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Articles 421 - 450 of 464
Full-Text Articles in Water Resource Management
Decision Tree Classification Model In Water Supply Network, Sun Jilong, Wang Ronghe, Ping Junhui, Cai Liang, Xiao Chaohong
Decision Tree Classification Model In Water Supply Network, Sun Jilong, Wang Ronghe, Ping Junhui, Cai Liang, Xiao Chaohong
International Conference on Hydroinformatics
With the service life of water supply network (WSN) growth, the growing phenomenon of aging pipe network has become exceedingly serious. As urban water supply network is hidden underground asset, it is difficult for monitoring staff to make a direct classification towards the faults of pipe network by means of the modern detecting technology. In this paper, based on the basic property data (e.g. diameter, material, pressure, distance to pump, distance to tank, load, etc.) of water supply network, decision tree algorithm (C4.5) has been carried out to classify the specific situation of water supply pipeline. Part of the historical …
Real-Time Runoff Prediction Based On Data Assimilation And Model Bias Reduction, Nemanja Branisavljevic, Christopher Hutton, Zoran Kapelan, Lydia Vamvakeridou-Lyroudia, Dragan A. Savić
Real-Time Runoff Prediction Based On Data Assimilation And Model Bias Reduction, Nemanja Branisavljevic, Christopher Hutton, Zoran Kapelan, Lydia Vamvakeridou-Lyroudia, Dragan A. Savić
International Conference on Hydroinformatics
The conceptual nature of rain-runoff models causes a significant drawback in the form of model bias. In certain types of applications, like real-time prediction, the model bias is directly mapped to the prediction result. The methodologies that are developed to improve real-time prediction, like data assimilation or real-time model calibration are taking the advantage of the information in the form of measured real-time data, but does not face the problem of model inaccuracy. In this paper the method based on data assimilation that is capable of detecting and reducing model bias (hence leading to more accurate real-time predictions) is proposed. …
Developing An Integrated Modelling System For Blue-Green Solutions, Christos Makropoulos, Evangelos Rozos, Cedo Maksimovic
Developing An Integrated Modelling System For Blue-Green Solutions, Christos Makropoulos, Evangelos Rozos, Cedo Maksimovic
International Conference on Hydroinformatics
Blue-green interventions represent the next level of integration for sustainable cities: that of an integrated urban water and urban green design, operation and management. The key concept is that a more holistic approach would present a win-win scenario, in which urban green would be utilized as infrastructure for water services (e.g. mitigating urban floods) while urban water infrastructure would be used as a source of irrigation for urban green, increasing their performance in a range of services including amenities, reducing heat island effects and increasing ecosystem services. However, this focus on integration brings into sharp relief another need: that of …
Precipitation Forecasting With Wavelet-Based Empirical Orthogonal Function And Artificial Neural Network (Weof-Ann) Model, Sanaz Imen, Ni-Bin Chang, Y. Jeffrey Yang
Precipitation Forecasting With Wavelet-Based Empirical Orthogonal Function And Artificial Neural Network (Weof-Ann) Model, Sanaz Imen, Ni-Bin Chang, Y. Jeffrey Yang
International Conference on Hydroinformatics
Western drought began since 2000 caused sharp decrease by about 100 feet in the largest reservoir of North America, Lake Mead due to the precipitation pattern shift in the upstream lower Virgin River Basin. Oceans play an important role on earth’s climate via oceanic-atmospheric interactions known as climate teleconnections, which deeply affect the terrestrial precipitation patterns. This issue signifies the necessity of developing a modern hydroinformatics tool - precipitation forecasting model - to account for teleconnection signals from climate change and mitigate drought hazards impact on lake water, quantitatively and qualitatively, which cannot be achieved by using traditional Global Circulation …
Computationally Efficient Lumped Floodplain Modelling Using Data-Driven Methods, Vincent Wolfs, Patrick Willems
Computationally Efficient Lumped Floodplain Modelling Using Data-Driven Methods, Vincent Wolfs, Patrick Willems
