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.

Study on Efficiency of Rainfall and Flood Water Resources Utilization in Coastal Area

2013 ◽  
Vol 409-410 ◽  
pp. 79-82 ◽  
Author(s):  
Ying Qin Chen ◽  
Xian Feng Huang
Keyword(s):  
Water Resources ◽  
Water Use Efficiency ◽  
Water Use ◽  
Environmental Water ◽  
Utilization Efficiency ◽  
Agricultural Water ◽  
Domestic Water ◽  
Flood Water ◽  
Use Efficiency ◽  
Water Resources Utilization

Due to the rich resources of urban rainwater and transit flood in coastal areas, rational utilization of rainfall and flood water resources can improve the sustainable utilization, to better serve the coastal development. In this paper, the available quantity of water rainfall and flood water resources in coastal are distributed to domestic water, industrial water, agricultural water and ecologic environmental water. Water price method is used to calculate domestic water efficiency. Energy synthesis is used to calculate the industrial and agricultural water-use efficiency. Ecologic environmental water-use efficiency-sharing coefficient method is used to calculate the ecologic environmental water-use efficiency. Finally, taking Lianyungang City, a Jiangsu coastal city as an example to analyze the rainfall and flood water resources utilization efficiency. The results provide reference to the research for Chinas plain area rainfall and flood water resources efficiency analysis.

scholarly journals Spatial–Temporal Evolution Characteristics and Influencing Factors of Agricultural Water Use Efficiency in Northwest China—Based on a Super-DEA Model and a Spatial Panel Econometric Model

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 632
Author(s):  
Weinan Lu ◽  
Wenxin Liu ◽  
Mengyang Hou ◽  
Yuanjie Deng ◽  
Yue Deng ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Water Resource ◽  
Arid Regions ◽  
Econometric Model ◽  
Northwest China ◽  
Agricultural Water ◽  
Agricultural Water Use ◽  
Use Efficiency ◽  
Semi Arid

Improving agricultural water use efficiency (AWUE) is an important way to solve the shortage of water resources in arid and semi-arid regions. This study used the Super-DEA (data envelopment analysis) to measure the AWUE of 52 cities in Northwest China from 2000 to 2018. Based on spatial and temporal perspectives, it applied Exploratory Spatial Data Analysis (ESDA) to explore the dynamic evolution and regional differences of AWUE. A spatial econometric model was then used to analyze the main factors that influence the AWUE in Northwest China. The results showed firstly that the overall AWUE in Northwest China from 2000 to 2018 presented a steady upward trend. However, only a few cities achieved effective agricultural water usage by 2018, and the differences among cities were obvious. Secondly, AWUE showed an obvious spatial autocorrelation in Northwest China and showed significant high–high and low–low agglomeration characteristics. Thirdly, economic growth, urbanization development, and effective irrigation have significant, positive effects on AWUE, while per capita water resource has a significant, negative influence. Finally, when improving the AWUE in arid and semi-arid regions, plans should be formulated according to local conditions. The results of this study can provide new ideas on the study of AWUE in arid and semi-arid regions and provide references for the formulation of regional agricultural water resource utilization policies as well.

Monitoring regional agricultural water use efficiency for Hebei Province on the North China Plain

2002 ◽  
Vol 53 (1) ◽  
pp. 55 ◽  
Author(s):  
Tim R. McVicar ◽  
Guanglu Zhang ◽  
Andrew S. Bradford ◽  
Huixiao Wang ◽  
Warrick R. Dawes ◽  
...  
Keyword(s):  
Time Series ◽  
Water Use Efficiency ◽  
Water Use ◽  
North China Plain ◽  
North China ◽  
Agricultural Practices ◽  
Water Saving ◽  
Agricultural Water ◽  
Agricultural Water Use ◽  
Use Efficiency

Increasing competition for water in China, due to industrialisation of its economy and urbanisation of its population, has led to the introduction of water-saving agricultural practices in an attempt to increase agricultural water use efficiency (Ag WUE). This study was conducted to assess whether changes in management practices have increased regional Ag WUE for a focus area covering 20% of the 300 000 km2 North China Plain (NCP). An ‘input–output’ definition of regional Ag WUE was used, where ‘input’ is the water available over the crop growing season and ‘output’ is grain yield. Regional databases of precipitation, irrigation, and yield from 1984 to 1996 were established in a Geographic Information System (GIS) to calculate winter wheat and summer corn Ag WUE on a county basis. For wheat, the average Ag WUE was 7.0 kg/ha.mm in 1984, whereas in 1996 it was 14.3 kg/ha.mm. For corn, Ag WUE increased from 9.0 kg/ha.mm in 1984 to 10.1 kg/ha.mm in 1996, although values >11.5 kg/ha.mm were obtained for both 1991 and 1992. Time series plots of the resulting Ag WUE, and its components, were generated to reveal spatial and temporal variability. Counties with a relatively high mean Ag WUE in combination with low year-to-year consistency have been identified as those with the highest potential for improving Ag WUE management. Total county water resources (WR) were also calculated for the time series, and county-basis normalisation of Ag WUE and WR also showed that there have been recent improvements in Ag WUE. For some counties in wet years, there may be an opportunity to plant larger areas of crop to increase county level Ag WUE. For the focus study site (and for the time series data available), it is most likely that recently introduced water-saving agricultural practices in the NCP are associated with improvements to Ag WUE.

