scholarly journals Characterizing riverbed sediment using high-frequency acoustics: 2. Scattering signatures of Colorado River bed sediment in Marble and Grand Canyons

2014 ◽  
Vol 119 (12) ◽  
pp. 2692-2710 ◽  
Author(s):  
D. Buscombe ◽  
P. E. Grams ◽  
M. A. Kaplinski
Keyword(s):  
High Frequency ◽  
Colorado River ◽  
Bed Sediment ◽  
River Bed ◽  
Riverbed Sediment ◽  
River Bed Sediment

CONSTRUCTING A 260-KM LONG, 25-CM RESOLUTION MAP OF COLORADO RIVER BED SEDIMENT IN GLEN, MARBLE, AND GRAND CANYONS

2018 ◽  
Author(s):  
Daniel D. Buscombe ◽  
◽  
Paul E. Grams ◽  
Matthew Kaplinski ◽  
Robert Tusso
Keyword(s):  
Colorado River ◽  
Bed Sediment ◽  
River Bed ◽  
River Bed Sediment ◽  
Resolution Map

scholarly journals Annual layers in river-bed sediment of a stagnant river-mouth area of the Kitagawa Brook, Central Japan

2015 ◽  
Vol 367 ◽  
pp. 251-257
Author(s):  
Y. Kurashige ◽  
T. Nakano ◽  
E. Kasubuchi ◽  
M. Maruo ◽  
H. Domitsu
Keyword(s):  
River Mouth ◽  
Mouth Area ◽  
Contaminated Water ◽  
Deciduous Trees ◽  
Bed Sediment ◽  
Central Japan ◽  
River Mouth Area ◽  
River Bed ◽  
Sand And Gravel ◽  
River Bed Sediment

Abstract. The river mouth of Kitagawa Brook is normally stagnant because it is easily closed by sand and gravel transported by littoral currents of Biwa Lake, Japan. A new urban area exists in the basin and sewerage works were constructed in the early 1990s, so contaminated water with a bad odour had flowed into the brook before the sewerage works. To reduce the smell, the river mouth was excavated to narrow the channel in the early 1980s. Thus, river-bed sediment after this excavation only occurs at the river mouth. From the upper 24 cm of a sediment core, we found 19 strata of leaves which were supplied from deciduous trees in autumn. We also found several gravel layers which were supplied from the lake during severe storms. The combination of veins and gravel layers were reconstructed for about 20 years of sediment records with an error of two to three years.

scholarly journals Agricultural contamination impacts antibiotic resistance gene abundances in river bed sediment temporally

2018 ◽  
Vol 94 (9) ◽  
Author(s):  
Rachelle E Beattie ◽  
Michael Walsh ◽  
Mercedes Cecilia Cruz ◽  
L Rex McAliley ◽  
Laurel Dodgen ◽  
...  
Keyword(s):  
Antibiotic Resistance ◽  
Resistance Gene ◽  
Antibiotic Resistance Gene ◽  
Bed Sediment ◽  
River Bed ◽  
River Bed Sediment ◽  
Agricultural Contamination

scholarly journals Arsenic and other heavy metals in the rivers of central Nepal

1970 ◽  
Vol 31 ◽  
pp. 11-18 ◽  
Author(s):  
Steven H Emerman
Keyword(s):  
Heavy Metals ◽  
Kathmandu Valley ◽  
Bed Sediment ◽  
Multiple Sources ◽  
Central Nepal ◽  
Naturally Occurring ◽  
River Bed ◽  
Organic Complexation ◽  
Positively Charged ◽  
River Bed Sediment

The objective of this study was to measure fluvial As, Co, Cu, Fe, and Zn in order to determine whether central Nepal has a geographically-limited source of As. Seventeen rivers in central Nepal outside and eight rivers inside the heavily polluted Kathmandu valley were sampled monthly for six months. Outside the Kathmandu valley, fluvial As (11 ± 1 mg/l), Co (110 ± 30 mg/l), Cu (93 ± 4 mg/l), Fe (550 ± 80 mg/l), and Ni (50 ± 3 mg/l) were over 5, 550, 13, and 13 times the global averages for each respective element, while Zn (27 ± 4 mg/l) was very close to the global average. The only statistically significant differences between inside and outside the Kathmandu valley were pH (inside: 7.13 ± 0.06, outside: 8.13 ± 0.06), Fe (inside: 1060 ± 90 mg/l) and Cu (inside: 70 ± 10 mg/l) so that Co, Cu, Ni, and Zn levels inside the Kathmandu valley were all naturally occurring. Fluvial As was correlated both in space and time with pH. Outside the Kathmandu valley, fluvial As decreased when pH decreased, due to the increase in the number of positively-charged sorption sites on river bed sediment. Inside the polluted Kathmandu valley, fluvial As increased when pH decreased, due to the organic complexation of As and the negative correlation between organic matter and pH. Central Nepal has multiple sources of As associated with mineralisation of Co, Cu, Fe, and Ni, but not Pb-Zn.

scholarly journals CHARACTERIZATION OF THE RIVER BED SEDIMENT PROFILE AND EVALUATION OF URBANIZATION POLLUTANTS AT LUCKNOW CITY AREA.

2017 ◽  
Vol 5 (8) ◽  
pp. 370-380 ◽  
Author(s):  
Vinay Kumar ◽  
◽  
PramodKumar Singh ◽  
Pramod Kumar ◽  
Pokhraj Shahu ◽  
...  
Keyword(s):  
Bed Sediment ◽  
City Area ◽  
Sediment Profile ◽  
River Bed ◽  
River Bed Sediment

scholarly journals Testing and calibration of smart pebble for river bed sediment transport monitoring

2007 ◽  
Author(s):  
Ehad Akeila ◽  
Zoran Salcic ◽  
Nihal Kularatna ◽  
Bruce Melville ◽  
Ambuj Dwivedi
Keyword(s):  
Sediment Transport ◽  
Bed Sediment ◽  
River Bed ◽  
River Bed Sediment

In-situ measurement of river-bed sediment porosity using Structure-from-Motion image analysis

Geomorphology ◽  
2019 ◽  
Vol 338 ◽  
pp. 61-67 ◽  
Author(s):  
Mina Tabesh ◽  
Thomas Hoffmann ◽  
Stefan Vollmer ◽  
Holger Schüttrumpf ◽  
Roy M. Frings
Keyword(s):  
Image Analysis ◽  
Structure From Motion ◽  
In Situ Measurement ◽  
Bed Sediment ◽  
River Bed ◽  
River Bed Sediment
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