Assessment of the geo‐eco‐hydrological condition of anabranching reaches in the Source Zone of the Yellow River, western China

2021 ◽  
Author(s):  
Meiqin Han ◽  
Gary Brierley
Keyword(s):  
Yellow River ◽  
Source Zone ◽  
Western China ◽  
The Yellow River ◽  
Hydrological Condition

scholarly journals Vegetative impacts upon bedload transport capacity and channel stability for differing alluvial planforms in the Yellow River Source Zone

2016 ◽  
Author(s):  
Z. W. Li ◽  
G. A. Yu ◽  
G. Brierley ◽  
Z. W. Wang
Keyword(s):  
Riparian Vegetation ◽  
Yellow River ◽  
Bedload Transport ◽  
Sediment Supply ◽  
Source Zone ◽  
Western China ◽  
Tibet Plateau ◽  
Transport Capacity ◽  
Channel Stability ◽  
Braided Reach

Abstract. The influence of vegetation upon bedload transport and channel morphodynamics is examined along a channel stability gradient ranging from meandering through anabranching through anabranching-braided to fully braided planform conditions along trunk and tributary reaches of the Upper Yellow River in western China. Although the regional geology and climate are relatively consistent across the study area, there is a distinct gradient in the presence and abundance of riparian vegetation for these reaches atop the Qinghai-Tibet Plateau (elevations in the study area range from 2800–3400 m a.s.l.). The hydraulic and geomorphic role of riparian vegetation varies as follows: trees exert the strongest influence in the anabranching reach, the meandering reach flows through meadow vegetation, the anabranching-braided reach has a grass, herb, and sparse shrub cover, and the braided reach has no riparian vegetation. A non-linear relation between vegetative cover on the valley floor and bedload transport capacity is evident, wherein bedload transport capacity is highest for the anabranching reach, followed by the anabranching-braided, braided and meandering reaches respectively. The relationship between the bedload transport capacity of a reach and sediment supply from upstream exerts a significant influence upon channel stability. Bedload transport capacity during the flood season (June–September) in the braid ed reach is much less than the rate of sediment supply, inducing bed aggradation and dynamic channel adjustments. Rates of channel adjustment are less pronounced for the anabranching-braided and anabranching reaches, while the meandering reach is relatively stable (i.e. this is a passive meandering reach).

scholarly journals Streamflow variations of the Yellow River over the past 593 years in western China reconstructed from tree rings

2007 ◽  
Vol 43 (6) ◽  
Author(s):  
Xiaohua Gou ◽  
Fahu Chen ◽  
Edward Cook ◽  
Gordon Jacoby ◽  
Meixue Yang ◽  
...  
Keyword(s):  
Tree Rings ◽  
Yellow River ◽  
Western China ◽  
The Yellow River ◽  
The Past
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