防汛多尺度预演可视化技术研究与应用

Research and application of multi-scale flood control rehearsal visualization technology

针对当前防汛预演中存在的场景加载慢、表达不直观等问题,研究并实现防汛多尺度预演可视化技术。由于洪水防御需要考虑洪水量级、影响范围、保护对象等众多因素,将预演按照空间分为流域宏观、河段中观、城镇/水工程3个尺度;基于GPUShader、粒子系统、BIM、缓存加载等技术,研究实现不同尺度下的洪水传播、淹没模拟、工程调度等业务场景的预演可视化呈现和场景快速加载技术;以流域一张图为数据支撑,结合预报、调度、淹没等模型的计算结果,构建流域宏观、河段中观、城镇/水工程等多尺度的可视化预演场景,实现洪水流量过程、水工程调度、洪水淹没等的快速直观及动态仿真模拟。防汛多尺度预演可视化技术在珠江水旱灾害防御“四预”平台的应用表明:该技术可改善不同尺度下的防汛预演效果,提高预演效率,为流域防汛调度会商决策提供强力支撑。

In view of the problems of slow scene loading and unintuitive expression in current flood control rehearsal,the visualization technology of multi-scale flood control rehearsal is studied and implemented.Since there are many factors to be considered in flood control such as flood magnitude,impact scope,protection objects,etc.,the rehearsal is divided into three scales according to space,which are river basin,river section,and the urban/water project.Based on GPU Shader,particle system,BIM,cache loading and other technologies,the rehearsal visualization and rapid loading technology is studied and implemented,which can be applied in flood propagation,inundation simulation,engineering scheduling and other business scenarios at different scales.Based on the data support of the river basin map,combined with the calculation results of prediction,scheduling and flooding,a multi-scale visual rehearsal is constructed with scenarios of river basin,river section,urban/water project,etc.Thus,the flood flow process,water project scheduling,flood inundation,etc.can be simulated in a rapid,intuitive,and dynamic way.The multi-scale flood control rehearsal visualization technology is applied in"four-pre"platform of flood and drought disaster prevention in Pearl River,which shows that it can improve rehearsal effect at different scales,enhance rehearsal eficiency,and provide strong support for flood control scheduling consultation and decision-making in the basin.