42.Ramcina, 91.04 m³/km² god; 35.Karlicića potok, 81.28 m³/km² god; 24.Krivaja, 79.46 m³/km² god; 08. Krivacki potok, 77.15 m³/km² god; 51.Nedakusi, 53.95 m³/km² god; 27.Makva, 41.00 m³/km² god; 21.Navotinski potok, 36.98 m³/km² god.
We used the Intensity of Erosion and Outflow (IntErO) program package (Spalevic, 2011) to obtain data on forecasts of maximum runoff from the basin and soil erosion intensity. Sediment yields were calculated on 347,273 m3/year for the 57 basins of Polimlje.
The calculations for the Polimlje region correspond to the measuring done by the engineers Muhidin Begic and Milosav Vranic (0.35 x 106m3) obtained at the Potpec accumulation, which is downstream from the study area. This correspondence suggests that the assessment results of actual losses of soil erosion potential obtained by IntErO model are eligible for the study area.
According to Babic et al (2003) from the “Jaroslav Černi” Institute for the Development of Water Resources (JCI), the leading research organization in Serbia’s water sector, real soil losses are 350 m³/km² per year for the Lim river basin (Polimlje, Fig. 1). By using the IntErO software to estimate the soil losses per km2 in 57 river basins of Polimlje, we found that the average value is 331.78 m³/km² per year (Spalevic, 2011). This correspondence suggests that the results of the assessment obtained by IntErO model are eligible for the study area of Polimlje in Montenegro.
Comparison between this model and direct measurements of sediment transport was also done by Tazioli (2009). The study was applied to different equipped basins in Italy and Africa. The numerical results obtained for some basins in the Marche region (Italy) are compared with empirical formula for the calculation of erosion. Conclusion of the research of Tazioli was that this model is particularly useful for small and medium water courses (similar to those of the Apennine ranges in Italy), allowing an assessment of the erosion in the whole watershed.
This methodology is in use also in Bosnia & Herzegovina, Croatia, Italy, Montenegro, Macedonia, Serbia and Slovenia. The EPM is distinguished by its high degree of reliability in calculating sediment yields as well as transport and reservoir sedimentation.
Erosion potential method (EPM) is embedded in the algorithm of IntErO computer-graphic method.
Spalevic, V. (2011): Impact of land use on runoff and soil erosion in Polimlje. Doctoral thesis; p 1-260. Faculty of Agriculture of the University of Belgrade, Serbia.
In fact, the average rate of sediment yield in Iran is about 17 tones/ha/year based on 319 hydrometric stations data. this average rate is more than twice or maybe three times the global average (different resources).
In case of maximum observed rates, there are some sites with observed sediment yield more than 33 tones/ha/year.
In case of Europe, there is a good information in the attached paper link entitled:
"REGIONAL DIFFERENCES AND SCALE DEPENDENCY OF SEDIMENT YIELD IN EUROPE"
We have measured natural erosion rates and man-made soil losses in the Central Highlands of Sri Lanka. The rates and their comparison can be found in the following paper.
Hewawasam Tilak, Friedhelm von Blanckenburg, Mirjam Schaller and Peter Kubik; Increase of human over natural erosion rates in tropical Highlands constrained by cosmogenic nuclides, 2003, Geology, 31, 597-600.
According to my findings (period of research 1999-2011) real soil loses from the 57 river basins in Polimlje, North of Montenegro (m³/km² year) are the following:
Real soil loses for 57 river basins of Polimlje (on the territory of Montenegro) are 347,273 m3/year (area of around 2158 km2).
SOURCE:
Main Source:
Spalevic, V. (2011): Impact of land use on runoff and soil erosion in Polimlje. Doctoral thesis, 260p, Faculty of Agriculture of the University of Belgrade, Serbia.
