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A risk analysis of abstraction-related subsidence based on roughness analysis

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Abstract

The intense abstraction from more than 50 wells located in Irapuato City, Mexico, is inducing soil fracturing. The subsidence process is generating faults and fractures that affect the urban infrastructure. Up to 18 fault systems have been detected with accumulated vertical displacements from 10 mm to 2.1 m. A risk assessment was carried out based on roughness analyses from a multispectral image with a pixel size of 15 × 15 m and fault mapping. The paper demonstrates how a roughness image, supported by false colour imagery, can provide a quick analysis of the actual and potential damage to houses and infrastructure.

Résumé

Les pompages importants réalisés à partir de 50 puits situés à Irapuato, au Mexique, entraînent la compaction des sols et des tassements à l’origine de failles et de fractures affectant les infrastructures urbaines. Jusqu’à 18 systèmes faillés ont été détectés, avec des déplacements verticaux cumulés de 10 mm à 2,1 m. Une évaluation des risques a été réalisée, se basant sur une cartographie des failles et des analyses de rugosité d’images à partir d’images numériques multi-spectrales, avec un pixel de 15 m × 15 m. L’article montre comment l’analyse de la rugosité d’image, soutenue par l’imagerie fausses couleurs, peut fournir une rapide analyse des dommages réels et potentiels affectant des bâtiments et des infrastructures.

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Acknowledgments

The project was partially financed by the Council of Science and Technology Guanajuato, CONCyTEG, grant GTO-04-C02-113. Field work was carried out in collaboration with I. Rodriguez, and the ICA UG students D. Rodriguez, G. Lopez and F. Elias.

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Correspondence to Ramiro Rodriguez.

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Rodriguez, R., Lira, J. A risk analysis of abstraction-related subsidence based on roughness analysis. Bull Eng Geol Environ 67, 105–109 (2008). https://doi.org/10.1007/s10064-007-0114-1

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