International Conference on Hydroinformatics
Modelling floodplains adequately is crucial for numerous water management applications. Many of these applications require a large number of simulations or long term analyses, such as optimization problems at catchment scale, uncertainty analyses or real time control of hydraulic structures to prevent flooding. Therefore, models with a limited calculation time are necessary. Various computationally efficient models exist that describe the flow in rivers, but the modelling of floodplains is often overlooked. This study focuses on the computationally efficient lumped modelling of floodplains. Two different data-driven modelling approaches are proposed that predict the inundation level in the floodplain and the flow …
Optimal Placement Of Metering Devices For Multiple Purposes, Ramon Perez, Gerard Sanz, Josep Cuguero, Miquel Angel Cuguero
Optimal Placement Of Metering Devices For Multiple Purposes, Ramon Perez, Gerard Sanz, Josep Cuguero, Miquel Angel Cuguero
International Conference on Hydroinformatics
Monitoring devices installed in a huge system like a water network imply a high cost. This cost includes installation and maintenance. Thus the placement of these devices must be optimal. The optimal sensor placement is an issue that comes up in many innovation projects in water networks. The use of models even if the final application does not use them may be crucial in such process. Nevertheless the optimality of the placement may depend highly on the final use of these sensors. In general a better placement may imply a more specific use of the information. This work studies the …
Lessons Learned In Solving The Contaminant Source Identification In An Online Context, Hervé Ung, Olivier A. Piller, Deuerlein Jochen, Denis Gilbert, Montalvo Idel
Lessons Learned In Solving The Contaminant Source Identification In An Online Context, Hervé Ung, Olivier A. Piller, Deuerlein Jochen, Denis Gilbert, Montalvo Idel
International Conference on Hydroinformatics
Protection of Water Distribution Networks (WDNs) against contamination events has a paramount importance. Either deliberate or accidental contamination of these infrastructures has strong negative consequences from both social and economical point of view. The project SMaRT-OnlineWDN aimed to develop methods and software solutions 1) to detect contamination from non-specific sensors, 2) to maintain an online water quantity and water quality model that is reliable and 3) to use the past model predictions to backtrack the potential sources of contaminations. For source identification, is more reliable velocities from an historical data base a substantial advantage compared to offline velocity predictions? The …
Towards A Decision Support System For Consequence Analysis Of Flooding On Critical Infrastructure, Andreas Burzel, Micheline Hounjet, Bernhard P.J. Becker, Antonio Di Pietro, Maurizio Pollino, Vittorio Rosato, Alberto Tofani
Towards A Decision Support System For Consequence Analysis Of Flooding On Critical Infrastructure, Andreas Burzel, Micheline Hounjet, Bernhard P.J. Becker, Antonio Di Pietro, Maurizio Pollino, Vittorio Rosato, Alberto Tofani
International Conference on Hydroinformatics
The flooding of the rivers Danube and Elbe caused: dozens of deaths; damaged bridges, streets, dams, railway lines and houses; outages of electrical power, drinking water supply, fixed and mobile telecommunication, water level gauges and purification plants; and crop shortfall. The analysis of the events and emergency response actions exposed flaws in preparedness and the understanding of emergency responders of the need to protect critical infrastructure. For instance, water level gauges failed, flood models for extreme amounts of water were flawed, emergency call numbers became unreachable and first responders could not communicate. As a consequence, protection and evacuation measures could …
Numerical Modeling Of The Fecal Bacteria Transport Processes In Sediment-Laden Flow, Guoxian Huang, Roger Falconer, Binliang Lin
Numerical Modeling Of The Fecal Bacteria Transport Processes In Sediment-Laden Flow, Guoxian Huang, Roger Falconer, Binliang Lin
International Conference on Hydroinformatics
