Soil erodibility is the inhere nature of soil, and each soil type has a unique value. Factors c and p, related to human influence cover management and soil management, are. In the lushi basin, there are mainly four soil types. Difference between erosivity and erodibility soil erosion. Relationship between soil erodibility, rainfall erosivity and. Estimation of rainfall erosivity using 5 to 60minute. Garciaruiz, in badlands dynamics in a context of global change, 2018. 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. Sustainability free fulltext evaluation of climatic. Learn more about using the different versions of integrate materials download a pdf of all web pages for the student materials. Download our english dictionary apps available for both ios and android. Estimation of rainfall erosivity using 5 to 60minute fixedinterval rainfall data from china s.
Soil erodibility is an estimate of the ability of soils to resist erosion based on the physical characteristics of each soil. 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. These factors result in changes that render the soil susceptible to erosion and degradation and need to be considered in. This factor also correlated with the siltfine sand soil population. Conceptually, rainfall erosivity is the capacity of rain to produce erosion, whereas soil erodibility is the susceptibility of the soil to be eroded. The resulting value is called the rainfallrunoff erosivity factor, abbreviated with the letter r. R rainfall erosivity factor, expressed by an average erosion index. Soil erosion prediction using rusle for central kenyan. The cfactor values were computed from existing cropping patterns in the catchment, including corn. Method factsheet rusle revised universal soil loss equation. Wanga a school of geography, beijing normal university, key laboratory of environmental change and natural disaster. 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.
Potential impacts of climate change on rainfall erosivity and. The rusle2 database and its rules and procedures are all used to describe a sitespecific condition and, given a description to estimate erosion. Potential impacts of climate change on rainfall erosivity and water availability in china in the next 100 years ge sun1, steven g. 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. 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. Information is cataloged in the database according to a zone number. Potential impacts of climate change on rainfall erosivity. Global rainfall erosivity esdac european commission. 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. Sustainability free fulltext evaluation of climatic and. Because rainfall erosivity data is not available for download in an arcgis. Assessing rainfall erosivity from monthly precipitation data. Data have been collected from 1,541 precipitation stations in all.
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. North carolina state university, 920 main campus dr. An official website of the united states government. Microrelief characteristics control erodibility and erosivity.
Evaluation of annual rainfall erosivity index based on daily. Method factsheet rusle revised universal soil loss. The information in the storm erosivity object describes how erosivity varies during the year as a function of zones or regions. The erosivity of rainfall varies greatly by location. Rainfall erosivity factor calculator water data and. Evaluation of annual rainfall erosivity index based on. The soil object includes information on soil erodibility, soil texture, hydrologic soil group, and rock cover. In this article we will discuss about erosivity and soil erodibility.
A high erodability implies that the same amount of work exerted by the erosion processes leads to a larger removal of material. Download our english dictionary apps available for both ios and. Estimation of rainfall erosivity using 5 to 60minute fixed. Estimation of soil erosion for a sustainable land use. Human induced soil degradation and erosion are between the biggest environmental challenges of the xxi century. 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. Each class contains an approximately equal number count of features. The effect of erodibility on dust occurrence remains poorly understood. Pdf the rainfall erosivity r and soil erodibility k factors of the universal soil loss equation usle were determined on two sites.
The student materials are available for offline viewing below. Rainfall erosivity factor rfactor the rfactor represents the erosive force of. Tillage erosion is described in terms of landscape erodibility and tillage erosivity. Guy lefebvre, karol rohan, and, jeanpierre milette. The manner by which the soil erodibility factor is determined from plot data ensures that the longterm average annual soil. Soil erodibility and rainfall erosivity are two important physical factors that affect the magnitude of soil erosion. The rainfall erosivity factor calculator can be used to help determine if your small construction site qualifies for stormwater discharge waivers. Erodibility and erosivity soil erosion research methods taylor.
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. Estimation of soil erosion risk using the universal soil. Data have been collected from 1,541 precipitation stations in all european unioneu member states and switzerland, with temporal resolutions of 5 to 60 minutes. These student materials complement the a growing concern instructor materials. Soil science society of america journal abstract soil. Soil erodibility assessment for erosion management in sokoto. Soil erodibility assessment for erosion management in. Erosivity is a measure of the potential ability of soil, regolith, or other weathered material to.
