Knowledge space

Исследование лавинной деятельности в горных регионах является важным аспектом для обеспечения безопасности населения и защиты инфраструктуры. Особое внимание уделяется изучению лавин в труднодоступных и малоизученных горных районах, одним из которых является Гиссаро-Алай. Удаленность, труднодоступность и повышенная облачность в период наибольшей лавинной активности делают полевые наблюдения и использование оптических спутниковых снимков для исследования лавинной деятельности в Гиссаро-Алае крайне затруднительными. В таких условиях оптимальным решением становится применение радиолокационных технологий, позволяющих получать данные независимо от погодных условий и условий освещенности. В статье описывается методика обработки радиолокационных снимков спутника Sentinel-1, а также результаты дешифрования лавинных отложений, которые были получены для Зеравшанского, Гиссарского, Туркестанского и Алайского хребтов в сезоне 2021/2022 гг. Проведена верификация метода при помощи мультиспектральных данных со спутников группировки Sentinel-2. Для каждого из хребтов Гиссаро-Алая приведены особенности лавинной деятельности – распределение отдельных мест залегания лавинных отложений по абсолютной высоте, крутизне и экспозиции склонов.

Why water monitoring and assessment are important?

Water quality assessment is one of the crucial scientific and practical analyses to identify the possibility of water consumption for different human needs and nature/ecosystem conservation for future generations. Water quality can be measured and monitored in rivers, springs, creeks, swamps, estuaries, wetlands and lakes what is called aquatic systems. Quality parameters, such as biological, chemical and physical indicators identify the combination of values that influence the composition of water. Monitoring and comparison of different water habitats (macro invertebrates) in biological monitoring provides an information of water quality and allows to make a quick assessment.

The water, energy, and food (WEF) nexus is being promoted as a conceptual idea for achieving sustainable development, that describes the interconnections and interdependencies between those three sectors. The main objective of this article is to operationalize the WEF nexus concept in lift-irrigated areas of Uzbekistan through involving local stakeholders, to investigate the WEF nexus within the lift-irrigated agriculture of the Kashkadarya region, an area heavily reliant on the Karshi Canal system. The study is grounded in the urgent need for sustainable development, with a focus on enhancing intersectoral cooperation between water, energy, and food sectors. A case study methodology was employed, incorporating semi-structured interviews with experts, alongside local farmers and scientists. Data were analysed using the qualitative analysis software, Atlas.ti. The results indicate significant challenges to intersectoral cooperation in the WEF nexus, including lack of trust, communication barriers, differing priorities, and insufficient political will. However, the findings also highlight the potential benefits of improved cooperation, such as enhanced resource efficiency, reduced operational costs, and mitigated risks from environmental stressors like drought. The study concludes that, according to stakeholders’ opinions, while the WEF nexus presents critical opportunities for advancing sustainable development in Uzbekistan, substantial barriers must be addressed to realize these benefits. Recommendations include promoting sustainable agriculture to reduce water dependency, improving energy security by diversifying energy sources, and raising awareness of the WEF nexus’s importance. Furthermore, fostering stronger stakeholder cooperation is crucial for achieving Uzbekistan’s Sustainable Development Goals (SDGs) by 2030.

Изучены особенности пространственной и временной изменчивости повторяемости атмосферных блокингов над территорией Казахстана в зимние месяцы, а также вариаций ее температурного режима для зимних месяцев. При обнаружении атмосферных блокингов в качестве фактического материала использована информация об изменениях над территорией Казахстана среднечасовых значений атмосферного давления, которые приведены к уровню моря, а также аналогичных значений геопотенциала, соответствующих изобарическим поверхностям 850, 500 и 300 гПа. При оценке влияния атмосферных блокингов на термический режим регионов Казахстана как фактический материал использованы результаты его мониторинга, проводившегося на расположенных в них метеостанциях Казгидромета, а также информация из архивов и электронных ресурсов. Предложена методика обнаружения атмосферных блокингов, обобщающая процедуры, которые традиционно используются для решения рассматриваемой задачи, что позволило снизить вероятности возникающих при этом ошибок. Для различных секторов территории Казахстана для всех зимних месяцев оценены средние значения повторяемости атмосферных блокингов за 1960–2020 гг., продолжительность которых не менее 5–10 суток, тенденции ее межгодовых изменений на отрезках времени, соответствующих различным частям современного климатического периода. Определены климатические нормы повторяемости таких блокингов для современного климатического периода и их изменения по отношению к базовому климатическому периоду (1961–1990 гг.). Также изучено влияние рассматриваемых атмосферных блокингов на термический режим различных регионов Казахстана, который характерен для зимних месяцев. Выявлены регионы Казахстана, где в периоды рассматриваемых атмосферных блокингов возникали наибольшие изменения их термического режима.

