岸线变化对天津近岸海域污染物输移扩散影响研究

应用MIKE21数学模型对天津近岸海域潮流场进行数值模拟,同时考虑天津近岸海域5个典型河口污染物输入的影响,计算了大小潮作用下COD输移扩散范嗣,并研究了岸线变化对COD输移扩散范围的影响.结果表明,岸线的变化对北塘口及天津港附近COD的输移扩散有较大影响.岸线变化后,大小潮高低潮时刻对应的0.001 mg/L浓度等值...     

大水位差港口客运缆车控制系统方案设计

针对大水位差港口的水文特征和地理特征 ,提出了其客运缆车控制系统的技术方案。该方案运用先进的控制技术和网络通信技术 ,大大加强了对缆车的运行管理和监控力度 ,提高了安全性和可靠性     

The implications of MARPOL Annex V on the management of ports and coastal communities

Abstract

The passage of the Marine Plastics Pollution Research and Control Act of 1987 (MPPRCA), which codified Annex V of the International Convention for the Prevention of Pollution from Ships (MARPOL), has encompassed every commercial and recreational shipping and boating facility in the United States. As a group, these ports, harbors, and marinas form a significant, although proportionately small, portion of the coastline of the country. More important, the economic benefits derived from the complex shoreside infrastructures required for international ocean trade, commercial and recreational fishing, and pleasure boating indicate just how critical it is for these facilities to be in conformance with effective and prudent coastal zone and environmental management practices.     

Plan implementation in the Florida keys through land acquisition

Abstract

The Florida Keys are an example of a fragile resource threatened by development. The early division of the area into small lots made conventional planning and regulation difficult. This paper describes the creation of a conservancy for the Keys—the history of development, the conditions necessitating a conservancy, and the political wrangling it took to implement the conservancy.     

Decentralized Coastal Zone Management in Malaysia and Indonesia: A Comparative Perspective 1

Transferring decision-making process from central to local government and enhancing the role of local communities in managing coastal zones is an increasing commitment by governments in Southeast Asia. This article analyzes decentralized coastal zone management in two neighboring countries, Malaysia and Indonesia. The Federal system in Malaysia is argued to be able to influence more decentralized coastal zone management and to promote community-based management approaches. Meanwhile, the large diversity of coastal resources and communities combined with a still as yet tested decentralization policy in Indonesia is argued to bring more challenges in implementing the decentralization and community-based approaches in coastal zones. The lessons learned in this study provide insight in how far decentralized coastal zone management has taken place in Malaysia and Indonesia. The significant differences in the pattern of coastal zone management in these two countries are discussed in detail. This study recognizes that co-management and community-based approaches can be appropriate in dealing with coastal zone management. This comparative perspective is important to the development of a bigger picture of sustainable coastal zone management processes and cross-regional knowledge-sharing in Southeast Asia.     

Introduction to the Theme Issue: The Role of Geography in Contemporary Coastal Management Policy and Practice

This article provides a brief introduction to the theme issue on “The role of geography in contemporary coastal management policy and practice.” The theme is addressed through a suite of seven articles that collectively consider how geographical understandings and methods relate to contemporary coastal policy and practice. The key theme to emerge from the articles is that geography forms an underlying framework for considering integrated coastal management, largely due to the integrative nature of geography itself.     

天津滨海地区地铁工程耐久性影响因素分析

鉴于天津滨海地区地铁工程环境的复杂性和特殊性,对影响耐久性的氯离子侵蚀、硫酸盐侵蚀、杂散电流、碳化破坏和冻融破坏等主要外部工程环境因素进行了分析和阐述,主要分析了其成因、机理及现行规范中的相关规定等,为工程的耐久性设计、施工及运营提供参考借鉴。最后建议天津滨海地区地铁工程建设引入针对性的耐久性专题研究,以保证百年设计目标的顺利实现。     

沿海成品油船船型开发调查研究

介绍沿海成品油油运市场对油船的需求情况以及沿海港口对成品油船设计的限制条件,探讨规范的变化对成品油船结构的影响并对现有成品油船技术状况及存在的问题进行分析,总结了现有油船船型的特点,提出开发沿海成品油船新船型的建议。     

沿海地区雨水系统规划研究

前后海片区是深圳特区内填海较集中的地区,排水隐患较多。该文对现状雨水系统进行了分析,指出现状雨水系统存在的问题,并对问题原因进行分析,提出前后海片区雨水系统规划的原则和标准。同时对排水设计标准、旧村改造、山洪截流、填海方式、排水设施维护管理、填海施工组织等方面提出具体改造对策。可供沿海城市类似的雨水系统规划设计参考。     

临海环境对衬砌混凝土结构自防水性能影响研究

为获得合理的临海隧道衬砌混凝土配合比和提高混凝土自防水性能,以拱北隧道工程为背景,开展混凝土在临海侵蚀环境下的自防水性能试验研究。基于系统化的混凝土配合比设计方法确定防水混凝土初步配合比,通过碳化和硫酸盐侵蚀室内试验模拟临海环境对混凝土自防水性能的影响,对混凝土抗压强度、抗水渗透和抗氯离子渗透3个指标进行试验分析,最终获得最优配合比。结果表明： 1）复掺(20%粉煤灰+10%矿渣)混凝土自防水性能最好,该方案可作为拱北隧道主体结构混凝土配合比; 2）在碳化和硫酸盐侵蚀作用下,混凝土的抗氯离子渗透能力随时间逐渐减弱、抗压强度随时间逐渐增强; 3）混凝土掺合料对抗氯离子渗透能力的增强作用非常明显,但对混凝土后期强度增幅有一定的影响。