Modelling And Validation Of The Santa Catarina Island Bays Hydrodynamics Based On Astronomic Tides And Measured Tides,
2014
City University of New York (CUNY)
Modelling And Validation Of The Santa Catarina Island Bays Hydrodynamics Based On Astronomic Tides And Measured Tides, Luis Hamilton Pospissil Garbossa, Argeu Vanz, Luis Daniel Fachada Fernandes, Robson Ventura De Souza, Luiz Fernando Vianna, Guilherme Sabino Rupp
International Conference on Hydroinformatics
Santa Catarina Island bays (SCI bays) has a great economic and social importance in the region. With more than 700.000 habitants in its surroundings, besides touristic and fishery activities, it represents approximately 70% of the Brazilian bivalve shellfish production. In order to understand processes controlling the water quality and food availability, relevant for the shellfish production, it is unquestionably important to understand the main hydrodynamics patterns of SCI Bay. Thus, a hydrodynamic assessment study of the SCI bays was carried out using the numerical model MOHID. The model was implemented using bathymetric information obtained from Brazilian nautical charts, two tide …
A Novel Nested Dynamic Programming (Ndp) Algorithm For Multipurpose Reservoir Optimization,
2014
City University of New York (CUNY)
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 …
Development Of A Cloud Computing Application For Water Resources Modelling And Optimization Based On Open Source Software,
2014
City University of New York (CUNY)
Development Of A Cloud Computing Application For Water Resources Modelling And Optimization Based On Open Source Software, Blagoj Delipetrev, Andreja Jonoski, Dimitri P. Solomatine
International Conference on Hydroinformatics
Cloud computing is the latest advancement in Information and Communication Technology (ICT) that provides computing as a service or delivers computation, software, data access, storage service without end-user knowledge of the physical location and system configuration. Cloud computing, service oriented architecture and web geographic information systems are new technologies for development of the cloud computing application for water resources modelling and optimization. The cloud application is deployed and tested in a distributed computer environment running on three virtual machines (VMs). The cloud application has five web services for: (1) spatial data infrastructure – 1 (SDI), (2) SDI – 2, (3) …
A Particle Dispersion Model For Analysis Of Two-Dimensional Mixing In Open Channels,
2014
City University of New York (CUNY)
A Particle Dispersion Model For Analysis Of Two-Dimensional Mixing In Open Channels, Il Won Seo, In Hwan Park
International Conference on Hydroinformatics
Pollutant mixing in natural rivers is analyzed by using the two-dimensional depth-averaged advection-dispersion model (2D ADE) for rapid completion of the vertical mixing. The dispersion term in the 2D ADE follows Taylor’s assumption (Taylor, 1954; Fischer et al., 1979) which can be applied in the Taylor period. However, most open channel flow has long initial period which makes the skewed concentration distribution due to the unbalance between the shear flow advection and the vertical mixing (Chatwin, 1970). Therefore, the non-Fickian dispersion model is necessary to compensate the limitations of the 2D ADE model. In this research, the two-dimensional particle dispersion …
Separation Of Soil Evaporation And Vegetation Transpiration By Modis Data For Central And Northern China,
2014
City University of New York (CUNY)
Separation Of Soil Evaporation And Vegetation Transpiration By Modis Data For Central And Northern China, Tingting Li, Jinhui Jeanne Huang
International Conference on Hydroinformatics
Evapotranspiration(ET) plays a crucial role in the hydrologic system. To estimate evapotranspiration quantitatively in a large scale, remote sensing data has been used in a number of models and shows its applicability in the estimation of evapotranspiration. In this paper, evapotranspiration for central and northern China was derived from MODIS data. In arid and semi-arid regions, soil evaporation can be considered as the minimum water requirement for bare area, while evapotranspiration can be considered as the minimum water demand for the area covered by vegetation. Hence the separation of soil evaporation and vegetation transpiration is valuable for efficient water resources …
Parameterization Of Turbulence Models Using 3dvar Data Assimilation,
2014
City University of New York (CUNY)
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 Serious Gaming Approach For Serious Stakeholder Participation,
2014
City University of New York (CUNY)
A Serious Gaming Approach For Serious Stakeholder Participation, Chengzi Chew, Anna Zabel, Gareth James Lloyd, Indika Gunawardana, Bertram Monninkhoff
International Conference on Hydroinformatics
Serious games are a category of games which are designed for a specific purpose other than for pure entertainment. It is not a new concept but serious games using real data, coupled with real time modelling and combining model results with social and economic factors opens up a new paradigm for active stakeholder participation. DHI and UNEP-DHI Centre initiated a project called Aqua Republica where a virtual world is developed which allows participants to develop a river basin and visualise the consequences of their decisions. The aim of this project is to raise awareness of the interconnectivity of water and …
Optimal Rehabilitation Strategy In Water Distribution Systems Considering Reduction In Greenhouse Gas Emissions,
2014
City University of New York (CUNY)
Optimal Rehabilitation Strategy In Water Distribution Systems Considering Reduction In Greenhouse Gas Emissions, Farshid Rahmani, Abdollah Ardeshir, Kourosh Behzadian, Fatemeh Jalilsani
International Conference on Hydroinformatics
