天津海河隐伏断裂的晚第四纪活动特征研究

在海河隐伏断裂精确定位的基础上 ,文中利用天津地区晚第四纪地层中的 4个海相地层作为标志层 ,通过地质钻孔勘探、微体古生物鉴定、地层对比及年代学测定和研究 ,获得了海河断裂的晚第四纪活动特征。研究表明 ,海河断裂在天津市区段的上断点埋深为 2 1m ,对应的最新活动时代为晚更新世晚期至全新世早、中期 ,塘沽区段的上断点埋深为 16 4m ,最新活动时代已进入了全新世早、中期 ;天津市区段在晚更新世晚期 (36 2 90aBP)以来 ,垂直运动速度为 0 2 4 8mm/a ,塘沽区段全新世(72 0 0aBP)以来的平均垂直运动速率为 0 333mm/a。这表明海河断裂塘沽区段 (东段 )的活动性明显高于市区段 (西段     

物理海洋学家──孙孚教授

孙孚，男，出生于1941年7月21日，山东青岛人，汉族。1961年于山东师范大学物理系毕业，1985年于山东海洋学院物理海洋专业获我国授予的第一个海洋学理学博士学位。此后曾以高级学者身份赴加拿大英属哥伦比亚大学访问。现任青岛海洋大学海洋环境学院院长兼国家教委物理海洋部门开放研究实验室主任，教授，博士生导师，山东省专业技术拔尖人才，国家有突出贡献的中、青年专家，享受国务院颁发的政府特殊津贴。主要从事海浪理论与应用的教学和研究工作，近10余年在《中国科学人《科学通报人《海洋与湖沼人《海洋学报人忡国海洋湖沼学报》（英…     

中国反射地震"陆相断陷模型"简介

为了提高反射地震数据处理方法研究水平 ,验证各种速度建模及偏移成像算法的实用效果 ,ＩＦＰ(ＩｎｓｔｉｔｕｔＦｒａｎｃｏｉｓｄｅＰｅｔｒｏｌｅ)、ＳＥＧ/ＥＡＧＥ等地球物理组织 ,在 90年代先后推出了二维Ｍａｒｍｏｕｓｉ模型和三维盐丘模型 ,业已成为勘探地球物理界的标准模型 .显然 ,这两个模型是基于欧美及中东国家的地质背景 ,反映海相沉积特点的 .为促进陆相油储地球物理学的发展 ,满足我国油田对方法技术发展的需求 ,使检验地震处理方法的地质模型能够体现我国陆相沉积的具体特点 ,经国家自然科学基金会重大项目“陆相油储地球…     

Relation Between the Evolution of Earthquake Precursory Field and the Nonlinear Concentration of Energy

The evolutional process of precursory fields for the Tangshan earthquake with MS7.8 and the Datong earthquake with MS6.1 was simulated by using the process of regional energy concentration for the nonlinear vibration in inhomogeneous media. The results show that the various precursory features observed during the seismogenic process would be related with the nonlinear concentration of energy in the crust.     

<内陆地震>编辑部声明

本刊自1999年第3期入编<中国学术期刊(光盘版)>和加入"中国期刊网".<中国学术期刊(光盘版)>免收作者版面费,并免费提供作者引文率统计资料.作者可通过所在单位设立的中国学术期刊文献检索咨询站免费查询检索本人在<光盘版>中发表文献的被引用情况.单位未设中国学术期刊文献检索咨询站的作者,可直接向清华大学总站查询.本刊加入"中国期刊网"后,作者著作权使用费与稿酬本刊一次性给付.凡本人文章不愿在<中国学术期刊(光盘版)>上刊载或不同意将文章编入"中国期刊网"数据库的作者,请在来稿时声明,本刊将作适当处理.     

