Support Of Teaching And Research In Hydroinformatics With R,
2014
City University of New York (CUNY)
Support Of Teaching And Research In Hydroinformatics With R, Milan Cisty
International Conference on Hydroinformatics
R is a free software programming language and environment for statistical computing and graphics. Polls and surveys show that R's popularity has increased substantially in recent years. The objective of this paper is to review features that make R a powerful environment for pre-processing and analyzing data from hydrology and water resources management, and for various other tasks such as hydrological processes modeling, time series analysis, trend analysis, GIS analysis of the watershed, geostatistics, extreme value analysis and various other tasks. This review paper will deal with the possibilities of applying the R programming language in water resources and hydrologic …
Wibasin: Basin Management Through An Integrated Platform,
2014
City University of New York (CUNY)
Wibasin: Basin Management Through An Integrated Platform, Xavier Llort, Rafael Sánchez-Diezma, David Sancho, Alvaro Rodríguez, Marc Berenguer, Daniel Sempere-Torres
International Conference on Hydroinformatics
A key issue in basin and dam management is the correct estimation of accumulated rainfall (observed as well as forecasted) over the catchment (over the characteristic concentration time for critical short-term management, and over longer time periods to anticipate rainfall situations). In this work we present a platform for basin and dam management, called WiBasin, which integrates different sources of precipitation (both observed and forecasted) in a continuous time series of hourly rainfall accumulation fields, having the best precipitation estimation available at each time step. Optimal rainfall estimates used for the past time steps are based on a geostatistical approach …
International Standardization Of Water Information Exchange: Activities Of The Wmo/Ogc Hydrology Domain Working Group,
2014
City University of New York (CUNY)
International Standardization Of Water Information Exchange: Activities Of The Wmo/Ogc Hydrology Domain Working Group, Ulrich Looser, Ilya Zaslavsky, Tony Boston, David Lemon, Lance Mckee, Irina Dornblut
International Conference on Hydroinformatics
Hydrologic information is generated and published by many government, research, commercial and citizen groups around the world. The formats and protocols used to share the data are heterogeneous, with little agreement about semantics of hydrologic measurements, description of hydrologic features, or metadata content. A broad consensus on hydrologic data sharing formats is needed to ensure that the information can be reliably discovered, interpreted, accessed and integrated. This has been the focus of the Hydrology Domain Working Group (Hydro DWG), established in 2009 as a joint working group of the World Meteorological Organisation (WMO) and the Open Geospatial Consortium (OGC). It …
On The Structure Of The Objective Function For A Pressure Sensor Placement Optimizing Methodology Based On Genetic Algorithms Applied To Model-Based Leakage Localization In Distribution Water Networks,
2014
City University of New York (CUNY)
On The Structure Of The Objective Function For A Pressure Sensor Placement Optimizing Methodology Based On Genetic Algorithms Applied To Model-Based Leakage Localization In Distribution Water Networks, Eduard Bonada, Jordi Meseguer, Josep M. Mirats-Tur
International Conference on Hydroinformatics
Real-time monitoring of distribution water networks relies on the deployment of sensors and the availability of their measurements in order to predict the system state and assess its performance. A meaningful application of this methodology is the detection and localization of leaks using model-based approaches. Since the number of sensors is limited because of budget constraints, it is important to place these devices in locations where the effectiveness of the leakage diagnosis is maximized. Finding the best sensor distribution is a global optimization problem defined by an objective function that might depend on different factors. Therefore, deriving the correct structure …
A Stochastic Dynamic Programming Approach To Balancing Wind Intermittency With Hydropower,
2014
City University of New York (CUNY)
A Stochastic Dynamic Programming Approach To Balancing Wind Intermittency With Hydropower, Sue Nee Tan, Christine A. Shoemaker
International Conference on Hydroinformatics
Hydropower is a rapid response energy source and thus a perfect complement to the intermittency of wind power. However, the effect wind energy has on conventional hydropower systems can be felt, especially if the system is subject to several other environmental and non-power use constraints. The goal of this paper is to develop a general method for optimizing short-term hydropower operations of a realistic multireservoir hydropower system in a deregulated market setting when there is a stochastic wind input. The approach used is a modification of stochastic dynamic programming (SDP). The methodology is applied to a representation of multiple projects …
