鹅头型分汊河段变化特征及治理措施

鹅头型汊道是长江中下游典型的弯曲分汊河型之一,窑监、陆溪口、罗湖洲等水道就属于这类河型.鹅头型汊道往往多汊并存、洲滩易变、航槽摆动、河道变化频繁.为了保障航道畅通,稳定河势必须对此类河道进行整治.根据有关资料,分析鹅头型汊道的变化特征及碍航特点,结合目前已实施的几个鹅头型分汊河道航道整治工程,提出鹅头型汊道的治理方法.     

三峡水库运行后长江中下游分汊河段航道治理

三峡水库蓄水运行后,长江中下游分汊河段出现冲淤不平衡,汊道分流关系显著调整,从而导致航道浅滩碍航特性存在差异。在长江中下游分汊河段河床演变、浅滩碍航特性等研究基础上,探讨分汊河段航道治理思路,主要结论为：1)分汊河道浅滩段以冲刷为主,逐渐显现洲滩冲刷萎缩、滩槽形态不利调整等特征;2)分汊段的洪水主流汊道分流比减小,顺直分汊与弯曲分汊的洪水分流比下降幅度小于中枯水时期,而鹅头形分汊河型洪水分流比降幅大于中枯水;3)三峡水库蓄水后通航主汊道对分流的控制力度减弱,进口处出现交错或散乱的不良浅滩形态,航道条件趋于恶化而浅滩出浅碍航;4)分汊河段治理可采取分步控制,实施洲滩控导、边心滩塑造或支汊调控技术等整治措施,达到维持或提高航道尺度的目的。     

长江下游太子矶水道近期航道稳定性分析

针对太子矶水道鹅头型分汊河段航道稳定性问题,依据实测河道地形、水文资料,分析太子矶水道近期演变及航道条件。结果表明:太子矶水道保持左支右主的两汊格局,右汊内东港在枯水期主槽地位明显,但西港有所发展;河段内已实施的炸礁工程仅增加了东港的枯季分流,中洪水期主流走直,凸岸低滩的冲刷切割仍有可能,西港仍有缓慢冲刷发育的空间;在水流分散区内江心心滩变化频繁,影响东港的航道条件。需要关注西港发展和江心心滩冲淤变化以及西港发展对东港进口及中段航道条件的影响。     

分流比相当的典型分汊河段航道治理方案研究

长江干流分汊河段众多,自然条件下,分汊河道内心(边)滩冲淤交替,主流随河床冲淤在多汊间调整,不利于航槽边界稳定,对于分流比相当的分汊河段(如戴家洲河段)航道治理技术则更为复杂。本文以戴家洲河段为例,分析了河段、浅滩演变特点及发展趋势,提出了“整疏结合”的治理思路,并通过试验分析优化了整治方案。成果可为类似河段河道治理提供借鉴。     

长江中下游顺直放宽和弯曲分汊连接段河道特征及治理思路*

对长江顺直放宽和弯曲分汊连接河段宽、直、弯、汊的形态特点进行了初步剖析,分析说明了连接河段航道影响因素,并以典型河段为例进行说明;通过分析提出连接河段航道治理思路以守护分汊河段洲头低滩、限制河床横向变形、稳定分汊段进口洲滩形态为主,将过渡段塑造成枯水期曲率合理平顺优良形态.     

长江中游典型微弯分汊河段择汊问题探讨

分汊河段整治的核心问题为择汊,因为它的确定将派生和决定航道整治工程的总体平面布局,而布局的合理性是工程成败的关键。通航汊道的选择问题,实质上就是分汊河段的航线选择问题,不过它较单一河槽河型航线选择要复杂得多。研究认为通航主汊应选择分水多、分沙少、呈发展趋势的一汊,具体到实际滩段须从两汊的现状条件(如分流分沙、航道条件等)、航道尺度发展水域、河型特征等进行全面的对比,综合分析两汊各种利弊条件。在戴家洲河段汊道近期河床演变和碍航特征分析基础上,对该分汊河段的两汊优缺点进行分析总结,提出选择戴家洲直港作为该河段的通航主汊道。     

