目前的国家级渍涝风险气象预报预警业务是以VIC（Variable Infiltration Capacity）水文模型与渍涝发布标准为技术基础制作发布的。基于USGS提供的30"分辨率的DEM订正流域数字水系，基于流域物理特征建立Mukingum-Cunge汇流模型的参数自动优选方案，利用虚拟线性水库技术解决西部高海拔地区误报情况，基于ECMWF细网格预报实现未来72小时的渍涝风险气象预报预警，以提高渍涝风险气象预报预警模型精度与预见期。以2014年3月与5月珠江流域两次强降水引发渍涝为试验个例进行验证，改进的模型预报预警效果好于原业务模型。%National meteorological operation of water logging & water logged meteorological forecast and warning is based on VIC (V ariable Inifltration Capacity) hydrological model and its release criteria. In this study, digital watershed is corrected with high resolution DEM data of USGS, Mukingum-Cunge routing model automatic parameters optimization is based on watershed physical characteristic linear reservoir method, and virtual linear reservoir method is used to correct the false alarm cases in high altitude of China West. In order to increase alarm lead time, the high resolution 72 hours forecasts of ECMWF are applied for water logging & water logged meteorological forecast and warning operational service. Taking the water logging & water logged event of the Pearl River in Mar.28 to 31, 2014 as the test case, the result shows the improved model performs better than the original model.
展开▼
