Print Email Facebook Twitter Geochemical Changes in the Caspian Salt Marshes Due to the Sea Level Fluctuations Title Geochemical Changes in the Caspian Salt Marshes Due to the Sea Level Fluctuations Author Kasimov, N.S. Gennadiev, A.N. Kasatenkova, M.S. Lychagin, M.Y. Kroonenberg, S.B. Koltermann, P. Faculty Civil Engineering and Geosciences Department Geoscience & Engineering Date 2012-07-23 Abstract The Caspian Sea is subject to alternating transgressions and regressions that exert a strong impact on the topography, sediments, vegetation, and soils in coastal zones. The last transgression of the Caspian Sea (1978-1995) caused the development of a marsh-lagoon system along the accumulative seashore of the Central Dagestan. Salt marshes are complex and dynamic systems highly vulnerable to sea level fluctuations; therefore, they may be considered as a regional model of rapid environmental changes. Hazards in coastal zones may critically change the soil geochemistry affecting agricultural potential of large areas. Assessments of risks of the natural hazards in coastal zones are extremely difficult unless the end-to-end understanding of all natural factors. The research in the Caspian region shows the impact of extreme events in the coastal zones. Detailed landscape-geochemical investigations of the Caspian salt marshes were carried out in 1995-1996 (during the final stage of the transgression period) and in 2001-2003 (during the period of the sea level stabilization). These coastal areas are influenced by different landscape-geochemical processes, such as sulfidization, gleyzation, ferrugination, humus accumulation, halogenesis, and changes of alkali-acidic conditions. The development of the processes characterizes different stages of the Caspian Sea level fluctuations. This paper presents a discussion on stages and rates of landscape-geochemical processes, formation of geochemical barriers, and trace elements distribution in soils of the salt marshes. Subject coastal zonelagoontrace elementssea-level riserisk assessment To reference this document use: http://resolver.tudelft.nl/uuid:8ef73d31-d9d2-46ee-94a7-7ec27f0db964 DOI https://doi.org/10.5539/esr.v1n2p262 Publisher Canadian Center of Science and Education ISSN 1927-0542 Source Earth Science Research, 1 (2), 2012 Part of collection Institutional Repository Document type journal article Rights (c) 2012 Canadian Center of Science and EducationThe Author(s) Files PDF 284475.pdf 1004.23 KB Close viewer /islandora/object/uuid:8ef73d31-d9d2-46ee-94a7-7ec27f0db964/datastream/OBJ/view