Evaluating Cryospheric Water Withdrawal and Virtual Water Flows in Tarim River 
Basin of China: An Input-Output Analysis

Yang, Yang

doi:10.57757/IUGG23-4043

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Evaluating Cryospheric Water Withdrawal and Virtual Water Flows in Tarim River Basin of China: An Input-Output Analysis

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Yang, Yang
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Yang, Y. (2023): Evaluating Cryospheric Water Withdrawal and Virtual Water Flows in Tarim River Basin of China: An Input-Output Analysis, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4043

Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021483

Abstract

Abstract: In Tarim River Basin (TRB), the retreat of glacier and snow cover reduction due to cli-mate warming threatens the regional economy of downstream basins that critically depends on meltwater. However, the quantitative evaluation of its impact on multiple sectors of the socio-economic system is incomplete. Based on compiled regional input–output table of the year 2012, this study developed a method to analyze the relationships between economic activities and related meltwater withdrawal, as well as sectoral transfer. The results show that the direct melt-water withdrawal intensity (DMWI) of agriculture was much higher than other sectors, reaching 2348.02 m3/10,000 CNY. Except for A01 (agriculture) and A02 (mining and washing of coal), the embodied meltwater withdrawal (EMW) driven by the final demand of other sectors was greater than direct meltwater withdrawal, and all sectors required inflows of virtual water (72.45 × 108 m3, accounting for 29% of total supply from cryospheric water resources) for their production processes in 2012. For sectors with high DMWI, improving water-use efficiency is an effective way to reduce water withdrawal. To some extent, the unbalanced supply of cryospheric water resources due to geographical segregation can be regulated by virtual water flows from water-saving to water-intensive sectors. Such decisions can affect the balance between socioeconomic development and environment conservation for long-term sustainability.