نتایج جستجو برای: bedform
تعداد نتایج: 222 فیلتر نتایج به سال:
Large bedforms (dunes) are present in many shallow-water environments. Knowledge of their dimensions and dynamics is required for river coastal management. In tidal rivers estuaries, the interaction among hydrodynamics (which results from action flows), sediment transport bedform shape size complex. study, distribution morphology Weser Estuary, Germany, were investigated. Bedforms identified ba...
Buildings affect aeolian sediment transport and bedform development in sandy environments. Cellular automaton (CA) models have, however, only been used to simulate natural dynamics. This study extends a well-known CA model include dynamics around buildings, uses this explore the interaction of building-induced deposition erosion with New rules are introduced represent acceleration, deceleration...
s and PresentationsGallagher, E.L., Computer Simulations of Bedforms and Roughness in Tidal Inlets and River Mouths.Abstract and presentation at the AGU Ocean Sciences Meeting, New Orleans, LA, Feb 2016. Gallagher, E.L. , Prediction of Bedforms and Roughness in Steady, Tidal and Oscillatory Flows. Paperand presentation at the Marine and River Dunes Symposium, Caenarfon, Wales, April...
The Mars Science Laboratory rover Curiosity scooped samples of soil from the Rocknest aeolian bedform in Gale crater. Analysis of the soil with the Chemistry and Mineralogy (CheMin) x-ray diffraction (XRD) instrument revealed plagioclase (~An57), forsteritic olivine (~Fo62), augite, and pigeonite, with minor K-feldspar, magnetite, quartz, anhydrite, hematite, and ilmenite. The minor phases are ...
Wind blowing over sand on Earth produces decimeter-wavelength ripples and hundred-meter– to kilometer-wavelength dunes: bedforms of two distinct size modes. Observations from the Mars Science Laboratory Curiosity rover and the Mars Reconnaissance Orbiter reveal that Mars hosts a third stable wind-driven bedform, with meter-scale wavelengths. These bedforms are spatially uniform in size and typi...
Wind blowing over sand on Earth produces decimeter-wavelength ripples and hundred-meter- to kilometer-wavelength dunes: bedforms of two distinct size modes. Observations from the Mars Science Laboratory Curiosity rover and the Mars Reconnaissance Orbiter reveal that Mars hosts a third stable wind-driven bedform, with meter-scale wavelengths. These bedforms are spatially uniform in size and typi...
Abstract. Systematic identification and characterization of bedforms from bathymetric data are crucial in many studies fluvial processes. Automated accurate processing bed elevation is challenging where dune fields complex or irregular (especially) multiple scales co-exist. Here, we introduce a new tool to quantify properties representing large primary smaller superimposed secondary dunes. A fi...
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