Determination Of Optimal Storage Reservoir Location Considering Regional Importance,
2014
City University of New York (CUNY)
Determination Of Optimal Storage Reservoir Location Considering Regional Importance, Yeon Moon Choo, Sung Min Lim, Jin Gul Joo, Joong Hoon Kim
International Conference on Hydroinformatics
Urban drainage systems are affected by various regional characteristics such as sewer properties, misaligned connections, manhole ground level, and design flood stage at outlet. Therefore, combinatorial characteristic of selecting optimal location of storage facilities from many candidate locations gets even more complicated and becomes a challenging task. The process of selection is conducted using system analyses to address the effects that provide for high efficiency and low damage. This paper focuses on developing an optimal design model for determination of the storage reservoir locations considering regional importance. For cases of urban inundation, importance of flooded region considering the damage needs …
Numerical Simulation Of Pore Fluid Flow And Fine Sediment Infiltration Into The Riverbed,
2014
City University of New York (CUNY)
Numerical Simulation Of Pore Fluid Flow And Fine Sediment Infiltration Into The Riverbed, Tobias Schruff, Florian Schornbaum, Christian Godenschwager, Ulrich Rüde, Roy M. Frings, Holger Schüttrumpf
International Conference on Hydroinformatics
The riverbed embodies an important ecotone for many organisms. It is also an interface between groundwater and surface water, two systems that feature numerous distinctions. The riverbed therefore exhibits many physical and biochemical gradients e.g. flow velocity, temperature, oxygen or nutrient concentration. If the riverbed however becomes clogged through input and deposition of fine sediments, its porosity and permeability decrease leads to reduced interconnectivity between both neighboring systems and eventually reduction of the suitability of the riverbed as a habitat for organisms. Reasons for fine sediment infiltration are high inputs of fine sediments from surface runoff or rainwater retention basins …
Model Predictive Control For Real Time Operation Of Hydraulic Structures For Draining The Operational Area Of The Dutch Water Authority Noorderzijlvest,
2014
City University of New York (CUNY)
Model Predictive Control For Real Time Operation Of Hydraulic Structures For Draining The Operational Area Of The Dutch Water Authority Noorderzijlvest, Jan Talsma, Dirk Schwanenberg, Jan Gooijer, Klaas-Jan Van Heeringen, Bernhard P. J. Becker
International Conference on Hydroinformatics
A pilot project in 2012 for the Dutch regional water authority Noorderzijlvest has shown that the application of Model Predictive Control (MPC) can increase the safety level of the water system during flood events by an anticipatory pre-release of water. Furthermore, energy costs of pumps can be reduced by making tactical use of the water storage and shifting pump activities during normal operating conditions to off-peak hours. In this paper, the extension of the pilot to a real time decision support system is presented. It supports the daily operation of 34 aggregated structures both in wet and dry periods by …
Automated Meter Reading For Water Demand Forecast And Hydraulic Modelling Of The Municipal Water Distribution System In Mikołów, Poland,
2014
City University of New York (CUNY)
Automated Meter Reading For Water Demand Forecast And Hydraulic Modelling Of The Municipal Water Distribution System In Mikołów, Poland, Patryk Wójtowicz, Andrzej Pawlak, Jan Studziński
International Conference on Hydroinformatics
This paper presents preliminary results of a project aimed at utilising automated meter reading (AMR) system for water demand forecasting and hydraulic modelling of Mikołów (Poland) water distribution system. This system will allow for near-real time collection of hydraulic data. Accurate estimation and prediction of the demand patterns of the customers is a crucial element affecting accuracy of hydraulic model. AMR will be used to analyse the behaviour of individual household-based water consumption. Calibration and validation of the model will be realised by combining existing SCADA system and mobile (temporary) measurement points. Total length of the main water distribution system …
Efficient Methods For Optimizing Hydropower Under Uncertainty,
2014
City University of New York (CUNY)
Efficient Methods For Optimizing Hydropower Under Uncertainty, Timothy Michael Magee Jr., Edith A. Zagona, Mitch Clement
International Conference on Hydroinformatics
There are several sources of uncertainty in scheduling hydropower: reservoir inflows, power generation, demand and value, and the value of water remaining in storage at the end of the planning horizon. RiverWare is an object oriented modeling tool widely used for the operations and planning of large and small systems of reservoirs. Typically, short term optimization of hydropower is complicated by the need to meet a wide variety of prioritized non-power constraints and RiverWare is designed to satisfy these constraints to the extent possible. We present four different approaches that use deterministic methods combined with uncertainty models to efficiently optimize …
