Publication: The vulnerability of regional agriculture regarding irrigation water from the Tagus-Segura transfer
Authors
Buendía Azorín, José Daniel ; Martinez Alpañez, Ruben ; Sanchez de la Vega, Maria del Mar
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Publisher
Elsevier
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DOI
https://doi.org/10.1016/j.agwat.2025.109332
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info:eu-repo/semantics/article
Description
©2025. This manuscript version is made available under the CC-BY 4.0 license http://creativecommons.org/licenses/by/4.0/
This document is the Published,version of a Published Work that appeared in final form in Agricultural Water Management,. To access the final edited and published work see https://doi.org/10.1016/j.agwat.2025.109332
Abstract
Input–output tables provide a useful tool for analysing economic and environmental impacts, which has led to
their extension beyond the national level to the regional level. The availability of the intermediate demand
matrix allows for the extraction of income multipliers and employment multipliers to assess the environmental
impacts of different economic activities. This can intuitively be expected to play an important role in economic
growth and employment in many regions, and to allow for more precise policy decision-making and application
in sustainable development strategies. Despite the relevance of these input-output tables at regional level, there is an almost total absence of official data in most countries. This has led to the development of regionalisation
methodologies, among which are those based on the application of location quotients. In these methods, corrections are applied to the obtained variables that depend on the value given to certain unknown parameters.
This paper use a proposal of a simple and efficient procedure for estimating these parameters from generally
available information on road freight transport and goods imports from the rest of the world. Applying them to
estimate the input-output matrix of the Region of Murcia (Spain) made it possible to measure the economic
impact of the Tagus-Segura transfer and to assess the impact of a reduction in the volume of transferable water. A hybrid approach was applied to obtain the Bi-Regional Input-Output matrix, which combines pure non-survey
methods with matrix-balancing methods. This study quantifies the total contribution (direct, indirect and
induced) of the agricultural branches associated with the irrigation water of the Tagus-Segura transfer to the
economic output of the Region of Murcia. In addition, it estimates that a 50 % reduction of the current transferable volume of water would reduce regional output, Gross Value Added and regional employment by 1.6 %, 1.5 % and 3.8 %, respectively.
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Citation
Agricultural Water Management, 395, 2025
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Este ítem está sujeto a una licencia Creative Commons. http://creativecommons.org/licenses/by/4.0/