scholarly journals Coarse sediment transfer and geomorphic changes in an alpine headwater stream

Geomorphology ◽  
2021 ◽  
Vol 376 ◽  
pp. 107569
Author(s):  
D. Oss Cazzador ◽  
R. Rainato ◽  
L. Mao ◽  
L. Martini ◽  
L. Picco
Keyword(s):  
Headwater Stream ◽  
Coarse Sediment ◽  
Sediment Transfer

The effect of excluding plant litter on the aquatic hyphomycete conidia in a headwater stream.

2003 ◽  
Vol 54 (3-4) ◽  
pp. 249-260 ◽  
Author(s):  
Vladislav Gulis ◽  
Keller Suberkropp
Keyword(s):  
Plant Litter ◽  
Headwater Stream

ONSET OF PLEISTOCENE CLIMATE GENERATED A PULSE OF COARSE SEDIMENT, PRESERVED AS THE SHARPYLDAK FORMATION IN THE TIEN SHAN RANGE OF KYRGYZSTAN

2016 ◽  
Author(s):  
Nyle Major Weldon ◽  
◽  
Ray J. Weldon ◽  
Win N.F. McLaughlin ◽  
Samantha S.B. Hopkins ◽  
...  
Keyword(s):  
Tien Shan ◽  
Coarse Sediment ◽  
Pleistocene Climate

scholarly journals Wetland Restoration with Hydrophytes: A Review

Plants ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1035
Author(s):  
Maria A. Rodrigo
Keyword(s):  
Wetland Restoration ◽  
Large Scale ◽  
Emergent Plants ◽  
Filamentous Green Algae ◽  
Vital Functions ◽  
Climatic Scenarios ◽  
Restoration Practices ◽  
Natural Wetlands ◽  
Sediment Transfer ◽  
Negative Factors

Restoration cases with hydrophytes (those which develop all their vital functions inside the water or very close to the water surface, e.g., flowering) are less abundant compared to those using emergent plants. Here, I synthesize the latest knowledge in wetland restoration based on revegetation with hydrophytes and stress common challenges and potential solutions. The review mainly focusses on natural wetlands but also includes information about naturalized constructed wetlands, which nowadays are being used not only to improve water quality but also to increase biodiversity. Available publications, peer-reviewed and any public domain, from the last 20 years, were reviewed. Several countries developed pilot case-studies and field-scale projects with more or less success, the large-scale ones being less frequent. Using floating species is less generalized than submerged species. Sediment transfer is more adequate for temporary wetlands. Hydrophyte revegetation as a restoration tool could be improved by selecting suitable wetlands, increasing focus on species biology and ecology, choosing the suitable propagation and revegetation techniques (seeding, planting). The clear negative factors which prevent the revegetation success (herbivory, microalgae, filamentous green algae, water and sediment composition) have to be considered. Policy-making and wetland restoration practices must more effectively integrate the information already known, particularly under future climatic scenarios.

scholarly journals Hydrogeochemical Processes Limiting Aqueous and Colloidal Fe Export in a Headwater Stream Impaired by Acid Mine Drainage

2020 ◽  
Author(s):  
Lindsey D. Yazbek ◽  
Kortney A. Cole ◽  
Allie Shedleski ◽  
David Singer ◽  
Elizabeth M. Herndon
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Headwater Stream ◽  
Hydrogeochemical Processes ◽  
Acid Mine

scholarly journals Yield Stress Model for Natural Debris Flows in Presence of Fine and Coarse–Grained Sediments

Water ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 1865
Author(s):  
Leonardo Schippa
Keyword(s):  
Yield Stress ◽  
Debris Flows ◽  
Rheological Behaviour ◽  
Coarse Fraction ◽  
Coarse Grained ◽  
Stress Model ◽  
Coarse Sediment ◽  
Fine Grain ◽  
Sediment Fraction ◽  
Coarse To Fine

When dealing with natural geo–hazards, it is important to understand the influence of sediment sorting on debris flows. The presence of coarse fraction is one of the aspects which affects the rheological behaviour of natural viscous granular fluid mixtures. In this paper, experiments on reconstituted debris flow mixtures with different coarse–to–fine sediment ratios are considered. Such mixtures behave just as non–Newtonian yield stress fluids and their rheological behaviour is largely affected by the presence of coarse fraction. Experimental results demonstrate that yield stress is very sensitive not only to bulk sediment concentration but also to coarse sediment fraction. A novel yield stress model is presented. It accounts for an empirical grading function depending on the coarse–to–fine grain content. The yield stress model performed satisfactorily in comparison with the experiments, showing that it is almost independent of the coarse–to–fine grain fraction in case of dominant coarse sediment content.

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