Supply Area Research Articles

A Comparative study of the mineral composition of Macrotermes and Cubitermes termite mounds in Lualaba, D.R. Congo: Contribution to strategic prospecting for Cu and Co deposits

This work focuses on the comparative analysis of the influence of two termites of the Macrotermes (fungus-growing) and Cubitermes (soil-feeding termites) genera on the dynamics of soil lithogeochemical facies. The aim was to establish a general systematic recognition of the lithology of a large area, including its potential for Cu and Co mineralization. Eighty-eight samples of the mound material were collected from termite mounds of these two species along a 50 km transect in Lualaba Province, Democratic Republic of Congo (DRC) in order to carry out major and trace element analyses. Interpretation of the data was carried out through exploratory analysis, using the Ascending Hierarchical Classification (AHC) method and Principal Component Analysis (PCA), followed by statistical modeling using linear regression. After clustering the termite mounds into classes by AHC, an initial PCA was used to map the lithology of these classes using major elements. The results highlight the dependance of the lithological composition of the mounds on the behavior specific to each of the two termite species. Linear regression modeling allowed a delineation of the area of supply of building materials for each species, indicating the possible incorporation of Cu and Co mineralizations likely to be present in the environment of the termite mounds. The use of termite mounds as a tool in mining exploration is discussed.

The Implementation of PACS (Picture Archiving And Communication System) in Radiology Department of Margono Soekarjo Hospital

Background: This study aims to determine the evaluation and influencing factors in the implementation of the Picture Archiving Communication System (PACS) at the Radiology Department of Margono Soekarjo Hospital, PurwokertoMethods: The type of the research is qualitative research with a purposive sampling approach which produces descriptive data in the form of pictures and written or spoken words from informants and observed behavior. Data obtained by researchers is by means of observation, in-depth interviews, and documentation. The data is analyzed using interactive model, for further drawn conclusions.Results: The results showed that PACS implemented in the radiology department of Margono Soekarjo Hospital, Purwokerto consisted of several components, namely Image Acquisition / Modality, PACS Core Application, Viewing / Reading Station. Image Acquisition / Modality. Factors that influence the implementation of the Picture Archiving Communication System (PACS) at the Radiology Department of Margono Soekarjo Hospital, Purwokerto, were manpower resources, Stability of power supply and Local Area Network, but in the implementation there was no SOP that could be used as operational guidelines for users of inpatient department, polyclinics, and emergency departments.Conclusions: Suggestions for accessing PACS can be done not only can it be accessed from a personal computer but it can be accessed from a laptop.

The spatiotemporal dynamics of ecosystem services bundles and the social-economic-ecological drivers in the Yellow River Delta region

• The temporal correlations of ΔESs between two consecutive years showed the similar patterns. • The spatial correlations of ESs in different years changed considerably. • The types of ESs bundles increased, with new bundles found in 2004 and 2015 respectively. • ESs hotspots based on natural ecosystems decreased, while those based on artificial ecosystems increased. • Increases in artificial wetlands, urban lands, and crop yields were the key drivers of the ES bundles change. Understanding the relationships between ecosystem services (ESs) is important for ecosystem management and sustainable development. However, most studies used synergies and trade-offs to infer ESs relationships, while ESs bundles was infrequently involved. Research on the spatiotemporal dynamics and potential drivers of changes of ESs bundles is still lacking. In this study, we quantified and mapped 10 ESs in 1986, 1992, 1998, 2004, 2010, and 2015 in the Yellow River Delta (YRD) region. The hotspots analysis was first used to discern areas of high and low ESs supplies, and the Spearman correlation analysis was then applied to examining the spatiotemporal trade-offs and synergies of ESs. The K-means clustering algorithm was used to identify the ESs bundles, while the Random Forest analysis was further used to identify the drivers of changes of ESs hotspots and bundles between 1986 and 2015. Results showed that: (1) the ESs hotspots areas with natural ecosystems were reduced, while the ESs hotspots areas with artificial ecosystems increased; (2) the temporal correlations between two consecutive years showed the similar patterns, while the spatial correlations changed greatly; (3) the types of ESs bundles increased, and the bundles provided by natural ecosystem were replaced by the bundles provided by artificial ecosystems; (4) the increase of artificial wetlands, built-up lands, and agricultural yields, as well as the decrease of marsh lands were the determinant drivers of changes in the ES bundles. Our findings are expected to enhance the current understanding of ESs relationships and contribute to the targeted ESs management in coastal areas.

