نتایج جستجو برای: kostiakov equation

تعداد نتایج: 229749  

Journal: :پژوهش آب در کشاورزی 0

infiltration and its modeling are important in design and implementation of irrigation projects, drainage, water-resources management, soil-conservation, hydrological studies, and artificial-recharge of groundwater and are influenced by different characteristics of soil and infiltrated water including the amount of salinity and sodium. the aim of this study was to evaluate the infiltration mode...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه مازندران - دانشکده ریاضی 1390

ابتدا تعاریف و مفاهیمی را که در این رساله مورد استفاده قرار می گیرد را بیان می کنیم. سپس به معرفی فضاهایی می پردازیم که با آن ها سر و کار خواهیم داشت. و‎‎‎‎‎ در پایان به معرفی چند قضیه و اصل می پردازیم. رده ای از دستگاه های بیضوی شبه خطی تباهیده ‎egin{equation*}‎ ‎left{egin{array}{ll}‎ -‎div (h_1 (x)| abla u|^{p-2} abla u )=lambda a(x)|u|^{p-2}u‎ +‎lambda b(x)|u|^{alpha-1}|v|^{eta+1}u+f...

Journal: :Water Practice & Technology 2022

Abstract Knowledge of soil infiltration characteristics is required increasingly for the proper design and efficient management irrigation. Various empirical physically based models have been used several years, but practical use many limited by parameter determination problems, which, in turn, are influenced factors acting at surface within soil, initial boundary conditions, etc. In this study...

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: :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...

Journal: :iran agricultural research 2015
m kazemi zadeh a.r sepaskhah

abstract- to study the effect of tree roots on increasing water infiltration in soil and also to determine and assess the coefficients of different infiltration models, some infiltration tests were performed in three tree plantation areas in badjgah, fars province with different soil textures (clay loam for pear plantation, sandy loam for grape plantation, loamy sand for pine trees). in each pl...

2005
P. B. Luz D. Heermann

There have been several proposals to evaluate potential runoff in center pivot irrigation, through the integration of time varying infiltration–precipitation rate curves, involving complex iterative procedures. Some methods use empirical infiltration functions, such as the Kostiakov equation. Others use physically based infiltration functions, such as the Green–Ampt equation. Another option is ...

Journal: :CIVED 2022

Pengujian infiltrasi yang dilakukan di daerah pengembangan permukiman dengan non Kecamatan Kuranji, Kota Padang, bertujuan untuk mengetahui berapa perbandingan nilai laju terdapat pada sudah dijadikan sebelum Padang. Metode digunakan penelitian ini adalah observasi dan pengumpulan data diambil langsung lapangan berupa uji belum menggunakan double ring infiltrometer. Prinsip pengujian mengamati ...

Journal: :Research, Society and Development 2021

Objetivou-se no presente estudo realizar uma análise comparativa do comportamento da infiltração de água solo em um plantio melancia (Citrullus lanatus (Thunb.) Matsum & Nakai). A área localiza-se Projeto Assentamento Ipiranga, sudeste paraense. Na aplicou-se o delineamento experimental inteiramente casualizado, com a utilização dois aneis cilindros (25 e 50 cm diâmetros cada 30 altura). Os...

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