ИСПОЛЬЗОВАНИЕ ИНДЕКСА NDVI ПРИ МОНИТОРИНГЕ ЗЕМЕЛЬ ФОСФОРИТОВЫХ МЕСТОРОЖДЕНИЙ

Abstract

The process of perennial monitoring of the results of the work carried out on biological reclamation of the dumps of the zhanatas phosphorite deposit as a set of measures to restore damaged biota has its own characteristics (the complexity of seed life, the absence of a fertile layer, the survival of seeds in adverse conditions, etc.).

Currently, when assessing the state of vegetation, data from space images are actively used. Remote sensing (remote sensing) data is often used, on which it is possible to obtain data on the state of surface objects, on which continuous information is collected for each specific area. 

In the course of monitoring studies using the NDVI index, we identified the degree of crop development as one of the information digital indicators of Plant Health.  With its help, we assess the state of plants used in the biological restoration of Disturbed Areas.

For the calculation, a special formula was used, according to which the density of plantings, their survival rate and further development at the selected point were determined with high accuracy. During the growing season, this indicator increases, and then gradually begins to decrease. Thus, it is possible to determine the state of plants during the growing season, dry periods, etc.

The calculation of changes in the vegetation index obtained by spectral analysis of high-resolution satellite images allowed us to track both positive and negative dynamics of plant growth and development.

The difference in the dynamics of the vegetation index indicates the disproportions of plant survival. The stable growth of artificially planted tree and shrub species on technogenically disturbed lands of phosphorite deposits once again confirms the need for recultivation of disturbed lands, soil studies, as well as monitoring the results of ongoing work for the rational use of land and their protection.