三峡水库变动回水区三角碛河段消落期维护疏浚方案

三峡水库175 m试验性蓄水以来,变动回水区典型河段出现了卵砾石淤积碍航的问题,其中又以三角碛河段表现尤为明显。三角碛河段位于重庆港区九龙坡港前沿,属于典型宽谷分汊浅滩,主航道弯、窄、浅、险。由于三峡水库蓄水引起泥沙冲淤规律变化,航道演变也出现新的特点,主航道泥沙淤积量不大,但对航道条件影响较大,消落期多次出现船舶搁浅事故。为改善三角碛河段消落期航道条件,对其实施维护性疏浚是很有必要的。通过实测资料分析,对三角碛河段泥沙冲淤变化特点进行研究,探讨疏浚设计方案,并分析疏浚效果。     

三峡库区上洛碛河段消落期维护疏浚方案

受三峡水库175 m试验性蓄水影响,三峡库区上洛碛河段发生泥沙累积性淤积,泥沙主要落淤在河段深槽及边滩,淤积量不大,但上洛碛河段在消落期航道尺度富余不大,边滩少量泥沙淤积也能恶化该处航道条件。利用实测地形资料,对2011—2012年度上洛碛河段航道条件变化进行分析,并提出消落期相应的航道维护方案。     

三峡水库变动回水区三角碛浅滩冲淤与碍航特性分析

变动回水区河段的侵蚀基准面在蓄水期抬升,在消落期和汛期逐渐恢复为天然河段状态,因此变动回水区内碍航浅滩的冲淤特性将发生改变。以三峡水库变动回水区三角碛浅滩段为例研究浅滩年际年内的冲淤及碍航特性的变化。结果发现,水库蓄水位抬升到175 m前,三角碛浅滩段年内遵循"汛淤枯冲"的规律,年际间则由于上游来沙量大幅减少,水流处于不饱和状态而表现为累积性冲刷,且随着水流不饱和程度的提高,冲刷强度增大;2008年汛后三峡开始试验性蓄水后,三角碛浅滩段由天然河段变为变动回水区河段,下游侵蚀基准面的抬升使河段具有淤积的趋向,上游来沙减少和下游侵蚀基准面抬升共同作用的结果是本河段冲刷强度显著下降,同时也未出现累积性淤积的现象。由于年内泥沙输移过程发生改变,主要走沙时期从汛末推移到次年的消落期,在通航标准不变的前提下,三角碛浅滩段的碍航程度可能会有所上升。     

三峡水库变动回水区洛碛河段年内冲淤变化过程*

针对三峡水库175 m蓄水后变动回水区典型河段冲淤特点变化及航道条件变化的问题,利用三峡水库变动回水区洛碛河段近期连续测图,采用实测地形图对比分析的方法,对洛碛河段年内冲淤过程进行研究,得到洛碛年内冲淤变化特点及对航道条件的影响,为航道维护管理及船舶航行安全提供参考。     

三峡水库蓄水以来重点淤积水道黄花城河床演变及航道变化

针对三峡水库蓄水以来常年回水区重点淤积水道黄花城出现泥沙累积性淤积的问题,根据三峡水库蓄水以来原型观测资料,分析黄花城水道蓄水以来水位变化、泥沙冲淤特性、典型断面冲淤变化和等深线变化,对该河道的航道条件变化和演变趋势进行预测。结果表明:黄花城水道存在细沙累积性淤积,主要淤积部位较为固定,2012年以前淤积速度、厚度和范围均较大,2012年以后随着上游来沙量减少的趋势渐缓,黄花城水道泥沙淤积速度逐渐减小。     

三峡水库175m蓄水后下洛碛河道冲淤变化分析

本文基于三峡水库175m试验性蓄水后的原型观测资料,分析三峡库区变动回水区下洛碛河段水沙变化、泥沙冲淤特性以及其原因。结果表明:三峡水库175m试验性蓄水后,河道水位明显抬高,径流量无趋势性变化,输沙量明显减少。下洛碛河道由累积性淤积逐渐转为冲刷,2012-2017年期间河道地形变化明显,2018年后下洛碛河道冲淤变化趋缓。     

三峡工程运用后水沙变化对世业洲汊道河床演变的影响*

长江南京以下河段以分汊河型为主，受径流和潮汐的共同作用，水沙运动及河床冲淤复杂。以南京以下12.5 m深水航道重点碍航浅滩之一的仪征水道为例，在已有研究成果的基础上，根据近期实测水文泥沙和地形资料，分析三峡水库蓄水前后仪征水道演变特性，探讨三峡枢纽运行后水沙变化对河床冲淤的影响。结果表明：三峡水库蓄水后，仪征水道河床冲淤与蓄水前有所不同。蓄水前世业洲左汊冲刷、右汊微淤，蓄水后左右汊均表现为冲刷下切；蓄水前大洪水对水道滩槽格局影响较大，蓄水后受水库调蓄影响，洪峰流量减小，水沙对滩槽格局的影响有所减弱。     

长江下游牧鹅洲水道河床演变特征及航道条件分析

随着三峡水库持续运行,下游河段造床规律较以往有所变化,河床进行冲淤调整。基于牧鹅洲洲水道三峡蓄水后2003—2016年原型观测资料,分析蓄水后该水道河床的冲淤变化情况。结果表明,该水道呈中高滩冲刷、低滩淤积、河槽有冲有淤的态势,这可能给本水道自身较好的航道边界条件带来不利影响,同时极可能影响下游湖广水道进流条件。在此基础上,对本水道航道条件变化趋势进行预测,认为目前比较优良的航道条件在自然作用下可能向不利方向发展,为本水道航道治理思路的形成和工程设计提供参考。     

三峡水库蓄水后关洲水道河床演变特征及航道条件变化

三峡水库蓄水运用后,下游河段发生河流再造床过程,河床进行冲淤调整。基于关洲水道三峡蓄水后2003—2013年原型观测资料,分析蓄水后该水道河床的冲淤变化情况。结果表明:该水道在三峡蓄水后总体处于冲刷态势,尤以左汊冲刷明显,这对该水道两汊分流产生较大影响,进而影响主航道条件,同时进一步恶化下游芦家河水道进口航道条件。在此基础上,对本水道航道条件变化趋势进行预测,认为目前比较优良的航道条件在自然作用下存在恶化的可能,为本水道航道治理思路的形成和工程设计提供参考。     

三峡蓄水后鲤鱼山水道演变对航道的影响与对策研究

三峡蓄水后改变了长江中游许多放宽河段原有冲淤规律,导致航道条件出现不利变化。通过对三峡蓄水后鲤鱼山水道洲滩演变的分析,研究了洲滩间的关系,揭示了河段洲滩演变与航道变化之间的关系,明确了近期河段航道不利变化是三峡蓄水影响下黄莲洲频繁冲淤、南槽冲刷发育、厍家湾边滩低滩周期性冲淤变化综合作用的结果,并据此提出稳定北槽边界,增强主航道枯水水动力条件的治理对策。     

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。