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Geosciences, Volume 10, Issue 3

March 2020 - 29 articles

Cover Story: Egypt is the land of dunes. Investigations of satellite images and field measurements show that nearly all dune forms can be observed. Longitudinal dunes and barchans prevail. The study reviews the state of knowledge around distribution, sizes, dynamics, and ages of all six sand seas (large areas with more than 50% dune coverage) and ten dune fields in Egypt. Regarding the sparse chronological data to date, for a reasonable estimation of future sand mobility in the course of global climate change, further data are essential. Finally, further studies concerning sand mobility, local wind systems, and land use are needed. View this paper
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Articles (29)

  • Article
  • Open Access
2 Citations
3,291 Views
13 Pages

A pile foundation in a permafrost region is in a negative-temperature environment, so concrete is affected by the negative temperature of the surrounding soil. It not only affects the formation of concrete strength but also leads to engineering quali...

  • Article
  • Open Access
17 Citations
4,020 Views
13 Pages

Hydraulic Conductivity and Pore Water Pressures in a Clayey Landslide: Experimental Data

  • Caterina Di Maio,
  • Jacopo De Rosa,
  • Roberto Vassallo,
  • Roberto Coviello and
  • Giuseppe Macchia

To analyze the response to hydrological conditions of an instable slope in a structurally complex clay formation, the hydraulic conductivity of the subsoil was estimated and pore water pressures were monitored. Two types of field tests were carried o...

  • Review
  • Open Access
28 Citations
19,669 Views
32 Pages

Sand Seas and Dune Fields of Egypt

  • Olaf Bubenzer,
  • Nabil S. Embabi and
  • Mahmoud M. Ashour

The article reviews the state of knowledge about distribution, sizes, dynamics, and ages of all sand seas (N = 6) and dune fields (N = 10) in Egypt (1,001,450 km2). However, chronological data (Optically Stimulated Luminescence, Thermoluminescence),...

  • Review
  • Open Access
12 Citations
5,889 Views
16 Pages

Hydroacoustic Mapping of Geogenic Hard Substrates: Challenges and Review of German Approaches

  • Svenja Papenmeier,
  • Alexander Darr,
  • Peter Feldens and
  • Rune Michaelis

Subtidal hard substrate habitats are unique habitats in the marine environment. They provide crucial ecosystem services that are socially relevant, such as water clearance or as nursery space for fishes. With increasing marine usage and changing envi...

  • Article
  • Open Access
26 Citations
4,319 Views
21 Pages

Characteristics of Surface Deformation in Lanzhou with Sentinel-1A TOPS

  • Yi He,
  • Wenhui Wang,
  • Haowen Yan,
  • Lifeng Zhang,
  • Youdong Chen and
  • Shuwen Yang

While surface deformations and their impact on buildings have been observed in the city of Lanzhou, it is difficult to find studies of surface deformation and the influential factors in the recent decades. This study was designed to detect the spatia...

  • Article
  • Open Access
4 Citations
4,098 Views
17 Pages

This paper presents an assessment of the potential usefulness of the Ground Conductivity Meter (GCM) method to locate seepage pathways in the Maniow levee zone near Kraków, Poland. We have realized this aim through geological recognition of th...

  • Article
  • Open Access
71 Citations
11,365 Views
29 Pages

Evaluating Rockfall Risk: Some Critical Aspects

  • Claudio Scavia,
  • Monica Barbero,
  • Marta Castelli,
  • Maddalena Marchelli,
  • Daniele Peila,
  • Giulia Torsello and
  • Gianmarco Vallero

Rockfalls evolve rapidly and unpredictably in mountain environments and can cause considerable losses to human societies, structures, economical activities, and also natural and historical heritage. Rockfall risk analyses are complex and multi-scale...

  • Comment
  • Open Access
5 Citations
3,462 Views
21 Pages

This note first summarizes the history of the manuscript “On a Continuum Model for Avalanche Flow and Its Simplified Variants” by Grigorian and Ostroumov—published in this Special Issue—since the early 1990s and explains the g...

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Geosciences - ISSN 2076-3263