نتایج جستجو برای: site erosion

تعداد نتایج: 383275  

Journal: :Environmental Modelling and Software 2004
Roger Funk Edward L. Skidmore Lawrence J. Hagen

The Wind Erosion Prediction System (WEPS) is a process-based model that simulates daily weather and field conditions along with hourly wind speeds and erosion. Its physical basis should allow model application to regions outside the US for which it was originally developed. The objective of this study was to compare results from measured wind erosion with simulated soil losses as a first exampl...

Hoseini Keshtan, Reza, zamanifard, Ali, zamanifard, Mohammad Amin,

The ruins of impressive structure made by adobe known as the city of “Belgheis” is located 3 km from Esfarayen in the province of North Khorasan of Iran. The role of soil quality in the occurrence of damages to clay and adobe structures of Belqis area is the purpose of this research. Choosing the right soil is the first step in the preparation of adobe, Therefore, it is necessary to study the r...

2013
George Ashiagbor Eric K Forkuo Prosper Laari Raymond Aabeyir

Soil erosion involves detachment and transport of soil particles from top soil layers, degrading soil quality and reducing the productivity of affected lands. Soil eroded from the upland catchment causes depletion of fertile agricultural land and the resulting sediment deposited at the river networks creates river morphological change and reservoir sedimentation problems. However, land managers...

2011
Hari Prasad Neopane Ole Gunnar Dahlhaug Michel Cervantes

Sediment erosion not only reduces efficiency and life of hydropower turbines but also causes problems in operation and maintenance. Several factors are responsible for this erosion in hydro turbine components. This paper presents the sediment erosion types in hydraulic turbines and their components based upon an extensive literature review and the field observation at Cahua hydropower plant, Pe...

2004
Theresa M. Wynn Saied Mostaghimi James Burger Theo Dillaha

Riparian buffers are promoted for water quality improvement, habitat restoration, and stream bank stabilization. While considerable research has been conducted on the effects of riparian buffers on water quality and aquatic habitat, little is known about the influence of riparian vegetation on stream bank erosion. The overall goal of this research was to evaluate the effects of woody and herbac...

Journal: :تحقیقات جغرافیایی 0
هیمن شهابی کارشناسی ارشد جغرافیای طبیعی (ژئومورفولوژی)، دانشگاه تبریز شهرام روستایی گروه جغرافیای طبیعی، دانشگاه تبریز محمدحسین رضائی مقدم

abstract in current world environmental and mainly urban wastes are originated mostly from massive human habitat areas, and have caused disturbance, uncomfortable landscape, environmental risks and dissatisfaction. saqqez city with a population of 140000 is one of the largest cities in kurdistan province. due to population increase, consumptions and changes in nutritional habits of people, the ...

2011
Dirk Goossens Brenda Buck

Wind erosion measurements were carried out in Nellis Dunes Recreation Area, southern Nevada, USA. Gross erosion (the total mass of sediment effectively blown away from a surface), gross deposition (the total mass of sediment effectively depositing on a surface) and net erosion (the difference in sediment mass before and after an event) were measured for 1 year, on 17 different types of surfaces...

Journal: :Environmental Modelling and Software 2004
Robert Scott Van Pelt Ted M. Zobeck

In the United States, the USDA Natural Resources Conservation Service (NRCS) is the primary agency charged with the task of reducing wind erosion associated with production agriculture. The NRCS has used the Wind Erosion Equation (WEQ) (Woodruff and Siddoway, 1965) to assess the effects of field management on the potential for wind erosion for the last two and a half decades. The WEQ uses input...

2016
Jianlin Zhao Kristof Van Oost Longqian Chen Gerard Govers

Despite a multitude of studies, overall erosion rates as well as the contribution of different erosion processes on Chinese Loess Plateau (CLP) remain uncertain, which hampers a correct assessment of the impact of soil erosion on carbon and nutrient cycling as well as on crop productivity. In this paper we used a novel approach, based on field evidence, to reassess erosion rates on the CLP befo...

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