Challenges In The Simultaneous Development And Deployment Of A Large Integrated Modelling System,
2014
City University of New York (CUNY)
Challenges In The Simultaneous Development And Deployment Of A Large Integrated Modelling System, Matthew Paul Stenson, Peter Fitch, Dave Penton, Jamie Vleeshouwer, Ben Leighton, Jean-Michel Perraud, Garth Warren, Daniel Collins
International Conference on Hydroinformatics
Many of our natural resource management issues cannot be adequately informed by a single discipline or sub-discipline, and require an integration of information from multiple natural and human systems. As we are unable to observe and monitor more than a few important indicators there is a strong reliance on supplementing observed information with modelled information. Following a period of record drought in the 1990’s, the Australian government recognised the need for better quality, more integrated, and nationally consistent water information. The Australian Water Resources Assessment system (AWRA) is an integrated hydrological modelling system developed by CSIRO and Australian Bureau of …
Comparison Of Three Methods For Spatial Distribution Of Error-Correction Algorithms,
2014
City University of New York (CUNY)
Comparison Of Three Methods For Spatial Distribution Of Error-Correction Algorithms, Xuan Wang, Vladan Babovic
International Conference on Hydroinformatics
Data assimilation is a useful tool to correct the discrepancies of numerical model results by extracting reliable information from observed data. One of popular data assimilation techniques is the spatial distribution based on error-correction, since it can address the challenge when number of monitoring stations is limited. Current research only focuses on the estimation of spatial distribution pattern, or the improvement of the competence of different spatial distribution methods, but lacks the comparison either in their characteristics or in the performances. In this study, we compared three different approaches, Kriging, Artificial Neural Network (ANN) and inter-model correlation inspired by Kalman …
Predicting Baseflow Using Genetic Programing,
2014
City University of New York (CUNY)
Predicting Baseflow Using Genetic Programing, Ali Meshgi, Petra Schmitter, Vladan Babovic, Ting Fong May Chui
International Conference on Hydroinformatics
Developing reliable methods to estimate baseflow has been a subject of research interest over the past decades due to its importance in catchment response and sustainable watershed management (e.g. ground water recharge vs. extraction). Limitations and complexities of existing methods have been addressed by a number of researchers. For instance, physically based numerical models are complex, requiring substantial computational time and data which may not be always available. Artificial Intelligence (AI) tools such as Genetic Programming (GP) have been used widely to reduce the challenges associated with complex hydrological systems without losing the physical meanings. However, up to date, in …
Ripost: A River Pollution Simulation Tool To Anticipate The Consequence Of Accidental Spills,
2014
City University of New York (CUNY)
Ripost: A River Pollution Simulation Tool To Anticipate The Consequence Of Accidental Spills, Emma Florens, François Thouvenel, Johann Mazzella, Thomas Thouvenot, Emmanuel Soyeux
International Conference on Hydroinformatics
Accidental pollutant spills are frequent and their impact on water uses downstream difficult to assess precisely in the framework of a crisis management. Therefore, a specific tool, named RIPOST, dedicated to drinking water treatment plant operators was developed to anticipate the consequence of a spill upstream the plant intake. As a decision support tool, RIPOST had to fulfil operational needs: ease of use for operators, quick calculation and providing key information for decision making. A new numerical pollutant spill and transport model has been developed by using integrated Eulerian method under the Telemac 2D software instead of the 1D model …
Merging Top-View Lidar Data With Street-View Sfm Data To Enhance Urban Flood Simulation,
2014
City University of New York (CUNY)
Merging Top-View Lidar Data With Street-View Sfm Data To Enhance Urban Flood Simulation, Vorawit Meesuk, Zoran Vojinović, Arthur E. Mynett
International Conference on Hydroinformatics
Top-view data obtainedfrom LiDAR systemshas long been used as topographic-input data for urban flood modelling applications. This high-resolution input data has considerable potential to improve urban flood modelling predictions with more detail. However, the difficulty of employing top-view data is that it may create some missing urban features because this type ofdata cannot represent anyurban features,which are hiddenunderneath other objects. These hidden featuresmay play a substantial part in diverting floodwater flowing through,especially in complex urban areas. The recent advances in Photogrammetry and Computer Vision techniques offer an opportunity to create high-resolution topographic data. By using a consumer digital camera,2Ddigital photoscan …
Benefits Of A Surveillance And Response System (Srs) Dashboard - The Philadelphia Water Department Experience,