Many experiments, field measurements and few numerical tests shows the transport and fate of Faecal Bacteria have a tight relationship of the sediment transport including the absorbing, releasing and changing the radiation of sunshine especially in the fine cohesive particles and etc. The nonuniform distribution of 2-D and 3-D structures of hydrodynamic, salinity and suspended sediment (SS) in the riverine and estuary may make the solution of Faecal Bacteria to become more complex. With related measured data, the different coupling models based on modified EFDC 2D model are built to solve the dynamic processes of Faecal Bacteria and decouple the …
Water Supply Operating Rules In Parallel Dams By Means Of Genetic Algorithms, Rosalva Mendoza-Ramírez, Maritza L. Arganis, Ramón Domínguez Mora, Gerardo Acuna
Water Supply Operating Rules In Parallel Dams By Means Of Genetic Algorithms, Rosalva Mendoza-Ramírez, Maritza L. Arganis, Ramón Domínguez Mora, Gerardo Acuna
International Conference on Hydroinformatics
Cutzamala system is the most important hydraulic work that the Mexico State had provided to Mexico’s center region; its objective is the water supply with at least 16 m3/s to the country’s capital, since 1974. The system consist of Tuxpan and El Bosque dams, both located in Michoacán State, and Ixtapan del Oro, Villa Victoria, Valle de Bravo, Chilesdo and Colorines dams located in Mexico State; each one belong to Cutzamala River Basin. At the Institute of Engineering of the National Autonomous University of Mexico studies have been done since the mid-90s of last century in order to obtain optimal …
Study Of Wave-Induced Scour Depth Around Group Of Piles Using Support Vector Machines, Samaneh Ghazanfari Hashemi, Tetsuya Hiraishi, Amir Reza Mansoori
Study Of Wave-Induced Scour Depth Around Group Of Piles Using Support Vector Machines, Samaneh Ghazanfari Hashemi, Tetsuya Hiraishi, Amir Reza Mansoori
International Conference on Hydroinformatics
Various arrangements of pile groups are widely being used as supports of marine structures. As piles are located on erodible beds of the sea, scouring is a threat to such structures and the scour depth amounts should be considered well in their designs. Though most of these supports are constructed in form of groups of piles, majority of studies were concentrated on predictions of scouring around single piles whereas the arrangement of the piles and the spaces between them in arrangements as well as their geometry, sediment and wave characteristics should also be studied. Despite the importance of the scour …
Effect Of Different Hydrological Model Structures On The Assimilation Of Distributed Uncertain Observations, Maurizio Mazzoleni, Leonardo Alfonso, Dimitri P. Solomatine
Effect Of Different Hydrological Model Structures On The Assimilation Of Distributed Uncertain Observations, Maurizio Mazzoleni, Leonardo Alfonso, Dimitri P. Solomatine
International Conference on Hydroinformatics
The reliable evaluation of the flood forecasting is a crucial problem for assessing flood risk and consequent damages. Different hydrological models (distributed, semi-distributed or lumped) have been proposed in order to deal with this issue. The choice of the proper model structure has been investigated by many authors and it is one of the main sources of uncertainty for a correct evaluation of the outflow hydrograph. In addition, the recent increasing of data availability makes possible to update hydrological models as response of real-time observations. For these reasons, the aim of this work it is to evaluate the effect of …
The Typical Organic Pollutants Health Risk Research Of The Main Source Water In Yellow River Basin, Gao Jijun
The Typical Organic Pollutants Health Risk Research Of The Main Source Water In Yellow River Basin, Gao Jijun
International Conference on Hydroinformatics
Although the contamination of the organic pollutants had been reported to occur in the Yellow River basin, few studies had been done on the source water contamination and health risk of Yellow River basin. To understand the typical organic pollutant contamination status of the main source water in Yellow River basin, samples were collected from fifty source water points (including reservoir and river) in Yellow River basin. The samples were analyzed for the representative organic pollutants, including Benzene homology, Chlorobenzene compounds, organophosphorous pesticides, and Nitrobenzene compounds, total 17 compounds. It was observed that the concentrations of the 17 compounds in …