长江下游安庆水道河床演变和航道整治思路

文章对安庆水道在三峡工程蓄水前后的演变规律进行了分析,表明自然条件下洲滩周期性变化,河道汊道条件变化较为剧烈,航道条件时好时差,稳定性较差。三峡蓄水后,安庆河段演变规律保持不变,在新洲向右淤长的发展趋势下,左汊进口航道条件向不利方向发展。在河势控制工程实施后,一定程度上改变了新中汊边界条件,河道的周期性演变有所趋缓,有利于维持当前的三汊格局。在总结河段碍航特性的基础上,提出了限制新中汊发展,调整分流、稳定洲滩和束水冲槽的整治思路,以期解决安庆河段的碍航问题。     

长江中游戴家洲河段航道整治思路探讨

对长江中游戴家洲河段的航道变迁及碍航特点进行了分析。依据河床演变分析,对分汊河段的择汊问题进行了探讨,对航道整治原则进行了深入思考,并确定整治原则为:维持分汊、择汊直港,守控洲头、调整水流、护岸守滩,综合布局、统筹兼顾。进而提出了3个航道整治基本思路,并根据航道整治目标河型的概念选择了目标河型。在河床演变分析及整治思路的基础上,提出了航道整治工程总平面布置设想。     

长江中游安庆河段航道整治一期工程效果分析

安庆河段为三汊分流水道,左汊为主航道。近年来中汊发展迅速,威胁到左汊分流,再加上新洲洲体多由细砂组成,极不稳定。新洲洲头的冲刷后退将使左汊进口条件变差,主航道有可能进一步向不利方向变化。本文从工程建设完工之后水道河势、深泓、洲滩、分流比等方面对工程效果和航道条件进行了分析。结论表明,航道整治工程实施以来,航道条件有所改...     

长江下游连续分汊段汊道演变的关联性研究

长江下游安庆河段由安庆水道、太子矶水道、贵池水道3个连续多分汊河道组成,近期3个汊道段河床演变复杂。依据实测水文、地形资料和数学模型计算等手段,分析3个连续汊道段在水流动力、流速分布、水位及分流比变化方面的关联性,并提出在河道治理及航道整治中应注重保有汊道间过渡段及维持关键洲滩岸线稳定的建议,可为类似工程提供借鉴。     

Errata

正In the paper"Influence of Fouling Assemblage on the Corrosion Behaviour of Mild Steel in the Coastal Waters of The Gulf of Mannar,India"in Vol.12,No.4,Page:509,References were lost,and the two authors’biographies were identical.The correct text is shown below.We apologize to the authors and our readers for any inconvenience caused by the errors.     

Journal of Marine Science and Application 2014 Sum. Contents

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33rd International Conference on Ocean,Offshore and Arctic Engineering （OMAE2014）

正San Francisco,California,June 8-13,2014.OMAE 2014 is the ideal forum for researchers,engineers,managers,technicians and students from the scientific and industrial communities from around the world to:·meet and present advances in technology and its scientific support;·to exchange ideas and experiences whilst promoting technological progress and its application in industry·to promote international cooperation in ocean,offshore and arctic engineering.In line with the tradition of excellence of previous OMAE conferences,more than 900 technical papers are planned for presentation.Outreach for Engineers Specialty Forum This Specialty Forum is designed for students and professionals who may not be familiar with the Ocean and Offshore industry,as well as those who have just recently specialized in this field.     