2014
City University of New York (CUNY)
Benefits Of A Surveillance And Response System (Srs) Dashboard - The Philadelphia Water Department Experience, Yakir Hasit, John Vogtman
International Conference on Hydroinformatics
The Philadelphia Water Department (PWD) developed a comprehensive Surveillance and Response System (SRS) (formerly Contamination Warning System) for its drinking water system under a Water Security initiative grant from the U.S. Environmental Protection Agency. A full-scale SRS is comprised of four monitoring/surveillance components – online water quality monitoring (OWQM), enhanced security monitoring, consumer complaint surveillance, and public health surveillance, and two response components – consequence management and sampling and analysis. The integration of multiple information streams is a core element of an SRS. Taken separately, each surveillance component provides its own set of event triggers that have value for event …
Sustainability Of Dual Water Distribution Systems For Fire Flow Condition,
2014
City University of New York (CUNY)
Sustainability Of Dual Water Distribution Systems For Fire Flow Condition, Nazli Yonca Aydin, Larry Mays, Theo G. Schmitt
International Conference on Hydroinformatics
The objective of this study is to compare the sustainability of current water systems when a dual water distribution system (WDS) is used for the non-potable water purposes of fire protection, irrigation, and toilet flushing. Sustainability of urban WDS is evaluated in terms of hydraulic efficiency and water quality. The first step is to assess sustainability of an example urban WDS by using sustainability index (SI). The SI is measured by reliability, resiliency, and vulnerability performance indices. Pressure and water age are selected as main parameters to determine sustainability. Once the SIs for pressure and water age are calculated by …
Environmental Data Store: Design And Implementation,
2014
City University of New York (CUNY)
Environmental Data Store: Design And Implementation, Peng Ji, Michael Piasecki
International Conference on Hydroinformatics
In this paper we present the design and implementation of Environmental data store (EDS). We also highlight the Environmental Thesaurus Server (EnvThs), a standalone web application developed by us, providing semantic support on submission and search within EDS. With the rapid growth in data volumes, data diversity and data demands from multi-disciplinary research effort, data management and exploitation are increasingly facing significant challenges for environmental scientific community. We describe Environmental data store (EDS), a system we are developing that is a web-based system following an open source implementation to manage and exploit multi-data-type environmental data. EDS provides repository services for …
Visual Analytics Clarify The Scalability And Effectiveness Of Massively Parallel Many-Objective Optimization: A Groundwater Monitoring Design Example,
2014
City University of New York (CUNY)
Visual Analytics Clarify The Scalability And Effectiveness Of Massively Parallel Many-Objective Optimization: A Groundwater Monitoring Design Example, Patrick M. Reed
International Conference on Hydroinformatics
In this study, we contribute a comprehensive assessment of massively parallel multiobjective evolutionary algorithm (MOEA)-based search using a highly challenging optimization—assimilation application. The application focuses on a four objective groundwater monitoring application in which parallel scalability is tested across compute core counts ranging from 64 to a maximum of 8192. Our many-objective visual analytics framework clarifies how to assess and attain highly effective search on large scale high-performance computing systems. Moreover, our results also refute the common assumption that adding objectives in many-objective evolutionary optimization will always increase the computational difficulty of a problem. Our results agree with prior theoretical …
Hydrolapse Videography: A Coupled Hydroinformatic Stack For Improved Visual Assessment Of River Dynamics,
2014
City University of New York (CUNY)
Hydrolapse Videography: A Coupled Hydroinformatic Stack For Improved Visual Assessment Of River Dynamics, Joshua Viers, Nicholas Santos
International Conference on Hydroinformatics
A central problem for managers of river ecosystems is understanding hydrodynamics in an intelligible fashion for effective decision-making. Too often decisions are based on some combination of incomplete hydrologic time series, poorly parameterized models, photographic snapshots of the place in question, and human imagination. Because river ecosystems are dynamic, with ever changing physical dimensions, inferences are made to make up for unknowns, which remain knowledge gaps. This is particularly true in the pursuit of ecogeomorphology, which seeks to understand the interplay between physical processes and ecological responses in river systems over time. Increasing deployment of affordable sensors, however, is beginning …
Model Prediction Control For Water Management Using Adaptive Prediction Accuracy,