Impact Assessment Of Organic Contamination On Intake Quality Of Coastal Desalination Plants Using Fate Transport Modeling,
2014
City University of New York (CUNY)
Impact Assessment Of Organic Contamination On Intake Quality Of Coastal Desalination Plants Using Fate Transport Modeling, Walid Elshorbagy
International Conference on Hydroinformatics
Intake water of coastal desalination plants may be subjected to different types of organic pollutants originated from different sources including nearby effluents, loading/unloading of offshore stations, and/or accidental oil spills in the nearby marine water. In United Arab Emirates (UAE), many of such desalination plants are located along one coast hosting desalination plants, refineries and other coastal facilities while many oil tankers are loaded/unloaded from nearby offshore stations. A number of organic pollutants are generated from these sources and can potentially threaten the quality of intake seawater of the nearby desalination plants. This paper assesses the impacts of two selected …
Assessment Of Blackbox Optimization Methods For Efficient Calibration Of Computationally Intensive Hydrological Models,
2014
City University of New York (CUNY)
Assessment Of Blackbox Optimization Methods For Efficient Calibration Of Computationally Intensive Hydrological Models, Pierre-Luc Huot, Annie Poulin, Stéphane Alarie
International Conference on Hydroinformatics
Many studies have shown the effectiveness of blackbox optimization algorithms for the calibration of lumped conceptual hydrological models. Among these algorithms, the « Shuffled Complex Evolution method developed at the University of Arizona » (SCE-UA) is a very popular one. However, when it comes to calibrating distributed and/or physically-based models, computational efficiency becomes an issue. A single simulation with this type of model may take several minutes and the optimization process may require more than thousands of simulations. To alleviate this problem, two recently developed optimization methods, « Dynamically Dimensioned Search » (DDS) and « Nonsmooth Optimization by Mesh Adaptive …
Interactive Web-Based Flood Simulation System As An Education Platform For Hydrological Concepts,
2014
City University of New York (CUNY)
Interactive Web-Based Flood Simulation System As An Education Platform For Hydrological Concepts, Ibrahim Demir
International Conference on Hydroinformatics
Recent developments in web technologies make it easy to manage and visualize large data sets with general public. Novel visualization techniques and dynamic user interfaces allow users to create realistic environments, and interact with data to gain insight from simulations and environmental observations. The floodplain simulation system is a web-based 3D interactive flood simulation environment to create real world flooding scenarios. The simulation systems provides a visually striking platform with realistic terrain information, and water simulation. Students can create and modify predefined scenarios, control environmental parameters, and evaluate flood mitigation techniques. The web-based simulation system provides an environment for students …
Short-Term Optimization Model With Esp Forecasts For Columbia Hydropower System With Optimized Multi-Turbine Powerhouses,
2014
City University of New York (CUNY)
Short-Term Optimization Model With Esp Forecasts For Columbia Hydropower System With Optimized Multi-Turbine Powerhouses, Jery R. Stedinger, Sue Nee Tan, Christine A. Shoemaker, Jonathan R. Lamontagne, Steven B. Barton
International Conference on Hydroinformatics
Hydroelectric generation is the major source of electric energy in the Pacific Northwestern region of the United States, and efficient operation of that system while meeting environmental constraints and reserve capacity demands is an important economic, environmental, and social issue. This paper describes efforts to develop a new stochastic short-term scheduling model (with perhaps a 3-week planning horizon) for the ten major reservoirs operated by the federal Bonneville Power Administration (BPA) on the Columbia and Snake River systems. The analysis incorporates time-delays (up to 24 hours in a model with time steps increasing from 6 hours initially perhaps to 24 …
The Potential Of Kohonen Method For Classifying Rivers Focused On Regional Environmental Flow Determination With Eloha,
2014
City University of New York (CUNY)
The Potential Of Kohonen Method For Classifying Rivers Focused On Regional Environmental Flow Determination With Eloha, Federico Gonzalez Cuellar, Nelson Obregon Neira
International Conference on Hydroinformatics
