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Articles 3121 - 3150 of 8193

Full-Text Articles in Water Resource Management

Numerical Simulation Of A Three Blade Marine Current Turbine, Xin Bai, Eldad J. Avital, Ante Munjiza, John J.R. Williams Aug 2014

Numerical Simulation Of A Three Blade Marine Current Turbine, Xin Bai, Eldad J. Avital, Ante Munjiza, John J.R. Williams

International Conference on Hydroinformatics

Renewable energy usually refers to those natural sources of energy which are possible to use without diminishing the resource and the current European target is to source 20% of its energy from renewable sources by 2020. The marine current turbine (MCT) is an exciting proposition for the extraction of renewable tidal and marine current power. It is gaining momentum as a viable technology and is currently the subject of much attention and research. However, the numerical predication of the power performance of a marine current turbine under a free surface is difficult due to its complex geometry, fluid-structural interactions and …

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Evaluating Alternative Water Allocation Policies Among Competing Users In Bow River Basin, Alberta, Canada, Wei Xu, Nader Khoshroo, Henning Bjornlund Aug 2014

Evaluating Alternative Water Allocation Policies Among Competing Users In Bow River Basin, Alberta, Canada, Wei Xu, Nader Khoshroo, Henning Bjornlund

International Conference on Hydroinformatics

Demand for water from rivers and aquifers for consumptive use has grown greatly due to population and economic growth and changing lifestyle and dietary habits. Consequently, aquatic ecosystems, especially in semi-arid and arid regions across the world, suffer adverse environmental impacts of over-extraction. Historically, Alberta’s water allocation system has been based on the first-in-time-first-in-right (FITFIR) system, granting the preference to the licensees based on the seniority of their licenses. In recent years, scientists, policy makers, and water users have raised questions whether FITFIR will continue to be the most appropriate allocation system to manage increasing scarce water resources in Alberta. …

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Optimizing Maritime Terminal Infrastructure Subject To Uncertainty, Michael John Francis Rustell, Aurora Orsini, Soon-Thiam Khu, Yaochu Jin, Ben Gouldby Aug 2014

Optimizing Maritime Terminal Infrastructure Subject To Uncertainty, Michael John Francis Rustell, Aurora Orsini, Soon-Thiam Khu, Yaochu Jin, Ben Gouldby

International Conference on Hydroinformatics

This paper describes a hydroinformatic model for generating a Pareto set of LNG terminal layouts that are subject to uncertainty using a multi-objective genetic algorithm. The NSGAII is used to select parameters that propagate through a bespoke LNG terminal design algorithm which includes a Monte Carlo simulator to estimate the uncertainty in each concept. This allows the trade-off between cost and risk to be explored at the earliest stage of design. The results of a case study indicate that nearshore terminals typically have lower capital costs but higher maintenance costs and more uncertainty. The paper concludes that in the example …

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Effects Of 2d And 1d Modeling On Mapping Aquatic Habitat Quality, Rohan Benjankar, Daniele Tonina, Jim Mckean Aug 2014

Effects Of 2d And 1d Modeling On Mapping Aquatic Habitat Quality, Rohan Benjankar, Daniele Tonina, Jim Mckean

International Conference on Hydroinformatics

The distribution of aquatic habitat at the organism scale, i.e. 1 by 1m or smaller is typically predicted from local physical characteristics of stream flow, bed, banks and sediment characteristics and a set of biological preference curves. The flow properties are typically predicted with numerical modeling whereas stream bed and bank characteristics defined from interpolated DEM generated by topographical surveys and field observations. Information on the effects of flow properties and streambed morphology due to numerical modeling dimensionality on aquatic habitat modeling is limited. Two-dimensional (2D) modeling is becoming the most popular method to map micro-habitat but its application is …

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Swatshare – A Web-Portal For Hydrology Research And Education Using Soil Water And Assessment Tool, Mohammad Adnan Rajib, Venkatesh Merwade, I Luk Kim, Shandian Zhe, Lan Zhao, Carol Song Aug 2014

Swatshare – A Web-Portal For Hydrology Research And Education Using Soil Water And Assessment Tool, Mohammad Adnan Rajib, Venkatesh Merwade, I Luk Kim, Shandian Zhe, Lan Zhao, Carol Song

International Conference on Hydroinformatics

Many hydrologic modelers around the world use Soil Water Assessment and Tool (SWAT) to simulate hydrologic processes, water quality loadings and testing agricultural management scenarios. Once these tasks are complete including publication of results, the models generally are not published or made available to the public for further use and improvement. Although publication or sharing of models is not required for journal publications, sharing of models may open doors for new collaborations, and avoids duplication of efforts if other researchers are interested in simulating a particular watershed for which a model already exists. For researchers, who are interested in sharing …

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The Hydro-Modeling Platform (Hydromp) - Enabling Cloud-Based Environmental Modeling Using Software-As-A-Service (Saas) Cloud Computing, Ronghua Liu, Jiahua Wei, Haiyan Liu Aug 2014

The Hydro-Modeling Platform (Hydromp) - Enabling Cloud-Based Environmental Modeling Using Software-As-A-Service (Saas) Cloud Computing, Ronghua Liu, Jiahua Wei, Haiyan Liu

