Estimating sheet and rill erosion the revised universal soil loss equation version 2 rusle2 is used to estimate interrill sheet and rill erosion caused by water. Rusle parameters were assessed using satellite remote sensing rs and gis with a view to model soil erosion in champabati watershed in assam. The methodology to perform this first paneuropean estimate of the total soil loss due to crop harvesting rests on crop statistics aggregated at regional and national level and soil texture data obtained through the interpolation of ca. The total soil loss from agricultural land was estimated to be 10 million t in 1990 and 14 million t in 2010. But, in the highlands of ethiopia, annual soil loss reaches up to 200 300 ton per hectare, making the total loss 23,400.
Soil erosion is the main cause of declining production and must be controlled to sustain production and keep soil loss below a threshold. Estimation of soil erosion using rusle and gis techniques. Estimation of soil erosion dynamics in the koshi basin. A user friendly gis model for the estimation of erosion. Estimating your soil erosion losses with the universal. Rusle2 is an upgrade of the textbased rusle dos version 1. This is the amount, which is compared to the tolerable soil loss limits. Laterites of birbhum district are indentified as the lowlevel laterites of rarh plain of west bengal and these are very much prone to severe soil erosion mainly surface and subsurface water erosion in the monsoonal season june september. It is a computer model containing both empirical and processbased. Erosion rate assigned to soil mapping units that represents the maximum rate of annual soil loss that can occur without reducing longterm productivity. Universal soil erosion equation for questions 17, determine what the rate of soil erosion will be without factoring in sustainability measures for two different sites in jordan. This study is a scaled up approach combined with a gis interface to estimate soil erosion using the rusle model in the kelani river basin, which is more. Estimation of soil loss using usle model for kulhan. A case study of muhuri river basin, tripura, india amit bera 0 0 department of geography and disaster management, tripura university, suryamaninagar, tripura, india soil erosion is a most severe environmental problem in humid subtropical hilly state tripura.
Evaluation of soil loss estimation using the rusle model. Not only does soil loss reduce the cultivable soil depth but it also takes away the fertile soils from the farmlands. Spain is the worlds leading producer of olive oil, with the largest number of olive agrosystems in the andalusia region. So its essential to estimate the soil loss, control soil erosion of and protection in the watershed. Pollutant load estimation for water quality monitoring. Soil losses occur from areas subjected to different types of erosion. This equation provides an estimate of the soil loss rate in tonshectareyear. The soil loss varies with the type of erosion and it is also influenced by all the factors that affect erosion. Rusle revised universal soil loss equation is widely used to predict average annual rate of soil erosion. An area capable of stopping all saltating soil particles from entering the windward side of a downwind field or unprotected area. The application of the soil loss estimation model for southern africa slemsa, the universal soil loss equation usle and the revised universal soil loss equation rusle in southern africa is investigated. Erosion contributes to loss of agricultural land productivity and ecological and esthetic values of natural environment, and it impairs the production of safe drinking water and hydroenergy production. The revised universal soil loss equation rusle is an empirical model developed by renard et al. Soil microbial life only makes up 5% of soil organic matter, but it is nevertheless vitally important in relation to.
Thus, assessment of soil erosion and identifying the lands more prone to erosion are vital for erosion management. Further, the soil erosion rate was classified into four. The result obtained from usle model has been compared with existing model, nayak and khosla. Here, the revised universal soil loss equation rusle and. Pdf introduction erosion, the detachment of particles of soil and surfacial sediments and rocks, occurs by hydrological fluvial processes of sheet. Soil loss estimation using rusle model to prioritize erosion control in. Base map a base map has been generated by digitizing the survey of india soi toposheet as reference map for all other purposes.
Soil erosion is one of the main forms of land degradation. It is imperative that a nps monitoring program be designed for good load estimation at the start. Model simulation of soil loss, nutrient loss and soil organic carbon the purpose of this study is to identify areas of the country that have the highest potential for sediment and nutrient loss from farm fields, wind erosion, and soil quality degradation areas of the country that would likely benefit the most from conservation practices. Universal soil loss equation usle a r x k x ls x c x p.
Estimation of pollutant load through monitoring is a complex task that requires accurate measurement of both pollutant concentration and water flow and careful calculation, often based on a statistical approach. This study attempts to utilize the revised version of the universal soil loss equation rusle, combined with rs and gis technologies to. A rxkxlxsxcxp 1 where, a is the average annual soil loss per unit area expressed in toneshayear t ha1 year 1. Uncontrolled land use, deforestation, over cultivation, overgrazing and exploitation of biomass for firewood, construction and other household uses due to increasing population ultimately lead to severe soil erosion. Pdf estimation of soil erosion by using usle researchgate. Predicting soil loss associated with modern land use is based on guidelines developed from research. Universal soil loss equation taiwan soil and water conservation manual 18 clearly stipulates that whenever slopeland is involved in nonagricultural development, soil loss estimation before, during, and after development must be conducted. A soil loss thayr areaha works duration years est gross. The present study uses the revised universal soil loss equation rusle and scscn soil conservation service curve number process to estimate in kiruburu and meghahatuburu mining sites areas. Cs from the atmospheric testing of nuclear devices in the 1950s and 1960s was used to estimate soil erosion in eight small. Soil erosion assessment using gis and revised universal. Soil degradation in the form of soil erosion is a serious and continuous environmental problem in jabi tehinan woreda. Mining operations result in the generation of barren land and spoil heaps which are subject to high erosion rate during the rainy season.
