| Title |
An Evaluation of River Discharge Estimates in a Junction with Backwater effect using Interpolated Hydraulic Performance Graph |
| Authors |
김지성(Kim, Ji-Sung) ; 김원(Kim, Won) |
| DOI |
https://doi.org/10.12652/Ksce.2018.38.6.0831 |
| Keywords |
배수영향;합류부;수위-유량관계;자동유량측정 Backwater;Junction;Stage-discharge relationship;Automatic discharge measurement;HPG |
| Abstract |
This paper presents a method to estimate the flow discharge in a backwater affected river junction. First, unsteady HEC-RAS model was simulated and calibrated using 2 recent real flood and then HPG (Hydraulic Performance Graph) was created by plotting the relationship between upstream and downstream stages and discharge in the reach and performing kriging interpolation. During a flood, the discharge through the reach can be estimated based on the stages at its ends and the developed HPG. These discharge data were in good agreement with the automatic discharge measurements such as ADVM. This study could provide an economical and practical method for estimating discharge in a junction with a high hysteresis of stage-discharge relationships. |