Joint analysis of surface‐wave and refraction events from river‐bottom sediments

2000 ◽  
Author(s):  
Julian Ivanov ◽  
Choon B. Park ◽  
Richard D. Miller ◽  
Jianghai Xia ◽  
James A. Hunter ◽  
...  
Keyword(s):  
Surface Wave ◽  
Bottom Sediments ◽  
Joint Analysis ◽  
River Bottom

scholarly journals Analysis of Spatial Variability of River Bottom Sediment Pollution with Heavy Metals and Assessment of Potential Ecological Hazard for the Warta River, Poland

Minerals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 327
Author(s):  
Joanna Jaskuła ◽  
Mariusz Sojka ◽  
Michał Fiedler ◽  
Rafał Wróżyński
Keyword(s):  
Heavy Metals ◽  
Bottom Sediment ◽  
Bottom Sediments ◽  
Risk Index ◽  
Point Sources ◽  
Sediment Pollution ◽  
Sample Collection ◽  
Effect Concentration ◽  
Ecological Hazard ◽  
River Bottom

Pollution of river bottom sediments with heavy metals (HMs) has emerged as a main environmental issue related to intensive anthropopressure on the water environment. In this context, the risk of harmful effects of the HMs presence in the bottom sediments of the Warta River, the third longest river in Poland, has been assessed. The concentrations of Cr, Ni, Cu, Zn, Cd, and Pb in the river bottom sediments collected at 24 sample collection stations along the whole river length have been measured and analyzed. Moreover, in the GIS environment, a method predicting variation of HMs concentrations along the whole river length, not at particular sites, has been proposed. Analysis of the Warta River bottom sediment pollution with heavy metals in terms of the indices: the Geoaccumulation Index (Igeo), Enrichment Factor (EF), Pollution Load Index (PLI), and Metal Pollution Index (MPI), has proved that, in 2016, the pollution was heavier than in 2017. Assessment of the potential toxic effects of HMs accumulated in bottom sediments, made on the basis of Threshold Effect Concentration (TEC), Midpoint Effect Concentration (MEC), and Probable Effect Concentration (PEC) values, and the Toxic Risk Index (TRI), has shown that the ecological hazard in 2017 was much lower. Cluster analysis revealed two main groups of sample collection stations at which bottom sediments showed similar chemical properties. Changes in classification of particular sample collection stations into the two groups analyzed over a period of two subsequent years indicated that the main impact on the concentrations of HMs could have their point sources in urbanized areas and river fluvial process.

Joint Analysis Of A Surface-Wave Method And A Micro-Gravity Survey

2004 ◽  
Author(s):  
Koichi Hayashi ◽  
Akinori Okada ◽  
Toshifumi Matsuoka ◽  
Hideki Hatakeyama
Keyword(s):  
Surface Wave ◽  
Gravity Survey ◽  
Joint Analysis ◽  
Wave Method ◽  
Surface Wave Method ◽  
Micro Gravity

Texture of the Bureya River bottom sediments in the area of the Lower Bureya HPP

2017 ◽  
Vol 72 (1) ◽  
pp. 21-30 ◽  
Author(s):  
G. V. Kharitonova ◽  
E. V. Shein ◽  
V. P. Shesterkin ◽  
A. V. Yudina ◽  
A. V. Dembovetsky ◽  
...  
Keyword(s):  
Bottom Sediments ◽  
Bureya Hpp ◽  
River Bottom

Assessment of metals content in river bottom sediments near sewage treatment plants

2020 ◽  
Vol 199 ◽  
pp. 314-322
Author(s):  
Mirosław Skorbiłowicz ◽  
Elżbieta Skorbiłowicz ◽  
Justyna Tkaczuk
Keyword(s):  
Bottom Sediments ◽  
Sewage Treatment ◽  
Sewage Treatment Plants ◽  
River Bottom

scholarly journals The Contamination of Sventoji River Bottom Sediments by Heavy Metals in Ukmerge, Lithuania

2016 ◽  
Vol 25 (1) ◽  
pp. 1-10
Author(s):  
Vaidotas Valskys ◽  
Mindaugas Motiejunas ◽  
Gytautas Ignatavicius ◽  
Stanislovas Sinkevicius
Keyword(s):  
Heavy Metals ◽  
Bottom Sediments ◽  
River Bottom
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