Vytautas Akstinas

ORCID: 0000-0001-5752-4110
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About
Contact & Profiles
Research Areas
  • Hydrology and Watershed Management Studies
  • Hydrology and Drought Analysis
  • Climate variability and models
  • Flood Risk Assessment and Management
  • Fish Ecology and Management Studies
  • Hydrology and Sediment Transport Processes
  • Water resources management and optimization
  • Fish Biology and Ecology Studies
  • Integrated Water Resources Management
  • Transboundary Water Resource Management
  • Climate change impacts on agriculture
  • Hydrological Forecasting Using AI
  • Aquatic Invertebrate Ecology and Behavior
  • Remote Sensing and LiDAR Applications
  • European and International Law Studies
  • Soil erosion and sediment transport
  • Soil and Water Nutrient Dynamics
  • Wind Energy Research and Development
  • Geophysics and Gravity Measurements
  • Atmospheric Ozone and Climate
  • Sustainability and Climate Change Governance
  • Arctic and Antarctic ice dynamics
  • Oceanographic and Atmospheric Processes
  • Water-Energy-Food Nexus Studies
  • International Development and Aid

Lithuanian Energy Institute
2016-2025

Vilnius University
2015

Abstract. Drought events and their impacts vary spatially temporally due to diverse pedo-climatic hydrologic conditions, as well variations in exposure vulnerability, such demographics response actions. While hazard severity frequency of past drought have been studied detail, little is known about the effect management strategies on actual how perceived by relevant stakeholders. In a continental study, we characterised assessed perceptions two recent (2018 2019) Europe examined relationship...

10.5194/nhess-22-2201-2022 article EN cc-by Natural hazards and earth system sciences 2022-06-29

Abstract Since its emergence in the 1990s, science of attributing observed phenomena to human-induced and natural climate drivers has made remarkable progress. To ensure relevance uptake impact attribution studies, scientists must effectively engage with stakeholders. This engagement allows stakeholders pose key questions, which can then substantiate evidence evaluating existence causal links. Although significant advancements have been science, much work remains understand varied...

10.1088/2752-5295/ada8cc article EN cc-by Environmental Research Climate 2025-01-10

Climate projections based on global climate models (GCMs) are generally subject to large uncertainties, as the only reflect local in past a limited extent. Statistical downscaling is most cost-effective approach identify systematic biases of GCMs from and eliminate them projections. This study seeks evaluate effectiveness capturing climatic characteristics at river basin district scale by applying gridded statistical techniques using regional datasets. The historical observational datasets...

10.3390/atmos16020229 article EN cc-by Atmosphere 2025-02-18

Abstract The aim of this research is to analyse and project the effects changing climate on Lithuanian river runoff water temperature. Climate change expected affect extremes major indices that impact fundamental ecological processes in ecosystems. available temperature data rivers from three different hydrological regions Lithuania were used. HBV software was applied for modelling selected catchments. future changes projected according a new set scenarios (called representative...

10.2166/nh.2017.007 article EN Hydrology Research 2017-05-12

CR Climate Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 75:143-154 (2018) - DOI: https://doi.org/10.3354/cr01514 Recent aridity trends and future projections in Nemunas River basin Edvinas Stonevičius1, E. Rimkus1, J. Kažys1,*, A. Bukantis1, Kriaučiūienė2, V. Akstinas2, D. Jakimavičius2, Povilaitis3, L. Ložys4, Kesminas4, T. Virbickas4, Pliūraitė4 1Institute of Geosciences, Vilnius...

10.3354/cr01514 article EN Climate Research 2018-03-26

Abstract The meso-scale habitat simulation model MesoHABSIM was applied in three Lithuanian lowland rivers to study the effect of low-head hydropower plants (HPPs) on fish habitats. Stream flow time series a daily scale for period 1970–2015 were used describe regime downstream HPPs periods before and after their installation. Conditional suitability criteria developed 4 species cyprinid fish, schneider ( Alburnoides bipunctatus ), dace Leuciscus leuciscus roach Rutilus rutilus ) vimba Vimba...

10.1038/s41598-020-78701-8 article EN cc-by Scientific Reports 2020-12-10

Abstract Climate change is inevitably altering the hydrological regime of water bodies. The interest in changing behaviour intermittent rivers increasing many countries. This research was focused on (rivers which naturally, periodically cease to flow) Lithuania. purpose this provide an overview flow intermittency phenomena according available data a historical period and evaluate impact catchment geographical features climate variability zero‐flow events. calculated indices showed that...

