Allocation of Groundwater Recharge Zones in a Rural and Semi-Arid Region for Sustainable Water Management: Case Study in Guadalupe Valley, Mexico

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Abstract
Around the world, groundwater constitutes approximately 94% of the total volume of freshwater, providing a wide range of economic and environmental services. In Baja California, Mexico, groundwater provides around 60% of the required demand and has become an essential source for agriculture, industry and domestic use. Particularly, in the Guadalupe Valley, in the municipality of Ensenada, the development of diverse activities depends on the water stored in the aquifer. Among these activities, agroindustry stands out; due to its high value, it represents a regional development factor. The objective of this research consisted of identifying potential aquifer recharge sites as tools for the planning process for regional socio-economic development. The study consisted of four fundamental parts: (1) Compilation and identification of entry data of the recharge model; (2) identification and evaluation of the sites that have a greater or lesser capacity of water recharge, using a geographic information system (GIS); (3) comparison of the model results with the piezometric data of two wells in the study area and their relationship with precipitation events; (4) finally, the development planning instruments of the study area were identified, and the relevance of the present study as a planning tool was evaluated. The results obtained showed that 16.31% and 3.64% of the area presents a high and very high recharge potential, respectively. This article is useful for the authorities and users to develop projects for aquifer recharge in the Guadalupe Valley.

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