析,从模拟结果可以看出研究区Pb元素总体上显示出相似的空间变化趋势,但在细部空间变化上是有差别的。条件高斯模拟法对未知点的模拟值具有不确定性,克服了普通克里格法的平滑效应,能够更好地反映研究区的随机性和结构性。

Spatial Distribution Characteristics of Urban Dust Pb Element Based on Conditional Gaussian Simulation

Urban dust,which is of surface solid particles scattering in different districts of urban（location and functional districts）.More and more people concerned about the urban environment pollution caused by the Urban dust,Especially the harm of urban living environment caused by the urban dust of heavy metals.This pape main using the Gstsat package of R software to 500 conditional Gaussian simulation the Jinhua City of the PB element,and stochastically extracts three simulations to carry on the analysis to its simulation results,from the simulation results can be seen the Pb element in the study area showed the same trend of spatial variation,but in detail the spatial variation is discriminating,the simulated value was uncertain for the unobserved point,to overcome the smoothing effect of ordinary kriging method,can be better reflect the randomness and structural of the study area.