공항주변소음도 분포특성에 관한 연구

Abstract

As a result of measuring the influences of noise by airplanes around Gwangju airport using airplane noise forecast model, the following conclusions were obtained. 1. As a result of examining total 36 points of regions with noise measurement and service characteristics for 14 days (6 fixed points, 30 moving points), civil aircraft and war plane were operated with flight patterns of take-off, landing, and others (T&G, turning, and passage). 2. Frequency of flight direction at Gwangju airport runway and use rate of each runway might be different depending on the period of survey, but the frequency of flight service direction during the period of measuring noise was landing of total 570 times. 「South→North」 take-off (04 direction) was 521 times (91.4%),「North→South」take-off (22 direction) 49 times (8.6%) and of 585 times of landing, 「South→North」was 541 times (92.5%), 「North→South」 44 times (7.5%), and use rate by runway directions was evaluated as 04 direction : 22 direction=9 : 1. Take-off and landing of 9 times a day were found at Yeosu airport. 3. The results of measuring the noise on the day of flight service at fixed measuring point of Gwangju airport showed that Sinchang village was 89.2 WECPNL, Sinyachon village 82.3 WECPNL, Songjeong village 83.0 WECPNL, Yurim village 90.2 WECPNL, Yongbo village 80.5 WECPNL, and Jangam village 92.0 WECPNL and these regions exceeded 80 WECPNL of "Na" district value of the third class district of expected noise damage. 4. Noises of Yeosu airport were 74.94 WECPNL at AN-4 point (Sinpung-ri), 72.88 WECPNL at AN-8 point and noise at take-off direction and airport adjacent regions was high.

Low noise was found at AN-10 point (Sumunpo) as 61.51 WECPNL, AN-11 point (Nochon) as 59.92 and it was thought that there was low noise when landing and at the regions distant from airport, and noise at Yeosu airport was below 80 WECPNL which is the standard of expected noise damage area because civil aircraft was flying there. 5. As a result of measuring road traffic noise as the background noise of Gwangsan-gu, road traffic noise level at daytime showed higher noise over 74dB(A) (environmental standard : 55dB(A)) at all regions where traffic volume was over 170 cars, but the road traffic noise level at night was 49.7～77.5dB(A) as traffic volumes of 20～215 cars (environmental standard : 45 dB(A)). It was thought that road traffic noise level was over 70dB(A), exceeding the standard value and under the influence of traffic noise, but traffic noise which is the background noise on the characteristics of flight noise seemed to be neglected. 6. Flight noise evaluation model to interpret the noise space distribution used INM published by Federal Aviation Administration (FAA). As a result of analyzing correlations between results of F-5 take-off and those of INM model to verify the appropriateness of INM model, 'y = 1.0387 × Measured Result (χ)' and correlation coefficient was 0.8008. In addition, as a result of analyzing appropriateness of measured WECPNL and INM WECPNL considering the average take-off frequency and duration for the take-off situation during measured period, y = 1.0028 x Measured Result (x)' and correlation coefficient was 0.9252, and then it was judged that the results of measuring noise by INM model were enough to explain the noise of regions around Gwangju airport at present. This study analyzed auto measurement network data managed by the Ministry of Environment beyond the security of data through scientific field survey and direct measurement, synthesized the results of the studies to enhance the objectivity and reliability of the research results, ensured the data to explain the noise situation at the regions around Gwangju airport, and it was expected that this study will provide the spatial noise distribution using WECPNL which is the evaluation level of flight noise for the flight noise impact of regions around Gwangju airport through INM model and it will be used as basic materials to establish noise reduction measures and various noise reduction methods in future.