نتایج جستجو برای: downstream control

تعداد نتایج: 1387774  

Journal: :journal of agricultural science and technology 2011
a. montazar s. isapoor

in the face of limited water resources, better utilization and operation of irrigation networks is essential. use of control systems is considered as one of the most assured ways to achieve the aim. in the course of the present study, two centralized controllers are applied to the west canal of aghili irrigation district in i. r. iran. the proposed control algorithms consist of a distant downst...

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...

Journal: :Journal of Hydraulic Engineering 1991

Journal: :journal of water sciences research 2013
s.m razavi nabavi m shafai bejestan

rade control structures are used to control bed erosion in steep small rivers mostly in the mountains. scour downstream of this structure can lead to failure. over the past years, the effect of different variables on this phenomena have been studied, however the effect of upward seepage which is common due to head difference of the banks water table or water surface level between the upstream a...

M Shafai Bejestan S.M Razavi Nabavi

rade control structures are used to control bed erosion in steep small rivers mostly in the mountains. Scour downstream of this structure can lead to failure. Over the past years, the effect of different variables on this phenomena have been studied, however the effect of upward seepage which is common due to head difference of the banks water table or water surface level between the upstream a...

A. Baghlani,

Optimum control of upstream pumping station in open channels with given constraint in downstream end is presented in this paper. The upstream control is capable of minimizing water level fluctuations in the channel in which the downstream pumping station causes an undesirable wave. The proposed method combines an unsteady non-uniform flow solver with shock-capturing capability, Fourier series a...

Journal: :Journal of Computer Science Applications and Information Technology 2016

Journal: :تحقیقات آب و خاک ایران 0
علی اصغر منتظر دانشیار، پردیس ابوریحان سعید عیسی پور کارشناس ارشد

because of a lack of means to match the traditional operating rules and regulations with time dependent variant of water needs in the present irrigation networks, a considerable portion of available water is wasted in these systems. this makes research on methods of operation and determination of types of controls as well as optimization approaches, attainable through using hydrodynamic models ...

Journal: :Journal of Geophysical Research: Earth Surface 2018

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