联合作战计划和执行系统

全球指挥控制系统(GCCS)实施当前美国海军网络中心战信息基础设施的联合计划网络。联合作战计划和执行系统(JOPES)支持GCCS实现联合计划。JOPES有两类计划：时间不限的精密预案计划生成作战计划、方案计划或职能计划；时间敏感的危机行动计划生成作战命令或战役方案。前者在和平时期创建的作战计划是后者的计划基础，加速应付危机的能力。     

Recent progress on wave induced loading measurements in warships

Recent measurements of wave induced hull strain and flexure in RN warships are presented together with the derivation of the current design criteria for extreme hull girder bending loads. The history of the development of the shipboard instrumentation used is given and recent developments to improve the quality and ease of analysis of the data are described. An unexpectedly high transverse asymmetry in the longitudinal strains measured in destroyers is shown to be the result of a combination of vertical and lateral bending in oblique seas. Finally recent theoretical comparisons between the loading of Deep-Vee hulls and conventional UK rounded bilge hulls are presented which demonstrate the higher loading experienced by this type of hull form.     

The 11th International Conference on Hydrodynamics (ICHD 2014)

正19–24 October 2014 SingaporeCONFERENCE THEMES The overall aim of the ICHD Conference is to provide a forum for participants from around the world to review,discuss and present the latest developments in the broad discipline of hydrodynamics and fluid mechanics.The first International Conference on Hydrodynamics(ICHD)was initiated in 1994 in Wuxi,China.Since then,9 more ICHD conferences were held subsequently in Hong Kong,Seoul,Yokohama,Tainan,Perth,Ischia,Nantes,Shanghai and St Petersburg.Evidently the ICHD conference has become an important event among academics,researchers,engineers and operators,working in the fields closely related to the science and technology of hydrodynamics.The 11th ICHD will be held in Singapore in 2014.     

第十二届深水操作会议和展览会(英文)

正November 4-6,2014Moody Gardens HotelConvention Center/Galveston,TX The Deepwater Operations Conference and Exhibition is celebrating its 12th anniversary this year.This growing event will continue the tradition of excellence in addressing operational challenges involved in developing deepwater resources.We will return to the Moody Gardens Hotel and Convention Center on November 5-7,2014 in Galveston,Texas.     

Eastbound or westbound ?

In terms of equal sailing distances, where is the inflexion when ships depart from ports in the Asian Continent to New York via Suez and/or Panama？
The answer is China South Port Group （Hong Kong, Shenzhen and Guangzhou）.     

Impact of regulation on the performances of long-distance transport services: A comparison of the different approaches in Sweden and Norway

Despite the many socio-economic similarities between Sweden and Norway, differences in jurisdiction, organisation, cooperation, and financing of long-distance passenger train and coach services have led to the development of four distinctively different ways of serving the markets. This paper describes how the train and coach markets have developed in the two countries, with emphasis on regulatory and industrial structure and a couple of performance variables.Looking at passenger rail, both countries separated infrastructure from operation over a decade ago. However, while Norwegian rail is characterised by an almost monopoly supplier, rail services in Sweden are partly decentralised to the responsibility of county authorities and are widely subjected to competitive tendering. The rest of the network is about to be opened up for on-the-track competition. Swedish Rail (SJ) has spent the last decades consolidating its core business (passenger rail) and sold out its other businesses. In contrast, the Norwegian state rail (NSB) has expanded its business to become a major bus operator and property owner, with extensions also into the Swedish market.The coach industry was more recently deregulated in both countries. The Swedish coach market is dominated by privately owned companies operating services to and from Stockholm. In Norway, state-owned NSB is a major coach operator on medium distance routes, and is also the largest partner of Nor-Way Bussekspress which totally dominates long-distance coach services. Further, the Norwegian coach market is characterised by cross-ownership and cooperation which has enabled an extensive route network which covers most of Norway.We find distinct differences in achievements in the two modes and in the two countries. Swedish rail services have succeeded in winning market shares and in renewing and developing both infrastructure and service levels to a greater extent than the Norwegian model. On the other hand, the Norwegian coach market seems to be more developed and efficient compared to its Swedish counterpart.The paper concludes with a discussion on the possible links between the different approaches and the performance observed, with the aim to stimulate further and more detailed research on some important issues.     

某海港码头的撞损修复

依据码头撞击受损区域调查检测结果,对受损构件提出合理的修复方案,为码头的安全运行提供保障。