文献类型：期刊文献

中文题名：石油污染水体后向散射系数垂向分布模型研究

英文题名：Vertical distribution model of backscattering coefficients in petroleum-polluted water bodies

作者：邢旭峰[1];黄妙芬[1];刘杨[2];黄颖恩[1];张楠楠[2]

机构：[1]广东海洋大学数学与计算机学院,广东湛江524088;[2]中国石油勘探开发研究院测井与遥感技术研究所,北京100083

年份：2021

期号：5

起止页码：42

中文期刊名：海洋湖沼通报

外文期刊名：Transactions of Oceanology and Limnology

收录：CSTPCD、、CSCD2021_2022、北大核心、CSCD、北大核心2020

基金：国家自然科学基金项目(41771384);2018年省级促进经济发展专项资金(海洋经济发展用途)重点项目(GDME-2018E003);广东海洋大学2017年“创新强校工程”自主创新能力提升项目(GDOU2017052501);广东海洋大学科研启动经费资助项目(E16187)。

语种：中文

中文关键词：石油污染水体;后向散射系数;垂向分布;e指数方程

外文关键词：petroleum-polluted water;backscattering coefficient;vertical distribution model;natural exponential function

中文摘要：后向散射系数是影响水体辐射传输特性的重要因子之一,本文旨在通过研究石油污染水体后向散射系数的垂向分布模型,为进一步进行石油类水体水下光场变化研究奠定基础。利用2018年8月25—27日在辽宁省大连港海域A、B、C 3个站点现场测定的数据,基于悬移质垂向分布理论、后向散射系数分离算法、后向散射系数随悬浮物和石油类浓度变化的关系模型,建立了后向散射系数垂向分布的半经验模型,利用实测数据确定了模型中的参数,并计算了后向散射系数的垂向变化率,最后对模型的有效性展开了讨论。结果表明:(1)后向散射系数随水深的变化遵循e指数与复合e指数之和的关系;(2)A与B两个站点的后向散射系数垂向变化率随深度变化而递增,且A站点递增幅度大于B站点,说明A站点后向散射系数随深度的变化速度比B站点快,C站点后向散射系数垂向变化率几乎不变,说明C站点的后向散射系数随着深度变化接近线性关系,这与现场实测数据是吻合的;(3) 3个站点的半经验模型平均相对误差分别为1.984、0.282和0.349,表明模型在不同站点具有不同的精度,在离岸最近的A站点精度最低,C站点次之,B站点最好。

外文摘要：Using in-situ observational data measured at 3 observation sites(namely site A,B and C)in Dalian Port,Liaoning Province,China on 25—27 August,2018,a semi-empirical model about the vertical variation of backscattering coefficients(VDMoBC in short)is established based on the vertical distribution theory of suspended load and the separation algorithm of backscattering coefficients.The empirical relationships between backscattering coefficient and suspended matter as well as the concentration of petroleum are also used in the derivation of the semi-empirical model.The parameters of the model are determined by the measured data and the vertical changing rate of backscattering coefficient is calculated from the model.The model is finally validated by analyzing the mean relative error and mean absolute error.The results show that:(1)the relationship between backscattering coefficient and water depth is not an elementary function,but a sum of a natural exponential function and a complex natural exponential function.(2)The vertical change rate of backscattering coefficient at sites A and B increases with water depth,and the increment of site A is greater than that of site B,indicating that the backscattering coefficient at site A changes faster with depth than that of site B.The vertical change rate of backscattering coefficient at site C is almost unchanged,indicating that the vertical change of backscattering coefficient at site C is close to a linear relationship to some extent.They are consistent with the field measured data.(3)The mean relative errors of the semi-empirical model for the 3 sites are 1.984,0.282 and 0.349,respectively,which indicates that the model has different accuracy at different locations.For site A,which is the closest to the coast,the accuracy is the lowest,the accuracy for site C is in the middle place,and the accuracy for site B is the best.