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...     

城市交通需求管理创新：按照行驶里程定价与计费的车险

城市交通导致的一系列外部性问题日益严重,交通需求管理的作用尚未充分发挥。机动车辆保险创新可能是交通需求管理的一个有效方法。按照行驶里程定价与计费的车险是对传统车险的重大改进,能够有效减少交通量和缓解由此而导致的外部性,当前在我国大城市进行这一类型的车险业务创新可以创造良好的经济和社会价值。     

跨航道钢箱系杆拱桥拱梁整体顶推施工工艺

边坡监测是检验边坡防治效果的重要手段,监测结果的准确性、可靠性、及时性直接影响公路全寿命周期的安全。目前,针对滞洪区高速公路生态边坡的应用研究较少,护坡效果也尚未明确。因此,本文依托津石高速天津西段生态护坡工程的实际项目,设计开展滞洪区路基边坡稳定性监测试验和生态性监测试验,对边坡稳定性和生态性效果进行验证分析,为滞洪区路基边坡生态护坡设计施工提供技术参考和实践经验。研究结果表明：新型生态护坡的稳定性和生态性效果优于传统护坡,新型生态护坡技术具有广泛的应用前景。     

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。     

驾驶辅助技术在事故预防中的应用效果

越来越多的车型都搭载了驾驶辅助系统,部分驾驶人对这类系统的实际效果持怀疑态度。本文通过调研国内外相关研究,对几类主流驾驶辅助系统的事故预防效果进行综述。与相同条件下未安装驾驶辅助系统的车辆对比,研究人员发现多数驾驶辅助系统在事故预防方面发挥了明显的作用,降低了相关的事故率、保险索赔率,其中前向和后向的自动紧急制动系统效果最为显著。此外,驾驶人对驾驶辅助系统的接受度以及响应度均会影响事故预防效果。     

加快工程建设规范化、法制化,促进防洪、排涝工程监理的健康发展

本文主要介绍了日前福州市防洪、排涝工程监理存在的问题 ,面对二十一世纪 ,针对防洪、排涝工程监理事业的发展战略谈了看法。