用ADCP进行走航式悬沙浓度测量的初步研究   总被引：32，自引：5，他引：27  

汪亚平  高抒  李坤业 《海洋与湖沼》1999,30(6):758-763

用ＤＲ３００型宽幅ＡＤＣＰ在胶洲湾口站进行了走航工断面观测。观测期间悬沙浓度小于４０ｍｇ／Ｌ,悬沙粒度分布曲线具有双峰特征,调查船航速为２￣３ｍ／ｓ。用水样过滤法率定相应的ＡＤＣＰ声学信号,获得池计算悬沙浓度的半经验公式及悬沙浓度剖面分布数据,分析结果即使在悬沙浓度较低,悬沙分选性较差,船速较高等不利于ＡＤＣＰ观测的现场条件下,测量误差与光透式浊度计的误差相当。因此,在走航状态和低悬沙浓度条件下  相似文献   

ADCP对悬浮沉积物浓度的测量及其误差分析研究   总被引：6，自引：0，他引：6  

兰志刚  龚德俊  李思忍  徐永平  秦枫  姜静波 《海洋科学》2004,28(10):20-23

为实时、连续地测量海水中悬浮沉积物,利用声学多普勒海流剖面仪(ADCP),可以在测流的同时,测量海洋悬浮沉积物浓度。描述了利用后散射强度,估计悬浮沉积物浓度的原理。在现场测试中,利用采水器采集水样,通过水样分析并结合声信号的衰减特征对AI)CP的测量结果进行修正。作者还结合现场测试结果,对这一测量方法的精度进行了分析。现场实验表明,经公式校正后,ADCP测得的后散射强度与实测水样所获得的悬浮沉积物浓度之间有很好的相关性,相关系数达0．88,由此证明,此测量方法具有很好的实用价值和应用前景。  相似文献   

现场粒径分析仪与ADCP同步测量悬浮沉积物浓度的粒径修正方法   总被引：10，自引：2，他引：8  

兰志刚  龚德俊  于新生  李思忍  徐永平 《海洋与湖沼》2004,35(5):385-392

利用后散射强度(ABS)估计悬浮沉积物浓度原理,根据Rayleigh散射理论,给出了利用现场粒径分析仪与声学多普勒流速剖面仪(ADCP)同步测量悬浮沉积物浓度的粒径修正方法,并推导出了一种新的、用于对ABS进行粒径修正的等效粒径计算公式(9)。利用这一公式并结合LISST-100所测的粒径分布信息,可以对ADCP所测的ABS进行粒径修正,其修正方法见式(10)。结合利物浦湾和Anglesey周边海域的现场采样、测量及其分析结果,对上述粒径修正方法进行了验证。分析结果表明,采用上述公式进行粒径修正后,ADCP测量悬浮沉积物浓度的精度有较大程度的提高,线性拟合的相关系数从0．65-0．71提高到0．78-0．88。  相似文献   

利用ADCP和LISST-100仪观测悬浮物浓度的研究   总被引：3，自引：0，他引：3  

原野  赵亮  魏皓  江文胜 《海洋学报》2008,30(3):48-55

利用黄河口海床基声学多普勒流速剖面仪(ADCP)的周日观测资料对悬浮物浓度进行了反演,反演过程中综合考虑了球面扩散、声学近场的非球面扩散、海水和悬浮颗粒的吸收衰减以及其他因素对回声信号的影响,结果表明在粒径保持相对稳定的情况下,利用ADCP仪回声强度反演悬浮物浓度具有较高的精度.结合现场激光粒度仪(LISST-100)测得的粒径分布信息在反演过程中考虑了粒径修正,重点讨论了观测区域粒径变化对结果的影响,结果表明粒径的剧烈变化会降低体积后向散射强度与悬浮物浓度之间的相关性.大颗粒物质的存在使计算得到的悬浮物浓度偏高,粒径修正虽然在一定程度上消除了这种影响,但线性拟合的相关性并未提高.  相似文献   

基于ADCP湾口测流的纳潮量计算   总被引：5，自引：0，他引：5  

乔贯宇  华锋  范斌  熊学军 《海洋科学进展》2008,26(3)

通过ADCP(声学多普勒海流剖面仪)在胶州湾湾口走航观测,得到胶州湾口团岛到薛家岛断面在春季和秋季的大潮、小潮的海流资料,对观测的流量值进行时间积分,从而得到胶州湾的纳潮量.计算得到胶州湾纳潮量为10.117×108 m3,同以往其他算法的结果相差在10%以内.  相似文献   