scholarly journals Water-Use Efficiency of Crops in the Arid Area of the Middle Reaches of the Heihe River: Taking Zhangye City as an Example

Water ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1541 ◽  
Author(s):  
Xingyuan Xiao ◽  
Limeng Fan ◽  
Xiubin Li ◽  
Minghong Tan ◽  
Tao Jiang ◽  
...  
Keyword(s):  
Water Resources ◽  
Water Use Efficiency ◽  
Water Use ◽  
Water Consumption ◽  
Heihe River ◽  
Water Efficiency ◽  
Agricultural Water ◽  
Seed Corn ◽  
Field Corn ◽  
Use Efficiency

The middle reaches of the Heihe River are an important food base in the arid regions of Northwest China. The agricultural water consumption in this region accounts for about 90% of the total water consumption. The shortage of water resources is the primary reason for restricting agricultural development. Therefore, studying the efficiency of agricultural water use is essential to improving the effective use of water resources. Under the premise of considering agricultural water saving, we improved the water efficiency model from the perspective of pure agricultural income that farmers are more concerned about. In this study, we took Zhangye City in the middle reaches of the Heihe River as an example, based on meteorological crop data and farmer survey data. Then, we used the input–output method to quantitatively analyze the net income of the crops in Zhangye City. We used the CROPWAT model to calculate the water demand of crops during the growing season. Lastly, we used the improved water-use efficiency (WUE) model to analyze WUE differences of crops in the study area. We reached the following conclusions: (1) among the six crops in the study area, the net profit of seed corn was 20,520 yuan/ha, followed by field corn, 11,700 yuan/ha, then followed by potato, rapeseed, wheat, and barley; (2) the maximum water requirement for the crop growth period was 597.2 mm for field corn, followed by 577.3 mm for seed corn, then followed by rapeseed, wheat, barley, and potato; (3) among the six crops, the WUE calculated using the water efficiency model before and after improvement had obvious differences. The WUE calculated using the original model reached 9.03 yuan/m3 for potato, followed by 6.33 yuan/m3 for seed corn. The WUE calculated using the improved model reached 3.44 yuan/m3 for seed corn, which is the maximum, followed by potato with 2.25 yuan/m3. Considering the agricultural water saving and crop yields, we propose to properly expand the cultivation of seed corn and potato in the middle reaches of the Heihe River. This would be more conducive to achieving a “win-win” situation for water conservation and revenue.

scholarly journals Water Use Efficiency and Sensitivity Assessment for Agricultural Production System from the Water Footprint Perspective

2020 ◽  
Vol 12 (22) ◽  
pp. 9665
Author(s):  
Weiwei Wang ◽  
Jigan Wang ◽  
Xinchun Cao
Keyword(s):  
Water Resources ◽  
Water Use Efficiency ◽  
Water Use ◽  
Water Footprint ◽  
Agricultural System ◽  
Agricultural Water ◽  
Wheat Production ◽  
Agricultural Water Use ◽  
Efficiency Performance ◽  
Use Efficiency

The increasing shortage of water resources and the growing demand for crops make water use efficiency a decisive factor for the sustainable and healthy development of the agricultural system. In order to evaluate agricultural water use efficiency from the water footprint perspective, the current study constructed the comprehensive water efficiency (CWE) index based on eight single agricultural water use efficiency performance parameters. The water resources utilization and efficiency in the wheat production system of China from 2006 to 2015 were analyzed and the sensitivity of single indices for CWE was identified. The results show that the national crop water footprint (CWF) for wheat production was estimated to be, including 46.3% blue, 36.6% green and 17.0% blue components, respectively. The spatial distribution patterns of water use efficiency performance indices were different. CWE of the country was 0.387, showing an upward trend over time and decreased from the southeast to the northwest geographically. Crop water productivity (CWP), productive water ratio (PWR) and rainwater consumption ratio (RCR) turned out to be the first three sensitive parameters for CWE in China. The improvement of China’s overall CWE relied on reducing inefficient blue-green water use and increasing the output capacity for per unit water. Advanced agricultural water-saving technologies were in high need for goal achievement, especially for the Huang-Huai-Hai plain, which held more than 70% of Chinese wheat production and CWF. The results provide support for efficient utilization and sustainable development of water resources in the agricultural system.

