摘要
风场是影响林火蔓延行为最关键的因素之一。许多林火发生在地形复杂多变的山区,会产生复杂的局部风场。为探究动态风场对林火蔓延预测的影响,以“3·30”西昌泸山森林火灾为研究对象,利用WRF(weather research and forecasting)模式模拟动态风场,并与林火蔓延模型耦合。分别将模拟风场和均一风场分别输入林火蔓延模型,基于林火蔓延过程中实际火场范围数据,分析动态风场对林火蔓延模型预测结果的影响。结果表明,耦合WRF模式和林火蔓延模型考虑了分辨率更高、且更为准确的局部风场,能够实现对森林火灾蔓延的动态模拟。预测得到的火场范围和均一风场相比,与实际范围具有更高的相似度。
Wind field is considered as one of the most environmental factors affecting the spread of forest fire.Many forest fires occur in mountainous areas with complex and changeable terrain,which produces complicated local wind patterns.In order to explore the impact of dynamic behavior of the wind on the fire propagation,the WRF(weather research and forecasting)model was used to simulate the dynamic wind field and coupled with the forest fire spread model,taking the“3·30”Xichang Lushan forest fire as the research object.The simulated wind field and the uniform wind field were respectively input into the forest fire spread model.The influence of dynamic wind field on the prediction results of forest fire spread model was analyzed based on the data of the actual fire field range during the forest fire spread process.The results show that the coupled WRF model and the forest fire spread model consider the local wind field with higher resolution and accuracy,and can realize the dynamic simulation of forest fire spread.The predicted fire range is more similar to the actual range than the uniform wind field.
作者
李春梅
孟庆祥
崔卫红
LI Chun-mei;MENG Qing-xiang;CUI Wei-hong(China School of Remote Sensing and Information Engineering,Wuhan University,Wuhan 430079,China)
出处
《科学技术与工程》
北大核心
2023年第11期4579-4585,共7页
Science Technology and Engineering
基金
深圳市学科布局项目(JCYJ20180508152055235)。
关键词
复杂地形
动态风场模拟
林火蔓延
WRF模式
complex terrain
dynamic wind field simulation
forest fire spread
WRF model
