Focused on assessment & compensation for oil pollution damage from ships in dalian bay , the dissertation first makes a deep analysis of the inflection factors to oil pollution damage and then evaluates respective mathematical model , such as measurement of oil property , general models for diffuse and volatilization of such substances according to the numerical simulation of the tidal dynamics in the water of dalian bay . based on the corresponding oil pollution regulations , the scope and judgment criteria of oil pollution compensation are laid out . respective compensation measurement methods are developed after those of more mature international practice 文中剖析溢油事故可能造成损害程度大小的影响因素，包括建立石油化学数据库并将油品特性进行量化及通过对大连湾潮流和潮位的计算，建立溢油扩散、挥发模型等；依据现行油污赔偿法规，确定油污损害应予赔偿的范围和判定标准；吸收和借鉴国际上相对成熟的评估技术，建立各项损害的赔偿计算方法；运用visualbasic6 . 0对损害评估部分进行了计算机编程实现。
In this part , the first work is pretreatment of a numerical model , including creating calculating grids automatically , improvement of the linear boundary technique and so on . the second work is to estimate the siltation of a basin or channel by liu ' s equation . the third work is to build an edbms ( engineering data base management system ) for the result of mathematical model 其中主要的工作是：其中主要的工作一是数学模型的前处理，计算网格自动生成，线边界法的优化；二是应用刘家驹公式在长江口深水航道治理工程地理信息系统的支持下实现港池、航槽开挖的实时回淤估算；三是将计算成果形成gis管理和支持下的工程数据库系统( engineeringdatabasemanagementsystem ) ，同时尝试解决时间序列数据如地形冲淤变化，潮位、流速过程的分析、查询和显示问题，并实现实时、互动的动态演示及三维可视化。
Subsequently , the waves induced forces and their driven effects on currents are studied in detail . in the discussion of the effects of currents on waves , according to the wave radiation theory and the law of wave action conservation , the equivalence of none vorticity condition of the vector of wave number in constant wave field and fermat theory is testified . the dynamic and kinematics effects of background currents on waves are introduced concisely 在流对浪的作用讨论中，依据波动的射线理论和由变分原理导出的波作用量守恒定律，阐明了稳定波场波数矢量的无旋条件与费马原理的等价性，扼要讨论了背景流场影响海浪的运动学效应和动力学效应，首次指出水位(包括天文潮位与风暴潮位)变化对海浪成长与消衰的影响，为流浪潮联合数值模式的发展提供必要的理论依据。
Hydrology regime and river channel evolution become complex because of double influences of river flow and tide . there is little appropriate method so far . therefore , when the impact us assessed of water project on flood control , the following aspects should be focused on , river evolution and stability of project - sections , design tidal level , flood - tide combination scheme , pre - project and post - project impacts on river channel , water level and flow condition 长江河口段为潮流河段，径流潮流的双重作用使得区域水文情势、河道演变规律错综复杂，开展防洪影响评价研究时，河道演变及工程段稳定性分析，设计潮位的分析计算，洪潮组合方案拟定，工程前后对河道及水位流态影响的模拟等均是目前尚无十分成熟的方法，需要进一步研究的课题。
When choosing evaluative indexes , we take four aspects of fatalness of sea level rise hazards , vulnerability of land system , socio - economic and ecological vulnerability , and defending ability . we draw the map based on the relief map and the land utilizing map of 1 : 100000 scale , gain altitude values ( range of 1 km 1 km ) and the fundamental data of evaluation in the studied area using the software of mapinfo and socio - economic statistic data 运用mapinfo软件和社会经济统计数据，以盘锦市1 ： 100000地形图和土地利用图作为底图，获得地面1km 1km范围高程值以及评估单元基础数据，并计算出在没有防护、不同潮位背景、海平面上升不同高度的条件下，辽河三角洲未来海平面上升将淹没的土地面积、受灾人口和经济损失，以及不同土地利用类型的淹没面积及相应的经济价值。
According to the result of physical modeling , the regression equation about the decrement of tidal bore height , the percentage of water - resisting area and the distance away from the upstream bridge site is constructed in this paper , the regression equation can be applied in the impact which bridge has on the tidal bore height in qiangtang esturary 根据模型试验结果，建立了涌潮高度的减小值与中潮位桥墩阻水面积百分比和上游离桥址距离的多元回归方程，可供钱塘江河口建桥对涌潮高度的影响计算参考使用。
The methods to evaluate design tidal elements when the data are incomplete or inconsistent are studied in this paper , taking the tidal reach where suzhou - nantong yangtze river bridge will be constructed for example . and the methods of how to distinguish outlier in different parameter estimation methods are studied 然后以苏通长江公路大桥桥位河段为例，重点探讨了非一致资料条件下分期设计最高潮位计算、不同的参数估计方法下如何判别特大值和不完整资料条件下感潮河段水文设计值的计算方法。
In the part sea area of the oujiang estuary which has complicated landform , the different ko are adopted in the control equations of flow and salinity process to work out the process of tide level , averaged salinity and the flow field using the invariant flow and the real process of tide level as the boundary conditions . the comparison and analysis among the computed results , the theoretic results and the computed results of two dimensional numeric model in a large area indicate that the model is applicable 以地形复杂的瓯江河口局部海区为例，分别采用给定恒定流以及实际潮流过程作为边界条件，对水流盐度过程采用不同的k _ 0形式进行了计算，给出了潮位过程、平均盐度过程以及流场的逐时计算结果，将计算结果与相应的理论结果、实测资料以及大范围二维数学模型的计算结果进行了验证及细致分析，得到了较为满意的结果。
