虚拟环境中水文数据时空展布和三维等值线生成算法研究  

Algorithm of Temporal and Spatial Distribution and 3-D Contour Generation of Hydrological Data in Virtual Environment

作　　者：冶运涛[1,2] 王兴奎[2] 蒋云钟[1] 李丹勋[2] 李文杰[2] 

机构地区：[1]中国水利水电科学研究院水资源研究所,北京100038 [2]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《应用基础与工程科学学报》2011年第3期416-428,共13页Journal of Basic Science and Engineering

基　　金：国家自然科学基金创新研究群体基金项目(50721006);"十一五"国家重点科技支撑计划课题(2008BAB29B08);水利部公益性行业科研专项经费项目(200901031)

摘　　要：为实现海量数据的信息快速挖掘和直观表达,提出了基于数字流域仿真平台的水文数据三维可视化方法.该方法利用顾及地形特征生成的流域离散点作为数字流域仿真平台与观测数据和分布式水文模拟结果集成的基础;研究了流域水文数据时空展布和三维等值线生成算法与分区透明度和颜色值相结合增加视觉敏感性来虚拟表达水文时空信息;并引入计算机动画技术实现水文数据时空演变过程.最后将以上算法与数字流域仿真平台集成应用于长江上游降雨过程的动态三维可视化系统的构建,取得了良好效果.To realize rapid mining and virtual expression of mass hydrological data,a new method of three-dimensional（3-D）visualization based on Virtual Simulation Platform of Digital Basin（VSPDB）is proposed.This method uses a number of discrete points generated while considering the topographic form of the basin as the basis for integrating the hydrological data with VSPDB,studies the algorithm of spatial and temporal distribution and 3-D contour generation to mine the potential laws of hydrological data,puts forward a method increasing visual sensitivity by coupling transparency value with color value to visualize its spatial and temporal information,and introduces computer animation technology to simulate the spatial and temporal evolution process of hydrological data.Finally,the proposed algorithm with VSPDB was applied in the development of the 3-D visualization system for the rainfall process in the upper part of Yangtze River and achieved good results.

关 键 词：数字流域 水文数据时空展布 三维等值线生成 分区透明度 虚拟仿真 

分 类 号：TV68[水利工程—水利水电工程] TP391[自动化与计算机技术—计算机应用技术]