【摘要】 文中运用盒子计数法分别计算了河南省洛宁县森林覆被类型及区域所有森林覆被空间分布的分维值 ,并讨论了森林覆被及其变化的分形性质。研究结果表明 ,森林覆被具有统计自相似性 ,是一类随机分形 ;分维是表征森林覆被及其变化空间结构信息的特征参数 ,值域为 0 <D <2 ,在一定范围内分维值越大表明森林覆被愈复杂、愈不规则 ;分维值的大小与森林面积、斑块数量和平均斑块面积等项指标没有直接关系 ,而是三者有机结合的综合表现。更多还原

【Abstract】 Fractal dimension values of each type of forest cover and total forest area are calculated at Luoning county in Henan province in 1983 and 1999. Furthermore, properties of fractal geometry of forest cover and its change are discussed. The research indicates that the forest cover has statistical self similarity and its fractal dimension value is a kind of random fractal geometry. Fractal dimension is the characteristic parameter which generally shows the information of the forest cover and its changes and the threshold of fractal dimension is 0< D <2. Bigger fractal dimension value indicates that the forest spatial distribution is more irregular and more complex. The quantity of fractal dimension has no direct relation with the forest patch and the average area of each patch, instead it is the comprehensive index of them.更多还原