ADCP流量生成模型及相应计算方法研究          下载免费PDF全文

韩继伟  符伟杰  唐跃平  邵军 《水文》2014,34(6):9-13

如何快速准确监测河道流量,一直是水文学者研究的对象。ADCP是一种先进的流量测验仪器。本文分析ADCP流量测验机理,提出ADCP流量生成模型的概念,分析出ADCP流量生成模型的结构,构建了ADCP流量生成模型。根据流量生成模型研制的ADCP流量计算程序计算结果和目前应用广泛的Winriver软件计算结果极其相似。ADCP流量生成模型概念准确、结构合理,数据处理计算方法得当、研制的程序可靠。这为ADCP国产化奠定了坚实的基础。  相似文献   

基于ADCP反向散射强度估算悬沙浓度在洋山港的应用研究     

张志林  邓乾焕  朱巧云  钱峰 《水文》2011,31(2):62-68

洋山深水港地形差异大,流态复杂,在宽阔的西口门和窄深东口门,以传统方法同步开展悬沙输移监测十分困难。详述了在颗珠山汊道应用ADCP走航测沙的实现方法,结论显示,与传统代表垂线法成果相比,通过ADCP声反向散射信号计算的垂线平均含沙量,其对比标准差约为6%,随机不确定度在12%(置信水平为95%)左右,误差分布基本成正态,两种方法之间的断面输沙率相关系数达到0.96,可见,利用ADCP的声反向散射信号,只要标定得当,在洋山港区得到的垂线平均含沙量和断面输沙率是可信的,该技术将为洋山港区关键控制断面悬沙监测提供新思路。  相似文献   

The current dynamics inside the Strait of Bonifacio: Impact of the wind effect in a little coastal strait     

O. Gerigny  B. Di MartinoJ.C. Romano 《Continental Shelf Research》2011,31(1):1-8

The dynamics of Bonifacio strait (south of Corsica) are investigated in a comprehensive study at long term from two set of data. First, by moored ADCP put in middle of the strait during six weeks (4 November 2004 to 7 January 2005), at a depth of 40 m and at few Kilometers from coast. Second, by velocity profiles obtained with a 314.4 kHz Acoustic Doppler Current Profiler (ADCP) during seven cruises (Cyrce) covering entirety strait. From moored ADCP data, a study is made on time correlation between wind stress and current. Shipboard ADCP data permits to obtain a general view in totality of strait and mostly to observe spatial variability. This study shows that the circulation is governed both by wind stress and by general circulation of Mediterranean Sea.  相似文献   

沙埕港湾口断面潮流及余流特征分析     

万凯  鲍献文  姚志刚  万修全  夏颖颖 《海洋与湖沼》2014,45(4):669-675

基于对沙埕港湾口断面的连续走航观测资料, 成功构建了沿走航断面的10 个站点的连续海流序列, 并分析了潮流、余流、潮通量等水文要素。分析结果表明, 沙埕港湾口水道潮流类型为正规半日潮流, 涨潮最先出现在中下层而落潮最先出现在上层, 涨(落)潮转流相差约为30min。水道内潮流为往复流, M₂ 和S₂ 分潮流流速较大, 倾角基本沿水道主轴方向。沙埕港湾口断面余流呈2 层结构, 10m 以浅基本为东南向余流流出湾口, 核心位于湾口断面南侧。10m 以深多为西北向流入湾内,入流核心位于湾口断面中部的底层区域。对潮通量的计算表明, 通过湾口进入沙埕港的潮通量约为1.63×10⁸m³。  相似文献   

Lateral variability of flow over a sill in a channel of southern Chile     

Mario Cáceres  Arnoldo Valle-Levinson  Carlos Molinet  Manuel Castillo  Monica Bello  Carlos Moreno 《Ocean Dynamics》2006,56(3-4):352-359

Measurements of velocity and density profiles were used to describe the tidal and mean flow structure across and along a sill in Refugio Channel, a fjord-like inlet in Southern Chile (43.9°S). These are the first oceanographic measurements of any kind effected in Refugio Channel. Current profiles were obtained with a 307.2-kHz acoustic Doppler current profiler during two semidiurnal cycles along a repeated triangular circuit. Two along-channel transects formed the sides of the triangle that crossed the sill and were identified as the western and eastern transects. One cross-channel transect, the base of the triangle, was located on the seaward side of the sill. Density profiles were obtained at the corners of the triangle. The longitudinal mean flow in the western transect showed a two-layer exchange structure over the landward side of the sill. The structure of net seaward flow at the surface and landward flow at depth was disrupted by the sill in such a way that over the seaward side of the sill, only seaward flow was observed throughout the water column. This likely resulted from the blocking of landward net flow by the sill. In the eastern transect, two-layer exchange dominated over most of the transect and was consistent with the observed density profiles. Over the seaward side of the sill, a surface layer, ∼10m deep, flowed landward as a third layer. This feature should have been caused by river input further seaward (to the north) and produced a surface convergence region over the sill. In terms of tidal flows, the greatest tidal current amplitudes were 40cm s⁻¹ over the sill as the flow accelerated through the reduced cross-sectional area of the channel. Near-surface flow convergences were identified over both along-channel transects.  相似文献