Abstract
ABSTRACTManaged aquifer recharge can store surface water as safe and reliable groundwater for later recovery. However, most options are problematic in karstic aquifers due to complex hydrodynamics reducing their effectiveness and hence general applicability. River bank filtration and urban stormwater infiltration systems are among the main managed recharge approaches to cope with this complexity. Experiences in Lebanon demonstrate the viability of these and other options in karstic domains.
Highlights
The distribution of water resources varies at a regional and global scale, with intensifying changes mainly due to population growth, rapid urbanization, increasing living standards, pollution of water resources, and changing climates (UNESCO-IHP, 2011)
Managed aquifer recharge as a non-conventional method to augment water supply is spreading worldwide with many advantages, among others: (1) coping with water needs, (2) improving water quality via geo-purification or soilaquifer treatment, (3) mitigating saltwater intrusion in coastal areas, and (4) adapting with climate change
Some problematics face its application in karstic domains due to complex hydrodynamics and low chemical attenuation it has inherent advantages on the other hand
Summary
The distribution of water resources varies at a regional and global scale, with intensifying changes mainly due to population growth, rapid urbanization, increasing living standards, pollution of water resources, and changing climates (UNESCO-IHP, 2011). With a 1% annual increase in global water demand, it is anticipated that around 5 billion people will face water shortages in 2050 (i.e. nearly half the global population expected ). This necessitates urgent actions to reduce stress on surface and ground water resources (UN-Water, 2018). Managed aquifer recharge is one of the foremost management tools to cope with water scarcity. It has multiple objectives, for instance to augment water supplies and reduce saltwater intrusion (Missimer et al, 2017). It is definitely on the rise after successful applications at many sites in the world
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