Results 21 to 30 of about 5,030,159 (295)

Lake Modeling Reveals Management Opportunities for Improving Water Quality Downstream of Transboundary Tropical Dams

open access: yesWater Resources Research, 2021
Water quality in tropical rivers is changing rapidly. The ongoing boom of dam construction for hydropower is one of the drivers for this change. In particular, the stratification in tropical reservoirs induces oxygen deficits in their deep waters and ...
Elisa Calamita   +3 more
doaj   +1 more source

Coupling remote sensing and particle tracking to estimate trajectories in large water bodies

open access: yesInternational Journal of Applied Earth Observations and Geoinformation, 2022
Propelled by the rapid development of equipment, technology and computational power, the monitoring and simulation of the hydrodynamics in lakes have steadily advanced.
Chaojie Li   +4 more
doaj   +1 more source

Accounting for surface waves improves gas flux estimation at high wind speed in a large lake [PDF]

open access: yesEarth System Dynamics, 2021
The gas transfer velocity (k) is a major source of uncertainty when assessing the magnitude of lake gas exchange with the atmosphere. For the diversity of existing empirical and process-based k models, the transfer velocity increases with the level of ...
P. Perolo   +6 more
doaj   +1 more source

Diazotrophic Cyanobacteria are Associated With a Low Nitrate Resupply to Surface Waters in Lake Tanganyika

open access: yesFrontiers in Environmental Science, 2021
In Lake Tanganyika, blooms of nitrogen-fixing (diazotrophic) cyanobacteria emerge, when the upper water column re-stratifies after a period of upwelling and convective mixing.
Benedikt Ehrenfels   +19 more
doaj   +1 more source

Lake mixing regime selects apparent methane oxidation kinetics of the methanotroph assemblage [PDF]

open access: yesBiogeosciences, 2020
In lakes, large amounts of methane are produced in anoxic sediments. Methane-oxidizing bacteria effectively convert this potent greenhouse gas into biomass and carbon dioxide.
M. J. Mayr   +7 more
doaj   +1 more source

Surface freezing of water

open access: yesSpringerPlus, 2016
Freezing, melting, evaporation and condensation of water are essential ingredients for climate and eventually life on Earth. In the present work, we show how surface freezing of supercooled water in an open container is conditioned and triggered-exclusively-by humidity in air. Additionally, a change of phase is demonstrated to be triggered on the water
Pérez-Díaz, J. L.   +2 more
openaire   +2 more sources

Contamination of surface waters by mining wastes in the Milluni Valley (Cordillera Real, Bolivia): Mineralogical and hydrological influences [PDF]

open access: yes, 2008
This study is one of very few dealing with mining waste contamination in high altitude, tropical-latitude areas exploited during the last century. Geochemical, mineralogical and hydrological characterizations of potentially harmful elements (PHEs) in ...
Salvarredy-Aranguren, Matias Miguel   +4 more
core   +1 more source

Optical remote sensing of large-scale water pollution in Angola and DR Congo caused by the Catoca mine tailings spill

open access: yesInternational Journal of Applied Earth Observations and Geoinformation, 2023
Billions of tons of hazardous mine waste are stored in thousands of tailings storage facilities around the world. These impoundments represent one of the most important environmental risk factors of industrial mining, since occasional tailings spills or ...
Désirée Ruppen   +4 more
doaj   +1 more source

Estimation of deep infiltration in unsaturated limestone environments using cave lidar and drip count data [PDF]

open access: yesHydrology and Earth System Sciences, 2016
Limestone aeolianites constitute karstic aquifers covering much of the western and southern Australian coastal fringe. They are a key groundwater resource for a range of industries such as winery and tourism, and provide important ecosystem services such
K. Mahmud   +5 more
doaj   +1 more source

The Water-surface “Halo.” [PDF]

open access: yesNature, 1913
THE “Halo.” which a happy memory of eighty years enables the Rev. O. Fisher to recall in NATURE of February 6 was probably one to which the explanation offered by Dr. Franklin Parsons does not apply.
openaire   +1 more source

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