نتایج جستجو برای: braided river

تعداد نتایج: 85252  

Journal: :آب و خاک 0
سمیه پوربخشیان محمدرضا مجدزاده طباطبائی سید سعید موسوی ندوشنی شهرام منصوری

abstract morphological river models are designed to provide physical insight into the morphological response and to assist river engineers and managers in the design, operation and maintenance of river systems. here deterministic modeling weak for a dynamic and stochastic of nature river environment. specially, these could not predict the exact shape of the river bed, specially e.g. for braided...

جباری, ایرج, رضایی مقدم, محمدحسین, پیروزی نژاد, نوشین,

Rivers have different patterns of plan forms. Straight and meandering rivers have single channel but braided, anabranching and anastomosing rivers have multi channels. Gamasiab River in Kermanshah province has different plan forms of channels. In this study, historical method is used and is investigated different plan form and river's changes with using of aerial photography of 1955, 1969, 2003...

2015
Ziliang Liu Fang Shen Xiaomin Zhu Fengjie Li Mengqi Tan Vanesa Magar

A large, shallow braided river delta sedimentary system developed in the Yanchang Formation during the Triassic in the southwest of the Ordos basin. In this braided delta system, abundant oil and gas resources have been observed, and the area is a hotspot for oil and gas resource exploration. Through extensive field work on outcrops and cores and analyses of geophysical data, it was determined ...

2017
P. Huyghe J. L. Mugnier A. P. Gajurel B. Delcaillau PASCALE HUYGHE JEAN-LOUIS MUGNIER ANANTA PRASAD GAJUREL BERNARD DELCAILLAU

A multidisciplinary study was conducted on the section of the Siwalik Group sediments, approximately 5000 m thick, exposed along the Karnali River. Analysis of facies, clay mineralogy and neodymium isotope compositions revealed significant changes in the sedimentary record, allowing discussion of their tectonic or climatic origin. Two major changes within the sedimentary fill were detected: the...

2013
John D. Horn Robert M. Joeckel Christopher R. Fielding

This paper presents data compiled from aerial photography, General Land Office maps (GLOs), and discharge data from the central Platte River in Nebraska that quantify and provide a new understanding of channel evolution and abandonment in a braided stream. Analyses of aerial photographs and GLOs in ArcMapTM show that channel area decreased by an average of 46% from 1938 to 2006 and that channel...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2014
Meredith D Reitz Douglas J Jerolmack Eric Lajeunesse Angela Limare Olivier Devauchelle François Métivier

Water flowing over a loose granular bed organizes into a braided river, a network of ephemeral and interacting channels. The temporal and spatial evolution of this network of braided channels is not yet quantitatively understood. In ∼ 1 m-scale experiments, we found that individual channels exhibit a self-similar geometry and near-threshold transport conditions. Measurements of the rate of grow...

Journal: :رخساره های رسوبی 0
مهدی رضا پورسلطانی مصطفی معینی صالح

no-bahar watershed is located, south of khorasan razavi province. geologically, the study area is a part of central iran zone. the rock units are late mesozoic and cenozoic in age in this watershed. no-babhar watershed includes several channels, which among them, only two main channels, motr-abad and solh-abad, have been studied. these rivers are mostly, braided channel in style, with high grad...

2011
TÍMEA KISS

The Croatian-Hungarian border section of the Dráva River has been undisturbed for almost a century, and it is characterised by unique fluvial morphology (braided pattern and islands) supporting rich habitats and wildlife. However, during the last decades human impact became more and more intensive. Between 1975 and 1989 three water reservoirs were built on the Croatian section of the river, jus...

2017
Maarten Kleinhans Marc J. van Kreveld Tim Ophelders Willem Sonke Bettina Speckmann Kevin Verbeek

Drainage networks on terrains have been studied extensively from an algorithmic perspective. However, in drainage networks water flow cannot bifurcate and hence they do not model braided rivers (multiple channels which split and join, separated by sediment bars). We initiate the algorithmic study of braided rivers by employing the descending quasi Morse-Smale complex on the river bed (a polyhed...

2016
James J. Hsieh Emily H. Cheng

With the ever-increasing complexity of tumor heterogeneity (TH) discovered through cancer genome sequencing, it is apparent that TH has become the biggest hurdle for precision cancer therapeutics. Through studying the genomics of exceptional responders to targeted therapeutic agents in kidney cancer, we demonstrated parallel convergent gene/pathway/capability/function evolution of kidney cancer...

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