Caspian Sea water level fluctuation: comparison between ground Measurement and altimetry M Bolgov R Mammedov J-F Crétaux M. Bergé-Nguyen A. Kouraev Destruction of a coastal zone in northern coast of Azerbaijan as a result of rise of a sea level. Caspian Sea level fluctuation problem
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Caspian Sea water level fluctuation: comparison between ground
Measurement and altimetry
Destruction of a coastal zone in northern coast of Azerbaijan as a result of rise of a sea level.
Peculiarities of the variability of the Caspian Sea level
The variability of the Caspian Sea level can be classified on cycles:
Variability of the Caspian Sea level for historical period: 1-Historical period, 2-Average tendency its, 3-Frequency of repetition, 4-Average tendency, 5-Level maximum, 6-Level minimum.
Annual levels of the Caspian Sea measured in the Baku post.
1-measured level, 2- tendencies of changing. In the framework seasonal changing level is shown.
Reasons for changes in sea level
CASPIAN SEA DATA BASE
Water mass balance estimation
The balance of water in the Caspian Sea is determined by the following contributory factors:
1) surface river flow into the sea;
2) precipitation over the surface of the sea;
3) underground flow into the sea;
4) evaporation from the surface of the sea;
5) outflow into the gulf of Kara-Bogaz-Gol.
The first three factors constitute additions to and the last two, subtractions from, the water stock of the Caspian
DV/dt = (Runoffrivers - RunoffKBG) + (Gi-Go) +(P-E)
Altimetry on the Caspian sea and Kara Bogaz Gol Gulf
Study of CSL from altimetry
+ Digital Bathymetry Map
Water mass balance of Caspian sea
Global agreement with remaining local discrepancies (70 mm
Errors in altimetry ~15 mm/yr
Possible uncertainty in the global lake level deduced from
terrestrial gauges to investigate
Kara Bogaz Gol water balance
4 December 1972
29 September 1987
Change of the area of gulf Gara-Bogaz-Gol
Mamedov (1996) presents the following relationship (attributed to Sheremetievskoi):
where, QKBG = annual inflow to the KBG (km3), H = average annual sea level at Baku (cm), QC = annual inflow to the Caspian Sea (km3).
DV/dt = Runoff (Caspi->KBG) – (E-P)*Surface(t)
Geographycal distribution of annual
CSL variation deduced from 10 years
(1993-2002) Of Topex / Poseidon data
and average seasonal variation
Annual Amplitude (m)