期刊论文

中文

地球信息科学学报

1560-8999

2015

17

6

689-697

10.3724/SP.J.1047.2015.00689

41201398:国家自然科学基金 41401440:国家自然科学基金 12JJ7003:湖南省自然科学基金

本校为第一机构

径流节点是一种真实存在于流域单元中的地学实体对象,携带了大量的水文与地貌特征信息。针对当前研究中缺乏定量地度量径流节点所承载的地学特征信息量的相关探讨,本文结合径流节点的已有理论,总结了其地学特征信息,借鉴数学粗集理论提出了径流节点的特征信息指数(FIIRN),并分析了相关的定义与计算方法。本文以黄土高原的7个典型黄土地貌样区5 m分辨率DEM数据为实验材料,提取了各个实验样区的径流节点,并计算了每个样区的FIIRN指数值。实验结果表明:(1)FIIRN指数可有效地映射流域单元的径流分级、发育状况等地学特征信息;(2)FIIRN指数可定量地表达流域单元的地学特征信息量;(3)FIIRN指数可作为挖...

Runoff nodes, which could be captured from every watershed on earth, are one type of the real geo- graphical entities within the river-network. Generally, runoff nodes often locate at sites where lower grade of run- offs merging themselves into a more advanced trunk stream. It is clear that runoff nodes carry a lot of hydraulic and landform information. Although many reports have documents related to runoff nodes, the quantitative mea- suring researches, that concerning the geographical information of runoff nodes and taking advantages of valid...