基于GIS技术的秦淮河流域水系分维研究

On the dimensions of Qinhuai river networksbased on the GIS technology

流域水系是一种自然分形,基于GIS技术在MapInfo和MapBasic平台下,采用编程手段,通过改变粗视化程度求维数的数盒子法求取了秦淮河流域水系的盒维数,并在此基础上讨论了水系分维的意义。指出水系的分维不仅反映了该流域水系的发育程度,而且和流域的地貌系统、土地利用以及道路网都有着密切的关系。

The river networks is a kind of natural fractal This article discusses mainly how to get the dimension of a river network by counting the boxes which covers the river networks in the mean while by changing the side of the boxes All of these are based on the MapInfo and MapBasic which can program the computer to do the job instead of manual operation and can get much more comprehensive information of the dimension of the river networks By this way, the article points out that the fractal dimension of network is related not only to the development phase of the river but also to the system of physiognomy, land use and so on