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研究水系分维与中国气候特征(降水量、干旱指数)的关系。采用计盒法,基于数字高程模型(DEM)和计盒法计算水系分维的不确定性,使用统一参数(汇流面积、盒子边长变化范围和变化倍数)计算了中国不同气候区20个流域的水系分维,并与其他文献对比。结果表明:湿润半湿润地区流域的水系分维较干旱半干旱地区高,半湿润地区流域的水系分维较湿润地区略高;水系分维和干旱指数有较好的相关性。对计算方法的规范可以提高不同流域水系分维间的可比性。
To study the relationship between the fractal dimension of water system and the climatic characteristics of China (precipitation, drought index). The box-counting method was used to calculate the fractal dimension of water system based on the digital elevation model (DEM) and the box-counting method. Using the uniform parameters (confluence area, the change range of the length of the box and the changing multiple) The fractal dimension of water system was compared with other literatures. The results show that the fractal dimension of water system in the humid and semi-humid areas is higher than that in the arid and semi-arid areas. The fractal dimension of water system is slightly higher in the humid and semi-humid areas. The fractal dimension and drought index of the water systems are better correlated. The specification of calculation method can improve the comparability of fractal dimensions of different river basins.