Andreas Langousis
YOU?
Author Swipe
Numerical Simulation of Flow Maldistribution at Pipeline Junctions in Water Distribution Networks Open
The uneven distribution of flow in water distribution networks (WDNs) can cause inefficient flows and pressure imbalances as well as degraded water quality in areas where demand is higher than the networks’ design limit. In this study, two…
Rainfall simulation based on parsimonious calibration of a multifractal canonical disaggregation scheme in the Arno river basin, Italy Open
Study region: The Arno River basin (Tuscany, Italy), located across the Northern Apennine chain. Study focus: A parsimonious approach for calibration of a multiplicative random cascade model for multifractal rainfall disaggregation is test…
View article: Considerations in multifractal downscaling of rainfall: canonical vs. microcanonical cascades
Considerations in multifractal downscaling of rainfall: canonical vs. microcanonical cascades Open
Disaggregation of rainfall time series focuses on preserving the statistical properties of those small-scale intensities, which are being downscaled from measured large-scale values. Multifractal scaling properties have offered, for a few …
Overcoming Data Limitations in Sub-Daily Rainfall Simulation Open
The need for long-term synthetic sub-daily rainfall time series is crucial in various hydrological applications, particularly in flood frequency analysis. Traditional sub-daily rainfall simulation models rely on high time-resolution data, …
Refining Rainfall Erosivity Estimation: Methodological improvements towards more accurate soil erosion assessments Open
Rainfall erosivity is a fundamental parameter in estimating soil erosion as it quantifies the potential of raindrops to detach soil particles and make them available for subsequent transport by surface runoff. Erosivity depends mainly on t…
Evolving Dependence Structures Between Compound Flood Drivers Under Future Climate Scenarios: A case study over Greater Boston Open
The assessment of compound flood risk often relies on the assumption that the dependence structure between flood drivers (e.g., rainfall intensity, coastal water levels, and streamflow) remains stationary under changing climatic conditions…
Assessing the Environmental Footprint of Suboptimal Pump Configurations in Water Distribution Systems Open
As all water supply systems are inherently energy-intensive, the operational efficiency of the pumping infrastructure significantly affects their environmental and economic performance. Suboptimal pump configurations often result in excess…
View article: The legacy of STAHY: milestones, achievements, challenges, and open problems in statistical hydrology
The legacy of STAHY: milestones, achievements, challenges, and open problems in statistical hydrology Open
Statistical tools are crucial for a variety of hydrological applications, whether to model processes and enhance understanding and knowledge or to design infrastructure systems. Given the rapid evolution of statistical methods and the need…
Leakages in Water Distribution Networks: Estimation Methods, Influential Factors, and Mitigation Strategies—A Comprehensive Review Open
While only a minimal fraction of global water resources is accessible for drinking water production, their uneven distribution combined with the climate crisis impacts leads to challenges in water availability. Leakage in water distributio…
The effects of extreme rainfall trends on compound flood risk: A case study over Greater Boston Open
Climate adaptation strategies and vulnerability assessments over coastal areas require proper modeling of the interplay and nonstationary nature of the physical processes involved in compound flooding. As a result of the reported upward tr…
Climate Risk and Vulnerability Assessment (CRVA) for the Port of Heraklion in Greece  Open
Climate change is expected to impact the maritime sector, including the port industry. Ports are on the frontline when it comes to experiencing operational challenges from the increased sea levels and extreme weather conditions, associated…
Assessing the Evolution of Intensity – Duration – Frequency Curves over Greece: A Comparative Study between 2016 and 2023 Open
The development and regular revision of the Greek National Flood Risk Management Plans (FRMPs) serve as direct response to the guidelines introduced by the Floods Directive (Directive 2007/60/EC) of the European Parliament and of the Counc…
Remotely-sensed spatiotemporal dynamics of the coupled Trichonida – Lysimachia lake system in Western Greece at the seasonal, annual, and decadal time scale Open
Understanding how the combined effects of hydroclimatic variability and anthropogenic interventions shape lake reservoirs is crucial for sustainable water resources management as well as for numerous ecosystem services. In the present stud…
A new diagram for performance evaluation of complex models Open
In the latest years the capacity and complexity of climate and environmental modeling has increased considerably. Therefore, tools and criteria for model performance evaluation are needed to ensure that different users can benefit from mod…
