Macro- micromorphological characteristics associated with high water table phenomenon at Atrice Village, Egypt [electronic resource].

Includes references.

The problem of high water table appeared in some areas at Atrice Village Giza Governorate was mainly due to inadequate drainage system and the drainage water from agricultural farms in the neighborhood. The aim of the present work is to study the effect of water table on macro and micromorphological features. The studied area could be classified into two soil units: Typic Haplotorrerts and Typic Calcitorrerts. Morphological studies should that the high water table level is 50 to 60cm depth, the soil structure is angular and subangular blocky, slickensides and cracks were observed in the deep layers. These criteria could be observed on the surface layer which forming hard blocks separated by wide cracks (about 3 em), many fissures were in surface and subsurface layers. Pedoformations appeared as gray mottling, some small iron concretions and some white precipitation of gypsum in the deep layers. In the same time the micromorphological features of these soils are characterized by porphyric related distribution and in some parts chitonic. Apedal soil materials and some parts have pedal in the surface layers, the pedality increase with depth. Planer voids (craze-skew planes) are the dominant over other types of voids such as metavughs, channels, chambers and compound packing voids. The ferruginous and manganiferous are dominant typical nodules, with different sizes and shapes. Calcite in diffuse micro crystalline nodules are scattered in the fine mass of surface and subsurface layers. In the same time the cutanic formations in some layers seem to be dark brownish neo-ferrans and neo-mangans around channels and planes particularly those separate the small peds, in addition to some carbonate hypocoating with iron, in the subsurface layers crystalline gypsum has regular lens shape as intercalary crystals and small crystal chambers.

Summary in Arabic.

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