نتایج جستجو برای: 2011 to simulate river flow

تعداد نتایج: 10826971  

Journal: :مرتع و آبخیزداری 0
حیدر ابراهیمی دانشجوی دکتری رشته علوم و مهندسی آبخیزداری، دانشگاه کاشان، ایران علیرضا مقدم نیا دانشیار گروه احیای مناطق خشک و کوهستانی، دانشکده منابع طبیعی، دانشگاه تهران، ایران حاجی کریمی دانشیار گروه مرتع و آبخیزداری، دانشکده کشاورزی، دانشگاه ایلام، ایران

the runoff simulation in a watershed provides insight on the processes affecting runoff generation and the stream flow characteristics like spatial and temporal variability of stream flow. this insight helps managers and planners in informed decision-makings on water resources management and planning. the objective of this study is to compare the performances of the complex swat model and the s...

2011
J. S. SANDERSON N. ROWAN T. WILDING B. P. BLEDSOE W. J. MILLER N. L. POFF

Growing water demand across the world is increasing the stress on river ecosystems, causing concern for both biodiversity and people. River‐specific environmental flow assessments cannot keep pace with the rate and geographic extent of water development. Society needs methods to assess ecological impacts of flow management at broad scales so that appropriate regional management can be implement...

Journal: :Hydrology 2021

Assessing the impact of climate change on streamflow is crucial for depicting vulnerability water resources and identifying proper adaptation measures. This study used Soil Water Assessment Tool (SWAT) to simulate El Kalb river, a major perennial river in Lebanon. The model performance was tested monthly flow at two stations under nine-year calibration period (2003–2011) four-year validation (2...

2011
Xiaoying Shi Jiafu Mao Peter E. Thornton Forrest M. Hoffman Wilfred M. Post

[1] We investigated how climate, rising atmospheric CO2 concentration, increasing anthropogenic nitrogen deposition and land use change influenced continental river flow over the period 1948–2004 using the Community Land Model version 4 (CLM4) with coupled river transfer model (RTM), a global river routing scheme. The model results indicate that the global mean river flow shows significant decr...

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In this study the advantages and importance of a numerical model to predict and monitor the processes governing hydraulic changes alluvial fan river is discussed. For this reason and because of the importance of flow velocity and shear stresses resulting from the erosion of the river, A two-dimensional numerical model to simulate the CCHE2D river changes ranging from Roodan River is used. In th...

2008
Hans J. Herrmann Hansjörg Seybold

A new model to simulate the time evolution of river delta formation process is presented in Ref.. It is based on the continuity equation for water and sediment flow and a phenomenological sedimentation/ erosion law. Different delta types are reproduced using different parameters and erosion rules. The model si capable to describe the subaerial and subaqueous growth of the delta front and the fr...

Journal: :The Science of the total environment 2014
Mathieu Cladière Céline Bonhomme Lauriane Vilmin Johnny Gasperi Nicolas Flipo Florence Habets Bruno Tassin

This study aims at modelling the daily concentrations of nonylphenolic compounds such as 4-nonylphenol (4-NP), nonylphenol monoethoxylate (NP1EO) and nonylphenoxy acetic acid (NP1EC) within the Seine River downstream of Paris City for over a year, firstly in the present state (year 2010) and for years 2050 and 2100 in order to assess the consequences of global change on the fate of nonylphenoli...

2016
Truong An Dang Tuan Hoang Tran

Numerical models are useful tools that play an important role in many research projects. Mike21C is one of the most well-established models for simulating a variety of processes, including bank erosion, bed level variations, aggradation, and degradation. Such processes are caused by a variety of activities, such as construction and dredging, as well as seasonal flow fluctuations. Mike21C based ...

ژورنال: علوم آب و خاک 2020

This study aimed to investigate the vulnerability of Sistan plain to fluctuations and Water Scarcity in Hirmand River using the vulnerability framework, by applying the resilience approach. The socioeconomic and biophysical components presented in this framework were embedded in a set of subsystems of the System Dynamics (SD) model. According to this, four levels of reference resilience were de...

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