نتایج جستجو برای: fluvial environment

تعداد نتایج: 521898  

Journal: :Environmental Modelling and Software 2011
Isnaeni M. Hartanto Lindsay Beevers Ioana Popescu Nigel G. Wright

XBeach is an open source, freely available two-dimensional code, developed to solve hydrodynamic and morphological processes in the coastal environment. In this paper the code is applied to ten different test cases specific to hydraulic problems encountered in the fluvial environment, with the purpose of proving the capability of XBeach in rivers. Results show that the performance of XBeach is ...

2009
M. G. Braioni M. C. Villani A. Braioni G. Salmoiraghi A. Locascio G. Cannata

The widespread urbanization of the corridor of the Sarno River has drastically modified the environment of this fluvial system. The aerial recognitions show that “the river continuum” was replaced by a continuum of town centres developed along the course of the Sarno River and its tributaries often on both banks. The urban and industrial building areas appear as a continuum and the agricultural...

2014
Chukwuemeka Frank

The Benin Formation is well exposed along the Atamiri River, which traverses Uli town, in the Niger Delta Basin of Southeastern Nigeria. Lithologic sections were measured, described and sampled so as to decipher the paleodepositional environment, using an integration of lithofacies data, pebble morphology, grain size and paleocurrent analysis. The lithofacies study suggests that the Benin Forma...

2012
Samuel C. Schon James W. Head Caleb I. Fassett

The presence of valley networks and open-basin lakes in the late Noachian is cited as evidence for overland flow of liquid water and thus a climate on early Mars that might have supported precipitation and runoff. Outstanding questions center on the nature of such a climate, its duration and variability, and its cause. Open basin lakes, their interior morphology, and their associated channels p...

2013
Jennifer L. Aschoff

In addition, one of the following statements should be included. Abstract The Piceance Basin, CO is a type locale for unconventional tight-gas sandstone in the Rocky Mountains (Law, 2002). Productive Williams Fork sandstones are extremely heterogeneous fluvial to marginal marine reservoirs that have very low permeability (<0.1 md) that typically require expensive hydraulic fracturing with 10-20...

Journal: :Frontiers in Environmental Science 2022

EDITORIAL article Front. Environ. Sci., 21 November 2022Sec. Freshwater Science https://doi.org/10.3389/fenvs.2022.1075282

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In the desert of Abarkoh Basin, Central Iran, the influence of playa-lake level fluctuations on recent sedimentation mode of a terminal ephemeral fluvial-fan system and adjacent lacustrine/aeolian sediments of a playa fringe environment has been investigated. The surface geomorphology-sedimentology and its relationship with shallow subsurface sediments along a >25 km transect, has been studied....

2005
Alan D. Howard Jeffrey M. Moore Irwin

[1] We present evidence that a final epoch of widespread fluvial erosion and deposition in the cratered highlands during the latest Noachian or early to mid-Hesperian was characterized by integration of flow within drainage networks as long as 4000 km and trunk valley incision of 50 to 350 m into earlier Noachian depositional basins. Locally deltaic sediments were deposited where incised valley...

2017
LAUREN A. EDGAR SANJEEV GUPTA DAVID M. RUBIN KEVIN W. LEWIS GARY A. KOCUREK RYAN B. ANDERSON JAMES F. BELL GILLES DROMART KENNETH S. EDGETT JOHN P. GROTZINGER CRAIG HARDGROVE LINDA C. KAH RICHARD LEVEILLE MICHAEL C. MALIN NICOLAS MANGOLD RALPH E. MILLIKEN MICHELLE MINITTI MARISA PALUCIS SCOTT K. ROWLAND JUERGEN SCHIEBER ROGER C. WIENS REBECCA M. E. WILLIAMS AMY J. WILLIAMS

This paper characterizes the detailed sedimentology of a fluvial sandbody on Mars for the first time and interprets its depositional processes and palaeoenvironmental setting. Despite numerous orbital observations of fluvial landforms on the surface of Mars, ground-based characterization of the sedimentology of such fluvial deposits has not previously been possible. Results from the NASA Mars S...

2009
J. L. Dickson C. I. Fassett J. W. Head

[1] Valley networks, regional drainage patterns suggesting liquid water stability at the surface, are confined to early in the history of Mars (the Noachian/Hesperian boundary and before), prior to a major climate transition to the hyperarid cold conditions of the Amazonian. Several later fluvial valley systems have been documented in specific Hesperian and Early Amazonian environments, and are...

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