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Influencing factors and improvement paths of green water use efficiency in the Yellow River Basin: a new perspective based on ecogeographical divisions

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Abstract

Exploring the influencing factors and improvement paths of green water use efficiency (GWUE) based on different regions is very important for the protection and utilization of water resources in the Yellow River Basin (YRB). However, previous studies focused only on the external impact of water use efficiency and did not take into account both internal and external factors. For the zoning of the YRB, the traditional upper, middle, and lower zoning methods were mostly used, and they could not show the impact of climatic and geological conditions. Therefore, based on ecogeographical divisions, the dynamic evolutionary characteristics, regional differences, and internal inefficiencies of green water use efficiency for 48 cities in the YRB from 2008 to 2018 are analyzed using a data envelopment analysis-slack-based measure (DEA-SBM) model, global Malmquist‒Luenberger (GML) index decomposition, and kernel density estimation. We further use a panel Tobit model to analyze the external influencing factors of green water use efficiency and propose ways to improve the utilization of water resources in different regions from both the internal and external perspectives. The results are as follows: (1) During the study period, the GWUE fluctuated between 0.58 and 0.67 and showed a trend of improving in the arid areas and deteriorating in the humid area. (2) Exploring the sources of inefficiency from the internal perspective reveals that the labor redundancy, capital redundancy, and wastewater redundancy in the semihumid area are higher; the energy redundancy in the semiarid area is higher; and the economic output in the arid area is insufficient. (3) From the GML perspective, the absolute difference in the green water use efficiency of the cities in the YRB is expanding. Regarding the technical efficiency (EC) index, the technical efficiency of the semiarid area has a convergence effect. Regarding the technological progress (TC) index, the gap in the arid area has been widening, and the technology in the semihumid and semiarid areas is converging backward. (4) There are significant differences in the external factors affecting GWUE in different ecogeographical regions. This study can help the government consider ecogeographical factors when formulating water resource-related policies, and it provides a scientific reference for how to better utilize water resources in different regions of the YRB from both the internal and external perspectives.

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Some or all data, models, or code that supports the findings of this study is available from the corresponding author upon reasonable request.

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Funding

This research was funded by the 2021 National Social Science Fund General Project “Research on the Optimization of the Spatial Layout of Manufacturing Industries in the Yellow River Basin from the Perspective of Ecological Zoning” (21BJY163).

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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Li Yue, Yuxuan Cao, and Rongfang Lvu. The first draft of the manuscript was written by Yuxuan Cao and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Rongfang Lyu.

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This work does not involve any hazards, such as the use of animal or human subjects. There is no plagiarism in our research or any data, articles or theories of others.

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This paper has not been and will not be submitted simultaneously to other journals. The paper is an entirely original work conducted by us without copying or plagiarism issues. The information reported in the paper is accurate to the best of our knowledge. A single study was not split into several parts to increase the quantity of submissions and be submitted to various journals or to one journal over time. We consent to publish.

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The authors declare no competing interests.

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Yue, L., Cao, Y. & Lyu, R. Influencing factors and improvement paths of green water use efficiency in the Yellow River Basin: a new perspective based on ecogeographical divisions. Environ Sci Pollut Res 30, 14604–14618 (2023). https://doi.org/10.1007/s11356-022-22981-2

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  • DOI: https://doi.org/10.1007/s11356-022-22981-2

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