珠江口海陆联测-香港区域子台噪声测试及其观测效果分析

Co-survey of Land and Sea at the Pearl River Estuary-Noise Test and Observation Effect Analysis of Substations in Hongkong Region

基于香港地区5个海陆联测子台的噪声分析数据,结合人工地震的观测结果,对该区域噪声水平和传导机制做进一步的研究,并分析了该台阵的地震监测水平。结果表明:香港地区普遍噪声水平偏高,噪声测试结果反映了该区域的噪声污染较为严重,但在城市边缘地带仍可进行地震观测;台阵对于天然地震的监测效果较好,对人工地震(爆破)的监测效果较差。根据噪声水平和波形记录质量,可进一步推断城市噪声污染和海水对爆破等产生的面波的削减作用较为明显。这一实验过程和结果对分析香港地区的环境噪声水平,地震观测结果可信度和介质物性都有借鉴意义。

Based on the co-survey of land and sea at the Pearl River Estuary project,the seismic monitoring level of five mobile sub-stations in Hong Kong area is analyzed by combining the observed results of artificial earthquakes. The results show that the general noise level in Hong Kong is at a high level,and the noise test results reflect that the noise pollution in this area is more serious,however,it is still suitable for seismic observation in the urban fringe. The monitoring effect of the platform array is better for short-range natural earthquakes,but it is worse for artificial earthquakes （blasting）. According to the noise level and the recorded wave quality,it is possible to further deduct that the reduction to surface wave generated by blasting,etc. from the noise pollution of the city and the sea water is more obvious. The experimental process and results can be used for reference in analyzing the environmental noise level,the reliability of seismic observation results and the physical properties of media in Hong Kong.