Spatial variability of soil erodibility associated with lithology and topography

Document Type : Research Paper

Authors

1 Department of range and watershed management, Faculty of Natural Resources and Environment, Ferdowsi University of Mashhad, Mashhad, Iran

2 Department of soil Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran

Abstract

Today, water erosion is considered one of the most important forms of nature destruction, and the problems caused by it are inseparable problems of the country's watersheds. Among the numerous environmental factors affecting soil erodibility, lithology, topography and climate factors are the most important factors affecting soil erodibility. The purpose of this research is to investigate soil properties including number of drops impact (NDI), mean weight diameter of soil aggregates (MWD), soil penetration resistance (PR), soil cohesion (COH), saturated conductivity (Ks) and soil erodibility index (K). Therefore, six rock types (granite, limestone, ophiolite, shale, marl and sandstone) were selected in Razavi Khorasan province and sampling was done in three slope classes 0-10, 10-25 and more than 25% in 2021. In order to compare soil erodibility in similar rocks in different climates, limestone was selected in Tabas city (dry climate). The results showed that the average soil erodibility index and other indices have a significant difference (P<0.001). The results of measuring soil erodibility index in different slopes showed no significant erodibility index in three slope classes (sig=0.893, p<0.05). The comparison of the average soil erodibility in different climates in rocks similar to Paleogene limestone with a value of 0.83 in Tabas limestone and 0.96 (ton ha h / ha MJ mm) sarakhs limestone showed that the average soil erodibility in different climate has a significant difference (sig=0.023, p<0.05). The results of measuring CSEI index showed that the highest amount of reduction in erodibility reflected by this index is in granite with a value of 64% and the lowest value in shale with a value of 25%.

Keywords

Main Subjects


EXTENDED ABSTRACT

 

Introduction:

Soil erosion is a process in which soil is separated from its main bed and transported to another place by a transport factor. Soil erodibility is a main feature of soil properties that shows the sensitivity of soil to erosion and depends on various factors. One of the factors affecting soil erodibility is the slope of the land, which can directly or indirectly affect soil erodibility. The main purpose of this study is to investigate the changes in soil erodibility using the EPIC method and the physical properties affecting it in different types of rocks in two provinces of Razavi Khorasan and South Khorasan in three slope classes and to compare at least one of these types of rocks in two different climates.

Material and Methods:

 The studied area is located in two provinces of Razavi and South Khorasan in the cities of Mashhad, Chenaran, Sarakhs, Torbat-Hydriye and Tabas. The geographical location of the region in Razavi Khorasan province is from 58 degrees and 52 minutes to 60 degrees and 40 minutes’ north longitude and 35 degrees and 38 minutes to 36 degrees and 25 minutes’ east latitude, and in Tabas city, the studied area is from 33 degrees and 43 minutes to 33 degrees and 46 degrees’ north longitude and 56 degrees 33 minutes to 56 degrees 37 minutes’ east latitude. In this research, seven types of granite, Paleogene limestone, Jurassic limestone, marl, shale, sandstone and ophiolite were selected from the relatively pure rocks of Razavi Khorasan province, and one Paleogene limestone was also investigated to compare the difference in erodibility in different climates in Tabas city. Soil samples were taken from the surface layer (0-5 cm) and from three slope classes: less than 10%, 10-25% and more than 25%, as well as all soil samples from the southern slopes. Three soil samples were taken from each slope and a total 72 samples were taken and analyzed in the laboratory for physical and chemical properties. The sampling of this research was done in the summer of 2021 and the proposed tests were done in March 2022 in the soil science laboratory of the Faculty of Natural Resources of Ferdowsi University. In this study, the soil particle size distribution (texture) was measured by hydrometer method, organic carbon and calcium carbonate were determined by wet oxidation and titration with HCl 6 M, mean weight diameter of soil aggregates and Surface crust factor were calculated by related equations. Soil Cohesion and Penetration Resistance were measured by pocket vane test and pocket penetrometer, respectively. Comparison of means was done through Duncan test in SPSS software.