Leakage Detection And Localization Method Based On A Hybrid Inverse/Direct Modelling Approach Suitable For Handling Multiple-Leak Scenarios, Jordi Meseguer, Josep M. Mirats, Gabriela Cembrano, Vicenç Puig, Eduard Bonada
Leakage Detection And Localization Method Based On A Hybrid Inverse/Direct Modelling Approach Suitable For Handling Multiple-Leak Scenarios, Jordi Meseguer, Josep M. Mirats, Gabriela Cembrano, Vicenç Puig, Eduard Bonada
International Conference on Hydroinformatics
When an accurate hydraulic network model is available, direct modeling techniques are very straightforward and reliable for on-line leakage detection and localization applied to large class of water distribution networks. In general, this type of techniques based on analytical models can be seen as an application of the well-known fault detection and isolation theory for complex industrial systems. Nonetheless, the assumption of single leak scenarios is usually made considering a certain leak size pattern which may not hold in real applications. Upgrading a leak detection and localization method based on a direct modeling approach to handle multiple-leak scenarios can be, …
A Decision Support System For Identifying Real Losses In Water Distribution Networks, Gabriele Freni, Vincenza Notaro, Chiara Maria Fontanazza, Barbara Milici, Valeria Puleo, Mauro De Marchis
A Decision Support System For Identifying Real Losses In Water Distribution Networks, Gabriele Freni, Vincenza Notaro, Chiara Maria Fontanazza, Barbara Milici, Valeria Puleo, Mauro De Marchis
International Conference on Hydroinformatics
The investigation of real losses is of paramount importance for water utility willing to control operational costs and environmental and social impacts of water supply. Real losses reduction could be achieved by continuous maintenance actions and occasional pipe substitutions. Maintenance activities in the distribution network represent one of the largest items in a water utility economic balance and, therefore, any approach aimed at maintenance optimization catches the interest of water managers. These strategies are constrained by the amount of funds, which are usually available not in a single instalment but yearly and spread over a time period of several years. …
Regional Water Balance Assessment - Case Study : Youngjongdo Island In Incheon, Korea, Seongjoon Byeon, Gyewoon Choi, Jaekwang Jung, Seungkwon Jung
Regional Water Balance Assessment - Case Study : Youngjongdo Island In Incheon, Korea, Seongjoon Byeon, Gyewoon Choi, Jaekwang Jung, Seungkwon Jung
International Conference on Hydroinformatics
In Korea repeatedly experiences floods and droughts that cause traumatic environmental conditions with huge economic impact. With an approach and solution such as Smart Water Grid these problems can be alleviated. Tapping into the retention ponds behind dams, rainfall harvest facilities in urban areas and any other structures installed to store rainfall water during flood events will mitigate the damage of flooding and provide a new source of national water resources. Similarly, purified waste water, ground water and desalinated sea water can also feasible to use as alternative water resources. In this study, the water balance assessment model is being …
Precipitation Sensor Network Optimal Design Using Time-Space Varying Correlation Structure, Juan Carlos Chacon-Hurtado, Leonardo Alfonso, Dimitri P. Solomatine
Precipitation Sensor Network Optimal Design Using Time-Space Varying Correlation Structure, Juan Carlos Chacon-Hurtado, Leonardo Alfonso, Dimitri P. Solomatine
International Conference on Hydroinformatics
Design of optimal precipitation sensor networks is a common topic in hydrological literature, however this is still an open problem due to lack of understanding of some spatially variable processes, and assumptions that often cannot be verified. Among these assumptions lies the homoscedasticity of precipitation fields, common in hydrological practice. To overcome this, it is proposed a local intensity-variant covariance structure, which in the broad extent, provides a fully updated correlation structure as long as new data are coming into the system. These considerations of intensity-variant correlation structure will be tested in the design of a precipitation sensor network for …
