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.

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.

scholarly journals Investigating the spatiotemporal differences and influencing factors of green water use efficiency of Yangtze River Economic Belt in China

PLoS ONE ◽  
2020 ◽  
Vol 15 (4) ◽  
pp. e0230963
Author(s):  
Ke-Liang Wang ◽  
Jianguo Wang ◽  
Jianming Wang ◽  
Lili Ding ◽  
Mingsong Zhao ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Influencing Factors ◽  
Water Use ◽  
Yangtze River ◽  
Green Water ◽  
Use Efficiency

scholarly journals Evaluation and Drivers of Green Agricultural Water Use Efficiency in Yangtze River Economic Zone

2020 ◽  
Vol 15 (8) ◽  
pp. 1333-1339
Author(s):  
Lelai Shi ◽  
Jing Zhou ◽  
Suhui Liu
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Regional Differences ◽  
Yangtze River ◽  
Tobit Model ◽  
Agricultural Water ◽  
Agricultural Water Use ◽  
Use Efficiency ◽  
The Mean ◽  
Economic Zone

The efficient use of agricultural water is the key for Yangtze River Economic Zone (YREZ) to realize ecological green development. Taking the panel data on 11 YREZ regions in 2011-2018 as the object, this paper establishes an evaluation indicator system for green agricultural water use efficiency (GAWUE) containing undesired output, and adopts the epsilon-based measure (EBM) model to evaluate YREZ’s GAWUE. After analyzing the regional differences in YREZ’s GAWUE, the Tobit model was introduced to verify the drivers of GAWUE. The results show that: In the study period, YREZ’s GAWUE exhibits some regional differences. The mean GAWUEs of Shanghai, Jiangsu, Zhejiang, and Sichuan were optimized; those of Guizhou, Yunnan, Chongqing, and Hubei were relatively desirable, leaving a small room for improvement, the mean GAWUEs of Hunan, Jiangxi, and Anhui were undesirable, waiting for major improvement in future. Overall, the lower reaches had the highest GAWUE, followed by the upper reaches, while the middle reaches had the minimum GAWUE. The Tobit model shows that agricultural technological growth (ATG) and agricultural water intensity (AWI) greatly promote GAWUE, while farmer income level (FIL), water resources endowment (WRE), agricultural planting structure (APS), and farmland irrigation area (FIA) significantly suppress GAWUE.

scholarly journals Peningkatan Efisiensi Penggunaan Air Irigasi dengan Aplikasi Jadual Tanam Secara “Nyorog” pada Subak

2019 ◽  
Vol 4 (1) ◽  
pp. 35
Author(s):  
I Wayan Tika ◽  
I. A. Bintang Madrini ◽  
Sumiyati .
Keyword(s):  
Water Management ◽  
Water Use Efficiency ◽  
Water Use ◽  
Irrigation Water ◽  
Water Demand ◽  
High Peak ◽  
Water Shortages ◽  
Irrigation Water Management ◽  
Irrigation Water Use ◽  
Use Efficiency

Salah satu program penting dalam intensifikasi budidaya padi adalah pengelolaan air irigasi yang efisien. Pada subak di Bali pelaksanaan jadual tanam biasanya dilakukan secara serenpak sehingga terjadi puncak kebutuhan air yang tinggi. Akibatnya sangat berisiko terhadap kekurangan atau kelebihan air irigasai pada subak tersebut. Kondisi demikian menyebabkan efisiensi penggunaan air irigasi pada subak menjadi rendah. Salah satu solusi untuk meingkatkan efisiensi penggunaan air irigasi tersebut adalah dengan melakukan jadual tanam tidak serenpak yang pada subak dikenal dengan istilah nyorog. Dengan demikian perlu dikaji besarnya peningkatan efisiensi penggunaan air irigasi jika jadual tanam dilakukan secara nyorog Berdasarkan data yang telah dikompilasi diperoleh efisiensi penggunaan air irigasi yang dilakukan saat ini sebesar 76,52%. Saat ini pada obyek penelitian jadual tanam dibagi menjadi dua kelompok dengan beda jadual tanam antar kelompok tersebut sekitar satu bulan, dengan awal jadual tanam mulai Pebruari I.  Jika dilakukan jadual tanam secara serempak pada Pebruari II diperoleh efisiensi penggunaan air irigasi sebesar 69,05%.  Jika jadual tanam dilakukan secara nyorog dengan membagi subak menjadi empat kelompok dan setiap kelompok perbedaan jadual tanam sekitar setengah bulan serta awal jadual tanam pada Bulan Pebruari I maka diperoleh efisiensi penggunaan air irigasinya 86,52%.  Dengan demikian jadual tanam secara nyorog dapat meningkatkan efisiensi penggunaan air irigasi dari 69,05% menjadi 86,52%.    One important program in the intensification of rice cultivation is efficient irrigation water management. In subak in Bali the planting schedule is usually carried out simultaneously so that there is a high peak of water demand. As a result, it is very risky for irrigation water shortages or excess in the subak. Such conditions cause the efficiency of the use of irrigation water in subak to be low. One solution to improve the efficiency of the use of irrigation water is by not planting simultaneously which are known as nyorog in subak. Thus, it is necessary to assess the magnitude of the increase in the efficiency of the use of irrigation water if the planting schedule is carried out in a systematic manner. Based on the data that has been compiled in Subak Guama  the efficiency of the use of irrigation water is 76.52%. At present the object of the planting schedule is divided into two groups with different planting schedules between groups of about one month, with the start of the planting schedule starting in February I. If the planting schedule is simultaneously held in February II, the efficiency of irrigation water use is 69.05%. If the planting schedule is carried out systematically by dividing subak into four groups and each group different planting schedules of about half a month and the beginning of the planting schedule in February I, it is obtained that the water use efficiency of irrigation is 86.52%. Thus the planting schedule nyorog can increase the efficiency of irrigation water use through 69.05% to 86.52%.

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