Results and Discussion:

A factorial test was conducted with a completely random design for the investigated variables in different rock types and its results showed that the lithology factor for all variables has a significant difference at the level of 1% (p<0.001). The soil erodibility factor also has a significant difference at the level of 1% in different rocks. The soil erodibility factor in different slopes has no significant difference. The soil erodibility in Ferns Paleogene limestone with an average of 0.96 (t ha h ha-1 MJ-1 mm-1) is 13% higher than the average soil erodibility in Tabas Paleogene limestone with a value of 0.83 (t ha h ha-1 MJ-1 mm-1) and these values in two Arid and semi-arid Climate are significant at the level of 5%.

Conclusion:

 Since soil erodibility is affected by various factors, it requires spending considerable time and money. Finding easily accessible parameters can save a considerable amount of time and money, especially when extensive samples are on the agenda. In this research, as there is a very good relationship between the soil erodibility and rock type, by completing the research on the major geological formations in the country, the rock type, which has a good database in the country, can be used as an easily accessible parameter to determine the soil erodibility level or limits.

 

Keywords:  CSEI Index, Erodibility, EPIC Model, Lithology, Soil indicators, Soil Erosion

Ahmadi, F., Nosrati, K., & Hoseinzadeh, M. M., (2019). Origin of the contribution of soil erodibility units in sediment production and its relationship with soil organic carbon stock in Kohdasht watershed in Lorestan province: Hydrogeomorphology, 5(20), 141-164. https://www.sid.ir/paper/383021/fa. (in Persian)
Blanco, H, & Lal, R., (2008). Principles of Soil Conservation and Management. Springer Science, pp: 1-46. DOI 10.1007/978-1-4020-8709-7.
Bouyoucos, G. J. (1962). Hydrometer method improved for making particle size analyses of soils. Agronomy Journal, 54(5), 464-465. http://dx.doi.org/10.2134/agronj1962.00021962005400050028x.
Buol, S. W., Southard R. J., Graham, R. C. McDaniel, P. A. (2003). Soil Genesis and Classification. Fifth Edition. Iowa State Press. https://doi.org/10.2136/vzj2003.7670
Brito, W.B.M., Campos, M.C.C., de Brito Filho, E.G., de Lima, A.F.L., Cunha, J.M., da Silva, L.I., dos Santos, L.A.C., & Mantovanelli, B.C., (2020). Dynamics and spatial aspects of erodibility in Indian Black Earth in the Amazon, Brazil. Catena, 185, p.104281. https://doi.org/10.1016/j.catena.2019.104281.
Bryan, R. B. 2000. Soil erodibility and processes of water erosion on hillslope. Geomorphology,32:385-415. https://doi.org/10.1016/S0169-555X(99)00105-1.
Chen, S., Zhang, G., Zhu, P., Wang, C. & Wan, Y., 2022. Impact of slope position on soil erodibility indicators in rolling hill regions of northeast China. Catena, 217, p.106475. https://doi.org/10.1016/j.catena.2022.106475.
Esmaieli, A & Abdollahi, KH. (2011). Watershed management and soil protection. second edition. Ardabil: Mohaghegh Ardabili University Publications. (in Persian).
Farajdokht, M. Asghari, SH & Shahab, H. (2017). Effect of height and slope on erodibility index (K) of universal soil loss equation. The fifth national conference and the first international conference on organic and conventional agriculture. https://civilica.com/doc/932968 (in Persian).
Fatollahi, T. Solemani, K., Kelarestani, A., Habibnezhad, M., Noormohamad, F., Jarareh, K & Doosti, Y., (2011). Investigating the role of soil texture in the sedimentation of reservoirs in the Sardeh al-Shatar spring area. The 6th National Conference on Watershed Science and Engineering and the4th National Conference on Erosion and Sedimentation. 269-274. https://civilica.com/doc/89102/. (in Persian).
