Your search found 2 records
1 Bharati, Luna; Gamage, Nilantha. 2010. Application of the Pitman Model to generate discharges for the Lhasa Basin, China. Hydro Nepal: Journal of Water, Energy and Environment, 7:30-34.
River basin management ; Rainfall-runoff relationships ; Simulation models ; Hydrology ; Stream flow / China / Tibet / Nepal / Lhasa River Basin / Koshi River Basin
(Location: IWMI HQ Record No: H043101)
http://www.nepjol.info/index.php/HN/article/download/4233/3593
https://vlibrary.iwmi.org/pdf/H043101.pdf
https://vlibrary.iwmi.org/pdf/H043101.pdf
(4.49 MB) (609KB)
Predicting river flows in basins where limited data is available is a challenge facing many hydrologists especially in developing countries. In this study, the Pitman monthly model was applied to generate flows for the Lhasa Basin in China (Tibet). As flow data was unavailable for the Lhasa basin, the model was first calibrated for the upper Koshi Basin in Nepal and China. The Pitman model successfully predicted flows for the upper Koshi basin (R2=0.88). Therefore, the estimated model parameters from the Koshi basin as well as climate data from the Lhasa basin were used to generate flows for the Lhasa basin outlet. The main modeling assumption is that the basin characteristics of the upper Koshi are similar to that of the Lhasa basin. Under present circumstances, where measured data is unavailable, the model estimated monthly flows for the Lhasa basin can be used in further studies in basin water accounting and management.
2 Wang, L.; Zhang, F.; Nepal, Santosh; Xiang, Y.; Tang, H.; Shi, X.; Zeng, C.; Ahmad, I.; Yu, Z. 2023. Response of runoff processes to temperature rise in basins with different glacier ratios in the monsoon-influenced southern Tibetan Plateau. Journal of Hydrology: Regional Studies, 45:101299. [doi: https://doi.org/10.1016/j.ejrh.2022.101299]
River basins ; Runoff ; Temperature ; Glaciers ; Monsoons ; Forecasting / Asia / Tibetan Plateau / Karuxung River Basin / Dudh Koshi River Basin / Arun River Basin / Gandaki River Basin / Lhasa River Basin
(Location: IWMI HQ Call no: e-copy only Record No: H051663)
https://www.sciencedirect.com/science/article/pii/S2214581822003123/pdfft?md5=aad81fb593686cfca687574039f2915b&pid=1-s2.0-S2214581822003123-main.pdf
https://vlibrary.iwmi.org/pdf/H051663.pdf
https://vlibrary.iwmi.org/pdf/H051663.pdf
(9.56 MB) (9.56 MB)
Study region: River basins with glacier ratios ranging from 1.8% to 20.7% in the monsoon-influenced southern Tibetan Plateau.
Study focus: The response of runoff processes in basins with different glacier ratios under global warming of 1.5 C and 2 C was explored based on SPHY (Spatial Processes in Hydrology) model and GCMs (General Circulation Models).
New hydrological insights for the region: More prominent temperature and precipitation changes were observed in the monsoon-influenced southern Tibetan Plateau compared with the global averages. With increasing temperature and precipitation, the total runoff and glacier runoff of these basins showed increasing trends under global warming of 1.5 C and 2 C. Compared with the baseline period (1985–2014), increases were observed in the total runoff (1.7–20.6%), base flow (2.8–8.3%), glacier runoff (8.1–35.9%), and rainfall runoff (6.0–36.0%) of these basins. In contrast, snowmelt runoff decreased (- 28.3% - - 4.3%). Therefore, relevant management and allocation of water resources may be required. The hydrological regulation function of glaciers was found to be strongly correlated with glacier ratio. In general, the hydrological regulation function of glaciers would decrease in the future along with warming induced glacier retreat. These findings would help deepen the understanding of runoff processes on the Tibetan Plateau and other alpine regions, thus providing a scientific basis for water resources management under climate change.
Study focus: The response of runoff processes in basins with different glacier ratios under global warming of 1.5 C and 2 C was explored based on SPHY (Spatial Processes in Hydrology) model and GCMs (General Circulation Models).
New hydrological insights for the region: More prominent temperature and precipitation changes were observed in the monsoon-influenced southern Tibetan Plateau compared with the global averages. With increasing temperature and precipitation, the total runoff and glacier runoff of these basins showed increasing trends under global warming of 1.5 C and 2 C. Compared with the baseline period (1985–2014), increases were observed in the total runoff (1.7–20.6%), base flow (2.8–8.3%), glacier runoff (8.1–35.9%), and rainfall runoff (6.0–36.0%) of these basins. In contrast, snowmelt runoff decreased (- 28.3% - - 4.3%). Therefore, relevant management and allocation of water resources may be required. The hydrological regulation function of glaciers was found to be strongly correlated with glacier ratio. In general, the hydrological regulation function of glaciers would decrease in the future along with warming induced glacier retreat. These findings would help deepen the understanding of runoff processes on the Tibetan Plateau and other alpine regions, thus providing a scientific basis for water resources management under climate change.
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