Application Value of CT Perfusion Imaging in Patients with Posterior Circulation Hyperacute Cerebral Infarction

Objectives: This study aims to evaluate the application value of computed tomography perfusion (CTP) imaging in patients with posterior circulation cerebral infarction in the hyperacute phase. Methods: The changes in CTP parameters, such as time to peak (TTP), mean transfer time (MTT), cerebral blood flow (CBF) and the cerebral blood volume (CBV) of ischemic region, as well as the ischemic penumbra, infarction core at the affected side and normal brain tissue at the uninjured side, of 168 patients with suspected posterior circulation acute ischemic stroke were analyzed. The sensitivity, specificity, accuracy, positive predictive value and negative predictive value of each parameter map of CTP in displaying the cerebral infarction size in each part of the posterior circulation were evaluated. Results: The CTP results revealed that CBF and CBV in the infarction area significantly decreased, and MTT and TTP in the blood supply area of cerebellum, thalamus and posterior cerebral artery (PCA) were significantly delayed. These were statistically different from those in the surrounding penumbra and normal brain tissue (P < 0.05). Furthermore, the CBF of the penumbra in each part slightly decreased, and the delay of MTT and TTP was statistically different from that in normal brains (P < 0.05). The CBV of the penumbra in the pons, midbrain and thalamus decreased, which was statistically different from that in normal brain tissue and simple cerebral ischemia tissue (P < 0.05). The changes in CBF and MTT of the simple cerebral ischemia in each part, and TTP, except for the cerebellum, were statistically different from those of cerebral infarction and normal brain tissue (P < 0.05). The total sensitivity, specificity and accuracy for the posterior circulation cerebral infarction was 77.2%, 98.6% and 94.9%, respectively, according to the CTP evaluation. Conclusion: The CTP parameter map can reflect the difference between an ischemic penumbra and an infraction core in the posterior circulation. It has high sensitivity, specificity and accuracy in the CTP evaluation of posterior circulation cerebral infarctions.

Maternal exposure to arsenic in drinking water and risk of congenital heart disease in the offspring.

Prenatal exposure to arsenic is suspected to impair fetal health, including congenital malformations. Few studies investigated an association between maternal exposure to arsenic and congenital heart disease. To examine the association between maternal exposure to arsenic through drinking water and congenital heart disease among offspring. This nationwide cohort study included all liveborn children in Denmark, 1997-2014. Maternal addresses at fetal age 4weeks were linked to drinking water supply areas. Exposure was arsenic concentration in drinking water in first trimester in four categories (<0.5μg/L, 0.5-0.9μg/L, 1.0-4.9μg/L, ≥5.0μg/L). Outcomes were defined as congenital heart disease diagnosed within the first year of life, with sub-categorization of severe, septal defects and valvular heart defect. Associations between arsenic levels and congenital heart disease were analysed using logistic regression, presented as odds ratios (OR) with 95% confidence interval (CI), and adjusted for year of birth, mother's educational level and ethnicity. A total of 1,042,413 liveborn children were included of whom 1.0% had a congenital heart disease. The OR of congenital heart disease was higher among children exposed to all levels of arsenic above 0.5μg/L; the OR was 1.13 (95% CI: 1.08-1.19) for exposure of 0.5-0.9μg/L, 1.33 (95% CI: 1.27-1.39) for 1.0-4.9μg/L and 1.42 (95% CI: 1.24-1.63) for ≥5.0μg/L. Similar associations were observed for congenital septal defects. The OR was also higher for severe congenital heart disease but at the same level among all exposure levels ≥0.5μg/L. The OR of congenital valvular heart defects was only higher among children with maternal exposure to arsenic in drinking water ≥5.0μg/L. The associations were similar for boys and girls. The findings indicate that maternal exposure to arsenic in drinking water even at low concentrations (i.e., 0.5-0.9μg/L) increased the risk of congenital heart disease in the offspring.

Discharge plasma formation in square capillary with gas supply channels

A comprehensive model of processes in a discharge capillary is required in order to obtain nominal parameters of a preformed plasma channel suitable for the laser wake-field acceleration. We present three-dimensional magnetohydrodynamics simulations of a hydrogen gas filling process and discharge plasma formation in a short square shaped capillary with gas supply channels. Time evolution of the gas pressure and the plasma density in the capillary channel for a chosen discharge current profile is analyzed. Performed simulations provide distributions of the electric current, the magnetic field, and the electron density along the whole channel, taking into account gas supply areas as well as areas outside of the capillary. Obtained results show that the presence of gas supplies leads to the inhomogeneous plasma density distribution along the capillary channel which has to be taken into account for generating an optimal laser-driven electron beam.

