THE WATER COLUMN ACOUSTICAL DETECTION OF METHANE PLUME AND GAS MIGRATION FLUX CALCULATION
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摘要: 探测海底天气渗漏活动形成的甲烷羽状流,研究其基本特征和分布,具有重要的资源和环境效益。目前对于海底甲烷羽状流的声学探测主要以船载单波束和分裂波束声呐系统为主,而多波束声呐系统的声学图像分辨率较高,覆盖宽度较大,具有良好的应用前景。对于单个或少量甲烷羽状流气体运移通量的测算,多采用声学原位观测,即通过ROV携带声呐探头或在海底固定安装特定声呐系统的方式实现。对于某一海域海底天然气渗漏总量的测算,多采用走航式声学遥感观测,其核心是建立由甲烷羽状流体积反向散射强度反演其气体运移通量的模型。Abstract: The detection and study of the methane bubble plume is of great significance to the resource and environment research. Nowdays the detection of undersea methane plumes is mainly based on shipboard single-beam and split -beam sonar system. However, the resolution of acoustic images from the multi-beam sonar system are higher, and the covering width larger, so the system should have a good application prospect in the detection of submarine methane plume. The acoustic in-situ observation method that practiced by sonar carried ROV or fixed on the sea floor is generally used to calculate gas migration flux for single methane plume. The acoustic remote sensing observation method is usually used to calculate gas migration flux for a certain region, and the emphasis of this method is to build inversion model to calculate gas migration flux by scattering signal.
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