Flash Flood Simulation Using Geomorphic Unit Hydrograph Method: Case Study Of Headwater Catchment Of Xiapu River Basin, China, Dawei Zhang, Jin Quan, Fan Wang, Xiaoyan He
Flash Flood Simulation Using Geomorphic Unit Hydrograph Method: Case Study Of Headwater Catchment Of Xiapu River Basin, China, Dawei Zhang, Jin Quan, Fan Wang, Xiaoyan He
International Conference on Hydroinformatics
The flash flood refers to flood produced by heavy local rainfalls and often occurs in mountainous areas. It is characterized by a quick rise of water level causing a great threat to the lives of those exposed. Many countries and regions face the threat of flash floods. However, some traditional hydrological models can hardly simulate the flash flood process well due to the lack of hydrological data and the insufficient understanding of complicated runoff mechanism in mountainous and hilly areas. According to this condition, a new hydrological model based on the framework of Xinanjiang model, widely used in humid and …
Committees Of Specialized Conceptual Hydrological Models: Comparative Study, Nagendra Kayastha, Dimitri P. Solomatine
Committees Of Specialized Conceptual Hydrological Models: Comparative Study, Nagendra Kayastha, Dimitri P. Solomatine
International Conference on Hydroinformatics
Committee modelling approach is skillful prediction in the domain of hydrological modelling that allows explicitly to derive predictive model outputs. In this approach, the different individual models are optimally combined. Generally if a single hydrological model or the model calibrated by the single aggregated objective function it is hard to capture all facets of a complex process and to present the best possible model outputs. This model could be either capable for high flows or for low flows or not for both cases hence more flexible modelling architectures are required. Here the possibilities is building several specialized models each of …
Hybrid Model Approach To Water Monitoring Network Design, Paulin Coulibaly, Jos Samuel
Hybrid Model Approach To Water Monitoring Network Design, Paulin Coulibaly, Jos Samuel
International Conference on Hydroinformatics
Hybrid modeling approach including regionalization method, entropy technique, and Bayesian multiobjective optimization algorithm is proposed for optimum water monitoring network design. For hydrometric network design, all the components of the hybrid model are used as follows. Robust regionalization method is used to generate streamflow at all possible locations of new stations, and dual entropy-multiobjective optimization methods are used to optimize the number and locations of the new stations. For precipitation (rainfall or snowfall) network design, only the dual entropy-multiobjective optimization modules are used to optimize the number and locations of new stations based on an initial grid points which can …
Modeling Shallow Water Flow And Transport Processes With Small Water Depths Using The Hydroinformatics Modelling System, Ilhan Özgen, Franz Simons, Jiaheng Zhao, Reinhard Hinkelmann
Modeling Shallow Water Flow And Transport Processes With Small Water Depths Using The Hydroinformatics Modelling System, Ilhan Özgen, Franz Simons, Jiaheng Zhao, Reinhard Hinkelmann
International Conference on Hydroinformatics
In hydro- and environmental systems modelling, there are several application cases where very small water depths occur, for example rainfall and runoff in natural or urban catchments, possibly associated with tracer transport. In these cases, the water depth may be in the range of millimeters to a few centimeters. The numerical simulation of the associated processes is complex, therefore robust numerical schemes are required. Two test cases using high resolution topography data are investigated with the Hydroinformatics Modelling System (HMS). In the first case, the influence of microtopography and local depressions were analyzed in an idealized urban catchment; both had …
Development Of Water Pollution Early Warning System For Oyster Harvesting Areas, Zhiqiang Deng
Development Of Water Pollution Early Warning System For Oyster Harvesting Areas, Zhiqiang Deng
International Conference on Hydroinformatics
