scholarly journals Daily entropy of dissolved oxygen reveals different energetic regimes and drivers among high‐mountain stream types

2020 ◽  
Author(s):  
Marta Boix Canadell ◽  
Lluís Gómez‐Gener ◽  
Mélanie Clémençon ◽  
Stuart N. Lane ◽  
Tom J. Battin
Keyword(s):  
Dissolved Oxygen ◽  
Mountain Stream ◽  
High Mountain

scholarly journals Sediment budget of high mountain stream channels in an arid zone (High Atlas mountains, Morocco)

CATENA ◽  
2020 ◽  
Vol 190 ◽  
pp. 104530
Author(s):  
Elżbieta Rojan ◽  
Maciej Dłużewski ◽  
Kazimierz Krzemień
Keyword(s):  
Arid Zone ◽  
Sediment Budget ◽  
Mountain Stream ◽  
High Mountain ◽  
Stream Channels ◽  
High Atlas ◽  
Atlas Mountains ◽  
High Atlas Mountains

Body P content increases over ontogeny in hemimetabolous macroinvertebrates in a Mediterranean high mountain stream

2020 ◽  
Author(s):  
Manuel Villar-Argaiz ◽  
Manuel Jesús López-Rodríguez ◽  
José Manuel Tierno de Figueroa
Keyword(s):  
Mountain Stream ◽  
High Mountain ◽  
P Content

Disturbances in coarse bedload transport in a high-mountain stream channel system (Western Tatras, Poland)

Geomorphology ◽  
2020 ◽  
Vol 371 ◽  
pp. 107428
Author(s):  
Eliza Płaczkowska ◽  
Kazimierz Krzemień ◽  
Elżbieta Gorczyca ◽  
Anna Bojarczuk ◽  
Mirosław Żelazny
Keyword(s):  
Bedload Transport ◽  
Mountain Stream ◽  
High Mountain ◽  
Stream Channel ◽  
Channel System

scholarly journals Erosion rates deduced from seasonal mass balance along the upper Urumqi River in Tianshan

Solid Earth ◽  
2011 ◽  
Vol 2 (2) ◽  
pp. 283-301 ◽  
Author(s):  
Y. Liu ◽  
F. Métivier ◽  
J. Gaillardet ◽  
B. Ye ◽  
P. Meunier ◽  
...  
Keyword(s):  
Mass Balance ◽  
Central Asia ◽  
Chemical Weathering ◽  
Annual Runoff ◽  
Mountain Stream ◽  
High Mountain ◽  
Mountain Range ◽  
Cosmogenic Dating ◽  
Denudation Rates ◽  
Sand And Gravel

Abstract. We report measurements performed during two complete flow seasons on the Urumqi River, a proglacial mountain stream in the northeastern flank of the Tianshan, an active mountain range in Central Asia. This survey of flow dynamics and sediment transport (dissolved, suspended and bed loads), together with a 25-year record of daily discharge, enables the assessment of secular denudation rates on this high mountain catchment of Central Asia. Our results show that chemical weathering accounts for more than one-third of the total denudation rate. Sediment transported as bed load cannot be neglected in the balance, given that sand and gravel transport accounts for one third of the solid load of the river. Overall, the mean denudation rates are low, averaging 46 t × km−2 × yr−1(17–18 m Myr−1). We furthermore analyse the hydrologic record to show that the long-term sediment budget is not dominated by extreme and rare events but by the total amount of rainfall or annual runoff. The rates we obtain are in agreement with rates obtained from the mass balance reconstruction of the Plio-Quaternary gravely deposits of the foreland but signicantly lower than the rates recently obtained from cosmogenic dating of the Kuitun River sands, west of the Urumqi River. We show that the resolution of this incompatibility may have an important consquence for our understanding of the interplay between erosion and tectonics in the semi-humid ranges of Central Asia.

Macroinvertebrates of a Colorado High Mountain Stream

1980 ◽  
Vol 25 (1) ◽  
pp. 23 ◽  
Author(s):  
Robert A. Short ◽  
James V. Ward
Keyword(s):  
Mountain Stream ◽  
High Mountain

Algal Colonization under Four Experimentally-Controlled Current Regimes in High Mountain Stream

1990 ◽  
Vol 9 (4) ◽  
pp. 303-318 ◽  
Author(s):  
N. LeRoy Poff ◽  
Neal J. Voelz ◽  
J. V. Ward ◽  
R. E. Lee
Keyword(s):  
Mountain Stream ◽  
High Mountain

scholarly journals Peculiar arsenic, copper, nickel, uranium, and yttrium-rich stone coatings in a high mountain stream in the Austrian Alps

2018 ◽  
Vol 110 (2) ◽  
Author(s):  
Hansjörg Thies ◽  
Ulrike Nickus ◽  
Richard Tessadri ◽  
Peter Tropper ◽  
Karl Krainer
Keyword(s):  
Mountain Stream ◽  
High Mountain ◽  
Copper Nickel ◽  
Austrian Alps ◽  
Arsenic Copper

scholarly journals Effects of Physicochemical Variables of Superficial Waters on the Abundance of the North African Freshwater Crab Potamon algeriense (Bott, 1967)

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Soufiane Fadlaoui ◽  
Ouahid El Asri ◽  
Mustapha Bouterfas ◽  
Mohammed Melhaoui
Keyword(s):  
Organic Matter ◽  
Dissolved Oxygen ◽  
Water Temperature ◽  
Suspended Matter ◽  
Mountain Stream ◽  
Freshwater Crab ◽  
Physicochemical Variables ◽  
The North ◽  
Global Quality ◽  
Nitrite Nitrate

The large number of pollutants discharged into the aquatic environment may influence the physicochemical and biological qualities of the aquatic ecosystem. This study discloses the global quality of the surface waters and the effect of physicochemical variables on the abundance of the African freshwater crab Potamon algeriense inhabiting Zegzel watercourse, a mountain stream in the northeast of Morocco. Physicochemical variables including streamflow, water temperature, pH, dissolved oxygen, suspended matter, chloride, calcium, magnesium, ammonia, nitrite, nitrate, orthophosphate, and organic matter were evaluated monthly for one year (October 2017–September 2018). The evaluation of the physicochemical quality showed that the waters of all the stations studied are between the excellent and good quality classes concerning all the physicochemical variables and highlights also two variations with a tendency towards degradation, one spatial from upstream to downstream and the other seasonal from the wet to the dry period. The abundance of crabs was recorded to exhibit a positive correlation with dissolved oxygen, calcium (N = 44) (p < 0.01), and magnesium. However, a negative correlation has been noticed for streamflow (N = 1) (p < 0.01), water temperature, pH, suspended matter, chloride, ammonia, nitrite, nitrate, orthophosphate, and organic matter. The results obtained reveal that besides the biotic variables, the distribution of P. algeriense also depends on these specific environmental variables.

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