Nghiên cứu cải tiến phương pháp cảnh báo sét theo tổ hợp đa nguồn số liệu, áp dụng cho một số khu vực tại tỉnh Quảng Nam

This article presents research on improving lightning warning methods based on a combination of multiple data sources in some areas in Quang Nam province, collected during the period from 2015 to 2017.Lightning warning method based on electric field data, cloud image data, and lightning location data for an 8 km radius area around the station in Hoi An, Hiep Duc, Dai Loc, determining the electric field threshold for lightning warning optimized through two indexes, EFAI and EFDI, according to statistical indexes POD, FAR, and CSI.The lightning warning method is based on lightning warning device data, cloud image data, and lightning location data for the Tam Ky area.Research results show that, with independent data sources, applying lightning warnings to some areas in Quang Nam (Hoi An, Hiep Duc, and Dai Loc) determined that the average lightning warning time is 22.45 minutes, and the probability of detection is 82.56%.Testing lightning warnings based on Strike Guard device data, satellite data, and lightning location data in Tam Ky determined the average lightning warning time to be 18.0 minutes.The results show that it is possible to use the developed lightning warning methods for research areas serving socio-economic and tourism development in Quang Nam province.