| Title: | Simulating reservoir induced Lhasa streamflow variability using ArcSWAT |
| Authors: | Yasir, M., T. Hu and S.A. Hakeem |
| Year: | 2020 |
| Journal: | Water |
| Volume (Issue): | 12(5) |
| Pages: | |
| Article ID: | 1370 |
| DOI: | 10.3390/w12051370 |
| URL (non-DOI journals): | |
| Model: | SWAT |
| Broad Application Category: | hydrologic only |
| Primary Application Category: | reservoirs, ponds, lakes and/or other impoundment effects |
| Secondary Application Category: | hydrologic assessment |
| Watershed Description: | 32,321 km^2 Lhasa River, a tributary of the Yarlung Tsangbo River that originates in the central western Qinghai-Tibetan Plateau in the Tibet Autonomous Region in southwest China. |
| Calibration Summary: | |
| Validation Summary: | |
| General Comments: | |
| Abstract: | Lhasa River Basin being the socio-economic hotspot of Qinghai-Tibetan Plateau is
experiencing an increased hydropower capacity in the form of damming and reservoir construction.
The Pangduo hydropower station, commenced in 2013, is one of these developments. Lhasa River
discharge is analyzed for spatial variability under the reservoir operation at Pondo and Lhasa gauging
station. The Mann–Kendall Trend analysis reveals an increased precipitation and a decreased Lhasa
River discharge trend upstream and downstream the reservoir. However, the discharge received at
Lhasa gauging station is experiencing a greater decline revealed by Sen’s slope estimator. Soil and
Water Assessment Tool (SWAT) modelling of the Lhasa River discharge for both the hydrometric
stations from 2008–2016 reveals better simulation results for Pondo hydrometric station in terms of R2,
NSE and PBIAS values. The modelling results for Pondo station correspond comparatively well to the
reservoir operation procedures including water level and inflow despite of data availability constraint.
However, the importance of non-simulated processes (e.g., groundwater abstractions) to the accurate
prediction of the Lhasa flow regime particularly at the downstream flow gauge is recommended.
The study can prove beneficial for local water distribution measures in Lhasa River Basin. |
| Language: | English |
| Keywords: | SWAT; reservoir operation; simulation; Mann–Kendall trend test; Sen’s slope estimator;
Lhasa River Basin; inflow; parameter uncertainty |