Saturated conductivity and effective porosity of the forest soil

Abstract

Soil samples were taken from different soil depth of different forest soil story in the Natural Reserve of Changbai Mountain, and their saturated conductivity and effective porosity were measured. The variation of saturated conductivity and effective porosity with different soil depth were studied by regressive analysis and a logarithmic model. The results were compared with the exponential model (Beven 1982). The results of comparison showed that the logarithmic model was more accurate and reasonable than the exponential model for forest catchment.

References

[1] Beven K.. On subsurface stomflow prediction with simple kinematic theory for saturated and unsaturated flows. Water Resour. Res., 1982, 18(6): 1627-1633.

[2] Binley A., Beven K.. Three-dimensional modeling of hillslope hydrology. Hydrological Processes, 1992, 6: 347-359.

[3] Binley A., et al. A physically based model of heterogeneous hillslopes 2. Effective hydraulic conductivities. Water Resour. Res., 1989, 25(6): 1219-1226.

[4] Cabral M.C., et al. A kinematic model of infiltration and runoff generation in layered and sloped soil. Advances In Water Resources, 1992, 15: 311-324.

[5] Borong Chang, et al. The main soil groups and their properties of the natural reserve on northem slope of Changbai Mountain. Research of forest ecosystem, 1981, 2: 187-195. (in Chinese)

[6] Indelman P.. Flow in heterogeneous media displaying a linear trend in the log conductivity. Water Resour. Res., 1995, 21(5): 1257-1265.

[7] Kosugi K.. Lognomal distribution model for unsaturated soil hydraulic properties. Water Resour. Res., 1996, 32(9): 2697-2703.

[8] Kubota J., Sivapalan M.. Towards a catchment-scale model of subsurface runoff generation based on synthesis of small-scale process-based modeling and field studies. Hydrological Processes, 1995, 9: 541-554.

[9] Xuehua Ma. Forest hydrology. 1993, Beijing: Chinese Forestry Press

[10] Paleologos E. K., et al. Effective hydraulic conductivity of bounded, strongly heterogeneous porous media. Water Resour. Res., 1996, 32(5): 1333-1341.

[11] Tiefan Pei, et al. A mathematical model of infiltration coefficient of forest soil. Research of forest ecosystem. 1981, Beijing: Chinese Forestry Press, 187 195 (in Chinese)

[12] Robinson J. S., Sivapalan M.. Instantaneous response functions of overland flow and subsurface stormflow for catchment models. Hydrological Processes, 1996, 10: 845-862.

[13] Smith R. E., Diekkruger B.. Effective soil water characteristics and ensemble soil water profiles in heterogeneous soil. Journal of Geophysical Research, 1996, 32(7): 1993-2002.

[14] Wenyan Wang, et al. Research of experiment of measuring different parameters of unsaturated flow of soil water simultaneously on one horizontal soil column. Journal of water conservancy, 1990, 7: 26-30. (in Chinese)