This article highlights the potential benefits that the Kohonen method has for the classification of rivers with similar characteristics by determining regional ecological flows using the ELOHA (Ecological Limits of Hydrologic Alteration) methodology. Currently, there are many methodologies for the classification of rivers, however none of them include the characteristics found in Kohonen method such as (i) providing the number of groups that actually underlie the information presented, (ii) used to make variable importance analysis, (iii) which in any case can display two-dimensional classification process, and (iv) that regardless of the parameters used in the model the clustering structure remains. …
A Comparative Study Of Accuracy And Performance Between A Fully 2d Gpu Based And A 1d-2d Coupled Numerical Model In A Real River,
2014
City University of New York (CUNY)
A Comparative Study Of Accuracy And Performance Between A Fully 2d Gpu Based And A 1d-2d Coupled Numerical Model In A Real River, Mario Morales-Hernández, Asier Lacasta, Javier Murillo, Pilar Brufau, Pilar García-Navarro
International Conference on Hydroinformatics
Hydraulic simulation is becoming a very widely used tool to provide information about the duration, the extension and the magnitude of a flooding episode. In the last decade, the advances in the numerical schemes, connected to the evolution experimented in the power of computers have allowed to aim for maximum accuracy in the results instead of working with simplified models. In particular, two main implementations have been extensively developed in the recent years: 1D-2D coupled numerical models and fully 2D models under GPU technologies. These strategies allow to simulate a wide range of applications over large domains and time scale …
Delivering And Evaluating Multiple Flood Risk Benefits In Blue-Green Cities,
2014
City University of New York (CUNY)
Delivering And Evaluating Multiple Flood Risk Benefits In Blue-Green Cities, Nigel G. Wright, Colin Thorne
International Conference on Hydroinformatics
In the UK a research consortium has been funded to develop new strategies for managing urban flood risk as part of wider, integrated urban planning intended to achieve environmental enhancement and urban renewal in which multiple benefits of Blue-Green Cities are rigorously evaluated and understood. This approach is very much part of the resilience paradigm and seeks to develop the socio-technical tools required to fully evaluate resilience options as part of a wider system. The Consortium’s objectives are to: Put competent authorities, businesses and communities at the centre of the research by establishing feedback pathways between them and the FRM …
Delaware Reservoirs’ Drought Risk Assessment: A Paleo View,
2014
City University of New York (CUNY)
Delaware Reservoirs’ Drought Risk Assessment: A Paleo View, Naresh Devineni, Gokce Ceylan
International Conference on Hydroinformatics
The Delaware River provides half of New York City's drinking water, is a habitat for wild trout, American shad and the federally endangered dwarf wedge mussel. It has suffered four 100‐year floods in the last seven years. A drought during the 1960s stands as a warning of the potential vulnerability of the New York City area to severe water shortages if a similar drought were to recur. The water releases from three New York City dams on the Delaware River's headwaters impact not only the reliability of the city’s water supply, but also the potential impact of floods, and the …
A Simulation Based Optimal Control System For Water Resources,
2014
City University of New York (CUNY)
A Simulation Based Optimal Control System For Water Resources, Asier Lacasta, Mario Morales-Hernández, Pilar Brufau, Pilar García-Navarro
International Conference on Hydroinformatics
Nowadays, the increasing demand of water resources has become one of the most relevant issues when water supply must be guaranteed as in the case of irrigation comunities. It becomes difficult to provide the predictive optimal behavior of regulation structures when the regime of the flow is changing in time and, moreover, when this regulation modifies the hydraulic conditions of the structure. One of the most widely used solution for control is PID. The disadvantages of PID control are the difficulties in the presence of non-linearities as well as the PID parameters tuning. Taking into account previous works about sluice …
Numerical Simulations And Laboratory Measurements In Hydraulic Jumps,
2014
City University of New York (CUNY)
Numerical Simulations And Laboratory Measurements In Hydraulic Jumps, Luis G. Castillo, José M. Carrillo, Juan T. García, Antonio Vigueras-Rodríguez
International Conference on Hydroinformatics
Hydraulic jump is one of the most extended and effective mechanism for hydraulic energy dissipation. Usually, hydraulic jump characteristics have been studied through physical models. Nowadays, computational fluid dynamics (CFD) are an important tool that can help to analyze and to understand complex phenomena that involve high turbulence and air entrainment cases. Free and submerged hydraulic jumps with Froude numbers from 2.9 to 5.5 are studied in a rectangular channel downstream a sluice gate. Velocity measurements with different flow rates are carried out by using Acoustic Doppler Velocimeter (ADV) and Particle Image Velocimeter (PIV) instrumentations. In this paper, laboratory measurements …