Medicine Storage and Dispensing Facilities in Public Healthcare Pharmacies of Puducherry, India.

BackgroundLarge amounts of medicines are wasted during procurement, storage, distribution, and utilization. Proper procurement, storage, dispensing, and documentation of medicines are important aspects of pharmacy management. The World Health Organization (WHO) and the Indian Pharmaceutical Association (IPA) have developed guidelines for the storage and dispensing of medicines by pharmacists. This study was conducted to assess the storage and dispensing facilities of medicines in public healthcare pharmacies of Puducherry province in south India.MethodologyA one-time survey was conducted in 10 public healthcare pharmacies by filling the checklist which was prepared based on the WHO and IPA guidelines.ResultsFacilities such as adequate surface area, storage area, reception area, and availability of water supply in dispensing area were available in 90% of surveyed pharmacies. The most common system used for the arrangement of medicines was alphabetical order (70%). In 80% of pharmacies, a sufficient number of shelves was available for storage of medicine, and in 90% of pharmacies, shelves were properly labeled. None of the pharmacies had separate storage facilities for expired medicines and narcotic drugs.ConclusionsIn Puducherry, pharmacy services are provided by qualified and experienced pharmacists. Although most of the surveyed pharmacies had all the required infrastructure and equipment facilities, few pharmacies need to improve their facilities to promote good drug-dispensing practices.

Spatiotemporal Analysis of Soil Moisture Variation in the Jiangsu Water Supply Area of the South-to-North Water Diversion Using ESA CCI Data

The South-to-North Water Transfer Jiangsu Water Supply Area (JWSA) is a mega inter-basin water transfer area (water source) that provides water resources from JiangHuai, combines drainage and flooding management, and regulates nearby rivers and lakes. Analyzing the spatiotemporal soil moisture dynamics in the area will be informative regarding agricultural drought along with flood disaster assessment and will provide early warning studies. Therefore, we evaluated the quality of European Space Agency Climate Change Initiative Soil Moisture (ESA CCI_SM) data in the South-North Water Transfer JWSA. Furthermore, we utilized ensemble empirical modal decomposition, Mann-Kendall tests, and regression analysis to study the spatiotemporal variation in soil moisture for the past 29 years. The CCI _SM data displayed a high correlation with local soil measurements at nine sites. We next analyzed the CCI_SM data from three pumping stations (the Gaogang, Hongze, and Liushan stations) in the South-North Water Transfer JWSA. These stations had similar periodic characteristics of soil moisture, with significant periodic fluctuations around 3.1 d. The overall soil moisture at the three typical pumping stations demonstrated an increasing trend. We further investigated whether abrupt soil moisture changes existed at each station or not. The spatial distribution of soil moisture in the South-North Water Transfer JWSA was characterized as “dry north and wet south”, with higher soil moisture in winter, followed by autumn, and low soil moisture in spring and summer. Although the linear trend of soil moisture in the South-North Water Transfer JWSA varied in significance, the overall soil moisture in the JWSA has increased over the past 29 years. The areas with significantly enhanced soil moisture are mostly distributed in the Yangzhou and Huai’an areas in the southeastern part of the study area. The areas with significantly decreased soil moisture are small in size and mostly located in northern Xuzhou.

Influence of collaboration in the supply chain on operational performance in the textile and metal-mechanical industry in Vale do Itajaí (SC)

Abstract Collaboration in the supply chain is involved in studies that suggest the relationship between companies in search of mutual benefits and maintenance of a strategic partner to improve the operational performance of organizations. The collaborative practices defined in the literature refer to a collaborative culture, joint planning, joint problem solving, and sharing of resources and information. From this perspective, this article aims to evaluate the influence of collaboration in the supply chain on the operational performance of the medium and large industries of the Textile and Metal-mechanic segment of the Vale do Itajaí (SC). Through questionnaires applied in the supply area in a universe of 109 industries, it was possible to collect data from 66 companies. It was found that joint planning and collaborative culture are collaborative practices that influence operational performance. Regarding the performance factors, flexibility was shown as an absent attribute in the industries: after the analysis of the moderating effect by segment, it was concluded that flexibility was not present only in the Metal-mechanic sector. It was also tried to diagnose the influence of the collaboration practices by industrial segment: in the Textile sector the influence of the joint resolution of problems was revealed and, in the Metal-mechanic sector the joint planning as a variable of impact on the operational performance was highlighted.

