摘要
介绍了水系分维估算的主要方法。基于数字高程模型(DEM),运用A rcV IEW 3.2的水文分析模块,根据不同的集水面积阈值,提取了九龙江流域河网信息,通过网格法计算了相应的水系分维。根据集水面积阈值与水系分维的相互关系,确定该流域水系分维值为1.086。与传统方法相比,这种水系分维的估算方法,具有简便、准确等优点。
The main method of calculation of the fractal dimension in river basin is introduced. Based on DEM, the information of river networks of Jiulongjiang River Basin is extracted, according to the different catchment threshold values and using the hydrologic analysis model by Arc VIEW 3.2. Through the grid method calculated, the fractal dimension of the river networks is calculated. Based on the relationship between different catchment threshold values and fractal dimensions, the fractal dimension of Jiulongjiang basin determined is 1. 086. Compared with the traditional method, this calculating method has the advantages as simplity and accurity.
出处
《水资源与水工程学报》
2009年第1期29-32,共4页
Journal of Water Resources and Water Engineering
基金
福建省重点学科(自然地理学)建设项目子项目(2004年)
关键词
分维
水系
集水面积阈值
DEM
九龙江流域
fractal dimension
river system
catchment threshold values
DEM
Jiulongjiang River Basin
