Atmospheric Water Demand Dominates Daily Variations in Water Use Efficiency in Alpine Meadows, Northeastern Tibetan Plateau

2019 ◽  
Vol 124 (7) ◽  
pp. 2174-2185 ◽  
Author(s):  
Xiuchen Wu ◽  
Xiaoyan Li ◽  
Yunhao Chen ◽  
Yan Bai ◽  
Yaqin Tong ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Water Use Efficiency ◽  
Water Use ◽  
Water Demand ◽  
Atmospheric Water ◽  
Alpine Meadows ◽  
Daily Variations ◽  
Northeastern Tibetan Plateau ◽  
Use Efficiency

Exploring Northwest China's agricultural water-saving strategy: analysis of water use efficiency based on an SE-DEA model conducted in Xi'an, Shaanxi Province

2016 ◽  
Vol 74 (5) ◽  
pp. 1106-1115 ◽  
Author(s):  
L. Mu ◽  
L. Fang ◽  
H. Wang ◽  
L. Chen ◽  
Y. Yang ◽  
...  
Keyword(s):  
Water Resources ◽  
Water Use Efficiency ◽  
Water Use ◽  
Water Demand ◽  
Water Governance ◽  
Northwest China ◽  
Water Saving ◽  
Shaanxi Province ◽  
Agricultural Water ◽  
Use Efficiency

Worldwide, water scarcity threatens delivery of water to urban centers. Increasing water use efficiency (WUE) is often recommended to reduce water demand, especially in water-scarce areas. In this paper, agricultural water use efficiency (AWUE) is examined using the super-efficient data envelopment analysis (DEA) approach in Xi'an in Northwest China at a temporal and spatial level. The grey systems analysis technique was then adopted to identify the factors that influenced the efficiency differentials under the shortage of water resources. From the perspective of temporal scales, the AWUE increased year by year during 2004–2012, and the highest (2.05) was obtained in 2009. Additionally, the AWUE was the best in the urban area at the spatial scale. Moreover, the key influencing factors of the AWUE are the financial situations and agricultural water-saving technology. Finally, we identified several knowledge gaps and proposed water-saving strategies for increasing AWUE and reducing its water demand by: (1) improving irrigation practices (timing and amounts) based on compatible water-saving techniques; (2) maximizing regional WUE by managing water resources and allocation at regional scales as well as enhancing coordination among Chinese water governance institutes.

Spatiotemporal Variability and Driving Factors of Tibetan Plateau Water Use Efficiency

2020 ◽  
Vol 125 (22) ◽  
Author(s):  
Shan Lin ◽  
Genxu Wang ◽  
Zhaoyong Hu ◽  
Kewei Huang ◽  
Juying Sun ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Water Use Efficiency ◽  
Water Use ◽  
Driving Factors ◽  
Spatiotemporal Variability ◽  
Use Efficiency

scholarly journals Water Use Inequality and Efficiency Assessments in the Yangtze River Economic Delta of China

Water ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1709
Author(s):  
Pius Babuna ◽  
Xiaohua Yang ◽  
Dehui Bian
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Water Demand ◽  
Yangtze River ◽  
Specific Situation ◽  
The Yangtze River ◽  
Spatial Spread ◽  
Use Efficiency ◽  
Rapid Industrialization ◽  
Industrial Water Demand

The Yangtze River Economic Delta (YRED) faces inequality in water use in large proportions due to rapid industrialization. This study adopted the Gini coefficient and Global Moran’s index to calculate inequality, its spatial spread and water use efficiency of cities in the YRED and categorized them into types based on the spatial spread of inequality. In general, inequality is reducing, but water use efficiency is poor. Inequality was rated 0–1; zero being the highest equality while 1 indicates the highest inequality. There is relatively high inequality (0.4–0.5) in Shanghai, Suzhou and Hefei. Most cities (20), however, showed equality (below 0.2). Nine (9) cities showed relative equality (0.2–0.3), while Wuxi, Bengbu and Zhenjiang were neutral (0.3–0.4). No city scored above 0.5. Water use efficiency in the majority of cities was poor. Only 11 out of 35 cities scored more than 50% efficiency. Poor irrigation, income and industrial water demand are the factors driving inefficiency and inequality. The categorization of cities into groups produced nine city types according to the spatial disposition of inequality. A combined effort to formulate policies targeting improved water use efficiency, reduced industrial consumption and improved irrigation, tailored towards the specific situation of each city type, would eliminate inequality.

scholarly journals Moderate Grazing Increases Water Use Efficiency for Environmental Health in Alpine Meadows of the Tibetan Plateau

2021 ◽  
Vol 9 ◽  
Author(s):  
Yunying Wang ◽  
Weiwei Pei ◽  
Guangmin Cao ◽  
Xiaowei Guo ◽  
Huakun Zhou ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Dominant Species ◽  
Alpine Meadow ◽  
Isotope Composition ◽  
The Tibetan Plateau ◽  
Important Indicator ◽  
Alpine Meadows ◽  
Use Efficiency ◽  
Coexisting Species

Water use efficiency is an important indicator of drought tolerance in plants. The response of the water use efficiency to different grazing intensities and adaptive mechanisms in alpine meadows remains unclear. To understand the changes in water use in alpine meadow ecosystems under different grazing gradients, grazing systems have to be optimized, and severely receding grasslands should be effectively restored. This study analyzed the response of water use efficiency of plant dominant species, coexisting species, and functional group-level plants to grazing intensity using the δ13C index in an alpine meadow. We found that grazing increased the leaf carbon isotope composition in plants (δ13C) of Gramineae by 3.37% and grazing at a moderate level significantly increased it by 4.84% (P < 0.05). In addition, an increase in δ13C was observed in the functional groups of Cyperaceae (3.45%), Leguminosae (0.81%), and Forb (1.40%). However, some dominant species and coexisting species showed the highest δ13C values under moderate grazing. These results indicate that moderate grazing may significantly improve the water use efficiency of species in alpine meadows. The path analysis showed that water use efficiency was negatively correlated with evapotranspiration (P < 0.05), soil water content, soil organic carbon, and soil bulk density. Nevertheless, there was a positive correlation between water use efficiency and the available nitrogen. This study concluded that moderate grazing could improve the efficiency of grassland water use to a certain extent. Additionally, soil evapotranspiration was the main driving factor affecting the water use efficiency of alpine meadows.

Sign in / Sign up

Export Citation Format

Share Document