| Title: | SWAT-simulated streamflow responses to climate variability and human activities in the Miyun Reservoir Basin by considering streamflow components |
| Authors: | Yan, T., J. Bai, A.L.Z. Yi and Z. Shen |
| Year: | 2018 |
| Journal: | Sustainability |
| Volume (Issue): | 10(4) |
| Pages: | |
| Article ID: | 941 |
| DOI: | 10.3390/su10040941 |
| URL (non-DOI journals): | |
| Model: | SWAT |
| Broad Application Category: | hydrologic only |
| Primary Application Category: | climate change and human activities change |
| Secondary Application Category: | baseflow, interflow and/or other hydrologic component analysis |
| Watershed Description: | 15,350 km^2 Miyun Reservoir drainage area, which drains portions of four counties in Hebei Province, is a tributary of the Haihe River and is located in northeast China. |
| Calibration Summary: | |
| Validation Summary: | |
| General Comments: | |
| Abstract: | The streamflow into Miyun Reservoir, the only surface drinking water source for Beijing
City, has declined dramatically over the past five decades. Thus, the impacts of climate variability and
human activities (direct and indirect human activities) on streamflow and its components (baseflow
and quickflow) needs to be quantitatively estimated for the sustainability of regional water resources
management. Based on a heuristic segmentation algorithm, the chosen study period (1969–2012) was
segmented into three subseries: a baseline period (1969–1979) and two impact periods I (1980–1998)
and II (1999–2012). The Soil and Water Assessment Tool (SWAT) was adopted to investigate the
attributions for streamflow change. Our results indicated that the baseflow accounted for almost
63.5% of the annual streamflow based on baseflow separation. The contributions of climate variability
and human activities to streamflow decrease varied with different stages. During impact period I,
human activities was accountable for 54.3% of the streamflow decrease. In impact period II, climate
variability was responsible for 64.9%, and about 8.3 mm of baseflow was extracted from the stream
on average based on the comparison of the observed streamflow and simulated baseflow. The results
in this study could provide necessary information for water resources management in the watershed. |
| Language: | English |
| Keywords: | climate variability; human activities; baseflow separation; Miyun Reservoir basin;
hydrological modeling; streamflow components |