L.I. Vanegas-Espinosa., D. Vargas-del-Río., G. Ochoa-Covarrubias., A. Grindlay., (2022). Flood Mitigation in Urban Areas through Deep Aquifer Recharge: The Case of the Metropolitan Area of Guadalajara
International Journal of Environmental Research and Public Health.
The Metropolitan Area of Guadalajara (MAG), in México, is experiencing scarcity and water over-exploitation. In addition, it suffers seasonal flooding that is inappropriately channeled, generating a strong negative environmental impact. These problems have their origin in the waterproofing of the urban area.
Muchas ciudades alrededor del mundo han utilizado pozos de inyección profundos para recuperar acuíferos y remover aguas superficiales, pero se requieren ciertas condiciones geohidrológicas para la implementación de estos pozos de inyección profundos, de más de 30 m de profundidad: significativa superficie de escorrentía, calidad de agua aceptable para la infiltración, profundidad considerable en los niveles freáticos y buena permeabilidad del subsuelo. Todas estas condiciones existen en el MAG o podrían lograrse sin inversión.
Se presenta un diagnóstico explorando la viabilidad de una solución basada en esta tecnología, como estrategia para recuperar acuíferos y reducir inundaciones. El primer paso fue identificar, a través del mapa algebra, una microcuenca apta para esta tecnología. Luego, se obtuvieron los volúmenes medios de escorrentía y se elaboró el perfil estratigráfico en base a 19 pruebas de penetración estándar (SPT). Con estos datos, se realizó una simulación numérica de pozos de inyección profunda de diferentes dimensiones, proporcionando recomendaciones para una solución basada en estos cálculos.
The results show that both problems can be solved with this relatively simple and cheap technology, which supports the public health.
The Metropolitan Area of Guadalajara (MAG), in México, is experiencing scarcity and water over-exploitation. In addition, it suffers seasonal flooding that is inappropriately channeled, generating a strong negative environmental impact. These problems have their origin in the waterproofing of the urban area.
Many cities around the world have used deep injection wells to recover aquifers and remove surface water, but it requires certain geohydrological conditions for the implementation of these deep injection wells, such as more than 30 meters depth, significant surface runoff, acceptable water quality for infiltration, considerable depth in the groundwater levels and good subsurface permeability. All these conditions exist in the MAG or could be achieved without investment.
A diagnostic to explore the feasibility of a solution based on this technology is presented as a strategy to recover aquifers and reduce flooding. The first step was to identify, through map algebra, a suitable micro basin for this technology. Then, it was obtained the mean volume of runoff and a stratigraphic profile based on 19 standard penetration tests (SPT) was developed. With this data, a numerical simulation of injection wells deep in different dimensions was performed, providing recommendations for a solution based on these calculations.
The results show that both problems can be solved with this relatively simple and cheap technology, which supports the public health.
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