Specific:
Velibor SPALEVIC, Kemal GRBOVIC, Kosta GLIGOREVIC, Milic CUROVIC and Paolo BILLI (2013): CALCULATION OF RUNOFF AND SOIL EROSION ON THE TIFRAN WATERSHED, POLIMLJE, NORTH-EAST OF MONTENEGRO. Agriculture & Forestry, Vol. 59. Issue 4: 5-17, 2013, Podgorica
Spalevic, V., M. Curovic, V. Tanaskovik, M. Oljaca, N. Djurovic (2013): The impact of land use on soil erosion and run-off in the Krivaja river basin in Montenegro. The First International Symposium on Agricultural Engineering, 4th - 6th October 2013, Belgrade–Zemun, Serbia, VI: 1-14.
Spalevic, V., J. Nyssen, M. Curovic, T. Lenaerts, A. Kerckhof, K. Annys, J. Van Den Branden, A. Frankl (2013a): Тhe impact of land use on soil erosion in the river basin Boljanska rijeka in Мontenegro. In proceeding of the 4th International Symposium “Agrosym 2013” (3-6 October, 2013, Jahorina, Bosnia). Key note speakers, p. 54-63.
Spalevic, V., M. Curovic, N. Uzen, I. Simunic, M. Vukelic-Shutoska (2013b): Calculation of soil erosion intensity and runoff in the river basin of Ljesnica, Northeast of Montenegro. In proceeding of the 24th International Scientific-Expert Conference on Agriculture and Food Industry, Sarajevo, Bosnia and Herzegovina.
Spalevic, V., I. Simunic, M. Vukelic-Sutoska, N. Uzen and M. Curovic (2013d): Prediction of the soil erosion intensity from the river basin Navotinski, Polimlje (Northeast Montenegro). Agriculture and Forestry 59 (2): 9-20 (Online).
Spalevic, V., W. Mahoney, N. Đurović, N. Üzen and M. Curovic (2012): Calculation of soil erosion intensity and maximum outflow from the Rovacki river basin, Montenegro. Agriculture and Forestry 58 (3): 7-21(Online).
Spalevic, V., M. Curovic, D. Borota and B. Fuštić, B. (2008): Soil erosion in the River Basin Zeljeznica, area of Bar, Montenegro. Agriculture and Forestry 54 (1-4): 5-24.
Spalevic, V., M. Curovic, and A. Povilaitis (2007): Conditions of soil erosion in the Komarača river basin, North-East of Montenegro. Paper presented at conference Erosion and Torrent Control as a Factor in Sustainable River Basin Management, Belgrade.
Spalevic, V., M. Curovic, A. Povilaitis and S. Radusinović (2003): Estimate of Maximum Outflow and Soil Erosion in the Biogradska River Basin. Monographs, No.1, Biodiversity of the Biogradska Gora National Park, ed. V.
Spalevic, V., G. Seker, B. Fuštić and Ristić R. Šekularac (2003): Conditions of erosion of soil in the drainage basin of the Crepulja - Lucka River. Paper presented at, Natural and Socioeconomic effects of Erosion Control in Mountainous Regions, pp. 287-292, Banja Vrujci, Srbija, Faculty of Forestry, Belgrade, World Ass. of Soil&Water Conservation.
Spalevic, V., B. Fuštić, S. Šoškić and R. Ristić (2001): The estimate of maximum outflow and soil erosion intensity in the Vinicka river basin with application of computer graphic methods. Agriculture and Forestry 47 (3-4): 95-104.
Spalevic, V., Fustic, B., Jovović, Z., Curovic, M., Spalevic, B., Popovic. V. (2000): Characteristics of erosion processes and proposal of land reclamation measures in the drainage basin of the Šekularska river. Agriculture and Forestry 46(3-4): 2-18.
Spalevic V., A. Dlabač , B. Spalevic, B. Fuštić and V. Popović (2000a): Application of computer - graphic methods in the research of runoff and intensity of ground erosion - I program "River basins". Agriculture and Forestry 46 (1-2): 19-36.
Spalevic, V. (1999): Application of computer-graphic methods in the studies of draining out and intensities of ground erosion in the Berane valley. Master thesis, Faculty of Agriculture of the University of Belgrade, Serbia, 135p.
Spalevic, V., D. Dubak, B. Fuštić, Z. Jovović and R. Ristić (1999a): The estimate of the maximum outflow and soil erosion intensity in the Kaludra River basin. Acta Agriculturae Serbica IV(8): 79-89.
