长江黄河源区河流地貌多样性与河谷特征的关系(英文)

编号 zgly0001585325

文献类型 期刊论文

文献题名 长江黄河源区河流地貌多样性与河谷特征的关系(英文)

作者 余国安  刘乐  李志威  李艳富  黄河清  GaryBRIERLEY  BrendonBLUE  王兆印  潘保柱 

作者单位 KeyLaboratoryofWaterCycleandRelatedLandSurfaceProcesses  InstituteofGeographicSciencesandNaturalResourcesResearch  CAS  StateKeyLaboratoryofHydroscienceandEngineering  TsinghuaUniversity  SchoolofEnvironment  UniversityofAucklan 

母体文献 Journal of Geographical Sciences 

年卷期 2013年05期

年份 2013 

分类号 P931.1 

关键词 valleysetting  fluvialmorphology  riverpatterns  spatialdistribution  sourceregionoftheYangtzeandYellowRivers 

文摘内容 The spatial distribution of valley setting (laterally-unconfined, partly-confined, or confined) and fluvial morphology in the source region of the Yangtze and Yellow Rivers is contrasted and analyzed.The source region of the Yangtze River is divided into 3 broad sections (Ⅰ, Ⅱ and Ⅲ) based on valley setting and channel gradient, with the upstream and downstream sections being characterized by confined (some reaches partly-confined) valleys, while the middle section is characterized with wide and shallow, laterally-unconfined valleys.Gorges are prominent in sections Ⅰ and Ⅲ, while braided channel patterns dominate section Ⅱ.By contrast, the source region of the Yellow River is divided into 5 broad sections (sections Ⅰ-Ⅴ) based on valley characteristics and channel gradient.Sections Ⅰ, Ⅱ and Ⅳ are alluvial reaches with mainly laterally-unconfined (some short reaches partly-confined) valleys.Sections Ⅲ and Ⅴ are mainly confined or partly-confined.Greater morphological diversity is evident in the source region of the Yellow River relative to the upper Yangtze River.This includes braided, anabranching, anastomosing, meandering and straight alluvial patterns, with gorges in confined reaches.The macro-relief (elevation, gradient, aspect, valley alignment and confinement) of the region, linked directly to tectonic movement of the Qinghai-Tibet Plateau, tied to climatic, hydrologic and biotic considerations, are primary controls upon the patterns of river diversity in the region.