scholarly journals Water-saving irrigation technologies and water use efficiency in agriculture

2017 ◽  
Vol 4 ◽  
pp. 21-26
Author(s):  
Pulatov Ya.E.
Keyword(s):  
Food Safety ◽  
Water Resources ◽  
Water Use Efficiency ◽  
Water Use ◽  
Water Saving ◽  
Agricultural Crops ◽  
Water Savings ◽  
Effective Utilization ◽  
Use Efficiency ◽  
Irrigation Technologies

Results of researches of water saving up technologies for irrigation of agricultural crops and effective utilization of water resources in the Tajikistan are described. The comparative estimation of usage methods of water savings is spent and proved that the cheapest method of additional safeguarding of volume of water (up 1000 м3) appeared during introduction of water saving up technologies for irrigation at which expenses is only 1…5 US dollars. It is established that on prospect for maintenance of food safety for Tajikistan it is necessary to develop the suitable new earths for irrigation equal 500…800 thousand hectare, thus a total perspective water fence for all branches of economy will reach volume 18 км3. Lacks of existing system irrigation are revealed that efficiency of use of irrigating water very low and make up from 0.4 to 0.6. Water saving up technologies depending on investment of capital is divided into 2 groups: water saving up technologies, demanding small expenses and demanding big expenses. It is established that at a drop irrigation of a cotton, corn, vegetable cultures and microirrigation of wheat, the economy of irrigating water reaches up to 60 %, and productivity raises in 1.8 … 2.0 times.

scholarly journals Agricultural Water Use Efficiency—A Case Study of Inland-River Basins in Northwest China

2020 ◽  
Vol 12 (23) ◽  
pp. 10192
Author(s):  
Wei Qu ◽  
Yanmei Tan ◽  
Zhentao Li ◽  
Eefje Aarnoudse ◽  
Qin Tu
Keyword(s):  
Water Resources ◽  
Water Use Efficiency ◽  
Water Use ◽  
Linear Regression Analysis ◽  
Northwest China ◽  
River Basins ◽  
Gansu Province ◽  
Utilization Efficiency ◽  
Inland River ◽  
Use Efficiency

Water resources play a vital role in the process of economic development, especially in arid and semi-arid regions. Improving the efficiency of water use is an effective way to solve the shortage of water resources. In this paper, influencing factors of water utilization efficiency in three inland river basins (Shiyang, Heihe, and Shule river) in Gansu Province, Northwest China, are investigated. Using survey data of 306 households, results of the multiple linear regression analysis show that management capacity and its strictness in a different basin, irrigation technology and facility conditions, and farmers’ self-government are key factors affecting farmers’ irrigation efficiency. Additionally, factors at the farmer and family level, as well as the differences in natural conditions and economic and social development in different regions, also have a significant impact on water use efficiency.

scholarly journals Agricultural Water Use Efficiency and Rebound Effect: A Study for China

2021 ◽  
Vol 18 (13) ◽  
pp. 7151
Author(s):  
Hang Xu ◽  
Rui Yang ◽  
Jianfeng Song
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Causal Effect ◽  
Rebound Effect ◽  
Water Shortage ◽  
Water Saving ◽  
Water Withdrawal ◽  
Agricultural Water ◽  
Agricultural Water Use ◽  
Use Efficiency

Agricultural water use accounts for the largest proportion of water withdrawal, so improving agricultural water use efficiency is an important way to alleviate water shortage. However, the expected water saving by the improved agricultural water use efficiency may be offset by the rebound effect, which means the goal of water saving by improving agricultural water use efficiency is not achieved. Based on the definition of the rebound effect of agricultural water use, this paper first uses a fixed model to measure the causal effect of agricultural water use efficiency on agricultural water use to analyze the agricultural water rebound effect, then analyses the heterogeneity and mechanism of the effect of agricultural water use efficiency on agricultural water use with the panel data from 30 provinces or cities in China from 2000 to 2017. The results show that, firstly, the agricultural water use efficiency has a significant negative effect on agricultural water use, but the average agricultural water rebound effect is 88.81%. Secondly, the effect of agricultural water use efficiency on agricultural water use is heterogeneous, in which the improvement of agricultural water use efficiency in humid or major grain-producing areas will have a lower agricultural water rebound effect. Finally, agricultural water use efficiency can affect agricultural water use through planting area and planting structure. An increase in agricultural water use efficiency will expand the planting area to increase water use. However, this will change the planting structure to decrease water use. The implication for agricultural water management is that the irrigation agricultural scale has to be controlled under the condition of available water resource, while improving agricultural water use efficiency.

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