Detailed information on this data you may find on some of my papers published in the journal "Agriculture and Forestry":
In our study in Poland, where soil erosion rates and sediment yields are generally seen as low by global standards, we indicated that reservoir sedimentation is a problem and there is a need to develop and validate a method for soil losses and for estimating catchment sediment yields. In the lowland part of the country the specific suspended sediment yield is as low as 5 t/km2/year (mean for the catchment of 82 km2 and for ca 30 years) and in mountain areas (Carpathians) is up to 110 t/km2/year (mean for the catchment of 785 km2 and for ca 50 years). Soil loss estimated from the catchments is 54 t/km2/year and 1060 t/km2/year, respectively. Detailed description could be found in the publications:
Brański, J. & Banasik K. (1996) Sediment yields and denudation rates in Poland. In: Erosion and Sediment Yield: Global and Regional Perspectives (ed. by D. E. Walling & B. W. Webb) (Proc. Exeter Symp., July 1996), 133–138. IAHS Publ. 236. IAHS Press, Wallingford, UK.
Banasik, K., Barszcz, M. & Brański, J. (2005) Major components of a sediment budget for four river catchments in Poland. In: Sediment Budgets II (ed. by A. J. Horowitz & D. E. Walling), 32–36. IAHS Publ. 292. IAHS Press, Wallingford, UK.
Banasik K., Gorski D., Popek Z. & Hejduk L. (2012) Estimating the annual sediment yield of a small agricultural catchment in central Poland. In: Erosion and Sediment Yields in the Changing Environment (Ed. by A.E. Collins, V. Golosov, A.J. Horowitz, X. Lu, M. Stone, D.E. Walling and X. Zhang). IAHS Publ. 356. Wallingford, IAHS Press, 267-275.
you find data from Europe in the 2 papers of a colleague and me:
The history of soil erosion and fluvial deposits in small catchments of central Europe: Deciphering the long-term interaction between humans and the environment — A review. Geomorphology. M. Dotterweich, Volume 101, Issues 1–2, 1 October 2008, Pages 192–208
Historical soil erosion by water in Germany: Scales and archives, chronology, research perspectives. S. Dreibrodt et al., Quaternary International, Volume 222, Issues 1–2, 1 August 2010, Pages 80–95.
Our research group has measured soil loss rates in excess of 200 t/ha/yr. We often measure rates in excess of 50 t/ha/yr. These rates are observed on hilltops of ridges and knolls. Similar rates can be observed at the upper slope position of any slope, if one looks. These losses are not the result of wind and water erosion, they are the result of tillage erosion.
Our research group measures post-fire erosion rates, and I can indicate some maximum records:
Eucalypt: 7.62 Mg.ha-1.year-1
Pine:0.39 Mg.ha-1.year-1
in:
Vieira D.C.S., Prats S.A., Nunes J.P., Shakesby R.A., Coelho C.O.A., Keizer J.J. (2014) Modelling runoff and erosion, and their mitigation, in burned Portuguese forest using the revised Morgan–Morgan–Finney model. Forest Ecology and Management. 314, 150-165.
Pine 3.61 Mg.ha-1.year-1
in:
Prats S.A., Malvar M.C., Vieira D.C.S., MacDonald L., Keizer J.J. (2013) Effectiveness of Hydromulching to reduce runoff and erosion in a recently burnt Pine plantation in Central Portugal. Land Degradation & Development.
please see and comment on our new paper in discussion review (NHESS) on massive erosion along roads in China
Epic landslide erosion from mountain roads in Yunnan, China – challenges for sustainable development
Author(s): R.C. Sidle et al.
MS No.: nhess-2014-116
MS Type: Research Article
The paper is now accessible and open for Interactive Public Discussion until 29 Jul 2014 at: http://www.nat-hazards-earth-syst-sci-discuss.net/2/3887/2014/
The variety of units used to express soil loss is noteworthy. There are pros and cons for using mass-based and volume-based units. Mass is normally used because of the problems associated with the variability in bulk density.
In your question you have used Imperial tons with Metric hectares -- this may be a simple mistake. Use tonnes or Mg per hectare.