Splash erosion is recognized as the first stage in soil erosion process and results from the bombing of the soil surface by rain drops. One of the soil erosion control methods is the use of chemical polymers. The purpose of this study was to investigate the effects of different rates of polyacrylamide - PAM (0, 2, 4 and 6 kg/ha) - on the rate of splash erosion at three rainfall intensities (60, 90 and 120 mm/h) and three rainfall durations (10, 20 and 30 minutes) in laboratory conditions using a FEL3 rainfall simulator and Morgan splash bowls on a marly soil with loam soil texture. In all three intensities, rainfall duration and PAM treatments, the reductions of erosion were significant at 99% level, while their interaction was not statistically significant. The results indicated that 2 kg/ha of PAM did not show any significant difference in splash erosion reduction for all the intensities and durations. Increasing the rate of PAM from 4 kg/ha to 6 kg/ha helped to reduce the splash erosion rate; however, there was not a significant difference between the rates of 4 and 6 kg/ha of PAM in the intensity of 90 and 120 mm/h. Most splash erosion reduction (54%) was obtained for the intensity of 60 mm/h and the duration of 10 min with 6 kg/ha of PAM.
Al-Uzairy BN. 2015. The effectiveness of two soil amendments: gypsum and polyacrylamide on soil erosion under saline conditions in Australia. Int J Environ Sci Develop. 6(5):375-380.
Boroghani M, Hayavi F, Noor H. 2012. Affectability of splash erosion by polyacrylamide application and rainfall intensity. Soil Water Res. 7(4):159-165.
Cheng Q, Cai Q, Ma W. 2008. Comparative study on rain splash erosion of representative soils in China. Chinese Geogr Sci. 18(2):155-161.
Frauenfeld B, Truman C. 2004. Variable rainfall intensity effects on runoff and inter rill erosion from two coastal plain Ultisols in Georgia. Soil Sci. 169(2):143-154.
Green VS, Stott DE. 1999. Polyacrylamide: A review of the use, effectiveness, and cost of a soil erosion control amendment. In: Proceedings of the 10th International Soil Conservation Organization Meeting; 1999 May 23-28; Purdue University, West Lafayette, Indiana, USA; p. 384-389.
Kumar A, Saha A. 2011. Effect of polyacrylamide and gypsum on surface runoff, sediment yield and nutrient losses from steep slopes. Agr Water Manage. 98(6):999-1004.
Morgan RPC. 1978. Field studies of rain splash erosion. Earth Surface Processes and Landforms 3(3):295-299.
Özdemir N, Öztürk E, Durmuş ÖTK, Ekberlia İ. 2015. Effects of organic and inorganic amendments on soil erodibility. Eurasian J Soil Sci. 4(4):266-271.
Sadeghi SH, Hazbavi Z, Younesi H, Bahramifar N. 2016a. Trade-off between runoff and sediments from treated erosion plots and polyacrylamide and acrylamide residues. Catena 142:213-220.
Sadeghi SH, Raisi MB, Hazbavi Z. 2016b. Effects of polyacrylamide in controlling of splash erosion from a soil induced freeze-thaw cycle. J Water Soil 29(6):1601-1611.
Sepaskhah AR, Bazrafshan-Jahromi AR. 2006. Controlling runoff and erosion in sloping land with polyacrylamide under a rainfall simulator. Biosyst Eng. 93(4):497-474.
Sepaskhah AR, Mahdi-Hosseinabadi Z. 2008. Effect of polyacrylamide on the edibility factor of a loam soil. Biosyst Eng. 99(4):598-603.
Sepaskhah AR, Shahabizadeh V. 2010. Effects of water quality and PAM application rate on the control of soil erosion, water infiltration and runoff for different soil textures measured in a rainfall simulator. Biosyst Eng. 106(4):513-520.
Shengqiang T, Dongli S. 2018. Synergistic effects of rock fragment cover and polyacrylamide application on erosion of saline-sodic soils. Catena 171:154-165.
Soltani-Gerdefaramarzi S, Ghezelseflue N, Boroghani M. 2014. Changes of splash erosion rate in rainfall different duration and intensity on marl soils. Journal of Environmental Erosion Research 4:72-84. (In Persian).
Szögi AA, Leib BG, Redulla CA. 2007. Erosion control practices integrated with polyacrylamide for nutrient reduction in rill irrigation runoff. Agr Water Manage. 91(1-3):43-50.
Wuddivira MN, Stone RJ, Ekwue EI. 2009. Clay, organic matter and wetting effects on splash detachment and aggregate breakdown under intense rainfall. Soil Sci Soc Am J. 73(1):226-232.
Yonter G. 2010. Effects of polyvinylalcohol (PVA) and polyacrylamide (PAM) as soil conditioners on erosion by runoff and by splash under laboratory conditions. Ekoloji 19(77):35-41.