نتایج جستجو برای: river and reservoir sedimentation

تعداد نتایج: 16858691  

2010
Simon Munier Julien Lerat Gilles Belaud Xavier Litrico

The article proposes a model for integrated management of a regulated watershed. In such systems, it is important to take into account not only the discharge released at the reservoir, but also the natural flows due to rainfall. The proposed model incorporates both inputs, and can be refined by considering different numbers of sub-basins corresponding to tributaries of the river. We discuss the...

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2004
S M Casanova R Henry

Longitudinal changes in composition, abundance, and distribution of copepods were studied at the transition zone of Paranapanema River-Jurumirim Reservoir (SP, Brazil). The interchange of biotic material between marginal lakes and the river system was also examined. Water samples were obtained from 6 stations along a stretch of 13 km of the Paranapanema River, from an upstream reach with high w...

2018

The processes of sediment transport, scour, and deposition in an alluvial channel are extremely complex. Theoretical developments of sediment transport functions for different flow and sediment conditions are based on assumptions of different degrees of complexity [1]. Some of the simplified assumptions are based on idealized laboratory conditions that may not be true for the much more complica...

Journal: :مرتع و آبخیزداری 0
اصغر زارع چاهوکی دانشجوی دکتری آبخیزداری دانشگاه یزد علی سلاجقه دانشیار دانشکدة منابع طبیعی دانشگاه تهران محمد مهدوی استاد دانشکدة منابع طبیعی دانشگاه تهران شهرام خلیقی سیگارودی استادیار دانشکدة منابع طبیعی دانشگاه تهران سعید اسدی کارشناس مرکز تحقیقات هواشناسی کاربردی استان یزد

a flow-duration curve (fdc) illustrates the relationship between the frequency and magnitude of streamflow. applications of fdc are of interest for many hydrological problems related to hydropower generation, river and reservoir sedimentation, water quality assessment, water-use assessment, water allocation and habitat suitability. this study was carried out in 11 selected watersheds with commo...

2018

The processes of sediment transport, scour, and deposition in an alluvial channel are extremely complex. Theoretical developments of sediment transport functions for different flow and sediment conditions are based on assumptions of different degrees of complexity [1]. Some of the simplified assumptions are based on idealized laboratory conditions that may not be true for the much more complica...

Journal: :Water 2023

Water supply systems that use rivers with high sedimentation levels may experience issues such as reservoir siltation. The suspended sediment concentration (SSC) of experiences interannual variation and nonlinearity due to its close relationship meteorological factors, which increase the mismatch between river water source urban demand. raw system scheduling problem is expressed a pump station ...

2007

The ecological forecasting of microorganisms and water quality dynamics in Krasnoyarsk reservoir is based on knowledge of dependence of specific growth rate (SGR) on limiting substrata. It investigated the influence of soil extract on the growth autochtonic bacterioplankton of Krasnoyarsk reservoir. The maximum SGR and Michaelis-Menten constant (on chemical oxidation decomposition (COD) permang...

Journal: :Sustainability 2023

Soil erosion is a complex process that results in soil and fertility losses from agricultural land and, ultimately, leads to river sedimentation. This study aimed assess various influential factors processes affecting recommend suitable site-based Erosion Control Measures (SECM) for sustainable agriculture while minimizing the downstream rivers reservoir sedimentation Sebeya watershed of Rwanda...

Journal: :مرتع و آبخیزداری 0
محبوبه حاجی بیگلو دانش آموختة کارشناسی ارشد آبخیزداری دانشکدة منابع طبیعی یزد محمدتقی دستورانی دانشیار دانشکدة منابع طبیعی و محیط زیست دانشگاه فردوسی مشهد عباسعلی قزل سوفلو استادیار گروه عمران دانشگاه آزاد اسلامی، واحد مشهد محمد رضا اختصاصی دانشیار دانشکدة منابع طبیعی دانشگاه یزد

the morphology of a river system is affected by dominant watershed processes includingclimatic, hydrologic, hydraulic, erosion and sedimentation, geological and topographicalcharacteristics of the river environment and watershed. understanding the interaction betweenthe river form and dominant watershed processes in river systems is necessary for recognitionof river behavior and of importance f...

هاشمی, سید علی اصغر , عرب خدری, محمود ,

  In order to quantitatively evaluate the sediment yield in ungauged basins, it is necessary to use empirical models. The EPM model, as a model which is using in Iran, has sometimes been evaluated. Most evaluations have often been conducted by using river's sediment information and direct measurements of dam reservoir sedimentation have been less used, while the sediment measurement method on r...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید