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针对平台和试验条件对声学多普勒流速剖面测量仪(Acoustic Doppler Current Profiler,ADCP)海上比测试验的影响,本文开展了基于坐底平台和浮平台的ADCP海上比测试验。本文统计了不同测量时间段、不同剖面深度比测ADCP所测流速、流向数据的相关系数和均方根误差,完成了基于坐底平台、浮平台开展ADCP海上比测试验总体效果分析,并研究分析了采样时间、海况等试验条件对浮平台试验结果的影响。研究结果表明:浮平台相较于坐底平台更适合开展ADCP海上比测试验,采样时间段不同、海况等级不同都会影响海上比测试验结果。本文研究成果可为进一步优化海上比测试验结果提供方向,为规范国产ADCP的检验验证手段提供理论基础和实践依据。 相似文献
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声学多普勒流速剖面仪(Acoustic Doppler Current Profilers,ADCP),是美国RD公司八十年代初研发生产,用于海洋海流调查的仪器,ADCP能同时采集流速、流向、水深、回波强度、航速等要素,在海洋调查中得到广泛应用。长江水利委员会水文局长江口水文实验站在1990年率先引进了美国RDI公司的窄带DR-600k ADCP,解决了长江口江面宽、风浪大、传统测验方式难以收集完整全潮潮流资料的难题。经过RD公司专家来现场安装、调试、培训等过程,历经两年在长江口徐六泾站及长江中游九江站、大通站进行专项比测试验,掌握了ADCP的操作方法,熟悉参数设置及优化,开发了ADCP数据处理软件,成功应用于长江口潮流测验。20纪90年代至今国产ADCP研制从诞生到产品不断出现,可以借鉴首台引进ADCP的成功经验。本文应与流速仪进行比测(比对),收集不同水文环境的资料样本进行分析研究,资料分析时宜与TRDI的WinRIver软件采集的船速、流速、水深等数据进行对比分析,优化国产ADCP软件的功能,提高国产ADCP软硬件的性能使用单位购买ADCP后应进行必要的外围设备配置如GNSS、外接罗经等,制定严格的操作规程、建立ADCP维护保养制度,以保证ADCP能正常收集资料。生产厂家要建立野外服务公告,对用户在使用过程中遇到的问题及处理方式方法进行公布,同时收集和分享用户的使用经验。 相似文献
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ADCP是目前最主要的流速测量手段之一,自研发成功以后就在国内外得到了广泛的应用本文介绍了ADCP的基本原理、主要类别和国际上ADCP的发展历程,并着重介绍了近年来我国在ADCP领域的研究进展情况,以及国产ADCP在海洋观测和水文测验等领域的应用情况随着我国科研水平的提升和国产ADCP的广泛应用,我国将会在ADCP领域取得更加显著的进步。 相似文献
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根据ADCP检测的需要,研究了宽带ADCP的测量原理及其复相关算法.基于ADCP测量的特点和编码脉冲的特点,对宽带ADCP的复相关算法进行了仿真.文中采用的复相关算法简单方便,仅仅需要加法和乘法,大大简化了运算.仿真结果表明该算法可以应用于ADCP多普勒频率测量中. 相似文献
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研制和生产世界第一流的声学多普勒剖面仪(ADCP)的美国RD仪器公司在1991年6月出版的“信息通报”中介绍了ADCP在深海研究中的开创性应用。迈阿密大学海洋气象学院(RSMAS,University of Miami)的D.Fratantoni和B.Johns最近在拖曳式海洋边界层踪合探测系统(BLIP)上安装了一台自容式ADCP(SS-ADCP),并使用这套ADCP/CTD深拖系统研究大西洋深层海水向加勒比海的溢流现象。利用装在BLIP系统上的ADCP解决了在3000m水深海域方圆数十千米周围内测绘海 相似文献
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营口市位于辽宁省的中南部,面对渤海的辽东湾,背依鞍山市平原丘陵,东邻辽东崇山峻岭,西接盘锦市沿海平原,有辽河蜿蜒人海,海岸线绵延曲折。由于受海洋、河流的影响.营口市四季分明,气候宜人,蕴藏着丰富的滨海旅游资源,海蚀景观、地质珍迹、人文景观等资源各显异彩;尤其是海水浴场,条件极为优越,与国际上一流的海水浴场相比.毫不逊色,在某些特征上还稍胜一筹。 相似文献
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A. P. Tolstosheev 《Physical Oceanography》2009,19(6):358-365
A method for the estimation of the results of reconstruction of the trajectories of drifting buoys is proposed. It is based
on the comparison of the estimates of power spectral densities for the components of current velocity computed according to
three data sets: the data set of the coordinates of a drifting buoy with a built-in GPS receiver, the data set of coordinates formed on the basis of the first set but with data missing and observational errors
corresponding to the actual trajectory measurements by the Argos satellite location and data collection system by the Doppler method, and the data set of coordinates obtained as a result
of interpolation of the second set. As an example, we consider the procedure of realization of the proposed method and demonstrate
the efficiency of its application for the improvement of the reliability of reconstruction of the trajectories of drifting
buoys. 相似文献
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An attempt has been made to estimate the fishery potentials of the EEZ of India on the basis of data on primary and secondary production. The total column primary production and zooplankton production have been calculated to be 265·9 and 9 million tonnes of carbon per year, respectively. From these values the fishery potential has been estimated as 2·5 million tonnes per year. To this, if we add the estimated demersal fish catch, being 1·2 million tonnes per year, the total potential yield comes to 3·7 million tonnes per year. Since the present average total catch is about 1·6 million tonnes in a year, the fish catch could be doubled. 相似文献
