INVESTIGATION OF THE ECOLOGICAL STATE OF LANDS OF THE ASTRAKHAN REGION FOR THE PURPOSE OF SUSTAINABLE DEVELOPMENT

Evdokimova Maria V.  -  Ph.D. in Biology, Senior Researcher, Senior Researcher of Department of Land Resources and Soil Assessment, Soil Science Faculty, Lomonosov Moscow State University, 1 Leninskie Gory, Moscow, 119991, Russia, soil.resources@mail.ru

Yakovlev Alexander S.  -  Professor, Doctor of Biology, Head of the Department of Land Resources and Soil Assessment, Soil Science Faculty, Lomonosov Moscow State University, 1 Leninskie Gory, Moscow, 119991, Russia, yakovlev_a_s@mail.ru

Zhao Liang  -  Master's Student, Soil Science Faculty, Lomonosov Moscow State University, 1 Leninskie Gory, Moscow, 119991, Russia, 793386499@qq.com

A spatially distributed assessment of the ecological state of the lands of the Astrakhan region is given. The latter is based on a detailed satellite survey of entire territory as a reference for further monitoring and control of land degradation. Maps of the distribution of land productivity values, as well as a generalizing indicator of land degradation characterizing the ecological state of the lands of the Astrakhan region for the reference period from 2001 to 2020 were obtained. It was found that at the end of 2020 26% of the region's territory belongs to the category of potentially degraded by the SDG indicator 15.3.1. 13% of lands belongs to the category of improved during the same period, and 73% belongs to their sum with the category of stable lands. The trends of decreasing the amount of photosynthetically active biomass both on the entire territory of the region and on the reference sites of natural monuments have been revealed.

Key words: ecological state of lands, mathematical modeling, analysis of Earth remote sensing data, vegetation index, sustainable development, land degradation control.