نتایج جستجو برای: runoff simulation

تعداد نتایج: 571549  

2007
Femke Reitsma Ralph Dubayah

This paper presents the implementation of a new data model for simulating watershed runoff. This data model, called nen, allows users to visualize and analyse the processes that are simulated in the watershed runoff model. It extends data models typically used in modelling watershed runoff, such as raster, that do not give direct insight into the spatial dynamics and distribution of the process...

2010
Gaku TANAKA

Responses of a runoff system with slope-length distribution have been studied in detail by many researchers. In those studies, rainfall input to the runoff system was considered a deterministic variable. However, rainfall input should be treated as a random process. In this paper, the Kinematic Wave model is used as a runoff system, and differential equationswhose solutions provide the firstto ...

1- INTRODUCTION According to the complexity of environmental factors related to erosion and runoff, correct simulation of these variables find importance under rain intensity domain of watershed areas.  Although modeling of erosion and runoff by Artificial Neural Network and Neuro-Fuzzy based on rainfall-runoff and discharge-sediment models were widely applied by researchers, scrutinizing Arti...

Journal: :مرتع و آبخیزداری 0
عطاالله کاویان استادیار دانشکده منابع طبیعی، دانشگاه علومکشاورزی و منابع طبیعی ساری، ایران علی آزموده دانش آموخته کارشناسی ارشد آبخیزداری، دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران کریم سلیمانی دانشیار دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران قربان وهاب زاده استادیار دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران

globally, soil erosion is one of the most important environmental problems which is threaten soil and water resources. soil properties are main parameters to affect runoff and soil erosion processes. so, this study was conducted to investigate the effects of some soil properties on runoff and soil erosion in the forest lands located in vicinity of sari city. rainfall simulator was set in 15 ran...

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...

Journal: :مهندسی زراعی 0
نسرین زلکی بدیلی دانش آموخته کارشناسی ارشد خاکشناسی، دانشکده کشاورزی، دانشگاه شهید چمران اهواز غلامعباس صیاد استادیار گروه خاکشناسی، دانشکده کشاورزی، دانشگاه دانشگاه شهید چمران اهواز کاظم حمادی عضو هیئت علمی سازمان آب و برق استان خوزستان سمیرا اخوان استادیار گروه علوم آب، دانشکده کشاورزی، دانشگاه بوعلی سینا همدان علی عبدی کارشناس ارشد خاکشناسی، گروه خاکشناسی، دانشکده مهندسی کشاورزی، دانشگاه رازی کرمانشاه

in iran, most mountainous watersheds do not have enough hydrometery stations and defective stations have sparse data. because of limited availability of hydrologic data, watershed modeling plays a crucial role in development of local resources. in this study, swat was applied to simulate runoff in marun dam (idanak) watershed, a sub-basin of marun catchment. calibration and sensivity analyses w...

2010
KARL-ERICH LINDENSCHMIDT MICHAEL RODE Michael Rode

This paper focuses on the integration of basin sediment transport with a physically-based hydrological model that links the water budget model WaSiM (Water Simulation Model) to the erosion model AGNPS__5. The results of the water budget simulation are then incorporated into the AGNPS_5 model to calculate sediment transport. The surface runoff calculated in WaSiM replaces the SCS curve number ru...

2004
Y. B. Liu F. De Smedt

A distributed hydrologic modeling and GIS approach is applied for the assessment of land use impact in the Steinsel sub-basin, Alzette, Grand-Duchy of Luxembourg. The assessment focuses on the runoff contributions from different land use classes and the potential impact of land use changes on runoff generation. The results show that the direct runoff from urban areas is dominant for a flood eve...

Journal: :Pest management science 2004
Qingli Ma R Don Wauchope Liwang Ma Kenneth W Rojas Robert W Malone Lajpat R Ahuja

The Root Zone Water Quality Model (RZWQM) is a comprehensive, integrated physical, biological and chemical process model that simulates plant growth and movement of water, nutrients and pesticides in a representative area of an agricultural system. We tested the ability of RZWQM to predict surface runoff losses of atrazine, alachlor, fenamiphos and two fenamiphos oxidative degradates against re...

Journal: :فیزیک زمین و فضا 0
مژگان یعقوبی گروه علوم و مهندسی آب، پردیس ابوریحان، دانشگاه تهران علیرضا مساح بوانی پردیس ابوریحان، دانشگاه تهران

arid and semi-arid regions of the world are confronted with limited water resources. a large part of iran is arid and semi-arid and rainfall in arid and semi-arid regions is typically meager, irregular and highly variable. this irregularity affects the hydrological cycle and water resources. investigating the hydrology of the arid and semi arid regions is essential to know this environment and ...

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