Nurina endra purnama f14104028 2008 departemen teknik pertanian fakultas teknologi pertanian institut pertanian bogor pendugaan erosi dengan metode usle universal soil loss equation di situ bojongsari, depok skripsi sebagai salah satu syarat untuk memperoleh gelar sarjana teknologi pertanian. In contrast, soil loss is much more sensitive to changes in slope steep ness than to errors in slope length. Use of the universal soil loss equation to predict erosion. If a sediment control practice is specified, then the soil discharge is further reduced relative to the efficiency of the practice. Improvement of the kfactor of usle and soil erosion. Revised universal soil loss equation, version 2 nrcs. Pdf evaluation of usle and rusle estimated soil loss on. A jumlah tanah hilang maksimum thatahun r faktor erosivitas hujan k faktor erodibilitas tanah ls faktor indeks panjang dan kemiringan lereng c faktor indeks pengelolaan tanaman.
Application of universal soil loss equation usle to. Perhaps no other development in soil and water conservations first 50 years has had as much impact on conservation efforts as development of the universal soil loss equation. Metode penelitian yang digunakan untuk mengetahui tingkat bahaya erosi ditentukan berdasarkan rumus universal soil loss equation usle dan arahan konservasi mengacu pada modifikasi dari kumajas. The disturbed site is 50 acres in size, with an average gradient of 8% and an average slope length of 500 feet. Regardless of whether the designation is fully accurate, the name does dis tinguish this equation from the regionally based soil loss equations. This is the amount, which is compared to the tolerable soil loss limits. It was not created to consider deposition or route sediment from a hill slope element. Method factsheet revised universal soil loss equation. Universal soil loss equation usle at the national runoff and soil loss data center in 1954 by the u. The usle was first implemented by the usda soil conservation service now natural resources conservation service in the early 1960s. The equation reliably predicts soil loss on an annual basis, but there is a need to be able to accurately predict soil loss for durations ofless than one year. Among all the predictive equations developed to estimate soil loss, the most accepted, used, convenient and suitable technique, for smaller areas like hillslopes and fields, is the universal soil loss equation usle. The universal soil loss equation southwest watershed research. Soil on a steep slope is more likely to be carried in water runoff than soil on flat ground.
Its purpose is to provide an understanding of how the universal soil loss equation. Thus,whenthekvaluewasdetermined with natural storm data, it represented a range of storm sizes and antecedent soil conditions later similar experiments wereperformed using rainfall simulators and produced a soil erodibility nomograph wischmeier and. Pdf geographic information systems gis in combination with soil loss models. Metoda ini sebagai suatu persamaan hanya dapat menduga. The universal soilloss equation is written a rklscp. The universal soil loss equation usle enables planners to predict the average rate of soil erosion for each feasible alternative combination of crop system and management practices in association with a specific soil type, rainfall pattern, and topography. Today, a quarter of a century after its publication, the usle remains the primary tool of conservationists for planning purposes. Metode prediksi laju erosi dilakukan dengan model empiris menggunakan persamaan rusle revised universal soil loss equation. Rusle was developed in 1987 by the nrcs, and is based on the earlier usle published by the scs in 1978. Application of usle and gis to predict erosion loss at brantas. The usle was first implemented by the usdasoil conservation service now natural resources conservation service in the early 1960s. Metode usle universal soil loss equation merupakan metode yang umum digunakan untuk memperediksi laju erosi. Soil loss through rill, gully and sheet erosion is a major environmental problem in india. Universal soil loss equation usle a r x k x ls x c x p.
Adjusting the cpmax factor in the universal soil loss equation usle. The usle provides a method for predicting longterm average annual soil losses under specific physical conditions, tillage practices, and cropping systems wischmeier and smith, 1972. The universal soil loss equation usle has been developed to estimate the rate of soil loss due to sheet and rill erosion on cultivated fields. When these predicted losses are compared with given. This site contains the official nrcs version of rusle2. Upland sediment loading due to hillslope erosion was modeled using the universal soil loss. Estimation of soil erosion risk using the universal soil. Universal soil loss equation usle and revised universal soil loss equation rusle. Selain sederhana, metode ini juga sangat baik diterapkan di daerahdaerah yang faktor utama penyebab erosinya adalah hujan dan aliran permukaan. This study pertains to sheet erosion only and all computations were done on a perstorm basis. Pdf assessment of soil loss by universal soil loss equation. P, dengan a sebagai besar laju erosi, r adalah erosivitas hujan, k adalah erosibilitas tanah, ls adalah faktor kelerengan, c adalah faktor pengelolaan tanaman dan p adalah faktor tindakan. Estimation of soil erosion risk using the universal soil loss.