Recently, Paulownia spec. has been introduced to Central Asia in a number of small plantations. Paulownia yields timber of high quality for applications such as furniture, house construction, boat construction, and surf boards, or skis. Thus, Paulownia might offer a much-needed raw material for this region and beyond. However, Central Asia is largely occupied by drylands so that Paulownia needs irrigation. Against the background of frequent water stress across the region, this study aimed at assessing the water consumption and water productivity of that tree, using a 6-year-old plantation as study site. Trees were planted in May 2017 and cut back to their stumps in 2018. Daily crop evapotranspiration was calculated after the Penman-Monteith approach, whereby the crop coefficients were inherited from actual evapotranspiration values which stemmed from the remote sensing approach S-SEBI. Water consumption per tree was 1741 l, 4461 l, 4500 l, and 4407 l over the growing seasons 2020, 2021, 2022, and 2023, respectively. The water productivity for the stem wood over the whole time-span from planting in 2017 until 2023 was 1.59 g l-1 and 5.65 ml l-1. Given the high quality of its timber and its range of high-value applications, it can be concluded that the water consumed by Paulownia enables higher value timber and timber products than other trees that grow in comparable areas of Central Asia.

Soil salinity in Central Asia negatively impacts soil structure, leading to degradation and reduced water infiltration. This not only hampers agricultural productivity but also makes the land less suitable for construction due to its high susceptibility to deformation. Environmentally friendly materials like biochar, a carbon-rich substance, show promise in reducing the deformation of saline soils. However, the mechanisms behind its effectiveness are not yet fully understood. This study aims to analyse saline clays’ dispersion and sedimentation behaviour under varying pore water salinity levels (0 % to 10%). A biochar content of 5 % was selected as it is found to be optimum for plant growth and erosion resistance. It was found from the study that the biochar increases the aggregation of soil particles and enhances flocculation, improving soil dispersion characteristics. Biochar facilitates soil particle aggregation by increasing the cation exchange capacity. At higher pore water salinity levels (5% and 10%), the sedimentation behaviour of biochar-treated soil particles deviates from expectations, showing slower sedimentation rates and lower sedimentation heights. This is because the sodium ions are adsorbed by biochar, reducing salt’s effect on dispersion and sedimentation. The results demonstrate that biochar effectively enhances the stability of saline soils and, hence, has a potential use for ground improvement in the Central Asian region.

Pollution and over-exploitation of groundwater aquifers in Kabul Province have led to deteriorated water quality and decreased quantity. In its turn, these have caused elevation of physical, chemical, and biological contaminant concentrations in the province’s groundwater beyond national and international drinking water quality standards. The article describes the outcomes of a pilot photovoltaic reverse osmosis (PV-RO) system for drinking water treatment in Qala-e-Gulbaz Village, Kabul Province, Afghanistan. The main system’s components include PV solar panels, three dosing pumps, two alternative current pumps, two alternative-to-direct-current inverters, sand and carbon filters, two sediment filters, one ultra-violet filter, two water flow meters, and a complete water supply distribution system. The study was assisted by the Danish Committee for Aid to Afghan Refugees (DACAAR) ground monitoring well (GMW) system; quality analysis of different physical, chemical, and biological parameters of raw and filtered water samples; measuring filtered water and wastewater flow rates; determining associated limitations and pressures; as well as valuating different related expenses during cost per capita calculations. Water quality testing has shown the system’s removal efficiency of 97% for salinity, 97% for total dissolved solids, above 90% for other chemicals (anions & cations), 65.52% for turbidity, and 100% for bacteria. The plant’s mean quantity efficiency has amounted to 50%. The study highlights certain key challenges including high initial cost, significant wastewater volume, and need for professional operators leading to high operational and maintenance expenditures, with the initial system’s cost per capita of USD79.54. Therefore, under the condition of optimizing efficiency, improving wastewater management, reducing original costs, implementing training programs, and developing the necessary policy framework PV-RO water treatment systems represent a viable alternative.

Работа посвящена проблемам отсутствия частного инвестирования в развитие водно-энергетического комплекса Центральной Азии. Проанализированы результаты экономического развития стран Центральной Азии в период с 2000 по 2021 год. Изучены проблемы, существующие в данной отрасли, причины, которые могут оказать негативное воздействие на экономическое развитие центральноазиатского региона, а также определены точки роста экономики данных стран. Рассмотрено воздействие Афганистана на обеспечение водой стран, находящихся в низовьях реки Амударьи. Установлено, что в странах Центральной Азии инвестиции в развитие водно-энергетического сектора происходит в основном за счет государственных источников.