《海洋工程》2018年36卷第4期目次

CN 32-1423/P*1983*b*A4*156*zh*P*Y30.00*3000*17*2018-07     

Dredging influenced sediment toxicity of endosulfan and lindane on black tiger shrimp （Penaeus monodon Fabricius） in Chantaburi River estuary in Thailand

Series of experiments, including background sediment elutriate, spiked-sediment elutriate and spiked- water toxicity tests, were carried out to study the effect of dredging on survivability and ecological competence of commercially important shrimp postlarvae of Penaeus monodon Fabricius. The test sediment represented the most contaminated from endosulfan and lindane in the Chantaburi river mouth estuary. The maximum sediment contamination levels were 49.4 μg/kg of endosulfan and 58.1 μg/kg of lindane in dry weight basis. Dose-response studies in static, non-renewal spiked-sediment elutriate toxicity tests revealed that LC 50 （96 h） values for survival effect based on measured concentrations were 0.50 （0.26-0.95） μg/L for endosulfan and 0.92 （0.63-1.34） μg/L for lindane. The LOECs for endosulfan and lindane were 0.141 and 0.429 μg/L, respectively. The NOECs were estimated to be the dissoluted endosulfan and lindane concentrations from the Chantaburi estuary sediment. The effects on phenoloxidase enzyme activity in shrimp postlarvae exposed for sub-lethal to lethal doses in sediment elutriate were not significant （p〉0.05） at all tested dose levels. The worst case dissolution concentrations of endosulfan and lindane in the water column upon simulatory dredging in the Chantaburi estuary were found to be toxic to shrimp postlarvae on lethal and sub-lethal effects. The NOECs of respective chemicals （i.e., 0.034 and 0.16 μg/L） shared the same orders of magnitude for corresponding NOECs established for whole salt water aquatic life by the USEPA and ＂safe＂ levels calculated by 0.01 safety factor approach. In addition, the significance of multiple pollutant assessments for ecological toxicity testing is highlighted.     

Numerical simulation of tidal current and erosion and sedimentation in the Yangshan deep-water harbor of Shanghai

Yangshan near-shore sea area is the multi-island and multi-channel area with strong flow velocity and high suspended sediment concentration. Based on the characteristics of tidal currents, waves, and sediment in the Yangshan area, a two-dimensional numerical model of tidal currents, sediment transport, and sea bed deformation is developed. In the model, the effects of tidal currents and wind waves on sediment transport are considered. According to characteristics of the study area, unstructured grids are applied to fit the boundaries of the near-shore sea area. The results show that the calculated values are in good agreement with the measured data. The field of tidal currents, suspended sediment concentrations, and the deformation of the seabed can be successfully simulated.     

Large-Eddy Simulation of Wind-Turbine Wakes: Evaluation of Turbine Parametrisations

Large-eddy simulation (LES), coupled with a wind-turbine model, is used to investigate the characteristics of a wind-turbine wake in a neutral turbulent boundary-layer flow. The tuning-free Lagrangian scale-dependent dynamic subgrid-scale (SGS) model is used for the parametrisation of the SGS stresses. The turbine-induced forces (e.g., thrust, lift and drag) are parametrised using two models: (a) the ‘standard’ actuator-disk model (ADM-NR), which calculates only the thrust force and distributes it uniformly over the rotor area; and (b) the actuator-disk model with rotation (ADM-R), which uses the blade-element theory to calculate the lift and drag forces (that produce both thrust and rotation), and distribute them over the rotor disk based on the local blade and flow characteristics. Simulation results are compared to high-resolution measurements collected with hot-wire anemometry in the wake of a miniature wind turbine at the St. Anthony Falls Laboratory atmospheric boundary-layer wind tunnel. In general, the characteristics of the wakes simulated with the proposed LES framework are in good agreement with the measurements in the far-wake region. The ADM-R yields improved predictions compared with the ADM-NR in the near-wake region, where including turbine-induced flow rotation and accounting for the non-uniformity of the turbine-induced forces appear to be important. Our results also show that the Lagrangian scale-dependent dynamic SGS model is able to account, without any tuning, for the effects of local shear and flow anisotropy on the distribution of the SGS model coefficient.