نتایج جستجو برای: erosion and sedimentation

تعداد نتایج: 16833835  

2003
Marian Muste Roger Gomez

An online database was designed and developed as an Iowa Highway Research Board project by the authors. Our database is intended for identifying and evaluating effective erosion and sedimentation control measures (ESCMs) for use in roadway construction throughout Iowa and elsewhere in the Midwest. The ESCM database is an efficient practical resource to aid state, county, and municipal engineers...

Soil erosion is an inevitable phenomenon that additive erosion caused Soil degradation. Additive Soil erosion is one of the major obstacles to achieve the development of agriculture and natural resources. Thus, knowledge of the status and trends of soil erosion and sediment production in the watersheds is one of the most important tools for planning and decision-making. Models are the most popu...

Journal: :Lithosphere 2022

Abstract The erosion of debris flows on the material source will affect movement and impact flow. This paper adopted coupled SPH-DEM-FEM to establish a complex dynamic model particle-fluid-erosion-structure flow assess sedimentation analyse response retaining structure strain-softening was simulate transformation body from solid state transition finally into liquid state. numerical analysis com...

2011
MAURICIO E. ARIAS KEITH S. LAWRENCE

The operation and longevity of hydropower dams are often negatively impacted by sedimentation. Forest conservation can reduce soil erosion, and therefore efforts to maintain upstream forest cover within a watershed contribute to the economic life span of a hydropower facility. The cost of forest conservation can be viewed as an investment in hydropower and be financed via a payment for ecosyste...

Journal: :اکو هیدرولوژی 0
مسعود عشقی زاده دانش‏ آموختۀ دکتری علوم و مهندسی آبخیزداری دانشگاه یزد محمد تقی دستورانی دانشیار، دانشکدۀ منابع طبیعی و کویر شناسی، دانشگاه یزد حمید رضا عظیم زاده استاد، دانشکدۀ منابع طبیعی و محیط زیست، دانشگاه فردوسی مشهد

in this research introduced the lapsus model as a runoff, erosion and sediment model in iran. this model for the first time has operatedin iran at kakhk paired catchment of gonabad. lapsus model is a landscape evolution model that can estimate the runoff, erosion and sediment at the four stage include: calculate the effective rainfall, runoff routing, calculate the capacity of sediment transpor...

Journal: : 2022

Efficiency of Watershed Management Measures on Erosion and Sedimentation Qarnaveh watershed, Golestan Province

2004

The Water Erosion Prediction Project (WEPP) is a physically based erosion model for applications to dryland and irrigated agriculture, rangeland, and forests. U.S. Forest Service (USFS) experience showed that WEPP was not being adapted because of the difficulty in building files describing the input conditions in the existing interfaces. To address this difficulty, a suite of Internet interface...

A. Salmanmahiny S. Abedian

Soil erosion and sedimentation processes can be considered as serious eco-environmentalproblems. This study aimed to estimate the basin-wide erosion using the Revised UniversalSoil Loss Equation (RUSLE). The soil erosion parameters included rainfall erosivity mapgenerated from the rainfall data, soil erodibility extracted from the soil map, land cover andmanagement map produced from supervised ...

2015
Lincoln F. Pratson

The objectives of this project are to: (1) Characterize the effect of spatial variations in deposition and erosion on the fluid flow, pore pressures and thus the stability of continental slope sediments. (2) Constrain the impact of individual turbidity currents on seafloor evolution. (3) Develop a technique for correlating stratigraphy complicated by spatial variations in sedimentation, erosion...

Journal: :تحقیقات مهندسی کشاورزی 0
امیر صمدی دانشجوی دکتری پردیس کشاورزی و منابع طبیعی دانشگاه تهران ابراهیم امیری تکلدانی استادیار پردیس کشاورزی و منابع طبیعی دانشگاه تهران حسن رحیمی استاد پردیس کشاورزی و منابع طبیعی دانشگاه تهران

riverbank erosion, land loss and associated sedimentation are river engineering and water resources management problems of global significance. the ability to predict riverbank stability on eroding rivers is the prerequisite of developing a channel width adjustment model and is essential for estimating riverbank erosion and associated sedimentation. in this research, a detailed model for stabil...

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