Results 31 to 40 of about 118,568 (280)
Large eddy simulation of water flow over series of dunes
Water Science and Engineering, 2011 Large eddy simulation was used to investigate the spatial development of open channel flow over a series of dunes. The three-dimensional filtered Navier-Stokes (N-S) equations were numerically solved with the fractional-step method in sigma coordinates ...
Jun Lu +3 more
doaj +1 more source
Inferring Airflow Across Martian Dunes From Ripple Patterns and Dynamics
Frontiers in Earth Science, 2021 Large ripples form striking patterns on the slopes of martian sand dunes which can be mapped and tracked using high-resolution optical images. The ripples vary in orientation, wavelength, plan-view morphology, and rates of migration.
D. R. Hood +6 more
doaj +1 more source
Dune formation on the present Mars
, 2007 We apply a model for sand dunes to calculate formation of dunes on Mars under the present Martian atmospheric conditions. We find that different dune shapes as those imaged by Mars Global Surveyor could have been formed by the action of sand-moving winds
Eric J. R. Parteli +17 more
core +1 more source
Perspectives on conservation grazing: The need for monitoring and communication
Ecological Solutions and EvidenceConservation grazing is widely used to manage open ecosystems, but inconsistent definitions and inadequate reporting of grazing patterns hinder effective communication among researchers, practitioners and policymakers, limiting the understanding and ...
Jonathan Millett +9 more
doaj +1 more source
Cuadernos de Investigación Geográfica, 2021 This paper explores the relationship in three sedimentary systems of the Canary Islands (Spain) between four major land change processes (resource extraction, urbanization, tourism and nature protection) and six main environmental consequences (impacts ...
A.M. Santana Cordero
doaj +1 more source
Agribusiness, EarlyView.Abstract World markets for quality differentiated agri‐food products are highly competitive, presenting significant challenges for firms aiming to compete effectively. Government agencies and business organizations often implement various export promotion policies to address these challenges.
Nicolás Depetris‐Chauvin +1 more
wiley +1 more source
Morphological variation in atlas and axis of Neotropical spiny rats (Rodentia, Echimyidae)
The Anatomical Record, EarlyView.Abstract The unique morphologies of the first two cervical vertebrae, the atlas and axis, represent a significant innovation in mammalian evolution. These structures support the weight of the head and enable intricate movements of the head and neck.
Thomas Furtado da Silva Netto +3 more
wiley +1 more source
3D Dune Skeleton Model as a Coupled Dynamical System of 2D Cross-Sections
, 2010 To analyze theoretically the stability of the shape and the migration process of transverse dunes and barchans, we propose a {\it skeleton model} of 3D dunes described with coupled dynamics of 2D cross-sections.
Bishop S. R. +8 more
core +1 more source
Corridors of barchan dunes: stability and size selection [PDF]
, 2003 Barchans are crescentic dunes propagating on a solid ground. They form dune fields in the shape of elongated corridors in which the size and spacing between dunes are rather well selected. We show that even very realistic models for solitary dunes do not
A. Coursin +38 more
core +4 more sources
Archaeology in Oceania, EarlyView.ABSTRACT This paper reports on the excavation of a cache of stone artefacts, buried on the bank of a waterhole or ‘billabong’ in central western Queensland. This is an extremely rare find, and yet it is the second such site to be reported within less than a 10 km radius.
Yinika L. Perston +5 more
wiley +1 more source