| Title: | Optimization and application of snow melting modules in SWAT model for the alpine regions of northern China |
| Authors: | Liu, Y., G. Cui and H. Li |
| Year: | 2020 |
| Journal: | Water |
| Volume (Issue): | 12(3) |
| Pages: | |
| Article ID: | 636 |
| DOI: | 10.3390/w12030636 |
| URL (non-DOI journals): | |
| Model: | SWAT (modified) |
| Broad Application Category: | hydrologic only |
| Primary Application Category: | snowmelt, frozen soil and/or glacier melt processes |
| Secondary Application Category: | model and/or data comparison |
| Watershed Description: | 16,304 km^2 Hulan River, a tributary of the Songhua River located in the central part of Heilongjiang Province in northeast china. |
| Calibration Summary: | |
| Validation Summary: | |
| General Comments: | |
| Abstract: | Snowmelt is the main source of runoff in the alpine regions of northern China. When using the soil and water assessment tool (SWAT) to simulate snowmelt runoff, the snowmelt date and snowmelt factor parameters are set according to the North American values. To improve the accuracy of the runoff simulation in northern China, we innovatively used a baseflow segmentation method to determine the snowmelt time, taking temperature as a reference. The snowmelt period was extracted from statistical data, and the corresponding parameters in the source code of SWAT were optimized for the study area. After the calibration was completed, the modified simulation value was compared with the original code simulation value. The simulation accuracy of the daily runoff was improved, and we found that the greater the difference between the source code simulation value and the observed value was, the better the simulation accuracy. Therefore, modifying the source code in SWAT is an effective way to improve the accuracy of simulations of Alpine regions in Northern China. The results show that adjustments to the snowmelt modules of SWAT to reflect local conditions can be an effective way to improve the predictions. |
| Language: | English |
| Keywords: | SWAT; baseflow segmentation; spring snowmelt; code modification; Hulan river |