Green water appropriation of the cropland ecosystem in China

Ma, Weijing, Wei, Feili, Zhang, Jianpeng, Karthe, Daniel and Opp, Christian, (2022). Green water appropriation of the cropland ecosystem in China. Science of the Total Environment, 806 1-12

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  • Sub-type Journal article
    Author Ma, Weijing
    Wei, Feili
    Zhang, Jianpeng
    Karthe, Daniel
    Opp, Christian
    Title Green water appropriation of the cropland ecosystem in China
    Appearing in Science of the Total Environment
    Volume 806
    Publication Date 2022-02-01
    Place of Publication Amsterdam, Netherlands
    Publisher Elsevier B.V.
    Start page 1
    End page 12
    Language eng
    Abstract Despite the awareness that green water is the main source of water to produce food, studies on green water use in cropland ecosystems are still rather limited, and almost no research has so far explored the relationship between green water utilization and socioeconomic development. In this study, with the help of CropWat 8.0, the green water footprint (GWF) of main crops in China was estimated from 1979 to 2016. On this basis, a novel concept, i.e., green water appropriation rate (GWar), was introduced to reveal the relationship between GWF and precipitation. Then, for the first time, the center of gravity trajectory of the GWar and the correlation between GWar and socioeconomic factors were further investigated. The results show that the provinces with the largest increases of GWF were Inner Mongolia (223%), Xinjiang (127%), and Ningxia (123%), while the GWF of 11 provinces has decreased, and 9 of them were municipalities or coastal areas. Generally, the GWar in the eastern and central provinces was higher than that in the western provinces. The center of gravity of the GWar has always been in Henan Province, but it has moved westward from Kaifeng City in 1979 to Sanmenxia City in 2016 and may further move to Shanxi Province soon. The total power of agricultural machinery and the effective irrigation rate had a positive correlation with the GWar, while the agricultural GDP was negatively correlated with the GWar. It is expected that the results will explicitly provide a scientific basis for the development of water-appropriate agriculture and the full utilization of rainwater.
    UNBIS Thesaurus CHINA
    Keyword Green water footprint
    CropWat 8.0
    Standard deviational ellipse
    Spatial heterogeneity
    Water-appropriate agriculture
    Copyright Holder Elsevier B.V.
    Copyright Year 2021
    Copyright type All rights reserved
    DOI 10.1016/j.scitotenv.2021.150597
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    Created: Thu, 28 Oct 2021, 01:06:47 JST by Eric Siegmund on behalf of UNU FLORES