GEORISK WORLD • International scientific journal • Vol. XVI, No. 3/2022
Rakhmanov A.S., Rakhmonov S.S.
Rakhmanov A.S., Rakhmonov S.S., 2022. Overview of geodynamic polygons of Tajikistan for simplified retrospective analysis. GeoRisk World, Vol. XVI, No. 3, pp. 50–60, https://doi.org/10.25296/1997-8669-2022-16-3-50-60.
Systematic geodetic measurements at geodynamic polygons of Tajikistan began in 1972. The publications of Yu.D. Boulanger,
A.K. Pevnev, V.I. Kaftan, L.I. Serebryakova, M.S. Saidov, N.S. Sarabekov, F.S. Salikhov, M.S. Sharipov show that some work in this direction was carried out long before this time. The purpose of these measurements was (according to the recommendations of Yu.D. Boulanger and A.K. Pevnev) the study of modern vertical and horizontal movements of the Earth’s crust by classical geodetic methods. As noted by A.A. Izotov, astronomical, geodetic, and gravimetric works were carried out to study these movements mainly in the 1970s. The creation of geodynamic polygons was necessary to obtain data for the study of stresses arising in the Earth’s crust. The main task of organizing such polygons was, firstly, to observe geodynamic phenomena, and secondly, to study them. These phenomena lead to changes in the position of geodetic points or elements of the Earth’s gravitational field in time and space. They are classified depending on the size of the territory in which they occur, as well as on the time periods and speed of their occurrence. Global large-scale, regional, and local phenomena are distinguished. Geodynamic polygons in Tajikistan, since the mid-1940s, are used to study regional and local geodynamic phenomena at the length of the sites from 100 to 1000 km. Most of the geodynamic polygons of the country (five out of six) are concentrated in the junction zone of the Southern Tien Shan and the Tajik Depression. The sixth — Usoy — is located near Sarez Lake, in the valley of the Bartang River (Pamir), and is intended for monitoring the stability of the rockslide dam. In 1990, work on geodynamic polygons in Tajikistan was stopped and resumed only at the Nurek geodynamic polygon in 2003 by the national space, geodesy and mapping agency “Tojikkoinot”.
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ALIDZHON S. RAKHMANOV*
Moscow State University of Geodesy and Cartography; Moscow, Russia; alirakhmonov96@mail.ru
Address: Bld. 4, Gorokhovskiy Ln., 105064, Moscow, Russia
SAMANDAR S. RAKHMONOV
Moscow State University of Geodesy and Cartography; Moscow, Russia; rahmonov_samandar@inbox.ru