Clustering stream profiles to understand the geomorphological features and evolution of the Yangtze River by using DEMs

Stream morphology is an important indicator for revealing the geomorphological features and evolution of Yangtze River. Existing studies on River focus planar features. However, vertical are also important. Vertical mainly control flow ability erosion intensity. Furthermore, traditional often a few stream profiles in linked together by runoff nodes, thus affecting naturally. In this study, clustering method proposed plotting all together. Then, index used to investigate profile clusters reveal Based clusters, base generally changes from steep gentle upper reaches lower reaches, degree low high. The asymmetric distribution knickpoints Hanshui Basin supports view that boundary eastward growth Tibetan Plateau has reached vicinity Daba Mountains.