土地利用/土地覆被对人地系统的影响分析--以河南省巩义市3个不同类型村为例

运用盒子计数法分别计算了河南省巩义市吴沟村、滹沱村、孝南村三个不同类型村域各土地利用/土地覆被及村域所有土地类型的盒子数,通过建立相应的回归模型,求出调研村域各土地类型空间分布的分维值,并讨论了其分形性质。通过各土地类型分维值与村域人地关系系统熵值的相关分析,得出土地利用/土地覆被对人地系统具有较显著的影响。研究结果表明,吴沟村、滹沱村、孝南村土地类型总体分维值依次增大,分别为1.731 7,1.821 4,1.844 8。一般情况下,随着村域社会经济发展水平的提高,人类改造自然的能力得到显著增强,土地覆被的破碎化程度也在逐渐加大。村域人地系统的稳定程度与村域土地利用/土地覆被的不规则性、破碎化程度呈负相关关系;与村域中自然系统的土地利用类型呈现多样化的特征;与村域中人工系统的土地利用类型呈高度负相关。

Impact of LULC on Human-land Systems:a Micro-study of Three Villages in Gongyi City,Henan Province

A micro-level input-output analysis on farming fields is important in understanding the human-land relationship in rural area.A survey was undertaken in the three villages of Wugou,Hutuo and Xiaonan in Gongyi city,Henan Province in April 2003.Data collected include some attributes for each type of land.Fractal dimension values of each type of land use and land cover and total value of the village surveyed are calculated at three villages of Wugou,Hutuo and Xiaonan in Gongyi city,Henan province in the year of 2002.By employing a corresponding regression model and calculating its value of fractal dimension of each types of land,their characteristics are discussed from some angles.By analyzing the correlation of the fractal dimension value and the system entropy of each village,the situation of land use and land cover has a remarkable effect on the human-land system of each village.Fractal dimension is the characteristic parameter which generally shows the information of the land cover and its changes and the threshold of fractal dimension is 0