摘要
以莲花湖库区红松水源涵养林为研究对象,由入渗速率拟合入渗模型,运用地统计学理论与方法对模型参数进行空间异质性分析。结果表明:采用Philip公式对入渗过程进行数学模拟最佳,模型参数吸渗率和稳渗率均服从对数正态分布,结构比分别为0.773、0.678,变程分别为8.04和6.69 m,分维数分别为1.954、1.978。二者相比,吸渗率空间依赖性强,空间相关范围大,空间分布较简单,在空间分布格局上二者呈极显著正相关关系,相关系数R为0.52。
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 R is 0.52.
出处
《中国水土保持科学》
CSCD
2008年第3期88-93,共6页
Science of Soil and Water Conservation
基金
黑龙江省"十一五"重大科技攻关项目"重要水源地植被恢复
重建及优化调控技术研究"(GA06B302-2)
关键词
水源涵养林
土壤入渗
地统计学
空间异质性
莲花湖
water conservation forest
soil infiltration
geostatistics
spatial heterogeneity
Lianhua Lake
