Abstract
Managed aquifer recharge (MAR) is part of the palette of solutions to water shortage, water security, water quality decline, falling water tables, and endangered groundwater-dependent ecosystems. It can be the most economic, most benign, most resilient, and most socially acceptable solution, but frequently has not been implemented due to lack of awareness, inadequate knowledge of aquifers, immature perception of risk, and incomplete policies for integrated water management, including linking MAR with demand management. MAR can achieve much towards solving the myriad local water problems that have collectively been termed “the global water crisis”. This special issue strives to elucidate the effectiveness, benefits, constraints, limitations, and applicability of MAR, together with its scientific advances, to a wide variety of situations that have global relevance. This special issue was initiated by the International Association of Hydrogeologists Commission on Managing Aquifer Recharge to capture and extend from selected papers at the 10th International Symposium on Managed Aquifer Recharge (ISMAR10) held in Madrid, Spain, 20–24 May 2019.
Highlights
The papers in this special issue explain how managed aquifer recharge (MAR) addresses water resilience challenges across the globe
MAR is used for ecological restoration of wetlands and stream habitats that have been impacted by surface water and groundwater extraction
An aquifer affected by seawater intrusion in Barcelona (Spain) has been preserved by a hydraulic barrier created by MAR, in a study by Fernández et al [1], which demonstrated improved water quality by mitigating and preventing further water quality deterioration
Summary
The papers in this special issue explain how managed aquifer recharge (MAR) addresses water resilience challenges across the globe. The thematic categories include water security improvement, water quality improvement and environmental protection and restoration Following these are some cross-lapping supportive themes referenced above: mapping of suitable MAR sites and identifying opportunities; continental-scale and national overviews of MAR practices and policies; operational issues including management of clogging; and innovation in MAR methods and monitoring. It highlights the section of this introductory paper where each paper is featured and includes information on the type of source of water used; type of target aquifer involved; type of recharge method; end use of recovered water, and represented geographic area
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