Green efficiency of water resources in Northwest China: Spatial-temporal heterogeneity and convergence trends

2021 ◽  
pp. 128651
Author(s):  
Wei-ping Wu ◽  
Yi-fei Zhu ◽  
Wei-kang Zeng ◽  
Min Wang ◽  
Dong-xiao Yang ◽  
...  
Keyword(s):  
Water Resources ◽  
Northwest China ◽  
Temporal Heterogeneity

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.

Water resources utilization and eco-environmental safety in Northwest China

2006 ◽  
Vol 16 (3) ◽  
pp. 277-285 ◽  
Author(s):  
Jishi Zhang ◽  
Jinxiang Xu ◽  
Yongqiu Zhang ◽  
Mingquan Wang ◽  
Zhongshan Cheng
Keyword(s):  
Water Resources ◽  
Northwest China ◽  
Environmental Safety ◽  
Water Resources Utilization

Assessing groundwater sustainability and the influence of water transfer project in Sugan Lake Basin, northwest China

2020 ◽  
Author(s):  
Zhengqiu Yang ◽  
Litang Hu
Keyword(s):  
Water Resources ◽  
River Flow ◽  
Northwest China ◽  
Water Transfer ◽  
Water Diversion ◽  
Lake Basin ◽  
Groundwater Drawdown ◽  
Ecological Water Requirement ◽  
Influence Of Water ◽  
Spring Flow

<p>In order to meet the ecological water requirement, a water transfer project that divert river flow from the Sugan Lake Basin to the Dunhuang Basin is under consideration. Inter-basin water diversion project is an effective tool to deal with the uneven distribution of water resources and climate change. However, there is still a lack of research on hydrogeology in the Sugan Lake Basin at present. In this study, FEFLOW software was used to establish a numerical model and it was well calibrated by FEPEST. The result shows that the infiltration of the river surged in 2017–2018 so that the groundwater storage significantly increased in resent year. Under four water transfer scenarios, model was used to predict and analyze the influence of transfer project. When the diversion plan had implemented, the groundwater drawdown gradually increased from west to east in the upstream zone and the gobi zone. The biggest groundwater drawdown were 51.10 m, 56.70 m, 62.34 m and 68.02 m in four transfer conditions. In addition, groundwater level of wetland at most decline by 3.80 m, 4.06 m, 4.30 m and 4.77 m. Water diversion also made a great impact on the spring flow in the basin. The rate of Middle Spring reduced to 0.75 × 10<sup>8</sup> m<sup>3</sup>/a – 0.81 × 10<sup>8</sup> m<sup>3</sup>/a after 100 year, and it would reduce to 0.20 × 10<sup>8</sup> m<sup>3</sup>/a – 0.40 × 10<sup>8</sup> m<sup>3</sup>/a when groundwater system was steady. Nevertheless, the direct discharge from groundwater to lakes basically was not affected. The developed model and results will help to make an effective management of water resources.</p>

Analysis of the Temporal-Spatial Characteristics of Cloud Parameters and the Relationship with the Precipitation over Qilian Mountains Area in Northwest China

2020 ◽  
Author(s):  
Wu Zhang ◽  
Ying Wang ◽  
Qingyun Zhao ◽  
Chen Pu ◽  
Yan Chen
Keyword(s):  
Water Resources ◽  
Water Resource ◽  
Northwest China ◽  
Cloud Water ◽  
Qilian Mountains ◽  
Physical Parameters ◽  
Cloud Parameters ◽  
Four Seasons ◽  
Cloud Parameter ◽  
The Relationship

