Noise pollution analysis supported with three dimensional GIS

Pao Yue-kong Library Electronic Theses Database

Noise pollution analysis supported with three dimensional GIS

 

Author: Yan, Ruqi
Title: Noise pollution analysis supported with three dimensional GIS
Degree: M.Sc.
Year: 2014
Subject: Noise pollution
Geographic information systems
Hong Kong Polytechnic University -- Dissertations
Department: Faculty of Construction and Environment
Pages: x, 121 pages : illustrations (some color) ; 30 cm
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b2759133
URI: http://theses.lib.polyu.edu.hk/handle/200/7581
Abstract: With the higher demands of life, people focus more on living environment than any time before, especially human living in urban. However, the growing problems of noise pollutions affect the living condition. Hong Kong, as one of the megacities in the world, also faces the severe noise pollutions. Therefore, the consciousness of public that concerned noise pollutions is clearer than before. Nonetheless, on the account of lack of professional knowledge, public cannot understand how seriously the noise pollutions are, and as things stand, noise pollution representation methods still has a lot of research can be done. This study aims at using a three-dimensional geographic information system to represent noise levels on a building in two facades in the vertical direction. Then compare the measured values with the theoretic values calculated by a sound propagation model and analyze the differences. In the meantime, represent the measured values on a three-dimensional model corresponding to the building and analysis the pattern occurs on the building. In order to show the traffic network of the study area and help the analysis, the study built up a simulation model of the surrounding roads as well. Through making the comparisons with measured data and theoretic data of the noise level, the pattern of measured data is not like the theoretic pattern that noise levels decrease with the elevation increased, but has a peak value in a specific floor. In addition, the study gives the reasons of this situation. Meanwhile, use three-dimensional virtual and hypsometric tints obtain in ArcGIS to represent the noise levels.

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