More than 10,000 plotyears of basic runoff and soil loss data were then collected from u. Pdf comparison of different approaches to ls factor calculations. Usle was the first empirical erosion equation that was not tied to a specific region of the united states, thus the title universal soil loss equation. Dalam penelitian ini peneliti menggunakan metode usle universal soil loss equation untuk mengetahui prediksi laju erosi. The objective of this study was to quantify soil erosion in the a sap river basin, a luoi district, thua thien hue province, vietnam, using the universal soil loss equation usle. Analisis erosi dengan menggunakan metode usle universal soil. Universal soil loss equation usle the usle, developed by ars scientists w. Use of the universal ssil loss equation to predict erosion in west africa e. Application of usle and gis to predict erosion loss at. View of prediksi laju erosi menggunakan metode usle universal. Nov 28, 2014 data limpasan yang digunakan sebagai input dalam metode musle diperoleh dari hasil optimasi aplikasi model tangki.
The usle was developed by a team of scientists working under the leadership of walter h. A represents the potential longterm average annual soil loss in tonnes per hectare tons per acre per year. The usle was developed on midwestern us cropland to predict average annual soil loss caused by sheet and rill erosion from a hill slope element. The accuracy of the usle is best summarized by wischmeier 1976 as follows. Smith, has been the most widely accepted and utilized soil loss equation for over 30 years. Pdf penilaian erosi berdasarkan metode usle dan arahan.
Taken together with s, the steepness of slope, ls is the ratio of soil loss to a plot 22 m long with a 9% slope. Usle universal soil loss equation the universal soil loss equation for construction sites excel worksheet was developed by dane county water resource engineering to estimate soil loss from sheet and rill erosion on construction sites. Erosion prediction revised universal soil loss equation. Included in the electronic ah703 is an updated fig. Smith, has been the most widely accepted and utilized soil. Information inthis circular is basedon agricultural handbook 537 published by thescience and education. The revised universal soil loss equation rusle is an empirical erosion model recognised as a standard method to calculate the average risk of erosion on arable land. Musle merupakan modifikasi dari model penduga erosi universal soil loss equation usle yang merupakan model empiris yang dikembangkan di pusat data aliran permukaan dan erosi nasional, dinas penelitian pertanian, departemen penelitian amerika serikat usda bekerja sama dengan. Musle does not include soil loss that can occur through ephemeral gully or gully erosion processes or erosion of furrows or basins during gravity irrigation events.
Metode usle metode usle universal soil loss equation merupakan metode prediksi erosi model parametrik berdasarkan hubungan antara faktor penentu erosi dengan besarnya erosi. Universal soil loss equation is used for estimating soil losses. Membersstudents will know and understand the definition of soil erosion factors and soil conservation strategies. Ochsners fall 2014 soil physics class at oklahoma state university. Universal soil loss equation usle universal soil loss equation usle a. Estimating your soil erosion losses with the universal soil. The soil is a schoharie silt loam with a k value of. The process of water erosion has been described by the usda universal soil loss equation usle, later modified to the revised universal soil loss equation rusle. The usle was developed 5,at the national runoff and soil loss data center estab. Return to article details prediksi laju erosi menggunakan metode usle universal soil loss equation di desa karang tengah kecamatan babakan madang. 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.
Estimating soil erosion in tennessee using the universal. Pendugaan erosi dengan metode usle universal soil loss equation di situ bojongsari, depok oleh. The sediment discharge is the soil loss less a deposition value that varies based on soil type, slope, and slope length. These equations, originally developed to predict soil loss or movement from agricultural fields, but since expanded to include forestlands and rangelands, are instructional because. The universal soil loss equation usle is an empirical model that estimates net hillslope erosion. Erosi aktual berdasarkan nilai rklscp yang memiliki nilai lebih tinggi dari erosi yang dapat ditoleransi tsl memerlukan tindakan konservasi, begitu sebaliknya. The objective of this study was to quantify soil erosion in the a sap river basin, a luoi district, thua thien hue province, vietnam, using the universal soil loss equation usle and geographical information system gis. Pendugaan erosi dengan metode usle universal soil loss. 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. Furthermore, usle 12 is recommended as the basis for soil loss estimation as shown in equation 1.
Erosion models play critical roles in soil and water resource conservation and nonpoint source pollution assessments, including. Designed as a method to predict average annual soil loss caused by sheet and rill erosion, the usle is often criticized for its lack of applications. Usle is an estimate of sheet and rill soil movement down a. The universal soil loss equation usle or the revi sed universal soil loss equation rusle are often used together with sediment deliv ery ratios in order to predict sediment delivery from hillslopes.
The universal soil loss equation usle predicts the longterm average annual rate of erosion on a field slope based on rainfall pattern, soil type, topography. 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. The value approximates the difference between the usle soil loss and the sediment discharge from rusle version 2. 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. Erosi dengan menggunakan metode usle universal soil loss equation. The usle has beem used in more than 100 countries to guide connservation planning, assess soil erosion for conservation policy development, and. The musle allows the es timation of soil losses for eac h precipitation.
