| Title |
Evaluation of the Possibility of Daily Flow Data Generation from 8-Day Interval Measured Flow Data using SWAT-CUP |
| Authors |
정재운 ( Jae Woon Jung ) ; 조소현 ( So Hyun Cho ) ; 임병진 ( Byung Jin Lim ) ; 오태윤 ( Tae Youn Oh ) ; 함상인 ( Sang In Ham ) ; 김갑순 ( Kap Soon Kim ) |
| Keywords |
Daily flow data; SWAT; SWAT-CUP; SUFI-2; 8-day interval flow data |
| Abstract |
This study is to assess the application of SWAT-CUP (Soil and Water Assessment Tool-Calibration Uncertainty Programs) and to extend daily flow data from 8-day interval flow data which has been measured by Korean Ministry of Environment (MOE). Model sensitivity analysis and calibration were performed with sequential uncertainty fitting (SUIF-2), which is one of the programs interfaced with SWAT, in the package SWAT-CUP. The most sensitive parameters were SOL-Ksol, CH_N2.rte, CN2.mgt, SOL-BD sol, ALPHA-BF gw, ALPHA-BNK rte, SOL-AWC sol, CH_K2.rte, SFTMP bsn, GW-DELAY gw. Following the sensitivity analysis, SWAT-CUP calibration was carried out using 8-day interval flow data from January 2008 to December 2010. The results were then assessed based on the visual agreement and simulated flow plots and the performance statistics generated R2 and NSE which are 0.71 and 0.61 respectively. Results of these statistics indicated that there was a good agreement between the observed and simulated flow. To extend daily flow data from 8-day interval flow data, parameters, which were estimated by SWAT-CUP, re-entered for SWAT model. As a result, the observed flow data were found to reflect the trend of simulated flow data. From these results, it is thought that this method could be used to provide daily flow data using 8-day interval flow data. |