Arid environment and land classification of the South Valley, Toshka (Western Desert, Egypt)

Vogg, R.; Wehmeier, E.

doi:10.1016/s0140-1963(18)31267-9

Cited by 8 publications

(2 citation statements)

References 1 publication

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“…Soils have only one horizon, arbitrarily termed 'A' horizon forming recent soils "Entisols" and lying over a rocky basement. Texture analysis reveals their sandy nature with high water permeability, hence they are classified as Psamments (Vogg and Wehmeier, 1985).…”

Section: Introductionmentioning

confidence: 99%

Soil Genesis and Uniformity of Wadi Al-Queh, Al-Quseir, Red Sea Coast, Egypt

Khalifa

Elwan²

2016

Alexandria Journal of Agricultural Sciences

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Red Sea coastal zone within the "Golden Triangle" national project is brought out as promising agrarian expansion. Wadi Al-Queh is one of the drainage basins located east of Red Sea Mountains with buoyancy water and soil resources.Current study aimed at investigating soils of wadi Al-Queh with respect to their genesis and degree of homogeneity based on the mineralogical analysis. Four landforms were recognized running east to west namely; bajada plain, wadi terraces, mid-stream wadi course and piedmont plain. Twenty nine soil samples were selected representing eight georeferenced profiles to embody all variations in the different landforms. To recognize the prevailing depositional environmental conditions, samples were subjected to granulometric analysis for the sand fraction. Heavy and light minerals of fine sand fraction were estimated. The uniformity ratios among resistance minerals of zircon, rutile, and tourmaline were calculated. Weathering ratios (Wr1, Wr2, and Wr3) between the non-resistance and resistance minerals were used as criteria for investigating parent materials uniformity and consequently the degree of soil development. Obtained results revealed the dominance of quartz with 89.15-98.85% of the total light minerals. Opaque minerals are composed essentially by iron oxides in the range 37.75-71.25% of the total heavy minerals. Frequencies of transparent minerals indicate the contribution of igneous, metamorphic and sedimentary sources in soil derivation at whole landforms. They were mostly derived from Nubian sandstone, limestone, conglomerate, breccia, granite, basalt, and schist during Tertiary to Recent ages. Obvious heterogeneous distribution of calculated weathering and uniformity ratios with depth depicted that most of the studied soils were poorly sorted, poorly developed and mostly composed of more than one parent material under multi-depositional environments conditions with non-uniform in nature. Water as the major erosional agent contributes in rifting the wadi paths between mountainous blocks towards east direction. Weathered materials from igneous, sedimentary and metamorphic sources were deposited to form a great outwash plain in which the soils under consideration were stratified. In conclusion, it is quite clear that soils of wadi Al-Queh represented an apparent discontinuity or a type of irregular interstratifications due to geogenetic weathering, mostly related to a multi-origin and/or multi depositional regime.

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Section: Introductionmentioning

confidence: 99%

Soil Genesis and Uniformity of Wadi Al-Queh, Al-Quseir, Red Sea Coast, Egypt

Khalifa

Elwan²

2016

Alexandria Journal of Agricultural Sciences

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“…Moving southward, the annual rainfall becomes just a few millimetres near El-Kharga and El-Dakhla Oases at the south (Goudie 2002). Daily temperatures reach 42°C during summer with potential evapotranspiration rates of 14-15 mm/day (Vogg and Wehmeier 1985). However, this part of the Sahara Desert witnessed a number of dry-wet cycles during the Quaternary (Le Houerou 1997) and there is geographical, geological, and archaeological evidence of wetter climates in the past (El-Baz et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Sand movement patterns in the Western Desert of Egypt: an environmental concern

Hereher

2009

Environ Earth Sci

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Wind action is the most dominant agent for erosion and deposition in the vast Western Desert of Egypt. Analysis of wind data from seven meteorological stations distributed along the Western Desert reveals that this desert is characterized by high-energy wind environments along the northern and southern edges and low-energy wind environments throughout the rest of the desert. Accordingly, sand drift potential follows the pattern of wind energy. Maximum sand drift potential was observed at the southern edge (571 vector units, which equals 40 m 3 /m width/year). Sand drift direction was observed towards the southeast except at the southern part of the desert where the trend of sand movement was towards southwest. The major dune type recognized on satellite images was the simple linear type. Linear dunes are generally associated with bimodal wind regime. Rates of sand drift potential and sand dune migration were greatest at East of Owinate region at the extreme southern part of the desert. Measurements of crescentic sand dune advance from two satellite images reveal a maximum advance rate of about 9 m/year at the southern part of the desert. Dune movement creates potential hazard to the infrastructures in this open desert.

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Effects of land use/cover change on regional land surface temperatures: severe warming from drying Toshka lakes, the Western Desert of Egypt

Hereher

2017

Nat Hazards

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Arid environment and land classification of the South Valley, Toshka (Western Desert, Egypt)

Cited by 8 publications

References 1 publication

Soil Genesis and Uniformity of Wadi Al-Queh, Al-Quseir, Red Sea Coast, Egypt

Soil Genesis and Uniformity of Wadi Al-Queh, Al-Quseir, Red Sea Coast, Egypt

Sand movement patterns in the Western Desert of Egypt: an environmental concern

Effects of land use/cover change on regional land surface temperatures: severe warming from drying Toshka lakes, the Western Desert of Egypt

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