scholarly journals Topographic, Hydraulic, and Vegetative Controls on Bar and Island Development in Mixed Bedrock‐Alluvial, Multichanneled, Dryland Rivers

2020 ◽  
Vol 56 (5) ◽  
Author(s):  
D. J. Milan ◽  
S. Tooth ◽  
G. L. Heritage
Keyword(s):  
Dryland Rivers

scholarly journals Author Correction: Identifying threshold responses of Australian dryland rivers to future hydroclimatic change

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Z. T. Larkin ◽  
T. J. Ralph ◽  
S. Tooth ◽  
K. A. Fryirs ◽  
A. J. R. Carthey
Keyword(s):  
Hydroclimatic Change ◽  
Dryland Rivers

scholarly journals Dynamic contributions of intermittent and perennial streams to fish beta diversity in dryland rivers

2019 ◽  
Vol 46 (10) ◽  
pp. 2311-2322 ◽  
Author(s):  
Jane S. Rogosch ◽  
Julian D. Olden
Keyword(s):  
Beta Diversity ◽  
Dryland Rivers

scholarly journals Ecological impacts of invasive carp in Australian dryland rivers

2019 ◽  
Vol 29 (11) ◽  
pp. 1870-1889 ◽  
Author(s):  
Jonathan C. Marshall ◽  
Joanna J. Blessing ◽  
Sara E. Clifford ◽  
Kate M. Hodges ◽  
Peter M. Negus ◽  
...  
Keyword(s):  
Ecological Impacts ◽  
Dryland Rivers

scholarly journals Morphodynamic simulation of sediment deposition patterns on a recently stripped bedrock anastomosed channel

2018 ◽  
Vol 377 ◽  
pp. 51-56 ◽  
Author(s):  
David Milan ◽  
George Heritage ◽  
Neil Entwistle ◽  
Stephen Tooth
Keyword(s):  
National Park ◽  
Sediment Deposition ◽  
Low Flow ◽  
Field Observations ◽  
Deposition Patterns ◽  
High Magnitude ◽  
Vegetation Establishment ◽  
Olifants River ◽  
Flow Stage ◽  
Dryland Rivers

Abstract. Some mixed bedrock-alluvial dryland rivers are known to undergo cycles of alluvial building during low flow periods, punctuated by stripping events during rare high magnitude flows. We focus on the Olifants River, Kruger National Park, South Africa, and present 2-D morphodynamic simulations of hydraulics and sediment deposition patterns over an exposed bedrock anastomosed pavement. We examine the assumptions underlying a previous conceptual model, namely that sedimentation occurs preferentially on bedrock highs. Our modelling results and local field observations in fact show that sediment thicknesses are greater over bedrock lows, suggesting these are the key loci for deposition, barform initiation and island building. During peak flows, velocities in the topographic lows tend to be lower than in intermediate topographic areas. It is likely that intermediate topographic areas supply sediment to the topographic lows at this flow stage, which is then deposited in the lows on the falling limb of the hydrograph as velocities reduce. Subsequent vegetation establishment on deposits in the topographic lows is likely to play a key role in additional sedimentation and vegetation succession, both through increasing the cohesive strength of alluvial units and by capturing new sediments and propagules.

scholarly journals Hydrological and Climatic Changes in Deserts of China since the Late Pleistocene

2010 ◽  
Vol 73 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Xiaoping Yang ◽  
Louis A. Scuderi
Keyword(s):  
Climate Changes ◽  
Climatic Changes ◽  
Western China ◽  
Special Issue ◽  
Monsoon Climate ◽  
Complex Interactions ◽  
Aeolian Dunes ◽  
The Last Glacial Maximum ◽  
Dryland Rivers ◽  
The Last Glacial

Large areas in western China were wetlands or less arid between 40 and 30 ka, corresponding to the “Greatest Lake Period” on the adjacent Tibetan Plateau. During the last glacial maximum, some of these western Chinese deserts again experienced wetter conditions; however, at the same time the sandy lands in the eastern Chinese desert belt experienced an activation of aeolian dunes. While interpretations of the mid-Holocene environment in the deserts of China are controversial, it is quite likely that it was more humid not only in the eastern areas influenced by monsoon climate systems but also in the western deserts where moisture is currently associated with westerlies. Evaluation of lacustrine records in the lakes recharged by dryland rivers and the complex interactions of these systems, as well as other paleoenvironmental proxies such as the Artemisia/Chenopodiaceae ratio, should be interpreted with greater caution. Facing the highlighted uncertainties in our understanding of climate changes in Chinese deserts, it is hoped that this special issue will improve our knowledge considerably.

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