Browse > Article
http://dx.doi.org/10.3741/JKWRA.2021.54.12.1329

Development of real-time program correcting error in radar polarimetric variables  

Yoon, Jungsoo (Flash Flood Research Center, Korea Institute of Civil Engineering and Building Technology)
Hwang, Seok-Hwan (Flash Flood Research Center, Korea Institute of Civil Engineering and Building Technology)
Kang, Narae (Flash Flood Research Center, Korea Institute of Civil Engineering and Building Technology)
Lee, Dong-Ryul (Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology)
Lee, Keon-Haeng (Water Resources Information Center, Han River Flood Control Office)
Publication Information
Journal of Korea Water Resources Association / v.54, no.12, 2021 , pp. 1329-1338 More about this Journal
Abstract
Rain radar provides high spatio-temporal radar rainfall that can be used as input data to short-term precipitation forecasting models. Korea Institute of Civil Engineering and Building Technology (KICT) has developed a flash flood forecasting system that is providing flash flood forecasting based on short-term rainfall forecasts estimated by the radar rainfall. Accuracy of the radar rainfall as well as the short-term rainfall forecasts, however, can deteriorate when radar polarimetric variables have error. In this study, we develope real-time program that can correct the error inherent in the radar polarimetric variables. First, effect according to the correction of the error was verified using 363 rainfall events on non real-time. The accuracy (1-NE) of the radar rainfall was approximately 70% and correlation coefficient was higher than 0.8 after correcting the error on non real-time. The accuracy (1-NE) using the real-time program was also approximately 70% after correcting the error.
Keywords
Rain radar; Radar polarization data; Accuracy of radar rainfall; Real-time correction;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Yoo, C., Park, C., Yoon, J., and Kim, K. (2013). "Interpretation of mean-field bias correction of radar rain rate using the concept of linear regression." Hydrological Processes, Vol. 28, pp. 5081-5092.   DOI
2 Yoon, J. (2018). "Quantification of error in reflectivity for improving the accuracy of the radar rainfall estimated from single polarization radar." Journal of the Korean Society of Hazard Mitigation, Vol. 18, No. 5, pp. 255-263.   DOI
3 Yoon, J., Choi, J., Yoo, C., and Kim, K. (2016a). "The runoff uncertainty caused by the mismatch between the radar rain rate and the topographical information data." KSCE Journal of Civil Engineering, Vol. 20, pp. 960-970.   DOI
4 Yoon, J., Suk, M-K., Nam, K-Y., and Park, J-S. (2016b). "Application of an empirical method to improve radar rainfall estimation using cross governmental dual-pol. radars." Journal of Korea Water Resources Association, Vol. 49, No. 7, pp. 625-634.   DOI
5 Kim, K., Choi, J., and Yoo, C. (2008). "Synthesis of Radar measurements and ground measurements using the Successive Correction Method (SCM)." Journal of Korea Water Resources Association, Vol. 41, No. 7, pp. 681-692.   DOI
6 Hwang, S., Yoon, J., Kang, N., and Lee, D-R. (2020). "Development of flood forecasting system on city.mountain.small river area in Korea and assessment of forecast accuracy." Journal of Korea Water Resources Association, Vol. 53, No. 3, pp. 225-236.   DOI
7 Kim, J., and Yoo, C. (2014). "Using extended Kalman Filter for realtime decision of parameters of Z-R relationship." Journal of Korea Water Resources Association, Vol. 47, No. 2, pp. 119-133.   DOI