The slope length and steepness factors were extended for long slope lengths and steep slopes by recalculating the data from available literature in japan and by using data from supplementary erosion experiments. This equation provides an estimate of the soil loss rate in tonshectareyear. In using sediment deliver y ratios for this purpose, it is assumed that the sediment delivery ratio for a given hillslope d oes not vary with. Estimating your soil erosion losses with the universal. Using the tmdl usle tool to estimate sediment loads. Usle, which has been used successfully on cropland since the early 60s was adapted to estimate erosion on. Rusle, previously the universal soil loss equation usle, was developed to estimate average annual soil loss from agricultural fields. Method factsheet rusle revised universal soil loss. Assume syracuse, new york, as the locale of a construction site. Universal soil loss equation usle a r x k x ls x c x p a represents the potential longterm average annual soil loss in tonnes per hectare tons per acre per year. By 1940, sufficient data had been collected for zingg. It developed from the universal soil loss equation usle developed in the us department of. Metode persamaan usle dikembangkan oleh wischmeir dan smith 1978, dalam asdak, 2010.
This equation does not compute the sediment yield from the watershed, directly. Assessment of soil loss by universal soil loss equation usle model using gis techniques. Metoda usle metoda usle adalah model erosi yang dirancang untuk memprediksi ratarata erosi tanah dalam jangka panjang dari suatu areal usaha tani dengan sistem pertanaman dan pengelolaan tertentu wischmeir, 1978. Introduction universal soil loss equation usle montana. Soil losses computed by the equation must be recognized as the best. The universal soil loss equation usle is a widely used mathematical model that describes soil erosion processes. The universal soil loss equation usle and the revised universal soil loss equation rusle 1. Roose erosion has for centuries been an obstacle to development.
Revised universal soil loss equation rusle, an online tool for soil erosion assessment and conservation planning. The usle has beem used in more than 100 countries to guide connservation planning, assess soil erosion for conservation policy development, and estimate sediment yield. Areas in need of soil erosion protection in the czech republic. Developed to predict longterm average annual soil loss from erosion on uniform cultivated fields in eastern u. Usle developpy,ed by scientists at ars, scs, purdue univ. Most of them are using the universal soil loss equation usle and its revised version rusle 16. To compute the sediment yield by use of usle, the computed soil loss using usle is. Analisis pengaruh erosivitas hujan r terhadap laju erosi dengan menggunakan metode usle universal soil loss equation di wilayah. Central vietnam is very susceptible to soil erosion due to its complicated terrain and heavy rainfall. Salah satu metode untuk menduga atau menghitung nilai erosi melalui pendekatan usle universal soil loss equation.
Application of the universal soil loss equa tion to. Revised universal soil loss equation 2 rusle2 documentation. Consequently, man has tried to remedy this in diverse ways terraces, reservoirs, itinerant cultivation, etc. Thename universal soil lossequationoriginatedasameans. It developed from the universal soil loss equation usle developed in the us department of agriculture and has other similar variants such as the modified usle musle and abag allgemeine bodenabtragsgleichung. The universal soil loss equation usle equation 1 was developed by the united states department of agriculture usda for estimating sheet and rill erosion from agricultural fields under specific conditions wischmeier and smith, 1978. Revised universal soil loss equation for application in canada.
Tindakan konservasi harus melihat aspek sosial, ekonomi, dan kondisi riil di lapang. Based on the data assembled at the data center and previous studies, wischmeier, smith, and others developed the universal soil loss equation usle. Pendugaan erosi dengan metode usle universal soil loss equation. 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. Rusle has a more linear slope steepness relationship than did the usle. Universal soil loss equation usle, originally developed by the usda for agricultural lands and then used throughout the world, was applied in mountainous forest terrain in japan.
It does not predict soil loss resulting from gully erosion. In the usle, for example, a 10% error in slope steepness will usually give about a 20% error in computed soil loss. Parameterparameter yang diperhitungkan untuk pendugaan dengan metode usle adalah erosivitas hujan r, erodibilitas tanah k, panjang lereng l, kemiringan lereng s, pengelolaan tanaman c, dan konservasi tanah p. Metode yang digunakan pada penelitian ini adalah metode usle universal soil loss equation dengan pendekatan sistem informasi geografis.
Erosion prediction usle used for hel, nri, and other. Nov 30, 2014 this video was created by group 1 of dr. It is the only version of rusle2 to be used for official purposes by nrcs field offices. The revised universal soil loss equation rusle renard, et al.
Prediksi erosi dengan usle dan sistem informasi geografi a. Erosion index is a measure of the erosive force of a specific rainfall k soil erodability factor erosion rateunit of erosion index for a specific soil in. Many techniques and studies realized worldwide were done about the evaluation of soil loss. The structural stability of the soil also determines its erodibility factor. A large number of studies have been carried out using geostatistical methods to estimate the spatial vulnerability of soil erosion by water using the universal soil loss equation usle and the revised soil loss equation rusle buttafuoco et al. Universal soil loss equation usle and its revised version, rusle. The soil loss equation presented in this hand book has become known 57. Musle is a modification of the universal soil loss equation usle. Revised universal soil loss equation, version 2 official nrcs rusle2 program and official nrcs database.
1148 1167 727 289 627 179 1474 195 891 193 835 542 1612 540 364 596 1182 950 550 1472 1518 429 69 519 4 1276 437 460 1014 1173 804 1106 874 841 989 1084