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
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: Azerbaijan as a result of rise of a sea level.1-Historical period, 2-Average tendency its, 3-Frequency of repetition, 4-Average tendency, 5-Level maximum, 6-Level minimum.
1-measured level, 2- tendencies of changing. In the framework seasonal changing level is shown.
CASPIAN SEA DATA BASE post.
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)
+ Digital Bathymetry Map
Errors in altimetry ~15 mm/yr
Possible uncertainty in the global lake level deduced from
terrestrial gauges to investigate
4 December 1972 post.
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)
CSL variation deduced from 10 years
(1993-2002) Of Topex / Poseidon data
and average seasonal variation
Annual Amplitude (m)