Analysis of Rating Loops of interrill erosion on Consecutive Storms under Laboratory Conditions

Document Type : Research Paper


1 Department of Watershed Management Engineering, Faculty of Natural Resources, Tarbiat Modares University and Member of Watershed Management Society of Iran

2 Department of Watershed Management Engineering, Faculty of Natural Resources, Tarbiat Modares University

3 Professor/ Tarbiat Modares University


Studying sediment graph and sediment rating loops are as important and appropriate tools in analyzing sediment behavior with discharge changes and understanding the controlling role of discharge in sediment production during storms respectively. Therefore investigating the sediment behavior and variations in the form of sediment rating loops is so important in management planning and decisions. Accordingly the present study was therefore planned to analysis of sediment graphs and rating loops on consecutive storms under rainfall and soil erosion simulator condition. The simulations were done on a type of soil that was collected from Koujor region in Mazandaran Province. Towards this attempt, rainfall simulation experiments with intensities of 30 and 90 mm h-1were conducted in a set of 6 × 1 m plot with slope of 5 % during 6 consecutive storms. The results showed that total runoff increased with increasing of consecutive storms under rainfall intensities of 30 mm h-1 from 8.78 to 15.05 mm and under rainfall intensities 90 mm h-1 from 9.28 to 11.03 mm on the first and sixth storms respectively. But soil loss revealed more complex behavior than runoff so that occurred a sudden decrease in soil loss in fourth consecutive storm in compare with the other consecutive storms. Eventually, the results of rating loops on consecutive storms under rainfall intensities 30 and 90 mm h-1 reflected the variety of sediment output behavior in compare with discharge changes in different form of sediment rating loos including clockwise, counter clockwise and complex.


