A5016172588- Hydrology and Watershed Management Studies
- Flood Risk Assessment and Management
- Hydrology and Drought Analysis
- Water resources management and optimization
- Groundwater flow and contamination studies
- Hydraulic flow and structures
- Water Systems and Optimization
- Climate variability and models
- Reservoir Engineering and Simulation Methods
- Hydrology and Sediment Transport Processes
- Precipitation Measurement and Analysis
- Hydrological Forecasting Using AI
- Fire effects on ecosystems
- Water management and technologies
- Constructed Wetlands for Wastewater Treatment
- Groundwater and Watershed Analysis
- Climate change impacts on agriculture
- Numerical Methods and Algorithms
- Housing Market and Economics
- Transboundary Water Resource Management
- Geological Modeling and Analysis
- 3D Surveying and Cultural Heritage
- 3D Modeling in Geospatial Applications
- Wastewater Treatment and Reuse
- Environmental Science and Water Management
National Technical University of Athens
2012-2023
Institut de Chimie Moléculaire de Grenoble
1988
A new, three-parameter friction model at the boundaries of free surface flow is proposed. The valid for all and roughness characteristics it proposed to replace widely used Manning equation in flood simulation models. In gauged domains, parameters can be calibrated directly using appropriate field data. For ungauged are estimated following a four-step procedure: (1) selection zones; (2) generation synthetic data from water depth—flow velocity—roughness height combinations; (3) calculation...
A parametric rule for multireservoir system operation is formulated and tested. It a generalization of the well‐known space simultaneously accounting various operating goals, in addition to standard goal avoiding unnecessary spills, including leakage losses, conveyance problems, taking into account impacts reservoir topology, assuring satisfaction secondary uses. Theoretical values rule's parameters each one these isolated goals are derived. In practice, evaluated optimize or more objective...
Abstract. The modelling of human-modified basins that are inadequately measured constitutes a challenge for hydrological science. Often, models such systems detailed and hydraulics-based only one part the system while other parts oversimplified or rough assumptions used. This is typically bottom-up approach, which seeks to exploit knowledge processes at micro-scale some components system. Also, it monomeric approach in two ways: first, essential interactions among may be poorly represented...
The present work aims to assess the spatial variability and trends of annual rainfall meteorological drought in entire territory Greece utilising ERA5 reanalysis precipitation dataset European Centre for Medium-Range Weather Forecasts (ECMWF), which spans from January 1940 December 2022 (an 83-year period). Drought assessment took place based on Standardized Precipitation Index (SPI) timescales ranging 1 month 12 months. Evaluation was carried out by calculating SPI using observed data five...
River basins are by definition temporally-varying systems: changes apparent at every temporal scale, in terms of changing meteorological inputs and catchment characteristics due to inherently uncertain natural processes anthropogenic interventions. In an operational context, the ultimate goal hydrological modelling is predicting responses basin under conditions that similar or different those observed past. Since water management studies require effects considered known a long hypothetical...
Abstract. The HYDROGEIOS modelling framework represents the main processes of hydrological cycle in heavily modified catchments, with decision-depended abstractions and interactions between surface groundwater flows. A semi-distributed approach a monthly simulation time step are adopted, which sufficient for water resources management studies. philosophy aims to ensure consistency physical characteristics system, while keeping number parameters as low possible. Therefore, multiple levels...
Abstract A hydrological simulation model was developed for conjunctive representation of surface and groundwater processes. It comprises a conceptual soil moisture accounting module, based on an enhanced version the Thornthwaite reservoir, Darcian multi-cell flow module partitioning water abstractions among resources. The resulting integrated scheme is highly flexible in choice time (i.e. monthly to daily) space scales (catchment scale, aquifer scale). Model calibration involved successive...
Abstract A methodology is proposed for constructing flood frequency curves before and after forest fires in small ungauged basins. It follows the rainfall-based derived distribution approach using Monte Carlo simulation allowing uncertainty some of variables involved. The generalized extreme value annual maximum rainfall used, combined with SCS-CN method estimating excess, rational peak flow estimation. For pre-fire conditions, spatially-averaged curve number assumed. post-fire measurements...
Abstract A modelling scheme is developed for real-time flood forecasting. It composed of (a) a rainfall forecasting model, (b) conceptual rainfall-runoff and (c) stochastic error model the ARMA family forecast correction. Initialization based on running this daily basis certain period prior to onset while parameters are updated through Recursive Least Squares algorithm. The suitable early stages operation systems in presence inadequate historical data. validation framework set up which...
The impact of uncertainty in ground elevation on the extent areas that are inundated due to flooding is investigated. Land surface represented through a Digital Surface Model (DSM). effect DSM compared rainfall. Monte Carlo method used quantify uncertainty. A typical photogrammetric procedure and conventional maps obtain reference DSM, later altered provide DSMs lower accuracy. Also, data from Shuttle Radar Topography Mission used. Floods simulated two stages. In first stage, flood...