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China holds the distinction of being the foremost global consumer of water resources and contends with a significant level of water scarcity. In light of this quandary, China has been assiduously endeavoring to foster water conservation practices with the ultimate objective of reaching a peak point in water use. In this paper, we construct a framework for forecasting China's total water use (TWU) peak path. In this framework, we select influencing factors in terms of both economy and technology to forecast the peak path of China's TWU under six different scenarios, and analyze the economic and technological circumstances at the peak. Our findings indicate that China's TWU will persist in its upward trend based on both the high growth and business as usual scenarios. The projected peak period is estimated to transpire in 2037, 2032, 2030, and 2028, respectively, with the corresponding peak levels amounting to 644.03, 633.93, 625.79, and 620.92 billion m3. However, in the low growth scenarios, China's TWU reached its peak in 2013. The extent of economic development plays a pivotal role in determining the timing and manner of water usage peaking. Early peaking of water usage could potentially result in a loss of gross domestic product (GDP). Furthermore, technological advancements hold the potential to facilitate a reduction in water use without requiring a significant trade‐off between resource conservation and economic development. The results of sensitivity analysis show that the average acreage of water used for irrigation on cropland, GDP, water use efficiency, and population contribute the most to TWU, while the increase in the proportion of industrial, service, and water‐saving irrigation area can reduce water use. Our analytical framework provides a commonly applicable solution for the water use forecast in areas seeking to reach the water use peak or to achieve sustainable development. [ABSTRACT FROM AUTHOR]

In China, the contradiction between rapid economic development and water shortage has attracted much attention. This paper explores the problems of water consumption and environmental pollution in provinces with different economic development levels in China. Sewage discharge is put into the undesirable meta frontier dynamic data envelopment analysis (DEA) model as an undesirable output variable. The water use efficiency under different income levels from 2013 to 2017 is compared at the provincial level from the perspective of domestic water use efficiency, ecological water use efficiency, industrial water use efficiency and agricultural water use efficiency, and the dynamic evolution is further revealed by using kernel density estimation. The results show that water resource utilisation efficiency is positively correlated with regional income level and economic development level. The internal differences in high‐income areas are narrowing, while the internal differences in middle‐income areas are significantly expanding; agricultural water use efficiency is the most prominent problem. In view of these situations, the total amount and intensity of water consumption should be controlled in high‐income areas. For middle‐income provinces with abundant water resources but low efficiency, local governments can strengthen legislation and supervision. [ABSTRACT FROM AUTHOR]

The contradiction between China's economic development, its need for resources and the protection of the environment is ctitical. Scarce water resources have resulted in a considerable bottleneck restricting the economic development of water‐deficient areas. An objective evaluation of the decoupling state of water consumption and economic development has become an important indicator of regional economic sustainable development. Based on panel data from 2000 to 2017 for six provinces in the arid and semiarid regions of Northwest China, the Logarithmic Mean Divisia Index method is employed to decompose the factors of the decoupling index and establish a decoupling relationship model between water consumption and economic development. The reasons that affect the decoupling state of water resource utilization and economic development are herein discussed, and the stability of the decoupling trend is analysed. Based on the overall regional trend, the decoupling state of the arid and semiarid regions in Northwest China improved from weak to strong, but the high decoupling stability index varied among the provinces. The intensity and structure were promotional factors for decoupling water consumption and economic development, and the contribution rate of the intensity factor was higher than that of the structure factor. Income and population were inhibiting factors for decoupling water consumption and economic development, and the contribution rate of the income factor was higher than that of the population factor. Based on these results, corresponding policy recommendations are provided. [ABSTRACT FROM AUTHOR]