<p>Qilian mountains, located in the arid and semi-arid region of Northwest China, has more amount of natural precipitation than that on both north and south sides, with unique geographical environment and abundant water vapor supply. It is a very important water resource for the surrounding areas. To deeper understand the features of cloud over the areas is significant for the utilization of cloud water resources and sustainable development in this region. In this article, based on MOD08-M3 data, grid ground precipitation data and FY-2 series satellite cloud parameter inversion products, the spatial and temporal features of cloud macro/micro physical parameters, such as Cloud Amount（CA）, Cloud Water Path（CWP）, Cloud Top Temperature（CTT）, Cloud Top Pressure（CTP）, Cloud Optical Depth（COD） and Cloud Particle Effective Radius (CPER) over Qilian Mountains area were analyzed, as well as the relationship between the precipitation and cloud parameters. The results are as follows:</p><ul><li>(1) The regional average values of CA, CWP, CTP, COD and CPER in Qilian Mountains area are 55.50 %, 148.95 g/m², -21.13 ℃, 456.56 hPa, 12.64 and 21.04 μm, respectively. From 2006 to 2015, CA, CWP, COD and CPER decreased by 2.3 %, 21 g/m², 0.68 and 0.51 μm, respectively. CTT and CTP increased by 1.9 ℃ and 65.2 hPa, respectively. Cloud water resources over the area are abundant.</li> <li>(2) There is the richest cloud water resource over the main area of Qilian Mountains, and the cloud parameter condition in Wushaoling area is the best for precipitation. The high value areas of CA in four seasons are distributed in Xining and surroundings, main and south part of mountain range, and Lenghu area, respectively. The high value areas of CWP in four seasons are located in the northeast, north-middle the main part of mountain area and the eastern side of Subei, respectively. The high value areas of COD are located in the east of Subei in winter and in the southeast of the study area in other seasons. The high value areas of CPER in spring are located in the region except Hexi Corridor. In other seasons they are located between Lenghu and Subei, Subei and Tuole, and in the northeast of range, respectively.</li> <li>(3) The monthly precipitation is positively correlated with CA , CWP, COD, but negatively correlated with CTT and CTP. The relationship between CPERs and precipitation is positive in January, April, July, November and December, but negative in other months. CA and CPERs are most correlated with precipitation in May and September, respectively. while the correlation between other cloud parameters and precipitation are the highest in January.</li> <li>(4) When the values of COD and CPER are too small or too large, the actual precipitation will be limited.</li> </ul><p><strong>Key words: </strong>Cloud physical parameters; Precipitation; Water resource; Qilian Mountains</p>

scholarly journals Life cycle water footprint assessment of concrete production in Northwest China

Water Policy ◽  
2021 ◽  
Author(s):  
Chao Ding ◽  
Wenxiu Dong ◽  
Ailin Zhang ◽  
Zhenhua Wang ◽  
Na Zhao ◽  
...  
Keyword(s):  
Life Cycle ◽  
Water Resources ◽  
Water Consumption ◽  
Product Life Cycle ◽  
Water Footprint ◽  
Comprehensive Evaluation ◽  
Northwest China ◽  
Stress Index ◽  
Moderate Pressure ◽  
Concrete Production

Abstract Concrete requires a large amount of water throughout the product life cycle. This study constructs a comprehensive evaluation model of the life cycle water footprint (LCWF) of concrete production. It calculates the LCWF of concrete in Northwest China. The main conclusions are: (1) The vast water consumption of the concrete industry is closely related to VWF, which is the focus of LCWF assessment. The first three significant factors are WF of Coarse aggregate, Meals, and Cement. (2) the overproduction of cement is 15,731 × 104t, which results in the excessive consumption of water resources of 24,035 × 104m3. Excessive water consumption in the domestic cement trade is equivalent to an outflow of water resources. (3) The water stress index (WSI) of Northwest China is 0.67 (in Heavy pressure). The WSI of Qinghai (0.05) and Shaanxi (0.5) are in Mild pressure and Moderate pressure, respectively, while the WSI of Gansu is 0.67 (in Heavy pressure). It is worth noting that the WSI of Ningxia (9.01) and Xinjiang (1.28) are under Extreme pressure. The sustainable development of water resources in Northwest China is under heavy pressure, exacerbated by the growth of the concrete and cement industries.

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