Need for speed: Preference for fast-flowing water by the endangered semi-aquatic Pyrenean desman (Galemys pyrenaicus ) in two contrasting streams

2018 ◽  
Vol 28 (3) ◽  
pp. 600-609 ◽  
Author(s):  
Amaiur Esnaola ◽  
Jorge González-Esteban ◽  
Arturo Elosegi ◽  
Aitor Arrizabalaga-Escudero ◽  
Joxerra Aihartza
Keyword(s):  
Flowing Water ◽  
Galemys Pyrenaicus

Direct Observation of Heat Exchanger Deposits by Cross Sectioning

1967 ◽  
Vol 25 ◽  
pp. 364-365
Author(s):  
R. W. Anderson ◽  
D. L. Senecal
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Heat Exchanger ◽  
Direct Observation ◽  
Cross Sections ◽  
Preparation Method ◽  
Specimen Preparation ◽  
Flowing Water ◽  
Transmission Electron ◽  
Deposit Layer

A problem was presented to observe the packing densities of deposits of sub-micron corrosion product particles. The deposits were 5-100 mils thick and had formed on the inside surfaces of 3/8 inch diameter Zircaloy-2 heat exchanger tubes. The particles were iron oxides deposited from flowing water and consequently were only weakly bonded. Particular care was required during handling to preserve the original formations of the deposits. The specimen preparation method described below allowed direct observation of cross sections of the deposit layers by transmission electron microscopy.The specimens were short sections of the tubes (about 3 inches long) that were carefully cut from the systems. The insides of the tube sections were first coated with a thin layer of a fluid epoxy resin by dipping. This coating served to impregnate the deposit layer as well as to protect the layer if subsequent handling were required.

Remote turbidity measurement with a laser reflectometer

1998 ◽  
Vol 37 (12) ◽  
pp. 255-261 ◽  
Author(s):  
Mark Johnson
Keyword(s):  
Water Surface ◽  
Free Water ◽  
Optical Scattering ◽  
Flowing Water ◽  
Water Stream ◽  
Water Turbidity ◽  
Water Colour ◽  
Contact Measurement ◽  
Optical Instruments ◽  
Better Than

A simple, laser-based reflectometer is described for the measurement of water turbidity via 180° optical scattering. Applications exist both in clean source waters (0-1000NTU) with a minimum detectable turbidity better than 1NTU, and in dense wastewater primary-clarifier sludges. The non-contact measurement is performed from a distance at least up to 10m, substantially avoiding the usual window fouling problems of optical instruments. By measuring directly in the process, through a free water surface or on the side of a flowing water stream, the difficulties of transporting sample to the instrument are also avoided. Extensions to be described allow measurement also of water colour.

Simultaneously Harvesting Electrostatic and Mechanical Energies from Flowing Water by a Hybridized Triboelectric Nanogenerator

ACS Nano ◽  
2014 ◽  
Vol 8 (2) ◽  
pp. 1932-1939 ◽  
Author(s):  
Gang Cheng ◽  
Zong-Hong Lin ◽  
Zu-liang Du ◽  
Zhong Lin Wang
Keyword(s):  
Triboelectric Nanogenerator ◽  
Flowing Water

A four-year mass balance for a natural wetland system receiving domestic wastewater

1994 ◽  
Vol 30 (8) ◽  
pp. 235-244 ◽  
Author(s):  
M. Hosomi ◽  
A. Murakami ◽  
R. Sudo
Keyword(s):  
Organic Matter ◽  
Removal Rate ◽  
Domestic Wastewater ◽  
Residential Area ◽  
Flowing Water ◽  
Natural Wetland ◽  
N Release ◽  
Main Factors ◽  
Wetland System ◽  
Natural Purification

In order to clarify the natural purification potential of a natural wetland having free-flowing water, we performed a four-year study on such a wetland system which had been receiving for 12 years the domestic wastewater discharged from a residential area comprised of 45 households. The wetland's removal rate of organic matter throughout the four years ranged from 80% for COD to 95% for BOD, whereas the corresponding nitrogen removal rate was comparatively lower. Results indicate that NH4-N release from the bottom sediment and repression of nitrification are the main factors responsible for the wetland's low removal rate of nitrogen during winter. The wetland purification performance even in winter was determined as follows (g m−2 d−1): 2.2 BOD, 0.81 COD, 1.1 TOC, 0.10 T-N, and 0.023 T-P.

Experimental and numerical investigations on reliability of air barrier on oil containment in flowing water

2015 ◽  
Vol 95 (1) ◽  
pp. 200-206 ◽  
Author(s):  
Jinshu Lu ◽  
Zhenfeng Xu ◽  
Song Xu ◽  
Sensen Xie ◽  
Haoxiao Wu ◽  
...  
Keyword(s):  
Flowing Water ◽  
Numerical Investigations

Buoyancy effects on the supersonic steam jet injection into cocurrently and countercurrently flowing water

2021 ◽  
Author(s):  
Afrasyab Khan ◽  
Khairuddin Sanaullah ◽  
Hassan Ali S. Ghazwani ◽  
Atta Ullah ◽  
Andrew Ragai Henry Rigit
Keyword(s):  
Flowing Water ◽  
Jet Injection
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