The rusle2 database and its rules and procedures are all used to describe a sitespecific condition and, given a description to estimate erosion. The rainfall erosivity factor calculator can be used to help determine if your small construction site qualifies for stormwater discharge waivers. Tillage erosion is described in terms of landscape erodibility and tillage erosivity. Lal c a department of agronomy, the pennsyloania state unioersity, 116 asi building, unioersity park, pa 168023504, usa b usdaarsnational soil erosion research laboratory, 1196 soil building, purdue unioersity. Rusle2 user ref guide submitted 051508sd purdue university. The amount of erosion will, therefore, depend upon the combination of the power of the rain to cause erosion and the ability of the soil to withstand erosion. Erosion prediction revised universal soil loss equation rusle the revised universal soil loss equation rusle is an easily and widely used computer program that estimates rates of soil erosion caused by rainfall and associated overland flow. Each class contains an approximately equal number count of features. It is dependent on the physical characteristics of rainfall, which include raindrop size, drop size distribution, kinetic energy, terminal velocity etc.
Method factsheet rusle revised universal soil loss. Rusle2 uses six factors for climatic erosivity, soil erodibility, slope length, slope steepness, covermanagement, and support practices to compute soil loss. Download our english dictionary apps available for both ios and android. Roles of soil erodibility, rainfall erosivity and land use. Erosivity definition of erosivity by medical dictionary. From technical guide to rusle use in michigan, nrcsusda state office of michigan. The main constraint encountered in the process of operating the gis is the calculation of the slope length factor l. Global rainfall erosivity esdac european commission.
Therefore, in future more advanced and certainly much more complicated processorientated models may become more important, models that simulate the processes of soil detachment, overland flow and sedimentation. Soil erodibility assessment for erosion management in. Erodability or erodibility is the inherent yielding or nonresistance of soils and rocks to erosion. The student materials are available for offline viewing below. Pdf the rainfall erosivity r and soil erodibility k factors of the universal soil loss equation usle were determined on two sites. A perspective and chinese experiences bin wang a,b, fenli zheng a,b. Microrelief characteristics control erodibility and erosivity. Soil erosion prediction using rusle for central kenyan. A high erodability implies that the same amount of work exerted by the erosion processes leads to a larger removal of material. Combined effects of soil erodibility, rainfall erosivity and land use on soil erosion. Gis data layers including, rainfall erosivity r, soil erodibility k, slope length and steepness ls, cover management c and conservation practice p factors are computed to determine their effects on average annual soil loss in the area. Predicting of soil erosion with regarding to rainfall erosivity and soil.
North carolina state university, 920 main campus dr. Soil erodibility is the inhere nature of soil, and each soil type has a unique value. Estimation of rainfall erosivity using 5 to 60minute fixed. Sustainability free fulltext evaluation of climatic. Method factsheet rusle revised universal soil loss equation. Please view the pdf by using the full text pdf link under view to the left. This factor also correlated with the siltfine sand soil population. The purpose of this study is to assess rainfall erosivity in europe in the form of the rusle rfactor, based on the best available datasets. Evaluation of annual rainfall erosivity index based on daily. A quantile classification is wellsuited to linearly. We discuss the implications to soil erosion control and sustainable development of chinas water resources in the 21. Erodibility definition and meaning collins english. Guy lefebvre, karol rohan, and, jeanpierre milette. The soil object includes information on soil erodibility, soil texture, hydrologic soil group, and rock cover.
Estimation of soil erosion risk using the universal soil. Refer to the usdanrcs soil survey manual for proce. The resulting value is called the rainfallrunoff erosivity factor, abbreviated with the letter r. Read roles of soil erodibility, rainfall erosivity and land use in affecting soil erosion at the basin scale, agricultural water management on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Sustainability free fulltext evaluation of climatic and. Erodibility and erosivity are important terms of the usle and their assessment is outlined in detail. Rainfall erosivity was calculated using data from rainfall gauging stations installed in the study area and the recommended method from. Erosivity is a measure of the potential ability of soil, regolith, or other weathered material to. Once provided with this set of data, t he rusle model links erosion factors influencing soil erodibility k factor, erosivity r facto r, land cover and management c factor, slope length l fact or and slope s factor. The results indicate that canadian structured clays are very resistant to erosion if intact and unweathered. Rainfall erosivity factor rfactor the rfactor represents the erosive force of. Download a pdf of all web pages for the student materials. Estimation of rainfall erosivity using 5 to 60minute fixedinterval rainfall data from china s.
Influence of soil erosion and conservation practices on. Scientists are certain that changes in climate and land use will affect the erodibility of soils and regoliths and also the erosivity of rainstorms nearing et al. These factors result in changes that render the soil susceptible to erosion and degradation and need to be considered in. Erosivity definition and meaning collins english dictionary. Pdf isolating erosivity and erodibility components in erosion by. In this article we will discuss about erosivity and soil erodibility. In this study it was attempted to quantify the changes of universal soil loss equation kfactor and its soil driving factors in three land uses including rangeland, rainfed farming, and orchards in babolrood watershed, northern iran. Garciaruiz, in badlands dynamics in a context of global change, 2018. The same holds for estimating plant cover and soil management effects on. Relationship between soil erodibility, rainfall erosivity. Soil erodibility is the possibilities of soil to detach and carried away during rainfall and runoff. Conceptually, rainfall erosivity is the capacity of rain to produce erosion, whereas soil erodibility is the susceptibility of the soil to be eroded.