2014
City University of New York (CUNY)
Model Prediction Control For Water Management Using Adaptive Prediction Accuracy, Xin Tian, Rudy Negenborn, Peter-Jules Van Overloop, Erik Mostert
International Conference on Hydroinformatics
In the field of operational water management, Model Predictive Control (MPC) has gained popularity owing to its versatility and flexibility. The MPC controller, which takes predictions, time delay and uncertainties into account, can be designed for multi-objective management problems and for large-scale systems. Nonetheless, a critical obstacle, which needs to be overcome in MPC, is the large computational burden when a large-scale system is considered or a long prediction horizon is involved. In order to solve this problem, we use an adaptive prediction accuracy (APA) approach that can reduce the computational burden almost by half. The proposed MPC scheme with …
An Information Model For Exchanging Hydrological Rating Tables,
2014
City University of New York (CUNY)
An Information Model For Exchanging Hydrological Rating Tables, Peter Taylor, Paul Sheahan, Stuart Hamilton, David Briar, Matthew J. Fry, Michael Natschke, David Valentine, Gavin Walker
International Conference on Hydroinformatics
Many hydrological data systems provide Internet access to observational and processed data in various forms, from websites to web services. This data is generally described with basic metadata, such as units, names of measured variables, spatial coordinates, and so on. This metadata is largely suitable for further analysis or ingestion into hydrological models. However, when the data has been processed through many – potentially complex – steps, more information is required to give users details of implicit assumptions, inaccuracies, or uncertainties that may have been introduced. A common example of this within hydrology is the use of ratings tables to …
Risk Based Analysis For Assessment Of Integrated Urban Water System Watermet2 Model: A Case Study Of Oslo,
2014
City University of New York (CUNY)
Risk Based Analysis For Assessment Of Integrated Urban Water System Watermet2 Model: A Case Study Of Oslo, Rita Maria Ugarelli, Kourosh Behzadian, Maria Ceu Almeida, Tonino Liserra, Patrick Smeets, Zoran Kapelan
International Conference on Hydroinformatics
Integrated urban water systems (IUWSs) generally comprise the components related to both water supply and waste water systems. These components are subject to uncertainty in terms of operation, management and information. Hence, assessment of strategies in the IUWSs over the planning horizon should include such a risk analysis of these uncertainties. Owning to the complexity of these risks, a comprehensive risk assessment tool needs to be developed. In this paper, a risk assessment tool is presented to support the evaluation of intervention strategies in an IUWS over a planning horizon. The IUWS is modelled by “WaterMet2” which is a simulation, …
An Integrated Approach To Simulate Flooding Due To River Dike Breach,
2014
City University of New York (CUNY)
An Integrated Approach To Simulate Flooding Due To River Dike Breach, Yohannis Birhanu Tadesse, Peter Fröhle
International Conference on Hydroinformatics
This paper presents an integrated approach that enables the simultaneous modeling of dike breaching process and flood propagation. The dike breaching process is modelled with a simple breach model implemented into a 2-dimensional hydrodynamic flood model – Telemac2D. Telemac2D models the propagation of the arising flood into the hinterland. The breach model generalizes dike breaching process in two general stages. In the first stage, dike breaching is predominantly vertical with limited lateral breach growth; and in the second stage breach grows only laterally. The breach model requires breach location, breach duration, and length and axis of dike affected by the …
On The Importance Of Remote Sensing Data To Validate A Distributed Dynamic Vegetation Model Applied To A Semi-Arid Basin,
2014
City University of New York (CUNY)
On The Importance Of Remote Sensing Data To Validate A Distributed Dynamic Vegetation Model Applied To A Semi-Arid Basin, Félix Francés, Guiomar Ruiz-Pérez, Marta Pasquato, Chiara Medici, María González-Sanchis, Tarcísio J. G. Fernandes, Antonio Molina, Antonio D. Del Campo
International Conference on Hydroinformatics
Efforts to better understand the components of catchments’ water balance have traditionally been one of the objectives of the hydrological community. Very few hydrological models incorporate vegetation development as state variable. This is beginning to change with the recognition by the hydrological community that biological processes play a key role in catchment’s water balance. In addition, some studies confirm that vegetation density controls most of hydrological processes in semi-arid regions. However, the most of the dynamic vegetation models are too complex to be coupled with hydrological models and they incorporate variables and inputs which are difficult to be estimated across …
Optimal Design Of Network Partitioning For Water Distribution System Protection From Intentional Contamination,
2014