Most of water distribution systems (WDS) need rehabilitation due to aging infrastructure leading to decreasing capacity, increasing leakage and consequently low performance of the WDS. However an appropriate strategy including location and time of pipeline rehabilitation in a WDS with respect to a limited budget is the main challenge which has been addressed frequently by researchers and practitioners. On the other hand, selection of appropriate rehabilitation technique and material types is another main issue which has yet to address properly. The latter can affect the environmental impacts of a rehabilitation strategy meeting the challenges of global warming mitigation and consequent …
Pcswmm Real Time Flood Forecasting – Toronto, Canada,
2014
City University of New York (CUNY)
Pcswmm Real Time Flood Forecasting – Toronto, Canada, Mark Randall, Rob James, William James, Karen Finney, Michael Heralall
International Conference on Hydroinformatics
Flooding in urban areas can cause significant property damage and human injury. Recent extreme precipitation events in the Toronto area have highlighted the need for enhanced warning systems to inform decision making prior to a storm’s arrival. To improve the accuracy and lead time of flood forecasting, Computational Hydraulics International and the Toronto and Region Conservation Authority have developed a high resolution, deterministic, physically-based remote-sensing real-time flood forecasting and web-based decision support system, and applied it to the Don River and Etobicoke Creek watersheds. Using PCSWMM Real-Time, NEXRAD radar data, US EPA SWMM5, HTML5 and Google Maps the system forecasts …
Reconstruction Of Paleo-Hydrologic Data For Vulnerability Assessment Of Water Resources Systems,
2014
City University of New York (CUNY)
Reconstruction Of Paleo-Hydrologic Data For Vulnerability Assessment Of Water Resources Systems, Saman Razavi, Amin Elshorbagy, Howard Wheater, David Sauchyn
International Conference on Hydroinformatics
Tree-ring chronologies are a rich source of information of past climate-driven non-stationarities in hydrologic variables. They are typically directly related to available water in respective years, thereby providing a basis for paleo-hydrology reconstruction. This study investigates the time series of tree-ring chronologies, with the objective of identifying the spatiotemporal patterns and extents of non-stationarities, which are essentially representations of past “climate changes”. This study also generates ensembles of moving-average streamflow time series for the centuries prior to the period of observational record. The major headwater tributaries of the Saskatchewan River basin (SaskRB), the main source of surface water in the …
A Harmonized Vocabulary For Water Quality,
2014
City University of New York (CUNY)
A Harmonized Vocabulary For Water Quality, Simon J.D. Cox, Bruce A. Simons, Jonathan Yu
International Conference on Hydroinformatics
Interoperability of water quality data depends on the use of common models, schemas and vocabularies. However, terms are usually collected during different activities and projects in isolation of one another, resulting in vocabularies that have the same scope being represented with different terms, using different formats and formalisms, and published in various access methods. Significantly, most water quality vocabularies conflate multiple concepts in a single term, e.g. quantity kind, units of measure, substance or taxon, medium and procedure. This bundles information associated with separate elements from the OGC Observations and Measurements (O&M) model into a single slot. We have developed …
Harmonization Of Vocabularies For Water Data,
2014
City University of New York (CUNY)
Harmonization Of Vocabularies For Water Data, Simon J.D. Cox, Jonathan Yu, Bruce A. Simons
International Conference on Hydroinformatics
Observational data encodes values of properties associated with a feature of interest, estimated by a specified procedure. For water the properties are physical parameters like level, volume, flow and pressure, and concentrations and counts of chemicals, substances and organisms. Water property vocabularies have been assembled at project, agency and jurisdictional level. Organizations such as EPA, USGS, CEH, GA and BoM maintain vocabularies for internal use, and may make them available externally as text files. BODC and MMI have harvested many water vocabularies alongside others of interest in their domain, formalized the content using SKOS, and published them through web interfaces. …
A Web-Based Hydroinformatic Platform For Water Quality Modelling And Simulation In A River Basin,
2014
City University of New York (CUNY)
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. …
Web-Based Engine For Discovery Of Observations Using Landscape Units,
2014
City University of New York (CUNY)
Web-Based Engine For Discovery Of Observations Using Landscape Units, Haowen Xu, Abbas Ali Amir, Marian Muste
International Conference on Hydroinformatics
Investigations of natural resources processes realted to the water cycle are best studied using a commensurate landscape unit for the spatial extent of the process. Consequently, the capability to efficiently delineate the watershed extent along with the main hydrological characteristics and behavior of the river network and its drainage area is essential. The watershed search engine discussed in the present paper is designed to identify various observations acquired in the upstream drainage area of the watershed from a point specified by the user. The point can be selected on or outside the stream network using a web mapping interface. The …
River Water Quality Modelling In Developing A Catchment Water Safety Plan,
2014
City University of New York (CUNY)
River Water Quality Modelling In Developing A Catchment Water Safety Plan, Jose Vieira, Jose Pinho
International Conference on Hydroinformatics
