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本文在获取研究区多波束水深和反向散射强度数据的基础上,应用CARIS、Global Mapper等后处理软件对数据进行分析和处理,获得高精度的海底地形地貌,对研究区出现的沙波地貌进行研究,并探讨其动力学成因;利用量化的底质反向散射强度图像对研究区的底质类型进行识别和分类,主要得出以下结论:研究区沙波主要为大型沙波;从沙波形态分析,流水波浪主要为NE-SW及NW-SE向;研究区底质反向散射强度值区间为-15~-30d B,由粒度从大到小的顺序可将研究区底质分为砂、粉砂和泥质三种。对比采集的站位样品资料发现,通过多波束反向散射强度来对底质进行分类的准确性是非常高的。高精度的多波束数据对海底沉积地貌和底质类型的识别有着重要的作用。
Based on the data of multi-beam water depth and backscattering intensity in the study area, the paper analyzes and processes the data using CARIS, Global Mapper and other post-processing software to obtain high-precision submarine topography. The main conclusions are drawn as follows: The main sand waves in the study area are mainly large-scale sand waves; from the sand Wave morphological analysis showed that the wave of the flowing water was mainly NE-SW and NW-SE. The backscattering intensity of sediment in the study area ranged from -15 to -30dB. From the descending order of particle size, Sand, silt and clay three. Contrasting the acquired station sample data, it is found that the accuracy of the classification of the substrate by the intensity of the multi-beam backscatter is very high. High-precision multi-beam data plays an important role in recognizing the sedimentary topography and sediment types of seafloor.