The influence of carbonate precipitation on riverine magnesium isotope signals: New constrains from Jinsha River Basin, Southeast Tibetan Plateau

Quantifying the impacts of climate changes and human activities on runoff has received extensive attention, especially for the regions with significant elevation difference. The contributions of climate changes and human activities to runoff were analyzed using rainfall-runoff relationship, double mass curve, slope variation, and water balance method during 1961–2010 at the Jinsha River basin, China. Results indicate that runoff at upstream and runoff at midstream are both dominated by climate changes, and the contributions of climate changes to runoff are 63%~72% and 53%~68%, respectively. At downstream, climate changes account for only 13%~18%, and runoff is mainly controlled by human activities, contributing 82%~87%. The availability and stability of results were compared and analyzed in the four methods. Results in slope variation, double mass curve, and water balance method except rainfall-runoff relationship method are of good agreement. And the rainfall-runoff relationship, double mass curve, and slope variation method are all of great stability. The four methods and availability evaluation of them could provide a reference to quantification in the contributions of climate changes and human activities to runoff at similar basins in the future.

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Analysis of fishways in the Middle and Lower Jinsha River Basin (China)

10.5194/egusphere-egu21-15963 ◽

2021 ◽

Author(s):

Siqi Tong ◽

Silke Wieprecht ◽

Martin Schletterer

Keyword(s):

River Basin ◽

Jinsha River ◽

Vertical Slot ◽

Upper Yangtze River ◽

Artificial Breeding ◽

Longitudinal Connectivity ◽

Target Fish ◽

Regional Sustainable Development ◽

Vertical Slot Fishway ◽

Hydropower Stations

This study was carried out in the middle and lower reaches of the Jinsha River in southwest China, which represents the upper Yangtze River. Hydraulic structures (14 cascade hydropower stations) are planned and/or constructed in this system, which is considered as largest hydropower base. We aim to summarize appropriate measures to restore the riverine continuum in the middle and lower reaches of the Jinsha River, where high-head cascade hydropower dams are located or planned.We distributed a questionnaire to Chinese researchers in the related fields (scientists, hydropower operators and NGOs in China, n = 60). According to the responses, fishways, fish lift, fish lock, trap-and-truck system as well as fish hatcheries (artificial breeding) are recognized to ensure passing respectively preserving fish in the Jinsha River basin.A longitudinal connectivity assessment of the study area revealed a severely disturbed continuity status. Based on the biological analyses of the demands of the target fish species and review of fish pass technologies, a vertical-slot fishway is proposed.Considering the dam heights and the geographical conditions, it is recommended to combine the vertical-slot fishway with these alternatives to achieve a higher efficiency in passing fish as well as to recover the river continuity towards regional sustainable development.

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Tree-ring evidence of recent abnormal warming on the southeast Tibetan Plateau

Theoretical and Applied Climatology ◽

10.1007/s00704-008-0085-6 ◽

2009 ◽

Vol 98 (1-2) ◽

pp. 9-18 ◽

Cited By ~ 131

Author(s):

E. Y. Liang ◽

X. M. Shao ◽

Y. Xu

Keyword(s):

Tibetan Plateau ◽

Tree Ring ◽

Southeast Tibetan Plateau

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Evaluating the streamflow simulation capability of PERSIANN-CDR daily rainfall products in two river basins on the Tibetan Plateau

10.5194/hess-2016-282 ◽

2016 ◽

Cited By ~ 3

Author(s):

Xiaomang Liu ◽

Tiantian Yang ◽

Koulin Hsu ◽

Changming Liu ◽

Soroosh Sorooshian

Keyword(s):

Tibetan Plateau ◽

River Basin ◽

Yangtze River ◽

Yellow River ◽

Yangtze River Basin ◽

Information Source ◽

Hydrologic Model ◽

The Tibetan Plateau ◽

Climate Data ◽

Streamflow Simulation

Abstract. On the Tibetan Plateau, the limited ground-based rainfall information owing to a harsh environment has brought great challenges to hydrological studies. Satellite-based rainfall products, which allow a better coverage than both radar network and rain gauges on the Tibetan Plateau, can be suitable observation alternatives for investigating the hydrological processes and climate change. In this study, a newly developed daily satellite-based precipitation product, termed Precipitation Estimation from Remotely Sensed Information Using Artificial Neural Networks–Climate Data Record (PERSIANN-CDR), is used as input of a hydrologic model to simulate streamflow in the upper Yellow and Yangtze River Basin on the Tibetan Plateau. The results show that the simulated streamflow using PERSIANN-CDR precipitation is closer to observation than that using limited gauge-based precipitation interpolation in the upper Yangtze River Basin. The simulated streamflow using gauge-based precipitation are higher than the streamflow observation during the wet season. In the upper Yellow River Basin, PERSIANN-CDR precipitation and gauge-based precipitation have similar good performance in simulating streamflow. The evaluation of streamflow simulation capability in this study partly indicates that PERSIANN-CDR rainfall product has good potentials to be a reliable dataset and an alternative information source besides the sparse gauge network for conducting long term hydrological and climate studies on the Tibetan Plateau.

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