نتایج جستجو برای: infiltration models

تعداد نتایج: 956891  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم انسانی 1389

rivers and runoff have always been of interest to human beings. in order to make use of the proper water resources, human societies, industrial and agricultural centers, etc. have usually been established near rivers. as the time goes on, these societies developed, and therefore water resources were extracted more and more. consequently, conditions of water quality of the rivers experienced rap...

Journal: :Open Journal of Soil Science 2021

The quantification of soil infiltration is necessary for the estimation water accessibility in soils plant growth and development. Field tests runs were conducted on agricultural three irrigation sites Northern Ghana. field data fitted into Green Ampt, Kostiakov, Philip, Holtan, Soil Conservation Service Horton models determination unknown model parameters. Regression analysis at 95% confidence...

Journal: :journal of rangeland science 2014
reza kavandi habib gholamali heshmati hamid siroosi

interrupting the processes which control ecosystem resources has dramatic impacts on the rangeland conditions. to protect ecosystems and landscape, it needs to understand the ecosystem processes which regulate the ecosystem resources. as main components of ecosystems, patches and inter-patches play important roles in energy and materials cascade. ecologically, functional parameters such as stab...

Journal: :iranian journal of environmental sciences 0
husna takaijudin river engineering and urban drainage research centre (redac), engineering campus, universiti sains malaysia, seri ampangan, 14300 nibong tebal, penang, malaysia aminuddin ab ghani river engineering and urban drainage research centre (redac), engineering campus, universiti sains malaysia, seri ampangan, 14300 nibong tebal, penang, malaysia nor azazi zakaria river engineering and urban drainage research centre (redac), engineering campus, universiti sains malaysia, seri ampangan, 14300 nibong tebal, penang, malaysia

bioretention or rain garden is a preferable low impact development (lid) approach due to its characteristics which reflect natural water cycle processes. however, this system is still little understood and quite complicated in terms of design and implementation due to many technical considerations. hence, this paper gives a review of the challenges and developments for the use of bioretention f...

2010
William C. Lucas

This article presents the elements involved in the design of a bioretention planter/trench infiltration-detention system as part of a very large-scale urban retrofit project. The prototype system was designed to intercept all of the runoff from a synthetic 5.08-mm 24-h rainfall event. Diverted flows were conveyed into bioretention planter for treatment. The bioretention systems were fingerprint...

Journal: :Water 2022

The variation in moisture content between subsequent irrigations determines the use of infiltration equations that contain representative physical parameters soil when irrigation begins. This study analyzes reliability hydrodynamic model to simulate advanced phase border irrigation. For solution model, a Lagrangian scheme implicit finite differences is used, while for infiltration, Kostiakov eq...

ژورنال: علوم آب و خاک 2009
بونر, کریستینا, قضاوی, غلامرضا, قوی, استفان, میرزایی, محمدرضا,

At present, soil surface characteristics (SSC) are recognised as key parameters controlling infiltration rates, runoff generation and erosion. Microtopography of surface among SSC is the main one. The work presented in this paper is based on a set of digital elevation models (DEMs) supplied by two different methods: Laser roughness-meter and photogrammetry method. We used two maquettes. The use...

Journal: :آب و خاک 0
علی جوادی محمود مشعل حامد ابراهیمیان

infiltration is a complex process that changed by initial moisture and water head on the soil surface. the main objective of this study was to estimate the coefficients of infiltration equations, kostiakov-lewis, philip and horton, and evaluate the sensitivity of these equations and their coefficients under various initial conditions (initial moisture soil) and boundary (water head on soil surf...

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