全国河流的密度统计方法

Statistics Method of River Density in the Country

河流水系是重要的基础地理要素之一,也是一个基本的水文参数,是描述一个地区地理地貌和水文特征时不可或缺的条件之一,而河流密度是流域结构特征的一个重要指标。探讨适合的方法,统计分析全国范围内的河流密度是本次研究的目标,通过分析比较,综合"在地形图上进行量测和分析获取河流密度"和"GIS空间分析获取河流密度"2种方法在全国范围内分区域进行河流密度的统计、分析,最后得出结论。

The river system is an important geographic element and a basic hydrological parameter;it is one of the indispensable conditions in describing the geography,geomorphology and hydrological characteristics of an area,while river density is an important index of the structure characteristics of river basin.The purpose of this text is to count and analyze the nationwide density of river with suitable methods,it makes statistics and analysis of river density in different regions of the country with two methods of ' measurement on topographic map and analysis to obtain the river density' and ' GIS spatial analysis to obtain the river density',and finally draws the conclusion.