基于多维传播模型研究城市地质环境的演变模式

Research on Urban Geological Environment Evolution Mode Based on Multidimensional Dissemination Model

通过分析重金属污染物在土壤中传播特征,建立了二维传播模型,然后对空间分布中的局部最高点以及周围的采样点进行多项式拟合,确定二维传播系数.根据已知采样点信息以及空间分布图,找到局部最大的点即为污染源的位置.在此基础上,为更好地研究城市地质环境的演变模式,建立了基于时间的三维传播模型,以各污染物浓度分布为判断指标,用计算机来模拟前后5年重金属污染物浓度的演变情况,得到该城市地理环境呈逐渐恶化趋势.

By analyzing the heavy metal pollutant＇s characteristics of dissemination in the soil, a two-dimensional dissemination model is established. To determine the two-dimensional propagation coefficient, the polynomial fitting is carried out for the local maximum point and sampling points around it. In terms of the information of the sampled points and their spatial distribution, it is found that the location of the local maximum point is the source of pollution. Based on this observation, in order to study the evolution of urban geological environment model in a better way, a three-dimensional propagation model based on time is established and taking various pollutant density distributions as judgment target, with the computer simulation of the evolution of heavy metal pollutant concentrations of the former and the latter five years, it is found that the geological environment of the city trends toward gradually deteriorating.