共查询到19条相似文献,搜索用时 203 毫秒
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为使30万吨超大型矿砂船舶(VLOC)安全航经渤海老铁山水道,建立一套“VLOC渤海深水航路技术保障信息系统”,对覆盖渤海、黄海的风暴潮-天文潮耦合数值进行精细化计算,以提供航经渤海水域的潮汐预报,使得VLOC利用0.5~1.0m的潮汐,能安全通过预定航线到达卸货港. 相似文献
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据初步预测,1990年的风暴潮和海浪灾害发生的次数均较海洋灾害较为严重的1989年偏少。这是上海海洋环境预报区台近日发布的海洋灾害预报。虽然1990年的天文潮年极值比去年偏低20厘米,但自二十世纪三十年代以来,由于二氧化碳“温室效应”,导致两极冰盖范围缩小,全球海平面缓慢上升;同时随着地下水及其它资源的不断开采,地面在缓慢 相似文献
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通过台风期间北仑港实测潮位、波浪资料统计分析,研究台风期间风暴潮增水特性和统计规律,采用概率统计理论研究风暴潮增水和波浪的相关性,建立风暴潮增水与波高的联合分布,提出考虑风暴潮影响的设计潮位、波浪组合的推算方法。 相似文献
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蓬莱海域的潮汐潮流特征分析 总被引:1,自引:0,他引:1
基于2007年10月的水文测验资料,分析了蓬莱海域沿岸东西两侧在不同潮波系统控制下的潮汐潮流变化特性.分析结果表明:蓬莱东岸属正规半日潮,蓬莱西岸属不正规半日混合潮,潮流的性质与潮汐不同,东、西两岸的潮流都为不正规半日混合潮流.潮波自北黄海经渤海口门以接近前进波的形态向渤海内传播. 相似文献
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黄渤海风浪气候统计分析 总被引:4,自引:0,他引:4
了解掌握黄渤海风浪气候规律和特征,对于海上运输、海域工程施工及港口建设、石油钻井开采、军事和海上生产活动等,均有着重要意义;同时,加强海洋气候的科学研究,提高海浪预报准确率,对于减少海洋气象灾害也有着十分显著的经济和社会效益。 相似文献
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The Chesapeake Bay is vulnerable to severe flooding caused by hurricanes and strong Northeasters. A 3D storm surge model of the Chesapeake Bay is developed for studying the impact of model domain size, wind directions and Ekman transport on the storm surge in the Chesapeake Bay. The model encompasses the Chesapeake Bay and the US East Coast shelf to reduce the influence of model domain size on surge prediction inside the Chesapeake Bay and to account for both local and remote wind effects. This study used 3D model experiments, with respect to different wind directions, to diagnose the relative influences of the local and remote wind effects and Ekman transport on spatial surge distribution during storm events. The model results confirmed that spatial surge distribution can be well explained by the superposition of two distinct physically driven mechanisms during a storm event: incoming surge wave caused by remote effects and local wind forcings. A large model domain is a necessity for predicting storm surge accurately inside the Chesapeake Bay. The model results suggest that the interactions of the incoming surge propagating into the Bay and the local wind forcing from N and NE directions result in an enhanced setup in the lower to middle portions of the Bay, whereas the superposition of incoming surge and the local wind forcing from S and SE directions enhance the surge in the upper Bay region. A combined northwesterly wind over the middle to upper portions of the Bay and southwesterly wind over the lower Bay can cause a large setdown throughout the entire Bay. The Ekman setup along the coast contributes significantly to the water level variations during storm events. It enhances (reduces) surge inside the Bay under the wind forcings from N and NE (SW, S, and SE) directions. 相似文献
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基于遗传算法的滩海路路面结构优化设计研究 总被引:1,自引:0,他引:1
滩海路是为了开发丰富的滩海石油资源而修筑的联系陆地与人工岛的纽带。浅海滩涂地带受潮汐影响,水陆界伸缩很大,这就造成了滩海路建设具有费用高、风险大、工期长、维修费用高的特点。近年来,滩海路出现了漫水路的结构型式,其路堤高程较低,路面允许潮水淹没和通过,潮水过后可恢复通车使用。路面结构是构成滩海路堤工程建设总费用的重要部分,其合理确定对于降低工程建设总费用、确保工程建设质量都是至关重要的。文章以遗传算法作为基本数学工具,结合全寿命周期成本理论,建立了滩海路路面结构优化设计模型,并对渤海海域某工程地的滩海路路面进行优化设计,同原设计比较表明:利用该方法具有优越性,可以节省工程建设资金。 相似文献
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Dagmar Hainbucher Wei Hao Thomas Pohlmann Jürgen Sündermann Shizuo Feng 《Journal of Marine Systems》2004,44(3-4):153
The circulation and the hydrography of the Bohai Sea are simulated with the Hamburg Shelf Ocean Model (HAMSOM). The model is three-dimensional, prognostic baroclinic and has a resolution of 5 min in latitude and longitude and 10 layers in the vertical. It is initialised and forced with the five main tidal constituents, temperature and salinity distributions taken from the Levitus database, monthly mean river run-off values and European Centre for Medium Range Weather Forecast (ECMWF) re-analysed data of air pressure, wind stress and of those parameters relevant for the calculation of heat fluxes. The simulation period covers 14 years from 1980 to 1993 due to the availability of the time-dependent ECMWF forcing.The results are analysed by means of time series and EOFs focussing on the interpretation of fluctuations with periods above the tidal cycle. Furthermore, tracer simulations are carried out and turnover times are calculated in order to evaluate the importance of these fluctuations on the renewal and transport of water masses in the Bohai Sea.One of the major outcomes of the investigation is the overall dominance of the annual cycle in all hydrographic parameters and the importance of stochastic weather fluctuations on the transport of water masses in the Bohai Sea. 相似文献
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