The soil erodibility factor, k for the area is greater than 0. Influence of soil erosion and conservation practices on. Erodability or erodibility is the inherent yielding or nonresistance of soils and rocks to erosion. Combined effects of soil erodibility, rainfall erosivity and land use on soil erosion.
Roles of soil erodibility, rainfall erosivity and land use. We discuss the implications to soil erosion control and sustainable development of chinas water resources in the 21. Rainfall and runoff erosivity r factor student materials. The results indicate that canadian structured clays are very resistant to erosion if intact and unweathered. Rainfall erosivity factor calculator water data and tools. 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.
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. 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. Soil erodibility, rainfall erosivity and land use change. Relationship between soil erodibility, rainfall erosivity. Download a pdf of all web pages for the student materials. Rainfall erosivity was calculated using data from rainfall gauging stations installed in the study area and the recommended method from. K soil erodibility factor for specific soil horizon. Rusle2, like other mathematical models, uses a system of equations to compute erosion. Erosivity and erodibility in encyclopedia of environmental management. Erosivity definition of erosivity by medical dictionary.
The same holds for estimating plant cover and soil management effects on. 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. Erosioncontrol planners should consider information generated by rusle2 to be only one set of. By multiplying these factors, the me an relative soil loss in tons per hectare per year is calculated. 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. The main constraint encountered in the process of operating the gis is the calculation of the slope length factor l. Erodibility and infiltration characteristics of five major soils of southwest spain s. Soil erosion by water is one of the major threats to soils in the north of morocco. Using a hydrolgic model and an erosivity model, we predict how the two variables will change under future climate change conditions. Pdf isolating erosivity and erodibility components in erosion by. Soil science society of america journal abstract soilerodibility evaluations for soils on the runoff and erosion stations 1 view my binders.
Erosivity definition and meaning collins english dictionary. It is defined as the potential ability of rain to cause the erosion. Landscape erodibility is the propensity of a landscape to be eroded by tillage, and is a junction slope gradient. 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. From technical guide to rusle use in michigan, nrcsusda state office of michigan. 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. Refer to the usdanrcs soil survey manual for proce.
Soil science society of america journal abstract soilerodibility evaluations for soils on the runoff and erosion. Soil erodibility is the possibilities of soil to detach and carried away during rainfall and runoff. Downloadable versions of the instructor materials are available from this location on the instructor materials pages. Erodibility definition of erodibility by the free dictionary. A perspective and chinese experiences bin wang a,b, fenli zheng a,b. Rusle k values california state water resources control. Predicting of soil erosion with regarding to rainfall erosivity and soil. Erodibility and infiltration characteristics of five major. 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. Rusle2 user ref guide submitted 051508sd purdue university. A quantile classification is wellsuited to linearly. Erodibility and erosivity are important terms of the usle and their assessment is outlined in detail.
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. Mcnulty 2, jennifer moore2, corey bunch1, and jian ni3 1. Microrelief characteristics control erodibility and erosivity, which will significantly influence wind erosion and dust emission. Erosivity definition of erosivity by the free dictionary. Estimation of soil erosion risk using the universal soil loss.
Pdf rainfall erosivity and erodibility of inceptisols in the. 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. Erosivity is the term used to describe the potential of raindrop impact, runoff from snowmelt. 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. Please view the pdf by using the full text pdf link under view to the left. Results also show that the study area has high rainfall erosivity hence making it very susceptible to erosion. 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. The united states environmental protection agencys environmental monitoring and assessment program emap is conducting a study in the western united states.
Rusle2 uses six factors for climatic erosivity, soil erodibility, slope length, slope steepness, covermanagement, and support practices to compute soil loss. It is dependent on the physical characteristics of rainfall, which include raindrop size, drop size distribution, kinetic energy, terminal velocity etc. 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. Slopes in the catchment varied between 0 and 53% with steeper slopes having overall lsvalues of over 17. Approximately 70 percent of the erosivity occurs in the months of may, june, july and august in michigan.
1605 1161 997 687 484 1206 909 338 1469 49 1551 931 824 1029 1536 61 196 372 877 1070 719 505 486 607 905 832 764 633 792 545 377 1101 1214