Izvestiya of Saratov University.
ISSN 1819-7663 (Print)
ISSN 2542-1921 (Online)


География

Современное состояние и тенденции развития золотодобывающей промышленности Таджикистана в 2018-2025 годах

Исследование освещает современное состояние и ключевые тенденции развития золотодобывающей промышленности Таджикистана в 2018–2025 годах на фоне глобальной конъюнктуры рынка золота. Показано, что высокие цены и активные закупки центробанков поддерживают инвестиционный интерес, тогда как технологическая трансформация отрасли выражается в автоматизации, цифровом управлении и углублении переработки.

Automatic identification of forest species using machine learning methods based on satellite image processing

Monitoring of the condition and species diversity of tree species plays a significant role in the forest resource management. The emergence of high-quality multispectral satellite images opens up opportunities for using information about vegetation in a certain area over a long period of time extracted from images in addition to data obtained as a result of field research.

 Prediction of Lahar flow dynamics using simulation modeling

The study presents the testing and results of simulation modeling of surface flows caused by the results of volcanic activity. An analysis of various rheological models was carried out, with a justification for the effectiveness of the Herschel-Bulkley generalized fluid model as applied to geodynamic processes (lahars, mudflows, rockfalls, etc.). The proposed hypothesis was tested and confirmed its viability based on information about a real event – the eruption of the Chaiten volcano.

Landscape studies of the Pacific Railway area in the Mulam River basin

The article examines the ecological characteristics of the landscapes along the Pacific Railway route in the Mulam River basin. This project is highly relevant for transportation and logistics infrastructure supporting mineral resource extraction, particularly for increasing exports of high-quality coal from the Elga deposit in South Yakutia to East and Southeast Asia. The railway traverses a remote, uninhabited area with insufficiently studied permafrost landscapes.

Topological approach to analyzing compactness and connectivity of settlement systems considering terrain constraints (case study of the Saratov Region)

The article examines the application of topological concepts for analysing the structure and assessing the compactness of a regional settlement system. A methodology is proposed that adapts classical topological invariants to evaluate real transport-planning networks using OpenStreetMap data, taking into account physical-geographical and legislative constraints. Instead of abstract node connectivity indices in the settlement system graph, a new operational indicator – the “exit index” – is introduced.

An analysis of geopotential fields in the Northern and Southern hemispheres under different natural climatic conditions during January

Introduction. Atmospheric pressure is a crucial characteristic of the atmosphere. Changes in atmospheric pressure lead to changes in the entire set of weather conditions. The increase in global temperature affects all atmospheric characteristics, including atmospheric pressure. This paper examines the changes in atmospheric pressure near the Earth’s surface during the stabilization period and the second wave of global warming. Theoretical analysis.

The doctrine of geosystems as the basis for the development of the concept of human co-creation with nature

The article discusses the history of the concept of human co-creation with nature, the main approaches to determining the possibilities of its implementation within the framework of the doctrine of geosystems by V. B. Sochava and the experience of landscape planning based on knowledge of the landscape organization of various regions of Siberia. The main content of modern Russian physical geography is the study of the organization of geosystems and landscape and environmental conditions for differentiating environmental management.

Трансформация сельских систем расселения таёжной зоны Иркутской области (на примере муниципальных образований Среднего Приангарья)

На примере нескольких районов Среднего Приангарья раскрываются изменения в системе сельских населённых пунктов таёжной зоны Иркутской области в период с первой после распада Советского Союза Всероссийской переписи населения 2002 г. до последней 2021 г. В системно-динамическом анализе был затронут и период становления районных систем расселения, который пришёлся на советский период и сыграл большую роль в их генезисе. Геоинформационное картографирование и анализ систем расселения осуществлялись на разных уровнях: районном, межмуниципальном, локальном, элементарном.

Granulometric features of the detrital material of modern beaches of Sevastopol

The history of studying the granulometric composition of the detrital material of the beaches of Sevastopol in scientific publications from the middle of the twentieth century to the present is considered. The granulometric characteristics (quartiles, median diameter, and sorting coefficient) of sediments from natural unofficial beaches of Sevastopol located in the bays of Sevastopolskaya, Karantinnaya, and Kazachaya have been calculated. Cumulative curves and diagrams of the granulometric composition of beach sediments have been compiled.

Comparative medical and geographical analysis of the prevalence of lung cancer in Saratov

Lung cancer in the Saratov region and Saratov is a very common pathology, ranking second in men and fourth or fifth in women in terms of incidence among other cancer localities. The article provides data on the incidence of lung cancer in Saratov for 2020–2023. Based on a comparison of city’s air basin pollution maps and types of housing development an attempt has been made to determine possible dependencies on the prevalence of the disease.

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