Exploring the Future of Rainfall Extremes Over CONUS: The Effects of High Emission Climate Change Trajectories on the Intensity and Frequency of Rare Precipitation Events Open
The impacts of climate change on extreme rainfall characteristics at fine spatiotemporal scales are governed by substantial uncertainty, primarily due to the systematic error components inherited from conventional numerical prediction syst…
Towards More Efficient Hydraulic Modeling of Water Distribution Networks Using the EPANET Software Engine Open
Hydraulic modeling of water distribution networks (WDNs) is a vital step for all water-related professionals towards the development of management practices and strategies that aim for the reduction of water losses and the associated finan…
View article: Gradient free stochastic training of ANNs, with local approximation in partitions
Gradient free stochastic training of ANNs, with local approximation in partitions Open
We present a numerical scheme for computation of Artificial Neural Networks (ANN) weights, which stems from the Universal Approximation Theorem, avoiding costly iterations. The proposed algorithm adheres to the underlying theory, is highly…
Probabilistic modelling of water distribution networks and resilient reduction of leakages: Large scale application to the city of Patras in western Greece Open
Modeling of leakages in Water Distribution Networks (WDNs) is a vital task for all water related professionals and experts towards the development of management practices and strategies, which aim at the reduction of water losses (leakages…
A probabilistic approach for detection and classification of PRV malfunctions in the water distribution network of the city of Patras in western Greece Open
Effective management of water losses in water distribution networks (WDNs) still remains a demanding task, as the temporal and spatial variability of water resources under changing climatic conditions and the increasing needs for drinking …
Investigating the effects of extreme rainfall trends on the flow capacity of streams over the Northeast United States Open
While various research efforts investigate the direct effects of climate change on hydrometeorological variables, the incidental consequences of extreme rainfall trends on the flow capacity of open channels remains an open question. Hydrol…
Combining Statistical Clustering with Hydraulic Modeling for Resilient Reduction of Water Losses in Water Distribution Networks: Large Scale Application Study in the City of Patras in Western Greece Open
Partitioning of water distribution networks (WDNs) into pressure management areas (PMAs) or district metered areas (DMAs) is the most widely applied method for the efficient management and reduction of real losses (leakages). Although PMA …
Bibliometric Literature Review of Adaptive Learning Systems Open
In this review paper, we computationally analyze a vast volume of published articles in the field of Adaptive Learning, as obtained by the Scopus Database. Particularly, we use a query with search terms targeting the area of Adaptive Learn…
Rainfall model comparison for continuous modelling for small and ungauged basins Open
The benefit of continuous modelling in hydrological studies is widely recognized since it provides the practitioner with effective hydrological outputs for risk assessment. However, this approach is still not common mainly because it needs…
A multifractal framework to evaluate extreme rainfall trends across scales under a changing climate Open
The accurate quantification of hydroclimatic risk requires detailed knowledge on the spatiotemporal characteristics of extreme rainfall. In engineering design, Intensity-Duration-Frequency (IDF) curves are fundamental tools that encompass …
Probabilistic Water Demand Forecasting Using Quantile Regression Algorithms Open
Machine and statistical learning algorithms can be reliably automated and applied at scale. Therefore, they can constitute a considerable asset for designing practical forecasting systems, such as those related to urban water demand. Quant…
View article: Intensity-dependence of interarrival times and run lengths in multifractal rainfall
Intensity-dependence of interarrival times and run lengths in multifractal rainfall Open
Mass scaling of atmospheric precipitation has been successfully characterized by multifractal frameworks in the literature dedicated to this subject. However, the dependence of the statistics of interarrival times and run lengths on the em…
Assessing future extreme rainfall trends through multifractal scaling arguments: A CONUS-wide analysis based on NA-CORDEX model outputs Open
The quantification of future flood risk, as well as the assessment of impacts attributed to the evolution of extreme rainfall events under rapidly changing climatic conditions, require multi-year information at adequately high spatiotempor…
Parametric model for probabilistic estimation of water losses in water distribution networks: A large scale real world application to the city of Patras in western Greece Open
AbstractQuantification of the leakage volume in pressure management areas (PMAs) is a vital task for water agencies financial viability. However, currently, there is no rigorous approach for their parametric modeling on the basis of networ…