Fryrear D.W., Bilbro J.D., Saleh A., Schomberg H.M., Stout J.E. and Zobeck T.M., 2000. RWEQ: improved
wind erosion technology. Journal of Soil and Water Conservation, 55: 183–189. https://www.researchgate.net/publication/259196891.
Haverkamp, R., Ross, P.J., Smettem, K.R.J. & J.Y. Parlange. (1994). Three-dimensional analysis of infiltration from disc infiltrometer. 2. Physically based infiltration equation. Water Resource Research, 30:2931–2935. https://doi.org/10.1029/94WR01788.
Irankhah, H., Asadi, H. Shabanpoor Shahrestani, M & GHorbanzadeh, N. (2016). The relationship between aggregate stability and some characteristics of soil and climate. The first international conference and the second national conference on agriculture, environment and food security. https://civilica.com/doc/638154. (in Persian).
Kemper W.D., & Rosenau R.C., (1986). Aggregate stability and size distribution. In: Klute, A. (ed) Methods of Soil Analysis. Part 1. Physical and Mineralogical Methods. Agronomy Monogroph No. 9. 2nd Edition. American Society of Agronomy and Soil Science Society of America, Madison, WI. 5:425–442. https://doi.org/10.2136/sssabookser5.1.2ed.c17.
Kiani Hirchgani, M., Sadeghi, H. R., & Felahatkar, S. (2019). Comparative analysis of soil erodibility factor in Shazand watershed. Journal of Ecohydrology. 6(1). 153-163. https://www.sid.ir/paper/254161/fa. (in Persian).
La Manna, L., Tarabini, M., Gomez, F. & Rostagno, C.M., (2021). Changes in soil organic matter associated with afforestation affect erosion processes: The case of erodible volcanic soils from Patagonia. Geoderma, 403, p.115265. https://doi.org/10.1016/j.geoderma.2021.115265.
Leoppert, R. H., Hallmark, C. T., and M. M. Koshy. (1984). Routine procedure for rapid determination of soil carbonates. Soil Sci. Soc. Am. J. 48: 1030-1033. https://doi.org/10.2136/sssaj1984.03615995004800050016x.
Liu, G., Xu, M. & Ritsema, C., (2003). A study of soil surface characteristics in a small watershed in the hilly, gullied area on the Chinese Loess Plateau. Catena, 54(1-2), pp.31-44. https://doi.org/10.1016/S0341-8162(03)00055-9.
Liu, H., Lei, T. W., Zhao, J., Yuan, C. P., Fan, Y. T. & Qu, L.Q. (2011). Effects of rainfall intensity and antecedent soil water content on soil infiltrability under rainfall conditions using the runoff on out method. Journal of Hydrology, 396: 24–32. https://doi.org/10.1016/j.jhydrol.2010.10.028.
Nezami, M., & GHodrati, A. (2013). The effect of land use and the slope of the soil erodibility coefficient in pasture lands. The 6th National Conference on Watershed Management and Water and Soil Resources Management. https://civilica.com/doc/264160. (in Persian).
NoruziFard, F., Salehi, M.H., Khademi, H., DavoudianDehkordi, A.R. (2010). Genesis, classification and mineralogy of soils formed on various parent materials in the north of Chaharmahal-Va-Bakhtiari province. Jounal Water and Soil. Ferdowsi University of  Mashhad, 24(4): 647-658. http://www.redalyc.org/articulo.oa?id=180249980007.
Omidvar. E., Kavian. A., Solaimani, K., & Moshari, S. (2015). Investigation of Applicability of Soil Map Units to Estimate the Spatial Variability of Soil Erodibility. Scientific Research Journal of Desert Ecosystem Engineering. 4(9). 95-107. https://www.sid.ir/paper/254521/fa. (in Persian).
Tahmasbi, F., jafarzadeh, A. A.(2012). The effect of clay minerals on soil erodibility in Kalibar and Dast Tabriz region. MSC Thesis, College of Agriculture. Department of Soil Science. University of Tabriz. (in Persian).
Pazhand, M., & Emami, H., (2019). Investigate the alteration of soil erodibility, organic carbon, calcium carbonate and clay percentage along a hillslope. The 16th Iran Soil Science Congress. University of Zanjan. https://www.sid.ir/paper/363164/fa. (in Persian).
