Spatiotemporal variation and economic benefits of the water footprint of rice production in Jilin Province

• Published in: Guanʻgai paishui xuebao Vol. 44; no. 2; pp. 27 - 36
• Main Authors: WANG Bin, HOU Wenfeng, ZHANG Yu, LI Jiangtao, SHAO Zhenzhu, WANG Yin, GAO Qiang
• Format: Journal Article
• Language: Chinese
• Published: Science Press 01.02.2025
• Subjects: rice water footprint; blue water; green water; grey water; spatial and temporal differences; water footprint benefit evaluation
• ISSN: 1672-3317
• DOI: 10.13522/j.cnki.ggps.2024118

【Objective】The water footprint is a key metric for characterizing water usage from various sources in crop production, offering valuable insights for improving regional water allocations. Here, we analyzed the spatiotemporal variations and economic benefits of the water footprint of rice production in Jilin Province.【Method】Using data measured from 2005 to 2020, the water footprints of rice production, including total, green, blue, and grey water, were calculated. Using these data, we analyzed the spatiotemporal variations and economic benefits of the water footprints.【Result】① The water footprint of rice production exhibited significant interannual variation. Total water footprint per unit mass of rice grain ranged from 854.8 to 1 079.6 m3/t, with contributions from green water, blue water and grey water being 314.8-528.5 m3/t, 233.1-416.1 m3/t and 214.6-271.4 m3/t, respectively. Over the study period, the total, green, and grey water footprints displayed upward trends, while the blue water footprint decreas