نتایج جستجو برای: in the universal soil loss equation usle

تعداد نتایج: 21291602  

Journal: :Journal of environmental quality 2008
Kathleen B Boomer Donald E Weller Thomas E Jordan

The Universal Soil Loss Equation (USLE) and its derivatives are widely used for identifying watersheds with a high potential for degrading stream water quality. We compared sediment yields estimated from regional application of the USLE, the automated revised RUSLE2, and five sediment delivery ratio algorithms to measured annual average sediment delivery in 78 catchments of the Chesapeake Bay w...

Journal: :international journal of environmental research 2014
a.m. martínez-graña j.l. goy c. zazo

this paper presents a mapping procedure for risk mapping of water and wind erosion, whichhelps to identify protective measures needed in the planning and management of natural parks. the map of water erosion risk was developed by combining the original and revised universal soil loss equation methodologies (usle-rusle), and the map of wind erosion risk was developed using quirantes’ method. usi...

Journal: :international journal of environmental research 0
a.m. martínez-graña geology department, external geodynamics area, science faculty, university of salamanca, plaza merced s/n, (37008), salamanca, spain j.l. goy geology department, external geodynamics area, science faculty, university of salamanca, plaza merced s/n, (37008), salamanca, spain c. zazo national museum of natural sciences, section geology, street josé gutiérrez abascal no. 2. (28006), madrid, spain

this paper presents a mapping procedure for risk mapping of water and wind erosion, whichhelps to identify protective measures needed in the planning and management of natural parks. the map of water erosion risk was developed by combining the original and revised universal soil loss equation methodologies (usle-rusle), and the map of wind erosion risk was developed using quirantes’ method. usi...

2008
ZHANG Qingfeng YUAN Lifeng ANDREAS Marth

The paper has the goal to evaluate if the Universal Soil Loss Equation (USLE)applied using thematic paper maps and a DEM is sufficient to generate a model to map and predict the influences on the environment caused by soil erosion on Loess Plateau. Factors of USLE R, K, S, L, P as well as C were adapted to the test area, the Nihe Gou catchment in Chunhua County in Shaanxi. Afterwards the parame...

Journal: Desert 2012
A. Talebi F. Fotouhi H.R. Azimzadeh M. R. Ekhtesasi

One of the main factors of water erosion is the natural characteristics of the soil called "erodibility" or"detachability". The present study aims to analyze the variations of soil erodibility factor in different plains and thefactors related to it. Erodibility is one the key factors in some models of erosion and sediment such as Universal SoilLoss Equation (USLE), Revised USLE (RUSLE), and Mod...

Journal: :Int. J. Applied Earth Observation and Geoinformation 2010
Katrin Meusburger Nadine Konz Monika Schaub Christine Alewell

The focus of soil erosion research in the Alps has been in two categories: (i) on-sitemeasurements, which are rather small scale point measurements on selected plots often constrained to irrigation experiments or (ii) off-site quantification of sediment delivery at the outlet of the catchment. Results of both categories pointed towards the importance of an intact vegetation cover to prevent soi...

2007
Alexandre Marco da Silva Lilian Casatti Clayton Alcarde Alvares Aline Maria Leite Luiz Antonio Martinelli Steven F. Durrant

Soil loss expectation and possible relationships among soil erosion, riparian vegetation and water quality were studied in the São José dos Dourados River basin, State of São Paulo, Brazil. Through Geographic Information System (GIS) resources and technology, Soil Loss Expectation (SLE) data obtained using the Universal Soil Loss Equation (USLE) model were analyzed. For the whole catchment area...

2000
T. R. Nisar Ahamed K. Gopal Rao

To optimize the use of the available land and water resources of a watershed for sustainable agricultural production, soil erosion assessment and conservation are essential. The Universal Soil Loss Equation (USLE) is a widely accepted model (Wishmeier and Smith, 1965. Predicting Rainfall Erosion Losses from Cropland (Agricultural Handbook No. 282). USDA. Washington, D.C.) for assessing soil ero...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده فیزیک 1390

in this thesis, barium ferrite nano particles were prepared by sol-gel method. their structural and magnetic properties of samples have been investigated using thermo gravimetric analysis (tg-dta), x-ray powder diffractometer (xrd), fourier transform infrared (ftir), scanning electron microscopy (sem), field emission scanning electron microscopy (fesem), ac susceptometer, vibrating sample magne...

1998
B. Mitra H. D. Scott

There is a need in many emerging nations to develop simple methods for predicting areas of extensive soil erosion using imprecise, but real-world, input data at low cost with considerable Ž . accuracy. The objectives of this study are to 1 develop fuzzy logic models that predict soil Ž . erosion in a relatively large watershed using a limited number of input variables, 2 determine the Ž . effec...

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