江苏沿海滩涂资源及发展趋势遥感分析

遥感技术用于广袤宽阔、复杂多变而难以实地勘测的潮间带资源调查是科学和最有效的选择。作者以三期低潮位卫星遥感数据图像为基础，对江苏沿海潮间带滩涂资源的总量、分布特点、发展趋势及开发利用前景进行了分析，指出了江苏滩涂资源总量呈减少趋势，匡围量大于可供匡围的滩涂资源生长量，应加强对滩涂资源开发利用规划和统一管理。     

Distribution Characteristics of Heavy Metals and Grain Size of Sediments from Hailing Bay, China

Introduction Hailing Bay located in western Guangdong province is an important marine aquaculture base and a famous scenic spot. Moyang River which flows across Yangjiang is the major runoff and polluted source in the sea area of Hailing Bay. Hailing Bank ( approximately 5 000 m ) which was built to connect Hailing Island and the continent in 1964 has blocked the natural circulation of suspended sand and pollutants in seawater. Water flux through the Yangjiang harbor extensively decreases …     

闽台水产加工业的发展现状与合作前景

本文分析了闽台水产加工业的发展现状、面临的主要问题以及加入世贸组织后对产业的影响，预测未来两岸水产加工业的发展前景。认为如两地能采取优势互补、合作开发、谋求共同发展，将有利于推动闽台两地水产加工业，乃至渔业生产的持续、健康、稳定地发展。     

微齿喜马拉雅低额溞生长及种群增长的研究

于1990年6月在哈尔滨市东北林业大学实验林场一水池中采到微齿喜马拉雅低额溞，根据实验结果应用生物统计学方法对它的生长和种群增长进行研究。结果表明，在不同温度条件下性成熟时间与水温的关系为，雌性（10-30°C）：h=8072t^-1.313（r=0.985, P＜0.01）；雄性（5-25°C）：h=1074t^-0.855（r=0.9844，P＜0.01）。在20±1°C条件下，其体长增长模型为：l_t=3.334-2.7345e^-0.1117t。龄期（x）与年龄（t，d）的关系为：雌体：t=0.07169x²＋1.3808x-1.7361；雄体：t=0.8425x²＋2.534x-1.8600。内禀增长率（r_m）为0.4076。种群增长呈“logistic”型，其方程式为：y=3625/[1+e^{(3.848-0.164t)}]。     

Role of Siliceous Fossil Dissolution in Downcore Variations of Grain Size and Water Content: Western Margin of Clarion-Clipperton Fracture Zone, NE Equatorial Pacific

Grain size and water content in box-core sediments from the Clarion-Clipperton fracture zone (C-C zone) in the northeast equatorial Pacific were analyzed in detail to understand the downcore variations across a hiatus between Quaternary and Tertiary layers. Grain-size distributions in the topmost core sediments show two modes: a coarse mode (peaked at 50 μm) and a fine mode (at 2-25 μm). The coarse mode disappears gradually with depth accompanied by the dissolution of siliceous fossil tests, whereas the fine mode coarsens due to the formation of authigenic minerals. Water content increases abruptly across a color boundary between an upper pale brown layer and a lower dark brown layer that is the hiatus between Quaternary and Tertiary layers. Abundant smectites and microvoid molds, which are created by the prolonged fossil dissolution in the underlying sediment, are attributed for the abrupt downcore variation of water content. Overall variations in grain size and water content in the topmost core sediments in the western C-C zone are possibly constrained by the dissolution of biogenic siliceous fossils. Variations in geotechnical properties related to these changes must be considered in the design of nodule collectors.     

实验室模拟海水结冰装置与试验

研究海冰的声学探测技术需要实际海冰和低温环境。介绍了设计制造模拟海水结冰的试验装置的方法。采用人工制冷技术在实验室环境下实现了封闭容器里海水表面冻结一定厚度的海冰。试验结果表明，将容器中接近冰点的海水持续冻结32h后，海冰的厚度达到20cm。对容器里的海冰进行了声波信号探测冰水界面的试验，为测冰声呐技术研究和测冰试验创造了有利条件。     

贝类育苗中几种水处理新方法应用的探讨

本文主要叙述磁化水、泡沫处理水、臭氧处理水、高分子重金属离子吸附剂在贝类育苗上的应用，介绍其使用方法、优点和不足，从而为贝类人工育苗创造出一个良好的水环境，使贝类育苗稳产高产。     

青岛奥运海域污染物浓度预测及污染控制对策研究

在已建二维潮流数值模型的基础上,利用物质输运方程模拟了奥运海域主要污染物的浓度分布。结果表明,奥运海域水质整体良好,但是无机氮对奥运水质的影响比COD、活性磷酸盐大,是奥运海域的隐患。为了保持奥运海域良好的水质,本文给出了一系列的污染控制对策,为环境管理者提供了一定的科学依据和建议。     

An Explicit High Resolution Scheme for Nonlinear Shallow Water Equations

The present study develops a numerical model of the two-dimensional fully nonlinear shallow water equations （NSWE） for the wave run-up on a beach. The finite volume method （FVM） is used to solve the equations, and a second-order explicit scheme is developed to improve the computation efficiency. The numerical fluxes are obtained by the two dimensional Roe＇ s flux function to overcome the errors caused by the use of one dimensional fluxes in dimension splitting methods. The high-resolution Godunov-type TVD upwind scheme is employed and a second-order accuracy is achieved based on monotonic upstream schemes for conservation laws （MUSCL） variable extrapolation; a nonlinear limiter is applied to prevent unwanted spurious oscillation. A simple but efficient technique is adopted to deal with the moving shoreline boundary. The verification of the solution technique is carried out by comparing the model output with documented results and it shows that the solution technique is robust.     

New Derivation of Ordinary Differential Equations for Transient Free-Surface Green Functions

Based on the Laplace transform, a direct derivation of the ordinary differential equations for the three-dimensional transient free-surface Green function in marine hydrodynamics is presented. The results for the 3D Green function and all its spatial derivatives are a set of fourth-order ordinary differential equations, which are identical with that of Clement (1998). All of these results may be used to accelerate numerical computation for the time-domain boundary element method in marine hydrodynamics.