%0 Journal Article
%T 悬沙质量浓度对盐度测量的影响及修正
%A 焦建格
%A 黄森军
%A 郑浩磊
%A 孙志林
%J 浙江大学学报(工学版)
%D 2018
%R 10.3785/j.issn.1008-973X.2018.09.003
%X 为提高盐度测量的准确度，将长江口沙样与盐水混合均匀，配制成初始盐度在2~30 g/kg、悬沙质量浓度在0~70 g/L的浊盐水，用CTD48M测量其盐度，从而探讨悬沙质量浓度对盐度测量的影响并提出该影响的修正方法.通过分析试验数据得出，同一初始盐度下，测量盐度随着悬沙质量浓度的增大而减小，且两者之间有明显的负线性关系.通过分析悬沙质量浓度、测量盐度与初始盐度之间的关系，采用两次线性拟合与平面拟合分别建立悬沙对盐度测量影响的无量纲修正经验公式，该公式简练、精确度高，可供现场测量参考使用.</br>Abstract: The influence of suspended sediment concentration on salinity measurements was investigated and the corresponding correction method by laboratory experiment was proposed, to improve the accuracy of salinity measurement. The sand samples of the Yangtze Estuary and saltwater were mixed evenly, and the turbidity saltwater with the initial salinity of 2~30 g/kg and the suspended sediment concentration of 0~70 g/L were prepared. The salinity was measured by CTD48M during the experiment. The analysis results of the experimental data indicate that the measured salinity decreases with the increase of suspended sediment concentration under the same initial salinity. In addition, suspended sediment concentration has a good negative linear relationship with the measured salinity. According to the relationship among suspended sediment concentration, measured salinity and initial salinity, the non-dimensional empirical formulas are given by double linear fitting and plane fitting, respectively, to correct the effect of suspended sediment on salinity measurement. The formulas are of concise and accuracy, which can supply references and applications to field measurement.
%U http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2018.09.003