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| 城市表层土壤重金属污染分析优化模型 |
| Optimization Model for Analysis of Heavy Metals Contamination in Urban Topsoil |
| 投稿时间：2017-01-03 修订日期：2017-01-18 |
| DOI： |
| 中文关键词: 城市表层土壤 重金属污染 克里格插值法 内梅罗综合指数法 |
| 英文关键词: Urban topsoil Heavy metals pollution Kriging Interpolation Method Nemerow index method |
| 基金项目:国家自然科学(61300082)突变目标的视觉跟踪算法研究；辽宁省教育厅科学研究一般项目(L2014573)基于灰色理论的重大事件影响力定量评估模型的研究与应用 |
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| 中文摘要: |
| 为了分析城市表层土壤重金属污染问题,本文针对大量空间距离数据和重金属元素含量数据,应用克里格插值法,绘制了重金属元素的空间分布图并建立了空间分布模型。同时,本文建立评价重金属污染程度模型,用单项污染指数和内梅罗综合指数法的综合污染指数评价了五类地区的污染程度,并找到重金属污染的主要原因。最后,本文也分析了重金属污染物的传播特征,查知重金属的污染与污染物在土壤中的迁移、污染物在土壤中的扩散,以及土壤中固体骨架对污染物吸附的主要因素,由此建立了重金属污染物在土壤中的对流一弥散一吸附方程模型。 |
| 英文摘要: |
| This paper drew the spatial distribution map of the heavy metal and established the spatial distribution model by using mass of data of spatial distance and heavy metal element content and by using Kriging Interpolation Method. The purpose is to analyze the heavy metal pollution of the urban topsoil. Moreover, the paper established the evaluation model of the heavy metal pollution degree, and evaluated the pollution degree of different regions of five categories, by using individual pollution index and Nemerow index method, and found out the crucial causes for the heavy metal pollution. Lastly, the paper analyzed the propagation characteristics of the heavy metal pollutants, and defined them as the main factors as in-soil migration, in-soil diffusion and adsorption of solid matrix, and accordingly established the equation model of the convection, that is, one diffusion and one adsorption interact. |
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