BISAC NAT010000 Ecology
BISAC NAT045050 Ecosystems & Habitats / Coastal Regions & Shorelines
BISAC NAT025000 Ecosystems & Habitats / Oceans & Seas
BISAC NAT045030 Ecosystems & Habitats / Polar Regions
BISAC SCI081000 Earth Sciences / Hydrology
BISAC SCI092000 Global Warming & Climate Change
BISAC SCI020000 Life Sciences / Ecology
BISAC SCI039000 Life Sciences / Marine Biology
BISAC SOC053000 Regional Studies
BISAC TEC060000 Marine & Naval
The processes in the river mouth areas play a special role in the formation and dynamics of coastal accumulative forms. The experience of Russian and foreign specialists on investigations of river mouths shows a modern intensification of sea impact on the river deltas in the world and enhance the abrasion of their delta coastlines. These processes show a trend of transformation of different mouths from the fluvial-dominated objects to the marine-dominated objects. A striking example of this process is the variability of the mouth fan, which has a complicated structure, and the mouth bars. In most cases, the structure of the mouth fan presents several successive layers. There are the following 1) abovewater and submarine sand layers; 2) layer of silty sediments of the sea slope of the mouth fan; 3) gently sloping layers of clay, component the foot of the mouth fan; 4) layer of shelf sand, not related to the formation of mouth fan. Each of these layers is characterized by a specific size and composition of sediments. Under intensification of abrasion of the mouth accumulative forms (accordance with the stage of this abrasion), the sediments significantly differed by composition, can be penetrate in the lithodynamic coastal system. A rather complex topography of the underwater slope rugged canyons is typical for the Russian coast of the Black Sea. Through these canyons, sediments, entering the river mouth area and playing an important role in the dynamics of coastal accumulative forms, can be delivered to the depths. These depths exclude of their return.
ROLE OF MOUTH PROCESSES
1. Krylenko V.V, Isupova M.V., Krylenko M.V., Dzaganiya E.V. Gidroekologiya: formirovanie geoekologicheskih osobennostey ust'evoy oblasti r. Mzymta i poberezh'ya Imeretinskoy nizmennosti pod deystviem estestvennyh i antropogennyh faktorov // Inzhenernaya ekologiya. 2011. № 5 (101). S. 3–15.
2. Mihaylov V.N. Gidrologicheskie processy v ust'yah rek. M. : GEOS, 1997. 176 s.
3. Mihaylov V.N. Gidrologiya ust'ev rek. M. : Izd-vo MGU, 1998. 175 s.
4. Samoylov I.V. Ust'ya rek. M. : Geografgiz, 1952. 526 s