摘要
由于不同的水深探测手段及海深反演方法适用于不同深度的海域,且全球海域水深分布不均,因此在探测及反演海深之前,需对目标海域的水深分布有一定认识。本文采用ETOPO1模型对全球及部分海域进行统计分析,结果表明,全球及大西洋、印度洋、太平洋区域的水深大多处于3 000—10 000 m,其中3 000—5 000 m水深海域占比较大,因此,在这些海域主要采用重力数据结合船测数据进行反演,同时应注意避开海岸带、岛屿较多、海脊存在的区域;对于水深小于1 000 m的海域,可以根据外部环境,采用多波束船测、水深遥感、机载激光测深等方式进行探测。通过分析及统计全球和重点海域的水深可以为海深探测及海底地形反演方法的选取提供参考。
Due to the different depth detection means and sea depth inversion methods for different depth of the sea,and the water depth distribution is not uniform in the global sea area,it is necessary to know the water depth distribution in the target sea area before detecting and inverting the sea depth. The ETOPO1 model is used to analyze the global and some sea areas. The results show that most of the water depths in the world,the Atlantic Ocean,the Indian Ocean and the Pacific Ocean are in the range of 3 000-10 000 m,of which 3 000-5 000 m water depth accounts for a large proportion. Therefore,the gravity data and ship-derived data are mainly used in this region to predict the water depth. At the same time,more attention should be taken to avoid areas with many coastal zones,islands and ridges. For sea areas with water depth less than 1 000 m,techniques and methods of multi-beam sonar,remote sensing of water depth,airborne laser bathymetric technique and so on can be adopted according to the external environment. The analysis and statistics of the depth of water in the global and key sea areas can provide reference for the selection of sea depth detection and seabed terrain inversion.
引文
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