Analysis of the influences of physical parameters on sediment sound speed

Hou, Zhengyu; Guo, Changsheng; Wang, Jingqiang; Chen, Wenjing; Li, Tiegang; Zhang, Yanxin; Fu, Yongtao

doi:10.1080/1064119x.2016.1198944

Cited by 5 publications

(1 citation statement)

References 31 publications

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“…the system to study the correlation between velocity and physical properties in the Yellow Sea. Hou et al (2015Hou et al ( , 2016 studied the geoacoustic properties of sediments in the southern South China Sea and found that porosity is the most influential factor in physical properties for the sound velocity.…”

Section: Introductionmentioning

confidence: 99%

Sound Velocity Predictive Model Based on Physical Properties

Hou

Wang

Chen

et al. 2019

Earth and Space Science

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The correlation between sediment sound velocity (V) and physical properties has been studied for 60 years using empirical equations, and it has been found difficult to predict V accurately. Random Forest (RF) is a scientific discipline and a method of data analysis that automates analytical model building. Here we present the implementation of RF algorithm in V prediction and sediment classification. The databases were from previously collected data in the northern South China Sea. The goal of this study is to establish a predictive model based on RF using multiple physical properties (mean grain size, porosity, wet bulk density, and water content). Compared to empirical equations, the average error of RF velocity is only 0.95%, ranging from 0.03 to 2.73%, indicating that the RF algorithm has improved the accuracy of V prediction. We also used mean decrease impurity importance to evaluate the importance of a variable and found that the most important feature in the predictive model is mean grain size. We also used the RF as a potentially useful tool for sediment classification. The classification model has up to 75% accuracy in the dataset. Multiple features, such as physical properties, sedimentary environment, and sediment source, affect the geoacoustic properties of sediments. The next goal is to use multiple features to improve the model and further improve the accuracy of sound velocity prediction and sediment classification.

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Section: Introductionmentioning

confidence: 99%