CALPUFF模型与WebGIS集成开发应急地理信息系统

Development of Emergency Geographic Information System by Integ rating CALPUFF Model with WebGIS

如何快速准确地模拟毒害性气体的扩散过程、评估影响范围和程度是应急地理信息系统研究的重要问题。CALPUFF模型能有效模拟粗糙、复杂三维地形条件下大气污染物在时空变化中的扩散过程,并实现秒级扩散模拟。但是现有的CALPUFF模型系统只能单机操作,与气象监测、泄露探测装置自动化对接存在困难,导致系统无法自动化、多并发计算。本文研究了CALPUFF模型计算原理和系统结构,设计模型系统与网络地理信息系统(WebGIS)集成的方案,提出基于SOA的多服务并发请求技术,并依托川东北高含硫项目开发原型系统进行实验。实验结果表明,本文设计的框架能在满足系统要求的情况下进行多并发和自动化计算,解决了CALPUFF模型无法自动化、多并发计算的缺点。

How to quickly and accurately simulate the diffusion process of toxic gases,and evaluate the scope and degree of influence are important issues in emergency geographic information system research.The CALPUFF model can effectively simulate the diffusion process of atmospheric pollutants under rough and complex three-dimensional terrain conditions,and realize second-level diffusion simulation.However,the existing CALPUFF model system can only be operated by a single machine,and there are difficulties in automated interface with weather monitoring and leak detection devices,which leads to the system's inability to automate and multiple concurrent calculations.In this paper,we study the calculation principle and system structure of CALPUFF model,design the integration scheme between the model system and Web Geographic Information System,propose a multi-service concurrent request technology based on SOA,and develop a prototype system based on the Northeast Sichuan High Sulfur Project to carry out experiments.The experimental results show that the framework designed in this paper is able to perform multiple concurrent and automated calculations while meeting the system requirements,which solves the shortcomings that the CALPUFF model cannot automate and perform multiple concurrent calculations.