Dredging Influence on Methane Concentration in the Taganrog Bay
- Authors: Gar’kusha D.N.1, Fedorov Y.A.1, Tambieva N.S.2
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Affiliations:
- Institute for Earth Sciences
- Hydrochemical Institute
- Issue: Vol 44, No 5 (2019)
- Pages: 360-367
- Section: Article
- URL: https://journals.rcsi.science/1068-3739/article/view/231110
- DOI: https://doi.org/10.3103/S106837391905008X
- ID: 231110
Cite item
Abstract
The effects of dredging and dumping on methane concentration in water and bottom sediments of the Taganrog Bay (the Sea of Azov) are studied. It is shown that dredging operations are accompanied by the inflow of methane deposited in soil to the water column. This inflow is associated with the resuspension of soils as a result of their loosening, lifting, and loading by the dredger to the barge as well as during their discharge to underwater piles and further erosion and separation of dumping material by waves and seabed currents. In addition to the increase in methane emission to the atmosphere, this is accompanied by a negative impact on the oxygen regime due to the microbial oxidation of methane and other organic and inorganic substances which arrived during soil resuspension. However, due to a relatively small area of the seabed affected by dredging and occupied by underwater dumps as well as due to the active hydrodynamics of waters in general, their influence on methane concentration in water and bottom sediments of the Taganrog Bay is insignificant.
About the authors
D. N. Gar’kusha
Institute for Earth Sciences
Author for correspondence.
Email: gardim1@yandex.ru
Russian Federation, ul. R. Zorge 40, Rostov-on-Don, 344090
Yu. A. Fedorov
Institute for Earth Sciences
Email: gardim1@yandex.ru
Russian Federation, ul. R. Zorge 40, Rostov-on-Don, 344090
N. S. Tambieva
Hydrochemical Institute
Email: gardim1@yandex.ru
Russian Federation, pr. Stachki 198, Rostov-on-Don, 344090