Wanga a school of geography, beijing normal university, key laboratory of environmental change and natural disaster, ministry of education, beijing, china b usdaars, southwest watershed research center, united states. Estimation of soil erosion risk using the universal soil loss. Information is cataloged in the database according to a zone number. Soil science society of america journal abstract soilerodibility evaluations for soils on the runoff and erosion. Morgans b o o k does n o t examine the socioeconomic forces causing these increased risks, but coolly and analytically investigates the processes of soil erosion, emphasising the physical relationships between the factors of wind and rain erosivity and soil erodibility. Erodibility and erosivity soil erosion research methods taylor. Epa has updated its rainfall erosivity factor calculator to correct known problems and to use updated data from the natural resources conservation services nrcs revised universal soil loss equation, version 2 rusle2 database. The united states environmental protection agencys environmental monitoring and assessment program emap is conducting a study in the western united states. In the lushi basin, there are mainly four soil types.
The cfactor values were computed from existing cropping patterns in the catchment, including corn. In this study, we proposed a composite erodibility index dust occurrence ratio, dor and examined its interannual variation at a typical steppe site abagaqi in xilingol grassland, china, during spring of 1974. Potential impacts of climate change on rainfall erosivity and water availability in china in the next 100 years ge sun1, steven g. This paper proposes a new laboratory technique for the study of the erodibility of natural intact clays and presents results of a testing program on three canadian clays. Erodibility definition and meaning collins english dictionary. Assessing rainfall erosivity from monthly precipitation data. The erosivity of rainfall varies greatly by location. Estimation of rainfall erosivity using 5 to 60minute. The soil erodibility factor, k for the area is greater than 0.
This study will advance the science of ecological monitoring and demonstrate techniques for regionalscale assessment of the condition of aquatic resources in the western united states epa regions 8, 9, 10, and new mexico. Rainfall erosivity factor calculator water data and. Evaluation of annual rainfall erosivity index based on. Potential impacts of climate change on rainfall erosivity.
The effect of erodibility on dust occurrence remains poorly understood. The manner by which the soil erodibility factor is determined from plot data ensures that the longterm average annual soil. Erosioncontrol planners should consider information generated by rusle2 to be only one set of. Pdf rainfall erosivity and erodibility of inceptisols in the. Slopes in the catchment varied between 0 and 53% with steeper slopes having overall lsvalues of over 17. Rainfall erosivity factor calculator for small construction. Estimation of soil erosion for a sustainable land use. Results also show that the study area has high rainfall erosivity hence making it very susceptible to erosion. R rainfall erosivity factor, expressed by an average erosion index. By multiplying these factors, the me an relative soil loss in tons per hectare per year is calculated. Download our english dictionary apps available for both ios and. Rainfall erosivity factor calculator water data and tools. Soil science society of america journal abstract soilerodibility evaluations for soils on the runoff and erosion stations 1 view my binders. Human induced soil degradation and erosion are between the biggest environmental challenges of the xxi century.
It is defined as the potential ability of rain to cause the erosion. Learn more about using the different versions of integrate materials download a pdf of all web pages for the student materials. Thus, erosion is a function of the erosivity of the rain and the erodibility of the soil. Data have been collected from 1541 precipitation stations in all european union eu member states and switzerland, with temporal resolutions of 5 to 60 min. Because the mechanics behind erosion depend upon the competence and coherence of the material, erodability is treated in different ways depending on the type of. Microrelief characteristics control erodibility and erosivity, which will significantly influence wind erosion and dust emission. Soil erodibility assessment for erosion management in sokoto. Downloadable versions of the instructor materials are available from this location on the instructor materials pages. Potential impacts of climate change on rainfall erosivity and. Finally, for potential soil erosion risk map overlay analysis is performed on erodibility, erosivity and slope which is classified into low 05 index, moderate 511 index and.
Erosivity and erodibility in encyclopedia of environmental management. Approximately 70 percent of the erosivity occurs in the months of may, june, july and august in michigan. Factors c and p, related to human influence cover management and soil management, are. K soil erodibility factor for specific soil horizon. Erosivity definition of erosivity by the free dictionary. Difference between erosivity and erodibility soil erosion.
Using a hydrolgic model and an erosivity model, we predict how the two variables will change under future climate change conditions. Soil erosion by water is one of the major threats to soils in the north of morocco. Soil erodibility and rainfall erosivity are two important physical factors that affect the magnitude of soil erosion. Soil erodibility is an estimate of the ability of soils to resist erosion based on the physical characteristics of each soil. Aug 01, 2016 read roles of soil erodibility, rainfall erosivity and land use in affecting soil erosion at the basin scale, agricultural water management on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
Version 2 of the revised universal soil loss equation rusle2 estimates soil loss from rill and interrill sheet and rill erosion caused by rainfall and its associated overland flow. Erodibility and infiltration characteristics of five major. Wanga a school of geography, beijing normal university, key laboratory of environmental change and natural disaster. Erodibility and infiltration characteristics of five major soils of southwest spain s. Erodibility definition of erodibility by the free dictionary. Soil erodibility, rainfall erosivity and land use change. Rusle k values california state water resources control. Rainfall and runoff erosivity r factor student materials. Vulnerability of soil separates to detachment by water is described as soil erodibility by universal soil loss equation which can be affected by land use change. These student materials complement the a growing concern instructor materials. Data have been collected from 1,541 precipitation stations in all. Landscape erodibility is the propensity of a landscape to be eroded by tillage, and is a junction slope gradient. Because rainfall erosivity data is not available for download in an arcgis. Rusle2, like other mathematical models, uses a system of equations to compute erosion.
Mcnulty 2, jennifer moore2, corey bunch1, and jian ni3 1. Relationship between soil erodibility, rainfall erosivity and. An official website of the united states government. Soil science society of america journal abstract soil. Erosivity is the term used to describe the potential of raindrop impact, runoff from snowmelt.
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