文献类型：会议论文

英文题名：Experiment and interpretation of geomorphological detection by multi-beam sonar in Huguang-yan Maar Lake

作者：Zhang, Peizhen[1];Wang, Bin[2];Fan, Jun[2]

机构：[1]Guangdong Ocean Univ, Coll Elect & Informat Engn, Ocean Acoust Lab, Zhanjiang 524088, Peoples R China;[2]Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Shanghai 200240, Peoples R China

会议论文集：2nd Franco-Chinese Acoustic Conference (FCAC)

会议日期：OCT 29-31, 2018

会议地点：Le Mans Univ, Le Mans, FRANCE

主办单位：Le Mans Univ

语种：英文

外文关键词：Sonar - Extraction - Textures - Earth (planet) - Volcanoes - Feature extraction - Sediments - Fractal dimension - Underwater acoustics

外文摘要：The Huguangyan Maar Lake is caused by a volcanic eruption. The original sediments at the bottom of the lake are natural yearbooks for the evolution of the earth's climate and environment. A multi beam sonar technique is used to scan the full coverage on the lake surface to get fine samples of echoes form the lake bottom. The information of the bathymetric data of the lake bottom is accurately described and the results of three-dimensional geomorphology imaging are given. The results show that the lake is divided into two parts, east and west, by a north-south underwater volcanic wall, and the maximum depth of water is over 22 meters. We apply a texture feature extraction method based on multi-scale fractal dimension to describe the characteristics of the sediments and roughness. Multi-scale fractal dimensions algorithm is used to extract waveform characteristics of depth samples in different directions. General distribution of sediment at the bottom of the lake is distinguished by the width of multi-scale fractal spectrum. The results obtained can be helpful for the estimation of the physical properties of sediments.