Results 21 to 30 of about 4,250 (222)

An experimental study on the optimal compositions of ordinary concrete based on corrected dune sand—Case of granular range of 25 mm

open access: yesCase Studies in Construction Materials, 2021
Our study aims to solve the fundamental problem of concrete formulation in arid areas. The obtained results through the use of dune sand showed that most of previous studies in this domain did not meet the requirements- in terms of mechanical strength of
Abderrahmane Moulay-Ali   +2 more
doaj   +1 more source

Numerical simulation of wind field and sand flux in crescentic sand dunes

open access: yesScientific Reports, 2021
Sand flux is the key factor to determine the migration of sand dunes and the erosion to the surrounding environment. There are crescent-shaped sand dunes of various scales in the desert, and there are significant differences in spatial wind field and ...
Huiwen Zhang   +5 more
doaj   +1 more source

BEARING CAPACITY OF SHALLOW FOOTINGS RESTING ON DUNE SAND

open access: yesJournal of Engineering, 2023
As a result of the growth of economic, demographic and building activities in Iraq, that necessitates carrying out geotechnical investigations for the dune sand to study behavior of footings resting on these soils.
Bushra S. Albusoda, Lubna A. Kh. Salem
doaj   +1 more source

Nett Present Value (NPV) analysis for projection of feasibility of Coastal Sand Dune Tourism in Parangtritis Village

open access: yesE3S Web of Conferences, 2019
Sand dune in Parangtritis Village has a speciality of being formed in humid climates (tropical). The initiation of Barchan Sand Dune as a new tourism based on eco-tourism has to consider many aspects to maintain sustainability of sand dune. It needs some
Dwiputra Dicky Satria   +6 more
doaj   +1 more source

Monitoring the Dynamics of Formby Sand Dunes Using Airborne LiDAR DTMs

open access: yesRemote Sensing, 2021
Coastal dunes play an important role in coastal erosion risk management, where they act as a dynamic natural sea defence line. Formby coast is part of the Sefton coast in the Northwest of England and is one of the largest and most rapidly evolving sand ...
Ahmed Mutasim Abdalla Mahmoud   +4 more
doaj   +1 more source

Sand Seas and Dune Fields of Egypt

open access: yesGeosciences, 2020
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), used
Olaf Bubenzer   +2 more
doaj   +1 more source

Exceptional preservation informs the paleobiology of tapinocephalid dinocephalians

open access: yesThe Anatomical Record, EarlyView.
Abstract The tapinocephalid dinocephalian Moschops is one of the most iconic taxa of the middle Permian, yet its paleobiology remains one of the least well‐known. Here, we address some aspects of paleoneurology and paleobiology of Moschops using CT scanning of four well preserved skulls from the upper Abrahamskraal Formation of South Africa. Two of the
Julien Benoit   +6 more
wiley   +1 more source

Study on Sand-Accumulation Changes of Highway and Formation Mechanism of Sand Damage in Drifting Dunes Areas

open access: yesApplied Sciences, 2022
After the construction of desert highway, the physiognomy changes caused by surface wind erosion and accumulation not only seriously threaten the stability of road structure, but also have a tremendous impact on the safety of the highway operation and ...
Feng Han   +4 more
doaj   +1 more source

Leveraging Big Multitemporal Multisource Satellite Data and Artificial Intelligence for the Detection of Complex and Invisible Features: The Case of Extensive Irrigation Mapping

open access: yesArchaeological Prospection, EarlyView.
ABSTRACT The detection of buried or obscured archaeological features remains a central challenge in landscape archaeology, particularly in the irrigated floodplains of Mesopotamia where levees and canals formed the basis of complex agrarian systems. This study presents a deep learning–based approach for the large‐scale, automated detection of ancient ...
Nazarij Buławka   +4 more
wiley   +1 more source

A new GIS-based model for automated extraction of Sand Dune encroachment case study: Dakhla Oases, western desert of Egypt

open access: yesEgyptian Journal of Remote Sensing and Space Sciences, 2012
The movements of the sand dunes are considered as a threat for roads, irrigation networks, water resources, urban areas, agriculture and infrastructures.
M. Ghadiry, A. Shalaby, B. Koch
doaj   +1 more source

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