Main Subjects

De Girolamo, A.M., Pappagallo G. and Porto. A. L. )2015(. Temporal variability of suspended sediment transport and rating curves in a Mediterranean river basin: The Celone (SE Italy). Catena, 128, 135–143.
Gabet, E. J., Dunne, T. (2003). Sediment detachment by rain power, Water Resources Research, 39(1), ESG-1.
Gholami, L., Sadeghi, S. H. R. and Khaledi, A. V. (2012). Storm-wise rating loops in Chehelgazi watershed of Gheshlagh dam. Iranian Water Resource Journal, 6, 29-36. (In Farsi)
Kiani Harchegani, M, Sadeghi, S. H. R. and Asadi, H. (2017a). Inter-Storm variability of coefficient of variation of runoff volume and soil loss during rainfall and erosion simulation replicates. Ecohydrology, 4(1), 191-199. (In Farsi)
Kiani Harchegani, M., Sadeghi, S. H. R. and Asadi, H. (2017c); Changeability of concentration and particle size distribution of effective sediment in initial and mature flow generation conditions under different slops and rainfall intensities. Iranian Journal of Water Engineering and Management, 9(2), 205-216(In Farsi)
Kiani Harchegani, M, Sadeghi, S.H.R. Asadi, H (2018). Comparing grain size distribution of sediment and original soil under raindrop detachment and raindrop-induced and flow transport mechanism, Hydrological Sciences Journal, 63 (2), 312-323
Kinnell, P. I. A. (2005). Raindrop impact induced erosion processes and prediction: A review. Hydrological Processes, 19, 2815–2844.
Kinnell, P. I. A. (2009). The influence of raindrop induced saltation on particle size distributions in sediment discharged by rain-impacted flow on planar surfaces. Catena, 78(1), 2-11.
Mahdavi, M. (2002). Applied Hydrology, Tehran University Press. 2, 437. (In Farsi)
Meyer, L. D. and Harmon, W. C., (1984). Susceptibility of agricultural soils to interrill erosion. Soil Science Society of America, 48, 1152-1157.
Mostafazadeh, R., Sadeghi S. H. R. and Saddodin, A. (2015). Analysis of Storm-wise Sedimentgraphs and Rating Loops in Galazchai Watershed, West-Azerbaijan. Soil and Water Conservation Researches, 21(5), 175-190. (In Farsi).
Nadal-Romero, E., Latron, J., Marti-Bono, C. and Regues, D. (2008). Temporal distribution of suspended sediment transport in a humid Mediterranean badland area: The Araguascatchment, Central Pyrenees. Geomorphology, 97, 3-4. 601-616.
Nu-Fang, F., Zhi-Hua, S., Lu, L. and Cheng, J. (2011). Rainfall, runoff, and suspended sediment delivery relationships in a small agricultural watershed of the Three Gorges area, China Geomorphology, 135, 158–166.
Saeidi, P; Sadeghi, S. H. R. and Telvari, A. R. (2016). Simulation of sediment graph using hydrograph. Journal of Watershed Engineering and Management, 8(1), 28-41.
Parsons, A. J. and Lascelles, B. (2000);Rainfall simulation in geomorphology. Earth Surface Processes and Landforms, 25(7): 679-689.
Rovira, A. and Batalla, R. (2006). Temporal distribution of suspended sediment transport in a Mediterranean basin: The Lower Tordera (NE SPAIN). Geomorphology, 79, 58-71.
Sadeghi, S. H. R., Kiani Harchegani, M. and Asadi, H. (2017). Variability of particle size distributions of upward/downward splashed materials in different rainfall intensities and slope. Geoderma, 290, 100-106.
Sadeghi, S. H. R., Kiani Harchegani, H Asadi (2016); Splash particle size distribution along the experimental plot under different rainfall intensities and slopes. Iranian Journal of Water and Soil Researches, 47 (4), 657-664 (In Farsi)
 Sadeghi, S. H. R. and Kiani Harchegani, M. (2012). Effects of sand mining on suspended sediment particle size distribution in Kojour forest river, Iran. Journal of Agriculture Science and Technology, 14, 1637-1646.
Sadeghi, S. H. R. and Singh, J. K. (2005). Development of a synthetic sedimentgraph using hydrological data. Journal of Agriculture Science and Technology, 7, 69-77.
Sadeghi, S. H. R., Gholami, L., Khaledi, A. V. and Telvari, A. R. (2008a). Analyzing sedimentgraph data in Chehelgazi Watershed upstream Gheshlagh Dam. Iranian-Water Resource Research, 4, 3. 47-56. (In Farsi)
Sadeghi, S. H. R., Mizuyama, T., Miyata, S., Gomi, T., Kosugi, K., Fukushima, T., Mizugaki, S. and Onda, Y. (2008b). Determinant factors of sediment graphs and rating loops in a reforested watershed. Journal of Hydrology, 356, 271-282.
Sadeghi, S. H. R., Mizuyama, T., Singh, J. K. and Tofighi, B. (2009). Applicability of instantaneous unit sedimentgraph model in an Iranian large watershed. International Journal of Ecological Economics and Statistics™, 13, 9. 30-45.
Saeidi, P. and Sadeghi, S. H. R. (2010). Analysis of observed sedimentgraphs and rating loops on storm basis in Educational Watershed of Tarbiat Modares University. Iranian Journal of Water and Soil Conservation, 17(1), 97-12. (In Persian)
Sun, L., Yan, M., Cai, Q. and Fang, H. (2016). Suspended sediment dynamics at different time scales in the Loushui River, south-central China. Catena, 136, 152-16.
Walling, D. E. and Webb, B. W. (1982). Sediment availability and the prediction of storm-period sediment yields. Recent developments in the explanation and prediction of erosion and sediment yield, IAHS Publication, 137, 327-337.
Walling, D. E., Owens, Ph. N., Waterfall, B. D., Leeks, G. J. L. and Wass P. D. (2000). The particle size characteristics of fluvial suspended sediment in the Humber and Tweed catchments, UK. Science of Total Environment, 251/252, 205-222.
Wang, L., Shi, Z. H., Wang, J., Fang, N. F., Wu, G. L., Zhang, H. Y. (2014). Rainfall kinetic energy controlling erosion processes and sediment sorting on steep hillslopes: a case study of clay loam soil from the Loess Plateau, China, Journal of Hydrology, 512, 168-176.
Williams, G. P. (1989). Sediment concentration versus water discharge. Journal of Hydrology, 111, 89-106.