The objective of this study is to develop a Pollution Early Warning System (PEWS) for efficient management of water quality in oyster harvesting areas. To that end, this paper presents a web-enabled, user-friendly PEWS for managing water quality in oyster harvesting areas along Louisiana Gulf Coast, USA. The PEWS consists of (1) an Integrated Space-Ground Sensing System (ISGSS) gathering data for environmental factors influencing water quality, (2) an Artificial Neural Network (ANN) model for predicting the level of fecal coliform bacteria, and (3) a web-enabled, user-friendly Geographic Information System (GIS) platform for issuing water pollution advisories and managing oyster harvesting …
Comparison Of 2d Numerical Schemes For Modelling Supercritical And Transcritical Flows Along Urban Floodplains, Yared Abayneh Abebe, Solomon D. Seyoum, Zoran Vojinović, Roland K. Price
Comparison Of 2d Numerical Schemes For Modelling Supercritical And Transcritical Flows Along Urban Floodplains, Yared Abayneh Abebe, Solomon D. Seyoum, Zoran Vojinović, Roland K. Price
International Conference on Hydroinformatics
Urban floodplains usually have irregular geometry due to different obstacles, urban infrastructures and slope conditions. This may change the flow regime from subcritical to supercritical flow conditions, and vice versa. Implementation of the full momentum equation in 2D shallow water equations (SWEs) is not trivial in mixed flow conditions as subcritical and supercritical flows require different boundary conditions and hence different solution algorithms. Some models ignore the convective acceleration term (CAT) to simplify implementation of the momentum equation for mixed flow conditions. This work tried to investigate the effect of neglecting CATs by testing two 2D models which implement - …
Thermoclinic Assessment Of A Preliminary Circulation Model For Lake George In The Jefferson Project, Emanuele Ragnoli, Fearghal O Donncha, Jeffrey W. Short, Imad A. Hannoun, Sandra A. Nierzwicki-Bauer, Lloyd A. Treinish, Anthony P. Priano, Charles W. Boylen
Thermoclinic Assessment Of A Preliminary Circulation Model For Lake George In The Jefferson Project, Emanuele Ragnoli, Fearghal O Donncha, Jeffrey W. Short, Imad A. Hannoun, Sandra A. Nierzwicki-Bauer, Lloyd A. Treinish, Anthony P. Priano, Charles W. Boylen
International Conference on Hydroinformatics
The Jefferson Project is a collaboration between the Rensselaer Polytechnic Institute, IBM, and the FUND for Lake George aimed at understanding and managing complex factors (road salt, storm water runoff, invasive species) threatening Lake George, New York. Lake George is located about 80 km north of Albany in upstate New York and is known internationally for its water clarity. Understanding the hydrodynamics of the lake is fundamental for creation and maintenance of a research and monitoring program for the early detection of and response to adverse environmental and biological change. In this work a 3D circulation model of the lake …
Application Of Real-Time Control Strategy To Improve Nitrogen Removal In Wastewater Treatment, Qibin Wang, Qiuwen Chen, Jinfeng Ma, Qiang Xu
Application Of Real-Time Control Strategy To Improve Nitrogen Removal In Wastewater Treatment, Qibin Wang, Qiuwen Chen, Jinfeng Ma, Qiang Xu
International Conference on Hydroinformatics
Biological nitrogen removal is an important task in the wastewater treatment. However, the actual removal of total nitrogen (TN) in the wastewater treatment plant (WWTP) is often unsatisfactory due to several causes, one of which is the insufficient availability of carbon source. One possible approach to improve the nitrogen removal therefore is addition of external carbon source, while the amount of which is directly related to operation cost of a WWTP. It is obviously necessary to determine the accurate amount of addition of external carbon source according to the demand depending on the influent wastewater quality. This study focused on …
Distribution Of Hydrological Losses For Varying Rainfall And Antecedent Wetness Conditions, Sithara H P Walpita Gamage, Guna Hewa, Simon Beecham
Distribution Of Hydrological Losses For Varying Rainfall And Antecedent Wetness Conditions, Sithara H P Walpita Gamage, Guna Hewa, Simon Beecham
International Conference on Hydroinformatics