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1992年,联合国21世纪议程提出了综合管理的概念,并认为它是海岸管理的最重要目标,而海岸管理的目的就是改进业已存在的管理实践的效率和效果。在21世纪议程的实施过程中,沿海国家面临着巨大的困难,即:为了使综合管理在实践中具有可操作性而建立适合的政府机构。韩国正是在国家范围和次一级区域进行这项工作的实验场所。这项工作的最重要成就是在1996年成立了具有综合协调各涉海部门职能的韩国海洋事务与渔业部(MOMAF)。这篇文章的内容主要来自于这些观察,即韩国政府为建立海岸带综合机制而进行了各种努力,特别是1992年联合国环发大会召开后到1997年初海洋事务与渔业部成立了海岸带管理处这段时间里开展的各种工作,文章重点在于评价在建立海岸带综合机制的过程中综合的概念是如何被应用并被挑战的。文章提出了在东亚地区沿海国家开展合作的可能区域的建议。 相似文献
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天然气水合物地球化学特征 总被引:4,自引:0,他引:4
天然气水合物是在低温、高压以及有足够气体供应条件下形成的一种天然气(主要为甲烷)与水组成的似冰状固态化合物。天然气水合物中包含的甲烷碳是全球甲烷资源的重要组成部分,是一种数量巨大的潜在能源[1]。而且由于甲烷的温室效应,天然气水合物分解释放的甲烷进入大气中会严重 相似文献
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I. E. Timchenko A. A. Primalenny V. D. Yarin E. F. Vasechkina E. M. Igumnova 《Physical Oceanography》2001,11(4):367-378
We use many-year archival observations of hydrologic and hydrobiologic state of the Sea of Azov for the identification of
the structure of a model of its ecosystem. The ecosystem model, supplemented with expert estimates of bioresource consumption
(fish reserve), contamination level, and possible ecologic fines for violation of the sea natural state, is formalized by
the method of system dynamics. Hereat, the major part of influence functions is found in terms of observational data with
application of self-organization algorithms. We also present the results of simulated experiments with the model of the ecosystem,
which enable us to analyse scenarios of its behaviour under the influence of various external factors (wind, river discharge,
water exchange with the Black Sea, etc.).
Translated by Peter V. Malyshev and Dmitry V. Malyshev 相似文献
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Values of root mean square slope 0 and its variations -0 are estimated using the brightness field of an image of the surface of the sea near a speck of light. When 0 and -0 are defined it is highly important to take into account direct as well as dissipated solar radiation.The space-time analysis of the structure of the image brightness field is performed. This gives an opportunity to estimate dispersion relationship and the running effect of a brightness contrast packet. Comparison of the parameters obtained with the theoretical dispersion ratio of internal waves (IW) allows one to make a conclusion that IW surface manifestations are recorded in a frame.UDK 551.463.5 相似文献
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Yu. D. Chashechkin 《Physical Oceanography》2011,20(5):317-324
The methods of perturbation theory and integral representations are used to analyze the general properties of a system of
equations of the mechanics of inhomogeneous fluids including the equations of momentum, mass, and temperature transfer. We
also consider various submodels of this system, including the reduced systems in which some kinetic coefficients are equal
to zero and degenerate systems in which the variations of density or some other variables are neglected. We analyze both regularly
perturbed and singularly perturbed solutions of the system. In the case of reduction or degeneration of solutions, the order
of the system decreases. In this case, regularly perturbed solutions are preserved (with certain modifications) but the number
of singularly perturbed components participating in the formation of the boundary layers on contact surfaces and their analogs
in the bulk of the fluid, i.e., the elongated high-gradient interlayers, decreases. The interaction between all components
of the currents is nonlinear, despite the fact that their characteristic scales are different. 相似文献