An Sample Analysis of Heavy Metal Pollution to Urban Surface Soil Based on Transfer Function Theory

Abstract:

The degree of heavy-metal pollution of different district in city area is discussed by improved Nemerow model and further topographic maps are drawn .From the improved Nemerow model, the Nemerow integrated pollution index is determined . The main reason of pollution is found according to weight, then the corresponding heavy-metal pollution things portion in the overall district is computed by using the model . The element that corresponds the maximum weight is found .And it proves that the heavy-metal pollution element Hg is the main pollution reason .The pollution source is determined by heavy metal spreading features using transfer function theory. Thinking of the main pollution elements as the researched object ,the spreading features are analized using transfer function characteristics. And the spreading process is described using flow chart.

• Periodical: Applied Mechanics and Materials (Volumes 446-447)
• Pages: 1516-1522
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.446-447.1516
• Online since: November 2013
• Authors: Yang Shu, Hu Shu
• Keywords: Feedback Net, Inverse Transform, Laplace Forward, Pollution Index, Transfer Function

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