Emergy analysis of the blue and green water resources in crop production systems

Shang, Kehui; Zhuo, La; Yang, Xi; Yue, Zhiwei; Zhao, Danyue; Wu, Pute

doi:10.1016/j.jclepro.2021.128666

Cited by 11 publications

(1 citation statement)

References 39 publications

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“…Conventional water resource assessments focus on the availability of blue water and its allocation for use in irrigation sectors, but the largest part of water use is green [34]. The water resources consumed by agricultural production can be divided into blue and green water, which contribute differently to agricultural production [35]. In fact, 80% of the world's farmland is rainfed, which produces 60-80% of the world's food, and only consumes green water; in other words, rainfed agriculture only consumes green water, while irrigated agriculture consumes both green and blue water [36].…”

Section: Methodsmentioning

confidence: 99%

Integrating Blue and Green Water to Identify Matching Characteristics of Agricultural Water and Land Resources in China

Geng

Liu

et al. 2022

Water

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The uneven distribution and spatial mismatch between water and land resources (WLR) limit the utilization efficiency of agricultural water and land resources (AWLR), and then pose a threat to food production. There is a critical need to understand their matching characteristics for strategic resource allocation decisions and management. In this study, a holistic index (RSI) derived from resource equivalency analysis (REA) was developed which contributed to examine the abundance or deficiency of agricultural water and land resources (AWLR) based on the conception of generalized water resources (including blue water and green water). Results indicate that the matching degree of AWLR was the lowest in Northeast China, North China and Gansu in Northwest China, while the highest value was in Xinjiang due to the higher blue water use. In north China, other provinces suffered water scarcity except in Jilin, Liaoning, Henan, while all provinces in south China suffered land scarcity except in Tibet and Jiangsu. Meanwhile, the matching of AWLR was not exactly consistent with the distribution pattern of precipitation. The higher proportion of green water resources was not located in southeast China with rich precipitation; it had to do with water management. Too much or little water resources can result in the increasing of blue water use. The proposed approach can be a powerful instrument to implement public policies and management strategy as an attempt to improve the utilization efficiency and enhance the optimize-allocation of AWLR.

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Section: Methodsmentioning

confidence: 99%