Abstract
Two major cohesionless soil series of the central Coast Ranges of Oregon were examined for soil and hydrologic properties. Although derived from different parent material, the Bohannon and Klickitat series exhibited nearly identical values of soil and hydrologic properties. Aggregation in both soils was found to be the most important property, for it influences shear strength and subsurface water movement, prime components of slope stability. The unusually high angle of internal friction of both cohesionless soils was 40° to 41°. The angle of internal friction was affected significantly by the mode of wetting. Subsurface water movement was predominantly by unsaturated flow. The influence of soil aggregation on pore-size distribution and arrangement created conditions where unsaturated flow was an effective means for water dispersal in both soils during most observed storm events. Considering the large area covered by these two soil series, aggregation appears to be an important slope-stability property with regional significance.
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References
Baldwin, E. M., 1955, Geology of Oregon, 2nd ed.: Eugene, Oregon, Univ. Oregon Press, 165 p.
Baver, L. D., 1935, Factors contributing to the genesis of soil micro structure. Am. Soil Sci. Assoc. Bull. 16, p. 55–56.
Bishop, A. W., and D. J. Henkel, 1962, The measurement of soil properties in the triaxial test: London, E. Arnold Ltd., 227 p.
Brooks, R. H., and A. T. Corey, 1966, Properties of porous media affecting fluid flow: Am. Soc. Civ. Eng. Proc., Jour. Irrigation and Drainage Div., No. IR 2, paper 4855, p. 61–88.
Brown, G. W., 1973, The impact of timber harvest on soil and water resources: Oregon State University, Corvallis, Extension Bull. 827, 17 p.
Chen, L. W., 1948, An investigation of stress-strain and strength characteristics of cohesionless soils by triaxial compression tests: Proc. 2nd Internat. Conf. on Soil Mechanics, Rotterdam, v. 5, p 35–43.
Chesters, G., O. J. Attoe, and O. N. Allen, 1957, Soil aggregation in relation to soil constituents. Soil Science Soc. America Proc., v. 21, p. 272–277.
Corliss, J. F., 1973, Soil survey of Alsea area, Oregon: U.S. Dept. Agriculture, Soil Conservation Service, and U.S. Forest Service Soil Survey, 82 p.
Day, P. R., 1965, Particle fractionation and particle-size analysis,in C. A. Black and others, eds., Methods of soil analysis: Madison, Wisc., Am. Soc. Agronomy, Series Agron., no. 9, p. 545–566.
Deere, D. U., and F. D. Patton, 1971, Slope stability in residual soils: Proc. 4th Pan-American Conf. on Soil Mechanics and Foundations, Caracas, p. 87–171.
Deshpande, T. L., D. J. Greenland, and J. P. Quirk, 1964, Role of iron oxides in the bonding of soil particles: Nature, v. 201, p. 107–108.
Emerson, W. W., 1959, The structure of soil crumbs: Soil Science, v. 10, p. 235.
Emerson, W. W. and G. W. F. Grundy, 1954, The effect of rate of wetting on water uptake and cohesion of soil crumbs: Jour. Agricultural Science, v. 44, p. 249–253.
Harr, R. D., and C. S. Yee, 1975, Soil and hydrologic factors affecting the stability of natural slopes in the Oregon Coast Range: Oregon State Univ., Corvallis, Water Resources Research Inst. Report, WRRI-33, 204 p.
Kemper, W. D., 1965, Aggregate stability,in C. A. Black and others, eds., Methods of soil analysis: Madison, Wisc., Am. Soc. Agronomy, Series Agron., no. 9, p. 511–519.
Kemper, W. D. and W. S. Chepil, 1965, Size distribution of aggregates,in C. A. Black and others, eds., Methods of soil analysis: Madison, Wisc., Am. Soc. Agronomy, Series Agron., no. 9, p. 449–510.
Kemper, W. D. and E. J. Koch, 1966, Aggregate stability of soils from the western portion of the United States and Canada: U.S. Dept. Agric. Tech. Bull. 1355, 52 p.
Lambe, T. W., 1951, Soil testing for engineers: New York, John Wiley and Sons, 165 p.
Lovell, J. P. B., 1969, Tyee formation: undeformed turbidites and their lateral equivalents: mineralogy and paleogeology: Geol. Soc. America Bull., v. 80, no. 1, p. 9–22.
Lutz, J. F., 1936, The relation of free iron on the soil to aggregation. Soil Science Soc. America Proc., v. 1, p. 43–45.
Lutz, J. F. and R. F. Chandler, 1961, Forest soils: New York, John Wiley and Sons, p. 241–244.
Macalla, T. M. 1942, Influence of biological products on soil structure and infiltration: Soil Science Soc. America Proc., v. 7, p. 209–214.
Martin, J. P., 1945, Micro-organisms and soil aggregation, part I: Soil Science, v. 59, p. 163–174.
McIntyre, D. S., 1956. The effect of free ferric oxide on the structure of some terra rosa and rendzina soils: Soil Science, v. 7, p. 302–306.
Saini, G. R., A. A. MacLean, and J. J. Doyle, 1966, The influence of some physical and chemical properties on soil aggregation and responses to VAMA: Canadian Jour. Soil Science, v. 14, p. 267, 281.
Swanston, D. N., 1971, Principal mass movement processes influenced by logging, road building, and fire,in J. T. Krygier and J. D. Hall, eds., Forest land uses and stream environment: Oregon State Univ., Corvallis, Proc. of Conf. Oct. 19–21, 1970, p. 29–39, 252 p.
Terzaghi, K., and R. B. Peck, 1967, Soil mechanics in engineering practice: New York, John Wiley and Sons, 2nd ed. 729 p.
Weldon, T. A., and J. C. Hide, 1942, Some physical properties of soil organic matter and of sesquioxides associated with aggregation in soils: Soil Science, v. 54, p. 343–351.
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Yee, C.S., Harr, R.D. Influence of soil aggregation on slope stability in the Oregon Coast Ranges. Geo 1, 367–377 (1977). https://doi.org/10.1007/BF02380505
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DOI: https://doi.org/10.1007/BF02380505