FOOD COST ANALYSIS DURING LOCKDOWN USING ACTIVITY BASED COSTING AND FOOD FREQUENCY QUESTIONARE METHODS

The emergence of the debate about the level of effectiveness and efficiency of vaccination versus lockdown policies currently attracts the attention of the authors. The author believes that the lockdown policy will be effective to be implemented in the future. This study was aimed to determine the type and amount of food needs and obtain a mathematical model to predict the cost of food security if the lockdown policy scenario is implemented. Urban areas are used as subjects in this study due to the vulnerability of food availability in cities when a pandemic condition occurs where food supply from the supply area (rural) is disrupted. The novelty of this research is the use of two exploratory methods, that is activity base costing and a food frequency questionnaire which aims to obtain information about the number of basic food needs for 100 residents of batununggal village, bandung city, as the research sample. The results of the study found that the cost of food per person is rp. 219,848 per pax for 14 days. With the following mathematical equation food cost during 14 days lockdown = idr 219,848 x, x = person. The cost of lockdown in general is much cheaper than the cost of vaccinations currently being carried out by the government.

АНТРОПОТЕХНОГЕННІ ЧИННИКИ ВПЛИВУ НА БЕЗПЕКУ ВОДОКОРИСТУВАННЯ В КОНТЕКСТІ УРБАНІСТИЧНИХ ПРОЦЕСІВ: ПРИЧИНИ, НАСЛІДКИ ТА МЕТОДИ ПРОТИДІЇ

Urbanization processes lead to an increase in water use and its contamination. The strengthened anthropogenic impact has caused an unfavorable situation in the hydrosphere in almost all regions of Ukraine. Amidst constant anthropogenic load and intensive change of the living environment due to urbanization processes, measures reducing the level of pollution of wastewater, groundwater, and atmospheric air come to the fore. The article systemizes the factors of anthropogenic impact on water use safety, namely: wastewater of atmospheric and industrial origin, groundwater pollution, acid precipitation, and an increase in technogenic sediments that are formed during the operation of industrial and economic facilities, etc. It is also noted that the major problems of urbanized areas are high air pollution and deterioration of water supply and sanitation infrastructure. They result in a deterioration of the quality of water resources, a growth of atmospheric air pollution, the number of anthropo-genic sediments, and diffuse pollution of the environment. The directions of minimizing the negative impact of anthropogenic sediments, air pollution, surface contaminated runoff from urban areas on the quality of water in water bodies and their ecological state are substantiated. The urbanization of territories causes an increase in the volume of wastewater from all water users, both individual citizens and enterprises of industry, housing and agriculture. Despite the different technologies of wastewater treatment, a great deal enters the environment without treatment due to the growing number and overloading of treatment plants. The directions of minimizing the negative impact of surface contaminated runoff from urban areas on the quality of water in water bodies and their ecological state are systematized. Measures of rational water use are proposed, in particular: reduction of water consumption in urbanized areas as a result of the use of a system of economic tools, resource-saving technologies; strengthening control over the discharge of industrial waste; use of low-waste technologies and water recycling; establishment of standards for wastewater discharge; creation of water protection zones in areas of groundwater supply and intake, etc.

Разработка прогнозной модели неравномерного входящего потока транспортно-логистического центра

The article discusses the problems of uneven arrival of vehicles at the transport and logistics center (TLC) and identifies operational problems that arise at the time of cargo transshipment between different modes of transport. The effects of the irrational use of loading and unloading machines and ways to reduce the identified negative impact are determined. The main approaches to modeling the moments of arrival of vehicles in the preparation of technological documents for the operation of the logistics complex (contact schedule of the complex, the schedule of trains on the adjacent section) and the daily schedule of the work of the junction station are highlighted. The uniform supply of vehicles, characteristic of dispatching the supply of modes of transport, is relevant for modeling the operation of the supply of groups of wagons to the terminal. In case of uneven arrival of vehicles, areas of concentrated and sparse supply of vehicles are allocated. For these periods, the reasons for downtime and irrational increase in operating costs for processing one ton or intermodal unit of cargo are determined. In order to determine the nature of intra-day irregularity of the supply of vehicles, a method has been developed based on identifying the functional dependence of the arrival of vehicles during the day and constructing an appropriate histogram of the distribution of the arrival of vehicles corresponding to the selected time intervals during the day, which allows us to get a general idea of the nature of the arrival of modes of transport of various parameters. Modeling the operation of the terminal and logistics complex in the market economy with unpredictable moments of arrival of vehicles and uneven arrival of transport, special attention should be paid to the mode of operation of loading and unloading machines and crews at different times of the day when developing the technology. The allocation of periods of condensed and sparse supply of transport enables us to adjust the operation of the terminal to optimize operating costs and reduce the total cost of cargo processing, and the attraction of additional processing capacities during peak periods will minimize downtime of vehicles waiting for processing.