City University of New York (CUNY)
Optimal Design Of Network Partitioning For Water Distribution System Protection From Intentional Contamination, Nardo Armando Di, Michele Di Natale, Dino Musmarra, Giovanni Francesco Santonastaso, Velitchko Tzatchkov, Victor Hugo Alcocer Yamanaka
International Conference on Hydroinformatics
The intentional contamination of water distribution systems represents one of the major risks for citizens, consequently after 11th September 2001 many international organizations have been concerned about it. The availability at low cost of new monitoring and management devices, controlled by a remote system, allows to define different layouts of the water network in a new paradigm of dynamic layouts of water distribution systems in which an important role is played by water network partitioning and sectorization. Recently the advantages of these techniques have been investigated to analyse their application to the problem of water network protection from the contamination. …
A Complex Adaptive Systems Approach To Simulate Interactions Among Water Resources, Decision-Makers, And Consumers And Assess Urban Water Sustainability,
2014
City University of New York (CUNY)
A Complex Adaptive Systems Approach To Simulate Interactions Among Water Resources, Decision-Makers, And Consumers And Assess Urban Water Sustainability, Alireza Mashhadi Ali, M. Ehsan Shafiee, Sankarasubramanian Arumugam, Emily Zechman Berglund
International Conference on Hydroinformatics
The balance between water supply and demand for urban water resources is threatened by population growth, land use changes, and climate change. Interactions among environmental resources, infrastructure, societal norms, and management decisions create complexity and increase the unpredictability of the dynamics of water availability. This research develops a sociotechnical framework to simulate interactions among technical and social systems and assess urban water sustainability. An agent-based model (ABM) is implemented to simulate a community of heterogeneous households as agents. The ABM is coupled with a hydrological watershed model, a water reservoir model, and climate change projections. The increase in the number …
Uncertainty, Flexibility And Design: Real-Options-Based Assessment Of Urban Blue Green Infrastructure,
2014
City University of New York (CUNY)
Uncertainty, Flexibility And Design: Real-Options-Based Assessment Of Urban Blue Green Infrastructure, Vladan Babovic
International Conference on Hydroinformatics
Climate change and rapid urbanization requires a new long-term forward assessment of sustainable urban water management projects. This challenge is further complicated by difficulties of assessing sustainable designs and various design scenarios from an economic standpoint. A conventional approach for economic assessment of urban water management projects, such as Discounted Cash Flow (DCF) analysis, fails to account for uncertainties associated with rainfall intensities, thermal stresses, as well as other uncertainties associated with future changes in technological domains. Such an approach also fails to include the value of flexibility, which enables managers to adapt and reconfigure systems over time as uncertainty …
Vikor Application For Climate Change Adaptation Strategies Under Uncertain Environments,
2014
City University of New York (CUNY)
Vikor Application For Climate Change Adaptation Strategies Under Uncertain Environments, Yeonjoo Kim, Eun-Sung Chung, Minwoo Son
International Conference on Hydroinformatics
This study developed a decision making frame for climate change adaptation strategies under an uncertain environment. We developed a VIKOR-based procedure, providing a compromise solution with the objective weights of multiple climate change scenarios. We chose a watershed in South Korea and established adaptation alternatives of using the effluents of wastewater treatment plants (WWTPs) in potential sub-watersheds to improve the water quantity and quality situations. Under multiple climate scenarios, the environmental and hydrologic responses of treated wastewater (TWW) use were determined with a hydrologic model and the results were used to derive the sustainability scores of TWW reuse. Finally, sustainability …
Stability Criterion For A Flooded Human Body Under Various Ground Slopes,
2014
City University of New York (CUNY)
Stability Criterion For A Flooded Human Body Under Various Ground Slopes, Junqiang Xia, Roger Falconer, Peng Guo, Anchuan Gu
International Conference on Hydroinformatics
Extreme flood events often lead to heavy casualties, with flood risk to humans varying with the flow conditions, the body attributes, and the ground slopes. Therefore, it is important to propose an appropriate stability criterion for a flooded human body under various ground slopes. In this study, a formula for the incipient velocity of a flooded human body at toppling instability was derived, based on a mechanics-based analysis. The effect of body buoyancy and the influence of a non-uniform upstream velocity profile acting on the flooded human body under a sloping ground were considered in the formula derivation. 186 tests …
