Abstract: With the application of RS and GIS techniques, as well as the QuickBird images with spatial resolution of 0.61 m, fractal theory was employed to study the relationships between the area effect of patches and the fractal of land cover in Kaifeng City, and the prominence of the difference of fragmentation distribution was analyzed. The results showed that shelterbelt and farmland occupied larger area and had larger fractal dimension, while the fractal dimension of water body was smaller, indicating that the patch structure of shelterbelt and farmland was more complex than that of water body. The fractal dimension of patch was scale dependent. The same type of medium and large patches always had larger fractal dimension, because inlaid patches often existed in these patches but rarely in the smaller one.

Key words: Soil redistribution, Cesium-137 (¹³⁷Cs), Calibration models, Black soils, Northeast China