РЕСУРСОСБЕРЕЖЕНИЕ ПРИ РАБОТЕ БИВАЛЕНТНОЙ СИСТЕМЫ ОТОПЛЕНИЯ

One of the promising areas of energy supply of individual buildings, as well as within the framework of solving issues of energy supply and reducing the cost of hydrocarbon fuel is the use of heat pumps based on low-potential heat sources. In the presented work, the possibility of using air-water heat pumps in monovalent and bivalent modes of operation with various auxiliary sources is considered. Resource saving analysis is carried out on the following combined heat supply systems: heat pump-gas boiler and heat pump-electric boiler. The expediency of the resource-saving bivalent mode of operation of the combined heat supply system and its reliability are revealed.

Rural labor associated with lymphohematopoietic cancers in a public reference hospital: a case-control study, Ceará, Brazil, 2019-2021

This is a paired case-control study that sought to verify the association between professions and lymphohematopoietic cancers in a public reference hospital in the State of Ceará, Brazil, during 2019-2021. Case group consisted of hematological patients with multiple myeloma, leukemias or non-Hodgkin lymphomas, monitored by the social service of a bone marrow transplant hospital unit (n = 114), whereas comparable individuals from a different hospital unit made up the control group (n = 114), forming 1:1 pairs. Diagnosis was performed by a medical team and the variables were measured by accessing hospital records. Group comparison was conducted using bivariate conditional logistic regression and adjusted by region of residence. Results show that multiple myeloma (43.9%), leukemias (43%) and non-Hodgkin lymphomas (13.2%) were the cancer with the highest prevalence in the case group. Proportions of jobs, area of residence, water supply and Regional Superintendence of Health showed statistically significant difference between the case and control groups. Rural workers were more likely to present the cancers studied (ORraw = 5.00, 95%CI: 1.91; 13.06 and ORadjusted = 3.38, 95%CI: 1.20; 9.54), whereas trade workers had lower odds (ORraw = 0.26, 95%CI: 0.10; 0.70 and ORadjusted = 0.30, 95%CI: 0.10; 0.88). The findings allow us to reflect on the process of illness among rural workers and illustrate the potential of health services to contribute to investigations on occupational exposures.

Двухканальный безмостовой корректор коэффициента мощности

This paper discusses the analysis and design details of a bridgeless power factor corrector. The circuit topology of the proposed power converter is based on the combination of two DC/DC converters forming a two-channel structure of the power processing path. To meet the safety requirements, the converter circuit is equipped with a common ground link between the AC input voltage source and the DC output. The two-channel bridgeless power factor corrector operates under a power factor close to one and is robust to a short circuit fault. The resonance mode of the converter circuit prevents unpredictable overvoltage across the converter semiconductors. The device was modelled and simulated using MATLAB/Simulink software environment under varying load conditions. The results of numerical investigations have confirmed predicted device performance parameters and operational characteristics. The paper content will attract the attention of researchers and engineers working in the areas of electrical power engineering and power supplies.

THE FUNCTIONAL SIGNIFICANCE OF SPECIAL MEANS OF HEALTHCARE IN THE SYSTEM OF PHYSICAL EDUCATION

In the process of maintaining and strengthening a person's health, the personalization of physical culture and health activities is brought to the fore, conditioned by the manifestations of a person's energy saving factors. The aim of research is to reveal the functional significance of special healthcare means in the modern system of physical education of the youth. The issues of research are to discover the current views of the research problem through theoretical analysis, which are related to the expansion of adaptation of young students engaged in healthy physical education, maintenance and enhancement of health, physical and functional training, to justify the importance of accounting for younger generation energy sources in the process of expanding and adaptability, to find out the level of students’ physical ability in different areas of energy supply through laboratory research.

