| Title: | Assessment of baseflow estimates considering recession characteristics in SWAT |
| Authors: | Lee, J., J. Kim, W.S. Jang, K.J. Lim and B.A. Engel |
| Year: | 2018 |
| Journal: | Water |
| Volume (Issue): | 10(4) |
| Pages: | |
| Article ID: | 371 |
| DOI: | 10.3390/w10040371 |
| URL (non-DOI journals): | |
| Model: | SWAT |
| Broad Application Category: | hydrologic only |
| Primary Application Category: | baseflow separation techniques |
| Secondary Application Category: | baseflow, interflow and/or other hydrologic component analysis |
| Watershed Description: | 99.2 km^2 Seoul, 1567 km^2 Musim, 392 km^2 Osu, 649.8 km^2 Andong and 696 km^2 Pyeongchang Rivers, located respectively in the northeast, central, southwest, east central, and northeast parts of South Korea. |
| Calibration Summary: | |
| Validation Summary: | |
| General Comments: | |
| Abstract: | Baseflow is influenced by incoming groundwater to aquifers and is closely related
to watershed characteristics. Understanding baseflow characteristics is of great importance to
river ecosystems and water management. Baseflow estimation typically depends on the observed
streamflow in gauged watersheds, but accurate predictions of streamflow through modeling can also
be useful in estimating baseflow. However, uncertainty occurs in the baseflow estimation process
when modeling streamflow. Therefore, the purpose of this study is to compare the method that
is proposed by Arnold and Allen (Scenario I) to an improved recession prediction method where
the alpha factor (baseflow recession coefficient) is recalibrated and is applied to SWAT (Scenario II).
Although the differences between the results (NSE, R2, RMSE, MAE, d) of Scenarios I and II were small
regarding streamflow and recession, the Scenario II method more accurately reflected the recession
characteristics than the Scenario I method. Furthermore, the Scenario II method was better in baseflow
prediction than for the Scenario I method proposed by Arnold and Allen. Therefore, these outputs
pave the way and contribute to an efficient method for water management in watersheds. |
| Language: | English |
| Keywords: | alpha factor; baseflow; Bflow; streamflow recession; SWAT |