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- W2019990377 abstract "In the dryland of the Libertador General Bernardo O?Higgins Region in Chile, most farmers rely on wide and shallowhand-dug wells as their primary source of water during the dry summer. Few of these wells have sufficient yield formore than domestic use (human consumption, livestock, and irrigation of a subsistence garden). To more accuratelyassess available groundwater resources, saturated hydraulic conductivity (K) of aquifers in the eight counties thatcomprise this region?s dryland was estimated using evacuation and recovery tests in 353 hand-dug wells. K followeda log-normal distribution and ranged over nearly five orders of magnitude. County median K varied by a factor of5 and a slight increasing K trend in the southward direction. In one northern county, less than 4% of the sites hadK > 4 m d-1. In the t two southernmost counties, approximately one-quarter of the K values exceeded 4 m d-1. Thisis approximately the minimum K required for a typical well (1 m diameter and 3 m depth below the water table) toyield 1 L s-1 of water, which is roughly the yield required to irrigate 1 ha. Aquifers located where parent material waspredominantly intrusive granite had slightly higher and statistically significant K than those formed predominantly ofmetamorphic and sedimentary rock. A semi-variogram of K provided weak evidence of a characteristic length scaleof approximately 4 km." @default.
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- W2019990377 date "2011-06-01" @default.
- W2019990377 modified "2023-10-01" @default.
- W2019990377 title "Unconfined Aquifer Permeability near hand-dug Wells in the Coastal and Interior dryland of the Libertador General Bernardo O'Higgins Region, Chile" @default.
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- W2019990377 doi "https://doi.org/10.4067/s0718-58392011000200012" @default.
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