Mitigating Rainfall-Induced Sediment Hazard and Soil Erosion Using Organic Amended Soil Improvement
Khonesavanh Vilayvong*,†, Noriyuki Yasufuku*, and Kiyoshi Omine**
744 Motooka, Nishi-ku, Fukuoka, Japan
**Nagasaki University, Nagasaki, Japan
Soil-organic amendment (SOA) is one of the sustainable soil improvement measures to mitigate climate change related issues such as rainfall-induced hazard and soil erosion. Organic wastes particularly compost and biochar can be reused and recycled into viable resources. However, there are limited data on incoporating organic wastes into a soil that is susceptible to erosion by rainfall. Therefore, objective of this study is to investigate properties of a soil from Okinawa prefecture (Kunigami maaji) that are associated with resisting ability against artificial rainfall intensities of 30, 60, 90 and 120 mm/h after adding two organic matters: household-derived compost and rice hush-derived biochar. The properties were soil-water retention, runoff, soil loss, infiltration and electrical conductivity. The compost was mixed with the soil at application rates of 0.5, 1.0, 1.5 and 2.0 kg/m2. The compost of 1.0 kg/m2 was mixed with the soil and the biochar at application rates of 1, 3, and 5% by total weight. Experimental results indicate that the soil water retention properties of the soil were improved by the treatment of compost and biochar. However, soil loss was not significantly reduced under initially saturated soil condition, applied rainfall intensities, testing duration and experimental conditions. The results of this study could be used as baseline data for evaluating correlation between properties of soil water retention curves to soil erosion.
-  L. J. M. Tisdal and J.M. Oades, “Organic matter and water-stable aggregates in Soils,” J. of Soil Science, Vol.33, pp. 141-163, 1982.
-  W. J. Rawls, Y. A. Pachepsky, J. C. Ritchie, M. T. Sobecki, and H. Bloodworth, “Effect of soil organic carbon on soil water retention,” Geoderma, Vol.116, No.1, pp. 61-76, 2003.
-  K. Onaga, “Practical studies on soil erosion in the northern parts of Okinawa,” Sci. Bull. Coll. Agric. Unive. Ryukyus, Vol.33, pp. 111-209, 1986 (in Japanese).
-  H. Yamamoto, “Rill and interrill erosion on a bare land made of red soil in Okinawa, Japan,” Georg. Rev. Jpn, Vol.59, pp. 470-479, 1986.
-  Y. Tokashiki, T. Yamada, M. Shimo, and K. Onaga, “Physical properties of the surface and the runoff soils of made land in Okinawa Island,” Jpn. J. Soil. Sci. Plant. Nutr, Vol.65, pp. 115-125, 1994 (in Japanese).
-  N. Yasufuku, K. Araki, K. Omine, K. Okumura, and K. Iwami, “Evaluation of inhibitory effect by adaptation measures for red soil runoff from farmland due to heavy rainfall,” J. of Disaster Research, Vol.10, No.3, pp. 457-466, 2015.
-  L. B. Faucette, L. M. Risse, M. A. Nearing, J. W. Gaskin, and L. T. West, “Runoff, erosion and nutrient losses from compost and mulch blankets under simulated rainfall,” J. of Soil and Water Conservation, 2004.
-  M. Tejada and J. L. Gonzalez, “Influence of organic amendments on soil structure and soil loss under simulated rain,” Soil Tillage Res. Vol.93, pp. 197-205, 2007.
-  M. Xiao and J. Gomez, “Rainfall erosion resistance and stability of various composts,” J. of Soil and Water Conservation, Vol.64, No.4, pp. 233-242, 2009.
-  E. Arthur, W. M. Cornelis, J. Vermang, and D. E. Rocker, “Effect of compost on erodibility of loamy sand under simulated rainfall,” Catena, Vol.85, pp. 67-72, 2010.
-  J. Yang, K. Onaga, S. Gibo, and Y. Tokashiki, “Erosion control of Kunigami-maaji soil by applying of different organic matters,” Trans. Of JSIDRE. No.198, pp. 161-168, 1998.
-  F. Verheijen, S. Jeffery, A.C. Bastos, M. V. D. Velde, and I. Diafas, “Biochar application to soils: A critical scientific review of effects on soil properties, processes, and functions,” Joint Research Centre (JRC), European Commission, 2010.
-  J. Lehmann and S. Joseph, “Biochar for environmental management,” Earthscan, UK, 2009.
-  R. A. Gardner, “The method of measuring the capillary tension of soil moisture over a wide moisture range,” Soil Science, Vol.43, pp. 227-228, 1937.
-  M. Th. van Genuchten, “A closed form equation for predicting the hydraulic conductivity of unsaturated soils,” Soil Sci. Soc. Am. J., Vol.44, pp. 892-989, 1980.
-  E. C. Childs and N. Collis-George, “The permeability of porous materials,” Proc. Royal Society of London, Series A, Vol.201, pp. 392-405, 1950.
-  D. G. Fredlund and H. Rahardjo, “Soil mechanics for unsaturated soils,” New York: John Wiley & Sons, 1993.
-  A. Guerra, “The effect of organic matter content on soil erosion in simulated rainfall experiments,” in W.Sussex, UK. Soil use and Management, Vol.10, pp. 60-64, 1994.
-  K. Vilayvong, N. Yasufuku, and R. Ishikura, “Evaluation of rainfall erosivity and impact forces using strain gauges,” J. Lowland Technology Int., Vol.17, pp. 207-214, 2016.
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