浅议城市排涝与排水

对城市排涝与排水问题进行了探讨 ,提出有关见解。     

联程客运服务联盟建设运营模式和实施建议——以构建粤港澳大湾区“一票式”联程客运服务产业联盟组织为例

在综合交通运输一体化和粤港澳三地"硬链接"日益深化的趋势下,如何解决粤港澳大湾区客运体制机制壁垒问题,进而破解粤港澳三地交通运输服务"软联通"障碍成为当务之急。本文基于构建粤港澳大湾区特色"一票式"联程客运服务体系目标,研究建立粤港澳大湾区联程客运服务产业联盟的价值和意义,构思了联盟组织定位,设计了联盟成员选择和运作机制,从联盟目标设立、联盟职责制定、成员权利义务设置入手,系统、准确把握联盟需求和成员诉求协同机制,为构建粤港澳大湾区"一票式"联程客运服务产业联盟组织提供方向和参考。     

粤港澳大湾区船舶污染风险分析及防治对策研究

2019年2月18日中共中央、国务院印发了《粤港澳大湾区发展规划纲要》,其中航运清洁发展是重要的内容之一。面对粤港澳大湾区水路运输高速发展的态势,尤其是石油及其制品的运量快速增长,船舶及其有关作业活动对水域环境造成的污染风险越来越大,大湾区内各市均不同程度面临着严峻的船舶污染防治形势。为保障国家、行业以及《规划纲要》关于船舶污染防治措施和要求的落实,本研究对大湾区船舶污染风险进行了分析,梳理了大湾区船舶污染防治现状,并提出了相应的污染防治对策。     

Collaborative Integrated Management in Canada's North: The Role of Local and Traditional Knowledge and Community-Based Monitoring

The objective of this article is to take stock of integrated management in the Canadian North, assessing its contribution to the advancement of knowledge and practice regarding the role of indigenous knowledge and community-based monitoring. This is done in three steps. (1) The Beaufort Sea, designated a Large Ocean Management Area under Canada's Oceans Action Plan, is used as an example of a consultative planning process, with special attention to indigenous peoples. (2) How specifically can indigenous knowledge contribute to integrated management? The problem of Arctic marine food web contamination is used to illustrate the strengths and limitations of traditional ecological knowledge and its relationship to science. (3) The discussion of community-based monitoring relies on Voices From The Bay study involving the Inuit and Cree of Hudson and James Bay, and Inuit observations of climate change study in the Canadian western Arctic. The examples together address integrated coastal management and the health of ocean ecosystems, showing how stakeholder participation and knowledge helps widen the range of knowledge to understand and help monitor environmental change.     

胶州湾隧道浅埋分岔段的设计及施工关键技术

在胶州湾隧道工程中,为满足城市交通规划和区域交通疏导要求,采取设置地下分流匝道的设计方案。双车道匝道隧道与3车道主隧道在地下小角度交汇,形成分岔隧道。由于该分岔隧道段埋深浅、地层条件差、地面环境复杂,给设计和施工带来了不小的难度。通过工程类比、数值模拟分析等方法确定小净距隧道段范围,对变净距并行隧道中夹岩分区段采取扩挖换填混凝土、对拉锚杆等措施;在特大断面隧道段通过预注浆加固地层、加强初期支护,采用台阶分块开挖方案;施工中采用微震爆破技术,较好地保护了围岩,最终成功实现了此浅埋分岔隧道的快速施工。通过现场监控量测数据反馈分析,所采取的支护参数、工程措施、施工方案合理,确保了工程的安全、顺利建成。     

杭州湾北岸地区码头施工技术

杭州湾地区水域自然条件较恶劣,具有潮差大、水流急,受东南风影响风浪明显等特点;码头下部构件标高低,滩涂平缓栈桥长。文章主要针对这些特点以杭州湾的嘉兴港粮食中转库及外海码头工程施工为例,对受影响明显的码头各施工技术要点进行简要分析阐述,并总结经验供本区域类似码头工程施工参照借鉴。     

Use of SeaWiFS data for light availability and parameter estimation of a phytoplankton production model of the Bay of Biscay

Processing SeaWiFS (Sea-viewing Wide Field-of-view Sensor) data provides useful information for the observation and modelling of the phytoplankton production of the Bay of Biscay. Empirical algorithms allow the retrieval of chlorophyll a and non-living Suspended Particulate Matter (SPM) concentrations. These data are used to constrain a coupled 3D physical–biogeochemical model of the Bay of Biscay continental shelf. Two issues are investigated, depending on the variable used, to constrain the winter to spring phytoplankton production for the year 2001. First, SPM data is used as forcing data to correct the corresponding state variable of our model. This allows the realistic simulation of the light limited bloom at the end of February 2001, as observed with SeaWiFS chlorophyll a images and from the NUTRIGAS field cruise. Second, chlorophyll a data is used for parameter estimation of the biogeochemical model. The ability of assimilating these data is tested to improve the simulation of strong blooms observed in late May 2001 in the Loire and Gironde plumes. A global optimization method (Evolutive Strategies) is adapted to the complete 3-D coupled model, in order to find the best set of parameters. The hydrological conditions during the bloom can be validated with data from the PEL01 field cruise. After selection of the most sensitive parameters, the method is tested with twin experiments. Then, the use of real SeaWiFS data reduces the model/data misfit by a factor of two, improving the simulation of bloom intensities and extensions. The sets of parameters retrieved in each plume are discussed.     

海上大型预应力混凝土箱梁整孔预制与架设技术

杭州湾跨海大桥海上引桥全部采用70 m先简支后连续的预应力混凝土箱梁。介绍该70 m预应力混凝土箱梁整孔制造、陆上移运、海上运输架设及采用的新材料、新工艺和新设备。     

惠安核电厂取排水口工程海区冲淤演变分析

通过对惠安核电厂取排水口工程海区水文、泥沙及历年地形资料的分析,对该海区的泥沙来源、运移规律以及海床的演变特征和发展趋势进行了研究。