Hydrological loss is a vital component in many hydrological models, which are usedin forecasting floods and evaluating water resources for both surface and subsurface flows. Due to the complex and random nature of the rainfall runoff process, hydrological losses are not yet fully understood. Consequently, practitioners often use representative values of the losses for design applications such as rainfall-runoff modelling which has led to inaccurate quantification of water quantities in the resulting applications. The existing hydrological loss models must be revisited and modellers should be encouraged to utilise other available data sets. This study is based on three unregulated catchments …
Simulation Of Non-Point Source Pollution In Zhang River Basin, Xiaojuan Lin, Jinhui Huang
Simulation Of Non-Point Source Pollution In Zhang River Basin, Xiaojuan Lin, Jinhui Huang
International Conference on Hydroinformatics
Since 1987, the China Government started the “The Water Resource Protection and Management of Haihe River Basin” program aimed at tackling the problem of water pollution and realizing the comprehensive control of the ecosystem and water resources in the whole basin. This study aims to model one of the program’s catchments – Zhang River Basin (ZRB), which is a typical area with the striking water scarcity and water quality deterioration in Haihe River Basin (HRB). The distributed hydrological model SWAT(Soil and Water Assessment Tool) was used to simulate all related processes affecting water quantity, sediment, and nutrient loads in the …
A Novel Nested Dynamic Programming (Ndp) Algorithm For Multipurpose Reservoir Optimization, Blagoj Delipetrev, Andreja Jonoski, Dimitri P. Solomatine
A Novel Nested Dynamic Programming (Ndp) Algorithm For Multipurpose Reservoir Optimization, Blagoj Delipetrev, Andreja Jonoski, Dimitri P. Solomatine
International Conference on Hydroinformatics
We present a novel nDP (nested dynamic programming) algorithm for multipurpose reservoir optimization. The nDP algorithm is built from two algorithms: 1) dynamic programming (DP) and 2) nested optimal water allocation algorithm implemented with Simplex and quadratic Knapsack. The main objective function is to minimize the sum of weighted square deviations of each objective over the whole time horizon. Each objective is described with its water demand or target and its weights at each time step. The nDP algorithm begins with the DP optimization algorithm that at each DP transition executes the nested optimal water allocation algorithm. The optimal water …
Parameterization Of Turbulence Models Using 3dvar Data Assimilation, Agnieszka Indiana Olbert, Stephen Nash, Emanuele Ragnoli, Michael Hartnett
Parameterization Of Turbulence Models Using 3dvar Data Assimilation, Agnieszka Indiana Olbert, Stephen Nash, Emanuele Ragnoli, Michael Hartnett
International Conference on Hydroinformatics
In this research the 3DVAR data assimilation scheme is implemented in the numerical model DIVAST in order to optimize the performance of the numerical model by selecting an appropriate turbulence scheme and tuning its parameters. Two turbulence closure schemes: the Prandtl mixing length model and the two-equation k-ε model were incorporated into DIVAST and examined with respect to their universality of application, complexity of solutions, computational efficiency and numerical stability. A square harbour with one symmetrical entrance subject to tide-induced flows was selected to investigate the structure of turbulent flows. The experimental part of the research was conducted in a …
A Web-Based Hydroinformatic Platform For Water Quality Modelling And Simulation In A River Basin, Jose Pinho, Jose Vieira
A Web-Based Hydroinformatic Platform For Water Quality Modelling And Simulation In A River Basin, Jose Pinho, Jose Vieira
International Conference on Hydroinformatics
In recent years a major effort has been done to make water quality modelling tools available for water resources management at a river basin scale. The European water framework directive clear states that these tools must be used in making the diagnostic of surface water bodies water quality status and to anticipate the impact of measures to be implemented in order to achieve a good ecological status by 2015 in European waters. In order to make modelling tools usable by all the actors enrolled in water resources management process at river basins, these tools must be simple, user-friendly and robust. …