Anthropogenic basin closure and groundwater salinization (ABCSAL)
نویسندگان
چکیده
Global food systems rely on irrigated agriculture, and most of these in turn depend fresh sources groundwater. In this study, we demonstrate that groundwater development, even without overdraft, can transform a fresh, open basin into an evaporation dominated, closed-basin system, such the groundwater, rather than exiting via stream baseflow lateral subsurface flow, exits predominantly by evapotranspiration from lands. newly closed hydrologic basins, just as other salinization is inevitable because dissolved solids cannot escape, effectively converted salt sink. We first provide conceptual model process, called “Anthropogenic Basin Closure SALinization” (ABCSAL). examine temporal dynamics ABCSAL using Tulare Lake Basin, California, case study for large agricultural region with Mediterranean climate, overlying unconsolidated sedimentary aquifer system. Even modern water management practices arrest historic results indicate shallow aquifers (36 m deep) exceed maximum contaminant levels total decadal timescales. Intermediate (132 m) deep (187 m), essential drinking crops, are impacted within two to three centuries. Hence, resulting development constitutes largely unrecognized constraint sustainable yield similar timescales depletion poses serious challenge quality sustainability, when stable. Results suggest agriculturally intensive basins worldwide may be susceptible ABCSAL.
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ژورنال
عنوان ژورنال: Journal of Hydrology
سال: 2021
ISSN: ['2589-9155']
DOI: https://doi.org/10.1016/j.jhydrol.2020.125787