潮汐影响下的岛礁海陆交互淹没模型  

Inundation model of interaction between sea and land at islands and reefs under tidal influence

作　　者：刘立坤[1] 鲁仲缘 许菁 

机构地区：[1]武汉大学 测绘遥感信息工程国家重点实验室,湖北武汉430079 [2]武大吉奥信息技术有限公司,湖北武汉430223

出　　处：《辽宁工程技术大学学报（自然科学版）》2013年第12期1681-1685,共5页Journal of Liaoning Technical University (Natural Science)

基　　金：国家重点基础研究发展计划(973计划)基金资助项目(2010CB731800);国家高技术研究发展计划(863计划)基金重点资助项目(2009AA121404);国家自然科学基金资助项目(61172174);武汉大学博士研究生自主科研基金资助项目(20106190201000158)

摘　　要：为准确模拟近海岛礁复杂地理环境的淹没情况,采用建立洼地索引和分析洼地间水流方向的方法,进行基于多水位的海岛礁淹没范围动态模拟.并综合海陆判断算法,减少海陆交互中出现的错误和失真.研究结果表明:建立洼地索引的方法能够弥补传统淹没模型的不足,具有更加迅速的计算收敛性和准确的淹没计算结果.应用到真实潮汐影响下的海岛礁淹没建模过程中时,计算结果在数字地球软件GeoGlobe中的效果更加符合真实情况,能够精细地模拟海岛礁淹没的过程,具有一定的普遍应用价值.For simulating inundation process more accurately oriented for complex environment at offshore islands and reefs, a depression index and direction analysis of water flow between depressions were established to model the inundation process under real tidal influence based on multi-water-level schema. It combines with the determining algorithm between sea and land which can eliminate errors and distortions in the interaction. The test result reveals that the depression-index-based method can outshine with the traditional inundation model, and it has more fast convergence rate and more accurate computation result. Applying the method into the inundation process at sea and islands under real tidal influence is showcased in the digital globe software GeoGlobe convincingly reflecting the whole process of sea water inundation at islands and reefs. The method is of certain significance to general applications.

关 键 词：海岛礁 虚拟地理环境 海陆交互 淹没模型 洼地索引 潮汐 多水位 数字地球 

分 类 号：P731.2[天文地球—海洋科学]