RADAR EXTRAPOLATION IN VERY SHORT-RANGE RAINFALL FORECASTING IN HO CHI MINH CITY

Tóm tắt

This article presents the study results of TITAN and SWIRLS tools for extrapolating radar data to forecast rainfall (1 - 6 hours) in Ho Chi Minh City region. The SWIRLS and TITAN are optional tools to extrapolate radar data. The validation results implemented by comparing with GSMAP data (gridded rainfall data) and observation measured at 219 stations at Southern Viet Nam (SVN). The study results show that TITAN and SWIRLS tools can forecast well the place n, direction and speed of rain as well as place of thunderstorm. Especially, the error index calculations showed the better results in SWIRLS than TITAN. However, the better moving trend forecast in the case of Typhoon Usagi is found by TITAN than by SWIRLS.