Year: 2024
Collections: Scientific Publications
Topics: Water
Authors: Nematullah Fetrat, Ahmad Reza Rostayee, Sai Kala
Countries: Afghanistan
Source: https://water-ca.org
The article investigates certain low-cost filtering materials and their filtration efficiency for open well sources in terms of economic access to clean water in Anakapalle, a suburb of Visa-khapatnam, India, during the pre-monsoon period of 2022. The corresponding research aimed to study a selection of filter materials including coconut shell activated carbon, rice husk ash, manganese modified sand, and graphene oxide, as well as assess their performance against selected physico-chemical parameters of water. Considering the basic idea of slow sand and gravity-based filtration, a setup was arranged with a cartridge filled with layers of filtering materials and a ceramic candle filter. Adsorption turned out the most pronounced removal mechanism that took place when utilizing the aforementioned filter materials. The main focus of the study was to reduce pH, TDS, hardness, alkalinity, chlorides and iron content by applying dif-ferent filtration removal mechanisms. The study results show a significant drop in turbidity, pH, TDS and chlorides, and small reduction in hardness when coconut shell activated carbon and rice husk ash were used as filtration media. Whereas the chemically coated medium – manga-nese modified sand – demonstrated a considerable fall in iron concentrations, graphene oxide sand was observed to reduce alkalinity for any sample source.
Year: 2025
Collections: Scientific Publications
Topics: Water
Authors: Abdul Basit Da’ie, Hedayatullah Arian, Ahmad Shahir Popalzai, Homayoun Khoshnod
Countries: Afghanistan
Source: https://water-ca.org
Year: 2024
Collections: Scientific Publications
Topics: Water, Climate
Authors: Aidar Zhumabaev, Hannah Schwedhelm, Beatrice Marti, Silvan Ragettli, Tobias Siegfried
Countries: Kazakhstan
Source: https://water-ca.org
The Badam River, a tributary to the Arys River located in the Syr Darya basin, is a crucial natural resource for ecological, social, and economic activities in the semi-arid region of southern Kazakhstan. The river basin is heavily influenced by manmade water infrastructure and faces water scarcity, particularly during summer, highlighting the importance of understanding its hydrological processes for effective water resource management. In this study, a semi-distributed conceptual hydrological model of the Badam River was implemented using the RS MINERVE hydrological software to evaluate the impacts of climate change on hydrology and to test the resilience of the water system. Connected HBV models were implemented for each of the hydrological response units that were defined as altitudinal zones. The hydrological model was calibrated using daily time steps between 1979 and 2011, and the resulting flow exceedance curves and hydrographs were used to assess the potential impacts of climate change on the basin, using CMIP6 precipitation and temperature scenarios. Future climate scenarios for the 2054 – 2064 period demonstrate that the peak discharge will be shifted to spring/late spring compared to the current early summer with no significant decrease in average discharge per day of the year. The insights gained from this hydrological-hydraulic model can be used to effectively manage the water system and inform future hydropower design decisions and serve as a blueprint for similar studies in the region and elsewhere.
Year: 2020
Collections: Research Paper
Topics: Water
Authors: Krupa E., Barinova S., Romanova S., Aubakirova M., Ainabaeva N.
Countries: Kazakhstan
Year: 2022
Collections: Scientific Publications
Topics: Agriculture
Authors: Babu Suresh Chandra, Akramov Kamiljon
Countries: Tajikistan
Source:
Year: 2021
Collections: Research Paper
Topics: IWRM
Authors: Alamanos A., Zeng Q.
Countries: N/A
Year: 2021
Collections: Research Paper
Topics: IWRM
Authors: Alamanos A.
Countries: N/A
Year: 2023
Collections: Scientific Publications, Review article
Topics: Water, Water governance Water diplomacy,
Authors: Rozemarijn ter Horst, Jenniver Sehring, Alexandra Said
Countries:
Source: Journal of Hydrology X
Based on Feminist Institutionalism, this paper analyses the reasons for gender disbalance in water diplomacy. To this end, it looks at three intergovernmental decision-making forums on shared waters, namely the Nile Technical Advisory Committee, the Chu-Talas Water Commission, and the International Commission for the Protection of the Rhine. The perceived key obstacles for women’s access to decision-making positions were disciplinary gender divides that go along with a largely technical approach to water management, the gender division of labour, cultural norms, and perceptions of good leadership. While their relevance differed in the different socioeconomic, political and cultural contexts, the overall results show that male dominance in water diplomacy is not only a matter of numerical representation, but enshrined in professional norms and practices.
Year: 2024
Collections: Scientific Publications, Review article
Topics: Water, Climate, Water governance
Authors: Susanne Schmeier, Alexandra Turgul, Melissa McCracken, Zoe H. Rosenblum, Lynette de Silva, Aaron T. Wolf
Countries:
Source: Water International, 49(3-4), 274-288
This article explores major findings and evolutions in understandings of transboundary water conflict and cooperation over the last three decades, focusing on the trends emerging from the Transboundary Freshwater Diplomacy Database. It is found that since the 1940s, countries tend to cooperate over shared water resources, in contrast to media portrayals of 'water wars'. Water conflicts, which have increased slightly since 2000, are mostly fuelled by water quantity disputes or unilateral infrastructure developments. Institutions play a role in facilitating cooperation and reducing conflict over shared waters, but their growth and adoption have slowed over the last few decades.
Year: 2024
Collections: Scientific Publications
Topics: Water
Authors: Azamat Madibekov, Laura Ismukhanova, Askhat Zhadi, Botakoz Sultanbekova, Serik Zhumatayev, Alibek Karimov, Sergei Fokin
Countries: Kazakhstan
Source: https://water-ca.org
The study was conducted in 2023 and comprised a comparative assessment of the state of Lake Markakol’s aquatic ecosystems in surface and bottom water strata. The analysis of bottom water temperatures showed correlation between this parameter and dissolved oxygen concentrations, indicating that pollution caused by organic impurities leads to lake eutrophication, in turn, pro-pelling the extinction of aquatic life. Although the main water physicochemical parameters of Markakol Lake correspond to the oligotrophic type, the shifts in dissolved oxygen and phos-phate content, as well as growth of aquatic vegetation indicate its transition to the mesotrophic type. Higher phosphate content in water is a consequence of pollution disturbing the biological balance, as well as stimulating the reservoir’s eutrophication and increased biological productivity, i.e. algal bloom. In addition, phosphate ions serve an informative indicator of Hazard Class 3 (organoleptically hazardous) anthropogenic pollution. Based on the correlation factor (r), two statistical models were considered for the target lake: 1) Water Pollution: nutri-ent concentrations depending on surface and bottom water temperatures (Model 1); and 2) changes in Water Pollution Indices (biogenic, heavy metals, mean) because of air temperature growth due to global warming of 0.25°C/decade (Model 2).
Year: 2022
Collections: Scientific Publications
Topics: Water
Authors: Thevs Niels, Aliev Kumar
Countries: Kazakhstan
Source:
Year: 2018
Collections: Scientific Publications
Topics: Water
Authors: Thevs Niels, Aliev Kumar, Rouzi Ahemaitijiang, Abudushalike Nuerbayi
Countries: China
Year: 2018
Collections: Scientific Publications
Topics: Water
Authors: Thevs Niels, Aliev Kumar, Strenge Eva, Eraaliev Maksat, Lang Petra, Baibagysov Azim
Countries: Kazakhstan
Year: 2025
Collections: Scientific Publications
Topics: Water, Climate
Authors: Thevs Niels, Aliev Kumar, Baier Clara
Countries: Kyrgyzstan
Source: water-ca.org
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.
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