scholarly journals Simulating Reservoir Induced Lhasa Streamflow Variability Using ArcSWAT

Water ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1370
Author(s):  
Muhammad Yasir ◽  
Tiesong Hu ◽  
Samreen Abdul Hakeem
Keyword(s):  
River Basin ◽  
Reservoir Operation ◽  
River Discharge ◽  
Water Distribution ◽  
Assessment Tool ◽  
Data Availability ◽  
Lhasa River Basin ◽  
Lhasa River ◽  
Downstream Flow ◽  
Gauging Station

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.

Alpine wetlands in the Lhasa River Basin, China

2010 ◽  
Vol 20 (3) ◽  
pp. 375-388 ◽  
Author(s):  
Yili Zhang ◽  
Chunlian Wang ◽  
Wanqi Bai ◽  
Zhaofeng Wang ◽  
Yanli Tu ◽  
...  
Keyword(s):  
River Basin ◽  
Lhasa River Basin ◽  
Lhasa River

Hydrochemical and isotopic characteristics of surface water in the Lhasa River basin

2019 ◽  
Vol 12 (16) ◽  
Author(s):  
Jiutan Liu ◽  
Zongjun Gao ◽  
Min Wang ◽  
Yingzhi Li ◽  
Chen Yu ◽  
...  
Keyword(s):  
Surface Water ◽  
River Basin ◽  
Lhasa River Basin ◽  
Lhasa River

Ion chemistry of groundwater and the possible controls within Lhasa River Basin, SW Tibetan Plateau

2018 ◽  
Vol 11 (17) ◽  
Author(s):  
Tao Zhang ◽  
Wutian Cai ◽  
Yingzhi Li ◽  
Tingting Geng ◽  
Zhiyin Zhang ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
River Basin ◽  
Ion Chemistry ◽  
Lhasa River Basin ◽  
Lhasa River

scholarly journals Identification of the Roles of Climate Factors, Engineering Construction, and Agricultural Practices in Vegetation Dynamics in the Lhasa River Basin, Tibetan Plateau

2020 ◽  
Vol 12 (11) ◽  
pp. 1883 ◽  
Author(s):  
Dan Li ◽  
Hongying Luo ◽  
Tiesong Hu ◽  
Dongguo Shao ◽  
Yuanlai Cui ◽  
...  
Keyword(s):  
River Basin ◽  
Vegetation Dynamics ◽  
Anthropogenic Activities ◽  
Adverse Impact ◽  
Favorable Effect ◽  
Growth Trend ◽  
Vegetation Growth ◽  
Lhasa River Basin ◽  
Reservoir Construction ◽  
Lhasa River

Understanding vegetation dynamics is necessary to address potential ecological threats and develop sustainable ecosystem management at high altitudes. In this study, we revealed the spatiotemporal characteristics of vegetation growth in the Lhasa River Basin using net primary productivity (NPP) and normalized difference vegetation index (NDVI) during the period of 2000–2005. The roles of climatic factors and specific anthropogenic activities in vegetation dynamics were also identified, including positive or negative effects and the degree of impact. The results indicated that the interannual series of NPP and NDVI in the whole basin both had a continuous increasing trend from 102 to 128 gC m−2 yr−1 and from 0.417 to 0.489 (p < 0.05), respectively. The strongest advanced trends (>2 gC m−2 yr−1 or >0.005 yr−1) were detected in mainly the southeastern and northeastern regions. Vegetation dynamics were not detected in 10% of the basin. Only 20% of vegetation dynamics were driven by climatic conditions, and precipitation was the controlling climatic factor determining vegetation growth. Accordingly, anthropogenic activities made a great difference in vegetation coverage, accounting for about 70%. The construction of urbanization and reservoir led to vegetation degradation, but the farmland practices contributed the vegetation growth. Reservoir construction had an adverse impact on vegetation within 6 km of the river, and the direct damage to vegetation was within 1 km. The impacts of urbanization were more serious than that of reservoir construction. Urban sprawl had an adverse impact on vegetation within a 6 km distance from the surrounding river and resulted in the degradation of vegetation, especially within a 3 km range. Intensive fertilization and guaranteed irrigation improved the cropland ecosystem conditions, creating a favorable effect on the accumulation of crop organic matter in a range of 5 km, with an NPP trend value of 1.2 gC m−2 yr−1. The highly intensive grazing activity forced ecological environmental pressures such that the correlation between livestock numbers and vegetation growth trend was significantly linear negative.