The primary aim of a catchment water safety plan is to reduce risks within the catchment to protect the quality of drinking water sources at the point of abstraction. Even where effective arrangements for catchment management and control have been implemented, unexpected deterioration in raw water quality can pose a risk to treated drinking water quality. Thus potential sources of pollution impacting the abstraction point should be identified and monitored. An important part of any catchment management strategy includes implementation of raw water monitoring programmes, targeted at the most likely microbiological challenges to water treatment. When combined with good monitoring …
Fews-Waterways For Economically And Efficiently Navigating On Inland Waterways.,
2014
City University of New York (CUNY)
Fews-Waterways For Economically And Efficiently Navigating On Inland Waterways., Juzer F. Dhondia, Rolien Van Der Mark, Meeuwis Van Wirdum, R Smits
International Conference on Hydroinformatics
This paper describes the use of Delft-FEWS as part of a tool for navigating on Inland Waterways economically and efficiently. Delft-FEWS, as developed by Deltares, is an operational real time forecasting system which links data and models in real time. FEWS-Waterways forecasts water depth, , flow velocity, air clearance based on measured and forecasted hydrological and metrological data and current state of the waterway system. This feature of Delft-FEWS is used in an economy planner giving advice to ship masters with respect to: maximal cargo volume, minimum fuel consumption and the optimal ship speed in order to arrive in time …
Real-Time Reservoir Operation For Drought Management Considering Ensemble Streamflow Predictions Derived From Operational Forecasts Of Precipitation In Japan,
2014
City University of New York (CUNY)
Real-Time Reservoir Operation For Drought Management Considering Ensemble Streamflow Predictions Derived From Operational Forecasts Of Precipitation In Japan, Daisuke Nohara, Tomoharu Hori
International Conference on Hydroinformatics
Ensemble hydrological predictions are considered to be useful for robust reservoir operation as they include multiple possible hydrological scenarios in the future as well as dispersion of the predictions, from which the degree of prediction uncertainty can be estimated. Although operational ensemble hydrological predictions have been available in many regions, they have not yet been widely used in the actual reservoir management due to the difficulty in the handling such complex information. In order to facilitate effective utilization of ensemble hydrological predictions in the actual reservoir management, a real-time reservoir operation method for drought management is developed considering operational ensemble …
Remote Sensing Of Total Water Storage Variability During Extreme Heat Waves,
2014
City University of New York (CUNY)
Remote Sensing Of Total Water Storage Variability During Extreme Heat Waves, José Agustín Breña-Naranjo, Adrián Pedrozo-Acuña
International Conference on Hydroinformatics
Droughts and heat waves are a major hazard for food & water security, economic development, and human & ecosystem health, among others. Over the last decade, short-term but exceptional heat waves have been observed across different regions of the world, with several locations experiencing all-time maximum temperature records. While many studies have suggested that the extreme intensity of such recent events can be attributed to a changing climate, little attention has been given to the impacts on the terrestrial water balance. This work analyzes the sensitivity of total water storage to extreme heat waves since 2003 in Europe (2003), Russia, …
A Spatial-Temporal Downscaling Approach To Construction Of Rainfall Intensity-Duration-Frequency Relations In The Context Of Climate Change,
2014
City University of New York (CUNY)
A Spatial-Temporal Downscaling Approach To Construction Of Rainfall Intensity-Duration-Frequency Relations In The Context Of Climate Change, Van-Thanh-Van Nguyen, Myeong-Ho Yeo
International Conference on Hydroinformatics
This paper proposes a spatial-temporal downscaling approach to construction of the intensity-duration-frequency (IDF) relations at a local site in the context of climate change and variability. More specifically, the proposed approach is based on a combination of a spatial downscaling method to link large-scale climate variables given by General Circulation Model (GCM) simulations with daily extreme precipitations at a site and a temporal downscaling procedure to describe the relationships between daily and sub-daily extreme precipitations based on the scaling General Extreme Value (GEV) distribution. The feasibility and accuracy of the suggested method were assessed using rainfall data available at eight …
Application Of 1d And 2d Numerical Models For Assessing And Visualizing Effectiveness Of Natural Flood Management (Nfm) Measures,
2014
City University of New York (CUNY)
Application Of 1d And 2d Numerical Models For Assessing And Visualizing Effectiveness Of Natural Flood Management (Nfm) Measures, Sohan Ghimire, Mark Wilkinson, Gillian Donaldson-Selby
International Conference on Hydroinformatics
Natural Flood Management (NFM) techniques that include alteration, restoration or use of landscape features, have emerged as a novel way of reducing flood risk in Scotland. NFM aims to reduce the peak flood downstreamincreasing the time available to prepare for flood. Water storage ponds are very effective for this purpose. The aim of the paper is to present findings of a modelling approach to floodinundation and risk assessment, and its application for assessing the effectiveness of wetland storage ponds as NFM measures. The study was undertaken in a rural catchment (Tarland Burn, area ~74 km2) located in Aberdeenshire, north-east Scotland. …
