نتایج جستجو برای: river and reservoir sedimentation

تعداد نتایج: 16858691  

Journal: :Geomorphology RAS 2015

Journal: :Water Science & Technology: Water Supply 2022

Abstract The Yellow River (YR) is famous for its ‘hanging river’ due to the high sedimentation rate in lower reaches. Reservoir sediment retention (RSR) and water–sediment regulation (WSR) of Xiaolangdi (XLDR) contribute mitigating siltation adjusting bankfull channel geometry (LYR). However, few studies have been conducted quantify contribution RSR WSR medium-sized shaping. In this paper, we a...

ژورنال: علوم آب و خاک 2007
محمود شفاعی بجستان, , حسین صمدی بروجنی, , منوچهر فتحی مقدم, ,

Sedimentation and consolidation of cohesive sediments near the dam body can cause many problems such as clogging the bottom outlets and entering the sediments into the hydropower intakes. Flushing of these sediments through the bottom outlet will be successful only if the hydraulic conditions are designed according to the physical and mechanical properties of consolidated sediments. During the ...

Journal: :International Journal of Science and Engineering 2014

محمود شفاعی بجستان, , حسین صمدی بروجنی, , منوچهر فتحی مقدم, ,

Sedimentation and consolidation of cohesive sediments near the dam body can cause many problems such as clogging the bottom outlets and entering the sediments into the hydropower intakes. Flushing of these sediments through the bottom outlet will be successful only if the hydraulic conditions are designed according to the physical and mechanical properties of consolidated sediments. During the ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اصفهان - دانشکده زبانهای خارجی 1390

this thesis attempts to study the representations of the third-world intellectuals in three fictional works by the british-educated trinidadian nobel-winner v. s. naipaul: the mimic men, a bend in the river, and magic seeds. the first one recounts the story of ralph singh’s sense of alienation, his experiences as a colonial politician, and his struggle to give order to his disorderly world thro...

2002
M. K. GOEL SHARAD K. JAIN P. K. AGARWAL

A reservoir is an integral component of a water resources system. Periodic evaluation of the sediment deposition pattern and assessment of available storage capacity of reservoirs is an important aspect of water resources management. The conventional techniques of quantification of sediment deposition in a reservoir, such as hydrographie surveys and the inflow-outflow methods, are cumbersome, c...

Journal: :journal of agricultural science and technology 2010
s. m. hosseini b. zahraie

this study is focused on developing an integrated optimization-simulation based genetic algorithm model (iosga) to develop the operational policies for a multi-purpose reservoir system. the objective function of the optimization model is considered to be a linear function of reliability (rel), resiliency (res), and vulnerability (vul) of the river-reservoir system. genetic algorithm (ga) is emp...

2005
CHRISTOPHER J. PHILLIPS CAMPBELL S. NELSON

Lake Matahina, an 8 km long hydroelectric storage reservoir, is a small (2.5 km), 50 m deep, warm monomictic, gorge-type lake whose internal circulation is controlled by the inflowing Rangitaiki River which drains a greywacke and acid volcanic catchment. Three major proximal to distal subenvironments are defined for the lake on the basis of surficial sediment character and dominant depositional...

Journal: :آب و خاک 0
یوسف رمضانی مهدی قمشی

abstract turbidity current is one of the most important factors that effect the sediments distribution and also their transportation and release from reservoir. in this study, effects of these currents on sedimentation process in sefidroud dam were simulated by tcm model in 30 years period. comparison between the case of turbidity currents that reach to the dam wall and release from the reservo...

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