نتایج جستجو برای: river beds

تعداد نتایج: 97771  

Journal: :تحقیقات مهندسی کشاورزی 0
سیدمجتبی رضوی نبوی دانشجوی دکتری سازه های آبی محمود شفاعی بجستان استاد هیدرولیک، دانشکده مهندسی و علوم آب، دانشگاه شهید چمران سیدمحمود کاشفی پور استاد هیدرولیک، دانشکده مهندسی و علوم آب، دانشگاه شهید چمران

grade control structures are hydraulic structures used to stabilize a river bed. scour downstream of this structure is the main cause of its failure. studies have developed numerous empirical relations for scour depth prediction that designers must choose between to decide the most effective equation for a specific application. this study tested the condition of submerged jets over beds of sedi...

2016
W. G. Pridmore

or as the ends of a boiv are drawn together." They have a legend that it visits the country every thirty years. The epidemic arrived in Bhamo in June last, having travelled up the Irrawaddy Yalley starting in Rangoon in May and visiting Mandalay during the early part of June. It is interesting to note this following of the important trade route. It is not unlikely that the epidemic originated f...

G. A. Barani, M. J. Khanjani and J. Ahmad- Auli,

In recent years, installation of plates in canal beds have been considered for sedimentation control and bed load reduction at canal intake. These planes, called submerged vanes, are different in dimensions. They are installed at intakes in-group with reasonable distance from each other. Presence of these vanes at intakes initiate transverse shear stress on river bed and causes sediment transpo...

G. A. Barani, M. J. Khanjani and J. Ahmad- Auli,

In recent years, installation of plates in canal beds have been considered for sedimentation control and bed load reduction at canal intake. These planes, called submerged vanes, are different in dimensions. They are installed at intakes in-group with reasonable distance from each other. Presence of these vanes at intakes initiate transverse shear stress on river bed and causes sediment transpo...

2012
Barbara P. Nash Michael E. Perkins

Sedimentary sequences in the Columbia Plateau region of the Pacific Northwest ranging in age from 16-4 Ma contain fallout tuffs whose origins lie in volcanic centers of the Yellowstone hotspot in northwestern Nevada, eastern Oregon and the Snake River Plain in Idaho. Silicic volcanism began in the region contemporaneously with early eruptions of the Columbia River Basalt Group (CRBG), and the a...

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