Small focal cerebral ischemic changes caused by hypertension and tandem atherostenosis of the cerebral arteries

Postmortem studies are of great importance in evaluating the effectiveness of clinical, diagnostic, therapeutic, and preventive measures aimed at combating a social disease, such as dyscirculatory encephalopathy, the leading causes of which are hypertension and atherosclerosis. The complexity of these studies is largely determined by a variety of brain changes with the frequent concurrence of hypertension and severe cerebral atherosclerosis and, at the same time, the similarity of some changes, for example, the localization and size of hypertensive and atherosclerotic lacunar infarcts. The paper describes a case of dyscirculatory encephalopathy with multiple small focal cerebral ischemic changes caused by both hypertension and athero-stenosis of several arteries in both the brain carotid systems and the vertebrobasilar system, namely tandem stenoses. It has been established that small infarcts in tandem stenosis can result from adaptive processes in the intracranial arteries. These infarcts have some features of localization, such as the areas of adjacent blood supply to the cerebral hemispheres and cerebellum, as well as the deep regions of the brainstem. It is shown that arterial pathological changes in the ischemic zones permit one to make a differential diagnosis of hypertensive lacunar infarcts and the same infarcts arising in tandem stenoses. In addition, among the typological signs of hypertensive lacunar infarcts, there are enlarged perivascular spaces in the peri-infarct region and ischemic destruction of myelin in the periventricular regions of the brain.

Nasal Vaccines for COVID-19

Coronavirus disease (COVID-19), a highly contagious viral respiratory illness, has resulted in widespread human losses, as well as posing more newer difficulties to the global health infrastructure. Vaccination has been a powerful public health tool for preventing deadly diseases, and it is still the most effective weapon when dealing with pandemics. Intranasal vaccines form an important part of the next-generation vaccines being developed to bolster our arsenal against infectious diseases. Nasal delivery of vaccines induces both systemic and local mucosal immune responses to help scale up the war against the inhaled pathogens. Owing to its simplicity, ease, convenience, safety, and higher effectivity, intranasal vaccines are turning out to be a promising alternative to the parenteral and other mucosal routes of administration. Intranasal vaccines are considered more efficacious than conventional parenteral injectable vaccines for influenza virus. The vaccination rate can be increased as the intranasal vaccine is directly delivered into nasal cavity and involves less cumbersome and painless procedure than intravenous administration. Nasal mucosa is an easily accessible organ with rich vascular supply and large surface area available for absorption aiding in quick absorption of vaccine. Furthermore, the intranasal vaccines are more affordable than the conventional vaccines.

Підвищення ефективності роботи машинобудівного підприємства на основі логістично-спрямованого підходу

On the basis of a typical machine-building enterprise the problem of increasing the efficiency of its operation using a logistics-oriented approach is considered. The basic processes of production activity within the limits of the concrete machine-building enterprise on which production, production-sales or supplier-production-sales systems are allocated are defined. The issues of creating a logistics system at the enterprise and its logistics management in the logistics environment, taking into account the factors of macro-, meso- and micro-environment. Based on the logistics-oriented approach, the structure of the enterprise is built, its logistics mission at each stage of production and economic activity is determined. Within the cybernetic approach, the link of the logistics system is presented as a certain element of the transformation of material and information flows. The vector equation of this transformation taking into account the set of characteristic vectors is offered. It is shown that the set of logistics actions is implemented in the supply, production or sales areas. Criteria for effective logistics management are defined. Their implementation is given on the example of the minimum total logistics costs and the maximum profit from all logistics activities. The formalization of the task of effective logistics management at a machine-building enterprise to minimize overall logistics costs is considered.

Динамика площади зеркала горных озер бассейна реки Гунт (Памир, Таджикистан

The article discusses mountain lakes posing threat to downstream settlements and infrastructure based on the example of Lakes Rivakkul and Nimatskul in the Gunt River Basin. In recent decades, the number and area of lakes have been growing at an accelerated rate due to the shrinking of glaciers in the target basin home to over 600 such reservoirs. The elaboration of recommendations for the installation of early warning equipment to inform population about high-mountain lake outbursts is critical for the sustainable development of the Central Asian Region. The study aimed to investigate the surface area dynamics of 2 (two) mountain lakes in the Gunt River Basin during 2000-2019. Using remote sensing data, summary data were collected on their water supply, location and surface area. The paper presents the findings obtained based on Landsat 7-8 imagery (August and September 2000-2019). The harvested data showed that 2006 witnessed the maximum increase in the area of Lake Nimatskul, whereas the same was observed for Lake Rivakkul in 2010. During the study period (from 2000 to 2019), Lake Nimatskul demonstrated a gradual surface area decrease from 0.513 to 0.462 km2, while Lake Rivakkul remained more stable. It was established that the surface area dynamics of mountain lakes are closely related to meteorological parameters, and that surface and underground runoff stabilized lake surface area and water level.