We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Effect of Interannual Variations of River Runoff on the Geochemistry of Estuarine Sediments.
- Authors
Shulkin, V. M.; Grigoriev, V. A.
- Abstract
Using the example of an estuary of a medium-sized river in the boreal zone (Razdolnaya River, Primorsky Krai, Russia), it is shown that even a 5–6-fold increase in the average annual river runoff is accompanied by only a 10–20% increase in the content of fine fractions in the surface 1–2 cm layer of bottom sediments located within the outer part of the estuary: Amur Bay, Sea of Japan. The chemical composition of the sediments of the inner estuary located within the riverbed is controlled mainly by variations of the grain size. In the outer estuary, pollution from Vladivostok city is an additional factor that increases the content of Hg, Cd, Pb, Cu, and Zn in the upper 30–35 cm sediment layer. The concentrations of Mo and Corg are also elevated in the sediments of the outer estuary, but this is due to accumulation in the reductive diagenesis for Mo and increased plankton production for Corg. It is possible to estimate the vertical distribution of the characteristics in the upper layer of estuarine sediments only by taking into account the rate of sedimentation, which allows us to highlight periods of anthropogenic pollution and the effect of the dynamics of the destruction of organic matter (OM).
- Subjects
VLADIVOSTOK (Russia); ESTUARINE sediments; RIVER sediments; COMPOSITION of sediments; RUNOFF; GEOCHEMISTRY; DIAGENESIS
- Publication
Oceanology (00014370), 2022, Vol 62, Issue 5, p656
- ISSN
0001-4370
- Publication type
Article
- DOI
10.1134/S0001437022050186