<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>Bankfull discharge is an important criterion for flash flood warnings. In this study, the authors propose a new approach to determine the bankfull discharge for basins in Ha Giang province, Vietnam. The study combines the field survey to determine the bankfull discharge through the bankfull indicators and develop a multivariate regression equation between the bankfull discharge and the basin characteristics. The results of the study give a simple equation with 2 independent variables. They are the catchment area and the main river length. They show a strong relationship with the bankfull discharge with the R<sup>2</sup> indexes in developing and validating process equal to 95.3% and 92.7%, respectively. With this approach, the workload is significantly reduced. However, the accuracy and flexibility of the total discharge calculation are enhanced. This will be the foundation to reduce uncertainty in flash flood warnings.</p>
</abstract>

Bankfull discharge is an important criterion for flash flood warnings. In this study, the authors propose a new approach to determine the bankfull discharge for basins in Ha Giang province, Vietnam. The study combines the field survey to determine the bankfull discharge through the bankfull indicators and develop a multivariate regression equation between the bankfull discharge and the basin characteristics. The results of the study give a simple equation with 2 independent variables. They are the catchment area and the main river length. They show a strong relationship with the bankfull discharge with the R2 indexes in developing and validating process equal to 95.3% and 92.7%, respectively. With this approach, the workload is significantly reduced. However, the accuracy and flexibility of the total discharge calculation are enhanced. This will be the foundation to reduce uncertainty in flash flood warnings.

Developing the Regression Equations to Determine the Bankfull Discharge from the Basin Characteristics

Hanoi University of Natural Resources and Environment

Archives of Hydro-Engineering and Environmental Mechanics

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Bankfull discharge is an important criterion for flash flood warnings. In this study, the authors propose a new approach to determine the bankfull discharge...

Developing the Regression Equations to Determine the Bankfull Discharge from the Basin Characteristics

Published Online: Jan 18, 2022

Page range: 103 - 117

Received: May 12, 2021

Accepted: Aug 09, 2021

DOI: https://doi.org/10.2478/heem-2021-0006

Keywords
bankfull discharge, regression equation, catchment characteristics

© 2021 Tran Kim Chau et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Developing the Regression Equations to Determine the Bankfull Discharge from the Basin Characteristics

Published Online: Jan 18, 2022

Page range: 103 - 117

Received: May 12, 2021

Accepted: Aug 09, 2021

DOI: https://doi.org/10.2478/heem-2021-0006

Keywordsbankfull discharge, regression equation, catchment characteristics

© 2021 Tran Kim Chau et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
bankfull discharge, regression equation, catchment characteristics