Estimation of soil erosion in nepal using a rusle modeling. This research established an empirical methodology to estimate potential soil erosion rate based on revised universal soil loss equation rusle and e30 model. After reading this article you will learn about the estimation of soil loss caused by water erosion. Pioneering the use of computers to analyze more than 11,000 plotyears ofbasic runoff and soil loss data from studies at 47 locations in 24 states,walter. A comprehensive methodology that integrates erosion models, geographic information system gis techniques, and a sediment delivery concept for estimating water. The national runoff and soil loss datacenter was established at purdue university in 1954 to locate, assemble,and consolidate data from soil erosion studies throughout the unitedstates. Based on the results of this estimation, the area which is vulnerable to erosion can be determined, and the.
The universal soil loss equation usle is a widely used mathematical model that describes soil erosion processes erosion models play critical roles in soil and water resource conservation and nonpoint source pollution assessments, including. Eurasian j soil sci estimation of soil loss by usle model using gis and remote sensing techniques. Soil loss is a major threat to the agricultural development in malawi and by extension is also a major hindrance to the overall economic development of the country since the malawian economy is dependent on agriculture. Tableofcontents illinoiserosioncontrolprogram 1 theuniversalsoillossequationusee 1 rainfallrfactor 2 soilerodibilitykfactor 2 slopelengthandsteepnesslsfactor 3 croppingandmanagementcfactor 3 conservationpracticespfactor 5 usingtheusee 6 workingthroughsomeexamples 6 solvingtheuseeforc 7 gettinghelp 7 tables 816. Estimation of soil loss by usle model using gis and remote. Each factor is the numerical estimate of a specific condition that affects the severity of soil erosion at a particular location. The comparison between universal soil loss equation usle. Geographical information systems gis is a modern tool, which provides information on all geographical variables and has been frequently used in soil erosion studies. Noor alia atiqah, ahmad rohaidi 2012 the comparison between universal soil loss equation usle and revised universal soil loss equation rusle for annual soil loss estimation at construction site. Along with the soil losses, loss of plant nutrients also occurs. Assessment of uncertainties in soil erosion and sediment yield.
It is an effective tool for assessing soil conservation. A geographic information system based soil loss and. The total soil loss from barren land was estimated to be 18 million t in 1990 and 15 million t in 2010. Practices that reduce the velocity of runoff and the tendency. Soil loss estimates will be rounded and reported as whole numbers. This project would increase the understanding of the waterborne soil erosion directly related to river systems and the gis combined rusle model. For the validation of the soil loss estimation model sediment delivery ratio concept was used, as observed data of sediment yield was present for the study area and no observed data of soil loss was available. The fourth 4th largest river of papua new guinea, and its catchment area was. Estimation of sediment yield using the universal soil loss equation project no. The study was conducted on a highly precipitated, rugged, tropical forested with steep slope watershed during 1992 to 2009. Pdf soil loss estimation through usle and mmf methods in. The model result shows that the average annual soil loss in the watershed is 17. While it can estimate long term annual soil loss and guide conservationists on proper cropping, management, and conservation practices, it can not be applied. Application of revised universal soil loss equation rusle.
The volume of the collected watersediment mixture is usually so great that subsampling techniques are required to estimate total soil loss in any erosion event. The revised universal soil loss equation rusle framed with gis and remote sensing technique was used to estimate the mean annual soil loss occurred in kw. Potential erosion from a site is important when prioritizing part 91 site inspections. The nrcs revised universal soil loss equation rusle is one method of estimating soil loss. Application of empirical soil loss models in southern. However, rural migration, low profitability, and biophysical limitations to production have compromised their sustainability. A r k ls c p 1 where a is the average annual soil loss in tnhayr, r is the rainfallrunoff factor. Estimation of soil erosion 112 africa slemsa of elwell 1978 and the modified universal soil loss equation musle of williams 1975. A universal soil loss equation has been developed by the soil scientists to estimate the soil loss from any area around the globe. The maximum mean soil loss rate estimated was 22 thayr from barren land. Estimate the potential soil loss areas within the kallar watershed, 2. Soil loss due to crop harvesting in the european union. Assessment of soil erosion and analysis of soil loss based on subwatershed within a watershed has been done by using morgan model 1984.
The total soil loss for the whole watershed was found as 28. It has been shown that the commonly used method involving a collection box or. Five major factors are used to calculate the soil loss for a given site. Soil erosion estimation model rusle the revised universal soil loss equation rusle model has been adopted to estimate the annual soil loss and the equation equation 1 is as. Soil erosion experimentation around the world commonly uses field runoff plots from which runoff and soil loss are collected.
Estimating water erosion and sediment yield with gis, rusle, and sedd c. Gizachew ayalew, a geographic information system based soil loss and sediment estimation in zingin watershed for conservation planning, highlands of ethiopia, international journal of science, technology and society. The equation uses the values of parameters of the factors that affect the soil erosion. Empirical soil loss models are relatively simple and have been applied in many parts of the world. Soil loss equation is to predict soil loss by using mathematical methods to evaluate factors causing soil erosion. Application of gully and rill erosion indicators for. Faculty of civil engineering and earth resources, universiti malaysia pahang. Furthermore, usle 12 is recommended as the basis for soil loss estimation as shown in equation 1. Estimation of soil erosion risk using the universal soil. Estimation of sediment yield using the universal soil loss.
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