Application of Noise Mapping on Urban Noise Environment Management:Using Tainan City as a Case Study

• Main Authors: Yen-Hua Chen, 陳妍樺
• Other Authors: Min-Der Li
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/42051573609268119758

碩士 === 中興大學 === 環境工程學系所 === 95 === The goal of this study is to build and analyze the noise maps of Tainan metropolitan, and the accuracies of several noise simulation models are also evaluated. The noise data recorded at 345 monitoring sites including morning, afternoon, and nighttime for both summer and winter periods are summarized and visualized as noise maps via geographic information systems (GIS). The results indicate that the highest noise occurred during daytime, and high noise values were generally observed within the areas along the major traffic roads and residential districts. The noise along the major roads remained high at afternoon; and for night time, higher noise was recorded at the commercial and residential districts. Due to the plentiful ecological activities of Tainan, especially in summer, the noise in summer is generally 5 dB(A) higher than winter. Furthermore, although the lowest noise values were occurred at nighttime, most of them exceed the legal standards, revealing that the noise standards for nighttime are very strict so it’s quite hard to meet the requirements. RLS-90 is the statutory noise simulation model in Taiwan. This study employed Cadna A, a noise simulator containing the RLS-90 module, to simulate the noise of some of the monitoring sites. The deviations between the simulation results and observation data were all less than 3 dB(A). However, the noise estimations calculated by two regression models, Chang model and Shi model, exhibited larger systematic errors. It can be concluded that the noise simulation model achieves more accurate results than regression models. Keywords: Tainan, noise map, geographic information systems, noise simulation model, noise regression model.