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为了精确测量原地细粒或粘性悬浮沉积物的质量浓度,曾采用很多方法.在衰减和背散射两方面,光电浊度计常用干测量0—20g/l范围的质量浓度.但由于粒间遮蔽和凝聚作用的出现,在该范围之上,测量结果很不准确.为了检测较稠密的悬浮液,还曾用过该密度计.在 1000—2000g/l范围内精度为± 2%.因此,除非悬液中固体浓度较高,否则,体积密度测量的不准确性就会导致悬液中细粒沉积物浓度的估算误差.如果要精确计算平均浓度低于200g/l的密度,核密度计系统的密度分辨率是不够的.声背散射的应用只在细砂中作过研究.因此,当前在精确测量浓度为20—200g/l间的悬浮细粒沉积物方面存在着仪器空白.要用光学浊度计和核密度计填补它是困难的.
In order to accurately measure the concentration of in-situ fines or viscous suspended sediments, many methods have been used, and in terms of attenuation and backscattering, photoelectric turbidimeters are commonly used to measure the mass concentration in the range of 0 to 20 g / l, The appearance of occlusion and coalescence, above which the measurement is inaccurate, has also been used for the detection of denser suspensions, with an accuracy of ± 2% over the 1000-2000 g / l range. , Unless the concentration of the solid in the suspension is high, inaccuracies in bulk density measurements can result in errors in estimation of the concentration of fine-grained sediment in the suspension.If the average density is to be calculated with an average concentration below 200 g / l, the nuclear density The density resolution of the system is inadequate, and the application of acoustic backscatter is only studied in fine sand, so there is currently a gap in the accuracy of measuring suspended particulate deposits at concentrations between 20 and 200 g / l. It is difficult to fill it with an optical turbidity meter and a nuclear densitometer.