Field observations of SPM using ADV, ADP, and OBS in a shallow estuarine system with low SPM concentration—Vitória Bay, SE Brazil
Field observations of SPM using ADV, ADP, and OBS in a shallow estuarine system with low SPM concentration—Vitória Bay, SE Brazil
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DOI：
10.1007/s10236-010-0364-5
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发表时间：
2011-03
期刊：
影响因子：
2.3
通讯作者：
Marcel G. Moura;V. S. Quaresma;A. Bastos;Paulo Veronez
中科院分区：
文献类型：
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作者：
Marcel G. Moura;V. S. Quaresma;A. Bastos;Paulo Veronez
本研究调查的直接和间接的方法，使用光学和声学仪器获取所需的信息，以估计悬浮颗粒物（SPM）的浓度在维多利亚湾，浅河口系统在巴西东南部。目的是校准和比较使用不同的仪器（OBS，ADP和ADV）来估计水体中和床附近的SPM浓度。通过将过滤的水样品与光学和声学测量相关联来确定浓度。总体而言，该方法适用于所选的低SPM浓度（<60 mg/L）的浅水河口环境。皮尔逊系数范围从0.75到0.85，相关测量时，在三个采样深度。相关系数值的差异表明，在三个深度（近床，中层水柱，近表面）的校准是更有效的比单独的表面样品，即使在浅水（1.33米深）。当试图校准浓度在整个水柱与样品在一个海拔高度，相关值非常低，从而增加了误差估计悬浮颗粒物浓度。
The present study investigated direct and indirect methods using optical and acoustic instruments for the acquisition of information required to estimate the concentration of suspended particulate matter (SPM) in Vitória Bay, a shallow estuarine system in SE Brazil. The aim was to calibrate and compare the use of different instruments (OBS, ADP, and ADV) to estimate SPM concentration in the water column and near the bed. Concentration was determined by correlating filtered water samples with the optical and acoustic measurements. In general, the methodology proved tenable for the chosen shallow estuarine environment with low SPM concentration (<60 mg/L). Pearson’s coefficient ranged from 0.75 to 0.85, when correlating measurements taken at three sampled depths. Differences in the correlation coefficient values showed that calibration at three depths (near the bed, mid-water column, and near the surface) was more effective than for surface samples alone, even in shallow (∼3 m deep) water. When calibration was attempted for concentration in the entire water column with samples at just one elevation, the correlation value was very low, thus increasing the error in estimating the SPM concentration.