| Title |
Effect of Areal Mean Rainfall Estimation Technique and Rainfall-Runoff Models on Flood Simulation in Samcheok Osipcheon(Riv.) Basin |
| Authors |
이현지(Lee, Hyeonji) ; 신영섭(Shin, Youngsub) ; 강동호(Kang, Dongho) ; 김병식(Kim, Byungsik) |
| DOI |
https://doi.org/10.12652/Ksce.2023.43.6.0775 |
| Keywords |
면적 강우량; 강우-유출 모형; 산악지형 홍수 모의; 첨두홍수량; 첨두홍수 발생시간 Areal mean rainfall; Rainfall-Runoff model; Flood simulation in mountain basin; Peak flood; Peak flood occurrence time |
| Abstract |
In terms of flood management, it is necessary to analyze quantitative rainfall and runoff from a spatial and temporal perspective and to analyze runoff for heavy rainfall events that are concentrated within a short period of time. The simulation and analysis results of rainfall-runoff models vary depending on the type and input data. In particular, rainfall data is an important factor, so calculating areal mean rainfall is very important. In this study, the areal mean rainfall of the Samcheok Osipcheon(Riv.) watersheds located in the mountainous terrain was calculated using the Arithmetic Mean Method, Thiessen’s Weighting Method, and the Isohyetal Method, and the rainfall-runoff results were compared by applying the distributional model S-RAT and the lumped model HEC-HMS. The results of the temporal transferability study showed that the combination of the distributional model and the Isohyetal Method had the best statistical performance with MAE of 64.62 ㎥/s, RMSE of 82.47 ㎥/s, and R2 and NSE of 0.9383 and 0.8547, respectively. It is considered that this study was properly analyzed because the peak flood volume occurrence time of the observed and simulated flows is within 1 hour. Therefore, the results of this study can be used for frequency analysis in the future, which can be used to improve the accuracy of simulating peak flood volume and peak flood occurrence time in mountainous watersheds with steep slopes. |