In July-August, 2023, CAREC Institute, Public Opinion Research Institute, and Asian Development Bank Institute conducted a sociological survey on household energy use in the Fergana Valley spanning over the Kyrgyz Republic, Tajikistan, and Uzbekistan. The following article uses the data from that survey for investigating what determines the choice of different energy types for heating. The article concludes that high household expenditures for coal and high awareness of the harm fossil fuels can inflict on the environment and family health are insufficient to trigger a large-scale shift towards cleaner energy. To motivate households for such a shift a substantial increase in fossil fuel prices compared to electricity and other clean energy is required. This might call for a sales tax on coal. However, energy expenditure already accounts for up to one-third of household income. Low- and middle-income households would need to be compensated for increased energy spending to avoid social hardship and a backlash against such a tax.

Universities and academia in Central Asia play a crucial role in addressing climate change impacts, including rising temperatures, diminishing water resources, and increased frequency of extreme weather events threatening agriculture and livelihoods. Academic efforts must prioritize research on tailored adaptation strategies to foster resilience and sustainability. However, there's an underrepresentation of climate change research from Central Asia, emphasizing the urgent need for expanded research efforts.

Aquatic plants, including duckweed (Lemna minor), are increasingly utilized in sewage and wastewater treat-ment to improve pollution parameters and organic matter removal.

Climate change poses various challenges for agriculture and water management practices in Central Asia (CA). Central to these challenges are cryosphere dynamics, fragile mountain ecosystems, and ongoing natural hazards that highlight the need for robust projections of regional climate change. For the first time, dynamic downscaling was conducted in Central Asia at a spatial resolution of 5 km.

The research aimed to assess the influence of atmospheric processes in the Northern Hemi-sphere’s Atlantic-European Sector on the Caspian Sea level based on the data for the days with Wangenheim-Girs atmospheric general circulation forms.

Countries in Central Asia, which are highly vulnerable to climate change, experience a variety of health-related impacts to which they must adapt. At the same time, climate mitigation interventions in the health sector in the form of reduced greenhouse gas (GHG) emissions may also generate co-benefits. This article briefly outlines current understanding of the relationship between climate change impacts and human health in Central Asia and establishes a scope of inquiry based on climate and health linkages as identified by the Intergovernmental Panel on Climate Change (IPCC). It then identifies and summarizes existing research and reporting on this topic in the region as presented in published literature, country reporting to the United Nations Framework Convention on Climate Change (UNFCCC), and gray literature, including policy literature and documentation of donor-funded development interventions in the region. This review, which attempts to summarize and appraise those efforts, has found that both peer-reviewed and grey literature on this topic must be used with caution. The most frequent problems with peer-reviewed and grey literature resources involved confounding bias, and—to a lesser extent—self-reporting bias. The use of an appraisal framework for grey literature sources can frame these diverse resources in the proper context, identify potential shortcomings, and gain insights into current priorities and future direction for research on climate change and health in the region.

The study aimed to evaluate the economic and financial viability of a coal mine methane (CMM) utilization project in Central Kazakhstan, demonstrating a methodology for similar initiatives. The analysis was based on the 2013 project proposed by the US Environmen-tal Protection Agency (EPA) that intended to capture methane emissions from six coal mines for electricity generation, yet was never implemented. The study’s relevance stems from Kazakhstan's 2030 methane pledge, recent progress in the country's climate change-related policy, mineworker mortality in 2023, and the shift of mines ownership. Building upon the technical specifications of the 2013 US EPA project, this research em-ployed standard financial and economic cost-benefit analysis (CBA). The financial model utilized a traditional discounted free cash flow approach, while the economic model in-corporated additional factors like the value of statistical life (VSL), shadow pricing, as well as benefits associated with mitigating ozone health impacts, crop damage, mine ex-plosion risks, and CO2 emissions. The economic model has indicated a positive net pre-sent value of $243 mln and 42% internal rate of return. The financial analysis also sug-gests potential profitability under fair electricity and carbon pricing market conditions. To assess project robustness under varying economic and financial assumptions, the study included a sensitivity analysis. The research has likewise leveraged prior CMM-related studies in Kazakhstan and provides valuable guidance for analyzing similar projects. In addition, it also highlights the need for certain adjustments in the current legislation to incentivize such projects, as well as to promote environmental sustainability and social development by mitigating methane emissions, which aligns with Kazakhstan's climate goals.