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- W2894888207 abstract "The African Humid Period (AHP, ~15–5 ka) is the latest in a series of Saharan pluvials studied using carbonates. Evidence from desert paleolakes indicate that water tables rose across the region caused by increased precipitation during these wet periods and that this higher groundwater discharged at the surface creating a wetter environment beyond what increased seasonal precipitation could support alone. Carbonate cemented material and sediments have been noted at key archaeological sites such as Khartoum Hospital, and al-Khiday and at site distributions along Wadi Howar. In the deserts west of the Nile, extensive surface discharge of groundwater is the accepted generator of paleolakes and contributed to wadi flow. In contrast, studies in the Nile Valley have focused on the river itself as the source for any moisture to explain documented effects of a higher water table. Carbonate morphology and oxygen isotope composition of carbonate samples are used to develop a conceptual model demonstrating their accumulation in areas near the Nile River as a result of a regional rise in groundwater driven by greater precipitation. Morphological evidence shows a variety of formative environments at key topographic locations, indicating water availability above modeled contemporary Nile River flood levels. New results presented here from oxygen isotopes show locations dominated by evaporative enrichment at higher elevations, a transition to stable isotopic conditions at lower elevations, and ultimately a return to more enriched values at the lowest elevations that would have undergone intermixing of discharging groundwater and floodwater from the Nile. For areas beyond the river's flood extent or an associated river-fed alluvial aquifer, the only perennial moisture source capable of maintaining an isotopic equilibrium in a monsoonal climate would be groundwater. Results coincide with isotopic patterns and values observed in carbonates from studied paleolakes in the desert. This model provides an explanation for the carbonate accumulation at archaeological sites — while offering greater understanding of contemporary water availability for vegetation, animals, and human populations — and whether the Nile River functioned as the dominant water source for cultural groups in the valley during the early to mid-Holocene, as it did for the later agricultural populations." @default.
- W2894888207 created "2018-10-12" @default.
- W2894888207 creator A5036836790 @default.
- W2894888207 date "2019-04-01" @default.
- W2894888207 modified "2023-09-23" @default.
- W2894888207 title "Carbonates as evidence for groundwater discharge to the Nile River during the Late Pleistocene and Holocene" @default.
- W2894888207 cites W107214864 @default.
- W2894888207 cites W1114704372 @default.
- W2894888207 cites W1179296975 @default.
- W2894888207 cites W1520958396 @default.
- W2894888207 cites W185947152 @default.
- W2894888207 cites W1937482391 @default.
- W2894888207 cites W1964028410 @default.
- W2894888207 cites W1964077423 @default.
- W2894888207 cites W1965594650 @default.
- W2894888207 cites W1974503789 @default.
- W2894888207 cites W1980082876 @default.
- W2894888207 cites W1980222319 @default.
- W2894888207 cites W1983137130 @default.
- W2894888207 cites W1983975442 @default.
- W2894888207 cites W1985692991 @default.
- W2894888207 cites W1989512733 @default.
- W2894888207 cites W1990424855 @default.
- W2894888207 cites W1993258841 @default.
- W2894888207 cites W1994181440 @default.
- W2894888207 cites W1995572619 @default.
- W2894888207 cites W2003742392 @default.
- W2894888207 cites W2003768455 @default.
- W2894888207 cites W2005346607 @default.
- W2894888207 cites W2005403915 @default.
- W2894888207 cites W2011092337 @default.
- W2894888207 cites W2011456712 @default.
- W2894888207 cites W2017290792 @default.
- W2894888207 cites W2017755880 @default.
- W2894888207 cites W2019514199 @default.
- W2894888207 cites W2025679849 @default.
- W2894888207 cites W2029218313 @default.
- W2894888207 cites W2030943535 @default.
- W2894888207 cites W2032051744 @default.
- W2894888207 cites W2034119528 @default.
- W2894888207 cites W2035696990 @default.
- W2894888207 cites W2035794481 @default.
- W2894888207 cites W2036735850 @default.
- W2894888207 cites W2037751962 @default.
- W2894888207 cites W2038829521 @default.
- W2894888207 cites W2040180153 @default.
- W2894888207 cites W2040292102 @default.
- W2894888207 cites W2041261058 @default.
- W2894888207 cites W2045095553 @default.
- W2894888207 cites W2046296253 @default.
- W2894888207 cites W2048140682 @default.
- W2894888207 cites W2048630319 @default.
- W2894888207 cites W2048917179 @default.
- W2894888207 cites W2049399162 @default.
- W2894888207 cites W2051343527 @default.
- W2894888207 cites W2051644507 @default.
- W2894888207 cites W2054314118 @default.
- W2894888207 cites W2062442680 @default.
- W2894888207 cites W2066563040 @default.
- W2894888207 cites W2066675461 @default.
- W2894888207 cites W2067574185 @default.
- W2894888207 cites W2069656997 @default.
- W2894888207 cites W2078006404 @default.
- W2894888207 cites W2083967120 @default.
- W2894888207 cites W2086713404 @default.
- W2894888207 cites W2090836198 @default.
- W2894888207 cites W2092700258 @default.
- W2894888207 cites W2094408279 @default.
- W2894888207 cites W2102637245 @default.
- W2894888207 cites W2107358060 @default.
- W2894888207 cites W2121829211 @default.
- W2894888207 cites W2134831152 @default.
- W2894888207 cites W2142003303 @default.
- W2894888207 cites W2146451541 @default.
- W2894888207 cites W2152217964 @default.
- W2894888207 cites W2158814629 @default.
- W2894888207 cites W2163812493 @default.
- W2894888207 cites W2164257403 @default.
- W2894888207 cites W2218551825 @default.
- W2894888207 cites W2253499689 @default.
- W2894888207 cites W2282228094 @default.
- W2894888207 cites W2310763002 @default.
- W2894888207 cites W2327104572 @default.
- W2894888207 cites W2341713830 @default.
- W2894888207 cites W2347090548 @default.
- W2894888207 cites W2552876965 @default.
- W2894888207 cites W2557037773 @default.
- W2894888207 cites W2615316276 @default.
- W2894888207 cites W2766349152 @default.
- W2894888207 cites W2793453190 @default.
- W2894888207 cites W2834553514 @default.
- W2894888207 cites W4253606156 @default.
- W2894888207 cites W600127594 @default.
- W2894888207 cites W81505884 @default.
- W2894888207 cites W935048086 @default.
- W2894888207 doi "https://doi.org/10.1016/j.geomorph.2018.09.026" @default.
- W2894888207 hasPublicationYear "2019" @default.
- W2894888207 type Work @default.