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| Spatial distribution characteristics of soil infiltration capacity in water conservation forest in Lianhua Lake reservoir area |
| Yan Yongqiang,Duan Wenbiao,Wang Jing |
| College of Forestry,Northeast Forestry University,150040,Harbin,China |
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Abstract Based on water conservation forest of Pinus koraiensis in Lianhua Lake reservoir area,soil infiltration model firstly was fitted by the rate of soil infiltration speed,spatial distribution characteristics of the parameters of infiltration model were analyzed by geostatistical method secondly.The results show that the Philip infiltration model has better analog calculation effects on mathematical simulation of soil infiltration than other models.Soil suction rate and steady infiltration rate obtained by fitting both show lognormal distribution.The proportion of the former is 0.773,and that of the latter is 0.678.The effective range of the former is 8.04 m,and that of the latter is 6.69 m.The fractal statistic of the former is 1.954,and that of the latter is 1.978.By comparison between two parameters,soil suction rate has a strong spatial dependence,a large spatial correlation range and a simple spatial distribution.There is a very significantly positive correlation between the spatial distribution patterns of soil suction rate and that of steady infiltration rate,and the correlation coefficient <i>R</i> is 0.52.
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Received: 20 November 2007
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