Automated procedure of real-time flood forecasting in Vu Gia - Thu Bon river basin, Vietnam by integrating SWAT and HEC-RAS models Academic Article uri icon

abstract

  • Abstract The precise and reliable simulation of hydrologic and hydraulic processes is important for efficient flood forecasting and warning. The study proposes a real-time flood forecasting system which integrates a coupled hydrological-hydraulic modeling system, weather station network, and stream gauges in a web-based visualization environment. An automated procedure was developed for linking dynamically terrestrial rainfall-runoff processes and river hydraulics by coupling the SWAT hydrological model and the HEC-RAS hydraulic model. The flood forecasting system was trialed in the Vu Gia Thu Bon river basin, Quang Nam province, Vietnam. The results showed good statistical correlation between predicted and measured stream flow for a 10-year calibration period (R = 0.95, NSI = 0.95, PBIAS = 1.54) and during the following 10-year validation period as well (R = 0.93, NSI = 0.93, PBIAS = 6.18). A close-up analysis of individual storm events indicated that the magnitude and timing of peak floods were accurately predicted in 2015 (R = 0.88, NSI = 0.69, PBIAS = 4.50) and 2016 (R = 0.80, NSI = 0.93, PBIAS = 6.18). In addition, the automated procedure was demonstrated to be reliable with dependable computational efficiency of less than 5 minutes' processing time.

published proceedings

  • JOURNAL OF WATER AND CLIMATE CHANGE

author list (cited authors)

  • Nguyen, K. L., Nguyen, D. L., Le, H. T., Nguyen, T. H., Cao, D. T., Vo, N., ... Jeong, J.

citation count

  • 19

complete list of authors

  • Nguyen, Kim Loi||Nguyen, Duy Liem||Le, Hoang Tu||Nguyen, Thi Hong||Cao, Duy Truong||Vo, Ngoc Quynh Tram||Tran, Thong Nhat||Tran, Ngoc Anh||Jeong, Jaehak

publication date

  • September 2019