10.1002/hyp.13912 article EN Hydrological Processes 2020-09-20

Abstract Uncertainties of runoff projections arise from different sources origin, such as climate scenarios (RCPs), global models (GCMs) and statistical downscaling (SD) methods. Assessment uncertainties related to the mentioned was carried out for selected rivers Lithuania (Minija, Nevėžis Šventoji). These reflect conditions hydrological regions (western, central southeastern). Using HBV software, were created river in near (2021–2040) far (2081–2100) future. The according three RCP...

10.2166/nh.2019.004 article EN Hydrology Research 2019-10-18

Abstract The Nemunas River basin falls within the territories of five different countries – Belarus, Lithuania, Russia, Poland and Latvia. In general, beginning spring floods highly depends on rapid rise air temperature, heavy precipitation sudden snow melting in analysed basin. this paper, conditions formation consequences two catastrophic 1958 1979 were studied regarding hydrometeorological parameters (maximum water equivalent before flood amount during flood) as well runoff coefficients...

10.2166/nh.2019.147 article EN Hydrology Research 2019-07-18

Aquatic ecosystems are particularly vulnerable to anthropogenic activity and climate change. The changes in flow regimes Lithuanian lowland rivers due the operation of hydropower plants (HPPs) impact altered on some fish species have already been studied. change future natural river runoff structure assemblages was also investigated. However, it is still unknown how combined effect regulation related generation may affect downstream reaches below HPPs. In this study, physical habitat...

10.3390/w13243508 article EN Water 2021-12-08

The quasi-biennial oscillation (further – QBO) is a quasi-periodic of the equatorial zonal wind between easterlies and westerlies in tropical stratosphere with mean period 26 to 29 months. Together other circulation mechanisms, QBO comprises global climate system which affects indices different regions globe including Lithuania. authors present paper chose address issue anomalies precipitation research encompasses time frame from 1953 2009: relationship periods without 10 more days, monthly...

10.5200/baltica.2015.28.03 article EN Baltica 2015-06-01

The increase in hydrological extremes during the last two decades has had a significant impact on natural and social environments. These depend greatly changes meteorological parameters. task of this research was to evaluate factors (snow water equivalent heavy rainfall) formation spring floods basins Nemunas, Lielupė Venta rivers. Five Lithuanian rivers (Venta, Šešuvis, Mūša, Merkys Žeimena) from these were analysed detail. fall within Western, Central Southeastern regions Lithuania....

10.1002/met.1757 article EN Meteorological Applications 2018-09-26

Abstract. Drought events and their impacts vary spatially temporally due to diverse pedo-climatic hydrologic conditions, as well variations in exposure vulnerability, such demographics response actions. While hazardous severity frequency of past drought have been studied detail, little is known about the effect management strategies on actual impacts, how hazard perceived by relevant stakeholders for inducing action. In a continental study, we characterised assessed perceptions two recent...

10.5194/nhess-2021-276 article EN cc-by 2021-10-13

Wave energy is still insufficiently explored and exploited as a future source. Climate change an additional force that affects potential changes. Therefore, this study aims to evaluate the wave under climate project it for near (2025–2044) far (2081–2100) by applying flux (WEF) approach statistical relations between wind speeds heights. The was concentrated on Baltic Sea nearshore at Lithuanian territorial water. analysis of existing heights found based historical observations reference...

10.1016/j.oceano.2023.06.004 article EN cc-by-nc-nd Oceanologia 2023-06-24

The water sector is one of the prioritised areas European Union therefore legislation encourages development methods to protect river ecosystem. key this characterization river's physical features with respect ecological quality. Rivers are a complex system where geomorphic conditions, hydrological regime, and indicators interact each other. group hydropower plants (HPPs) that forms cascade distorts natural continuity components. Analysis spatial temporal alterations in environment important...

10.2139/ssrn.4510885 preprint EN 2023-01-01

Hydromorphology of rivers assessed through direct measurements is a time-consuming and relatively expensive procedure. The rapid development unmanned aerial vehicles machine learning (ML) technologies enables the usage images to determine hydromorphological units (HMUs) automatically. application various indirect data sources their combinations for determination river HMUs from was main aim this research. Aerial with without Sobel filter, layer boulders identified using Yolov5x6, depth...

10.3390/w14244114 article EN Water 2022-12-16

1957 m. prie Hidrologijos laboratorijos vairo stojęs vienas garsiausių Lietuvos hidrologų prof. M. Lasinskas pradėjo vadovauti plataus masto vandens telkinių tyrimams. Atlikta daug įvairaus pobūdžio studijų, publikuotos svarbios monografijos. Pastaraisiais dešimtmečiais tyrimų objektai išlieka tie patys, tačiau keičiasi problematika, turima daugiau hidrologinių duomenų ir taikomi modernūs tyrimo metodai. Straipsnyje pateiktas energetikos instituto indėlis hidrologijos mokslo raidai, aprašyti...

10.6001/energetika.v62i3.3348 article LT Energetika 2016-10-03
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