 Pazhand, M., & Emami, H., Astaraee, A,.(2016). Relationship between Topography and Some Soil Properties. Journal of Water and Soil. Vol. 29, No. 6, Jan.-Feb. 2016, p. 1699-1710. 10.22067/jsw.v29i6.44736. (in Persian).
Reisian, R., & CHarkhabi, A., (2006). Investigating the effect of slope and land use on the rate of erosion and sedimentation in the Gorkak watershed. The first watershed conference. 305-309. https://www.sid.ir/paper/461877/fa. (in Persian).
 Richter. G., & Negendank. J. F. W., (1977). Soil erosion processes and their measurement in the German area of the Moselle river. Earth Surface Processes, 2: 261–7. https://doi.org/10.1002/esp.3290020217.
Salehi, M. (2014). Comparison of erodibility of soils obtained from two parent materials, limestone and marl, in pasture and rainfed areas in Cheshme Ali-le-Draz area, Chaharmahal and Bakhtiari province. The second national conference on engineering and management of agriculture, environment and sustainable natural resources. https://civilica.com/doc/357732. (in Persian).
Schaetzl, R. Anderson. S. 2005. Soils, Genesis and Geomorphology. Cambridge University Press.
Shi, X. Z., & Yu, D. S. (2001). Measurement of erodibility for soils in subtropical china by simulated and natural rainfall. Sustaining the Global Farm, pp: 803-806.
Tisdall, J. M., & Oades, J. M., (1982). Organic matter and water-stable aggregates in soils. Journal of Soil Science, 33: 141– 163. http://dx.doi.org/10.1111/j.1365-2389.1982.tb01755.x.
Vaezi, A. R., Bahrami, H. A., Sadeghi, H. R., & Mahdian, M. H, (2008). Study of factors affecting erodibility based on the universal soil loss equation in calcareous soils. Journal of Soil and Water Sciences. 14(5). https://www.sid.ir/paper/15969/fa. (in Persian).
Veihe, A. (2002). The spatial variability of erodibility and its relation to soil types: a study from northern Ghana. Geoderma, 106: 101-120. https://doi.org/10.1016/S0016-7061(01)00120-3.
Wang, H., Zhang, G.H., Li, N.N., Zhang, B.J. & Yang, H.Y., (2018). Soil erodibility influenced by natural restoration time of abandoned farmland on the Loess Plateau of China. Geoderma,325, pp.18-27. https://doi.org/10.1016/j.geoderma.2018.03.037.
Wang, H., Zhang, G.H., Li, N.N., Zhang, B.J. and Yang, H.Y., (2019). Variation in soil erodibility under five typical land uses in a small watershed on the Loess Plateau, China. Catena, 174, pp.24-35. https://doi.org/10.1016/j.catena.2018.11.003
Wang, H., Zhang, G.H. & Wang, J., (2022). Plant community near-surface characteristics as drivers of soil erodibility variation along a slope gradient in a typical semiarid region of China. Catena,212, p.106108. https://doi.org/10.1016/j.catena.2022.106108.
Wischmeier, W. H. & Smith, D. D. (1978). Predicting rainfall erosion losses: a guide to conservation planning. Agriculture Handbook. No.537, US Department of Agriculture, Washington DC.
Williams, J. R., Jones, C. A. and Dyke, P. T. (1984). A modeling approach to determining the relationship between erosion and productivity. Transactions of the American Society of Agricultural Engineers, 27, 129-144. doi: 10.13031/2013.32748 @1984.
Yao, Y., Liu, J., Wang, Z., Wei, X., Zhu, H., Fu, W. & Shao, M., (2020). Responses of soil aggregate stability, erodibility and nutrient enrichment to simulated extreme heavy rainfall. Science of the Total Environment, 709, p.136150. https://doi.org/10.1016/j.scitotenv.2019.136150.
 Zhang, K., Li, S., Peng, W. & Yu, B. (2004). Erodibility of agricultural soils and loess plateau of China. Soil and Tillage Research, 76: 157-165. https://doi.org/10.1016/j.still.2003.09.007.