scholarly journals Evaluation of Water Quality in Ialomita River Basin in Relationship with Land Cover Patterns

Water ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 735 ◽  
Author(s):  
Daniel Dunea ◽  
Petre Bretcan ◽  
Danut Tanislav ◽  
Gheorghe Serban ◽  
Razvan Teodorescu ◽  
...  
Keyword(s):  
Water Quality ◽  
Land Cover ◽  
River Basin ◽  
River Discharge ◽  
Assessment Tool ◽  
Land Use Land Cover ◽  
Site Monitoring ◽  
State Of Water ◽  
Control Section ◽  
Gis Environment

The paper reviews the state of water quality in Ialomita River Basin (IRB), Romania, between 2007 and 2018 using the land use/land cover and basin-specific conditions effects on sediments and nutrients load. On-site monitoring was performed in two control sections of the Ialomita River, one in the upper part of the basin (near Targoviste city) and the second near the discharge into the Danube (downstream of Tandarei town). The statistical averages of water parameters for 10 years’ monitoring in the control section that is close to the Ialomita River discharge in Danube were pH = 7.60 (range: 6.41–8.40), NH4-N = 1.20 mg/L (0.02–14.87), alkalinity = 4.12 mmol/L (1.34–6.27), NO3-N = 2.60 mg/L (0.08–17.30), PO4-P = 0.09 mg/L (0–0,31), dissolved oxygen (DO) = 8.87 mg/L (2.72–15.96), BOD5 = 5.50 mg/L (0.01–74.71), suspended solids (TSS) = 508.32 mg/L (15.2–4457), total dissolved salts (TDS) = 733.69 mg/L (455.2–1053), and river discharge = 38.60 m3/s (8.22–165). Expected mean concentration and soil and water assessment tool (SWAT) modeling have been employed in the GIS environment to extend the approach to large spatial patterns within the basin. The estimated average specific emission on the total area for nitrogen was 3.2 kg N/ha, and 0.3 kg P/ha for phosphorus highly influenced by the agricultural activities. The results are useful to raise awareness regarding water-quality degradation and the need to stop and even reverse such trends for local and national sustainable development.

scholarly journals Study on Integrated Planning and Management in Lhasa River Basin

2020 ◽  
Vol 165 ◽  
pp. 03055
Author(s):  
Su Huidong ◽  
Liu Yin ◽  
Lu Huiting ◽  
Wang Dongbo ◽  
Jin Tianian
Keyword(s):  
River Basin ◽  
Water Cycle ◽  
Water Environment ◽  
Integrated Planning ◽  
Comprehensive Planning ◽  
Planning And Management ◽  
Tibet Autonomous Region ◽  
Lhasa River Basin ◽  
Lhasa River ◽  
Political Economic

As a political, economic and cultural center of the Tibet Autonomous Region, the Lhasa River needs to take planning and management of the basin. In the past 60 years, the temperature of Lhasa River Basin has been increasing gradually at an annual rate of 0.047 ° C, which leads to the water cycle variation of the river basin and its associated aquatic ecology and environment continue to change and evolve, and ecological environmental protection is affected by more uncertain factors. Based on the assessment of the ecological environment of the Lhasa River Basin, the comprehensive planning suggestions for the Lhasa River Basin were proposed from the aspects of water environment, land use, ecological pattern, and economic and social development. These suggestions are drawn on the examples of integrated planning and management of catchment in foreign countries and are referred to as the comprehensive planning of the seven major river basins in China.

Quantitative classification and ordination of grassland communities on the Lhasa River Basin

2019 ◽  
Vol 39 (3) ◽  
Author(s):  
包小婷 BAO Xiaoting ◽  
丁陆彬 DING Lubin ◽  
姚帅臣 YAO Shuaichen ◽  
王景升 WANG Jingsheng ◽  
石培礼 SHI Peili ◽  
...  
Keyword(s):  
River Basin ◽  
Quantitative Classification ◽  
Lhasa River Basin ◽  
Grassland Communities ◽  
Lhasa River
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