International Conference on Hydroinformatics

Hydro-model has become important tool for water resources management, with higher demand in simulation precision and speed of decision support, models designed for sectoral application becoming outmoded, and original mode that massive schemes are run sequentially cannot meet the real-time requirements, especially with the computation increase by finer discretization granularity and broader research range. Water management organizations are increasingly looking for new generation tools that allow integration across domains, and can provide extensible computing resources to assist their decision making processes. In response to this need, a hydro-modeling platform(HydroMP) based on cloud computing is designed and implemented, which can deployed …

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Development Of Real-Time Drinking Water Distribution Systems (Dwds) Modeling Technology Using The Epanet Extended Period Simulation (Eps) Modeling Toolkit, Sudhir Kshirsagar, Walter Grayman, Ben Chenevey, Aditi Shetti, Saurabh Gupta, Benjamin Bedinghaus, Steve Mylroie Aug 2014

Development Of Real-Time Drinking Water Distribution Systems (Dwds) Modeling Technology Using The Epanet Extended Period Simulation (Eps) Modeling Toolkit, Sudhir Kshirsagar, Walter Grayman, Ben Chenevey, Aditi Shetti, Saurabh Gupta, Benjamin Bedinghaus, Steve Mylroie

International Conference on Hydroinformatics

Real-time hydraulic and water quality modeling involves the modification of the EPS network model every few minutes to reflect the SCADA data, and this paper shares how this type of real-time modeling framework, HydroTrek, was built on top of the EPS foundation provided by the EPANET toolkit. The real-life applications of HydroTrek posed some interesting modeling challenges when the hydraulic time-step was reduced to match the SCADA time-step of one to five minutes. For example, a physical pump usually does not instantaneously, but a model pump does. In a sensitive network, that can mean a significant mismatch between the SCADA …

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Modularity Index For The Segmentation Of Water Distribution Networks, Orazio Giustolisi, Luca Ridolfi Aug 2014

Modularity Index For The Segmentation Of Water Distribution Networks, Orazio Giustolisi, Luca Ridolfi

International Conference on Hydroinformatics

The search for suitable segmentations is a challenging issue for analysis, planning and management of water distribution networks (WDNs). In fact complex and large size hydraulic systems require the division into modules in order to simplify the analysis and the management tasks. In complex network theory, modularity index was proposed as a measure of the strength of the network division into communities. Nevertheless, modularity index needs to be revised considering the specificity of the hydraulic systems. Accordingly, the classic modularity index is firstly presented and, then, tailored and modified for WDNs. Furthermore, a multi-objective strategy for optimal segmentation is presented. …

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On Real-Time Monitoring And Control For Efficient Management Of Drinking Water Networks: Barcelona Case Study, Gabriela Cembrano, Vicenç Puig, Carlos Ocampo-Martinez, Joseba Quevedo, Josep M. Mirats, Jordi Meseguer, Ramon Ariño, Silvia López Aug 2014

On Real-Time Monitoring And Control For Efficient Management Of Drinking Water Networks: Barcelona Case Study, Gabriela Cembrano, Vicenç Puig, Carlos Ocampo-Martinez, Joseba Quevedo, Josep M. Mirats, Jordi Meseguer, Ramon Ariño, Silvia López

International Conference on Hydroinformatics

Drinking water utilities in urban areas are focused on finding smart solutions facing new challenges in their real-time operation because of limited water resources, intensive energy requirements, a growing population, a costly and ageing infrastructure, increasingly stringent regulations, and increased attention towards the environmental impact of water use. Such challenges force water managers to monitor and control not only water supply and distribution, but also consumer demand. This paper presents and discusses novel methodologies and procedures towards an integrated water resource management system based on advanced ICT technologies of automation and telecommunications for largely improving the efficiency of drinking water …

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Graphic User Interface To Preprocess Landsat Tm, Etm+ And Oli Images For Hydrological Applications, Rafael Pimentel, Javier Herrero, María José Polo Aug 2014

Graphic User Interface To Preprocess Landsat Tm, Etm+ And Oli Images For Hydrological Applications, Rafael Pimentel, Javier Herrero, María José Polo

International Conference on Hydroinformatics

Remote sensing techniques are powerful tools for the validation and data assimilation of GIS-based calculations of physical and distributed hydrological models. The high spatial resolution of Landsat TM, ETM+ and OLI, make this the most adequate satellite images for the study of hydrological processes in Mediterranean regions. Several levels of preprocessing are required to obtain validated reflectance values from these images. Generally, these steps include radiometric calibrations and an atmospheric correction. However, over complex terrain and for specific land covers such as snow, certain problems related to radiometric saturation and shadow effects must also be taken into account. This work …

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Extension And Testing Of A 2d Hydrodynamic Model For Direct Rainfall Runoff Simulation, Robert Klar, Stefan Achleitner, Simon Lumassegger, Markus Aufleger, Michael Hofer Aug 2014

Extension And Testing Of A 2d Hydrodynamic Model For Direct Rainfall Runoff Simulation, Robert Klar, Stefan Achleitner, Simon Lumassegger, Markus Aufleger, Michael Hofer

International Conference on Hydroinformatics

While the simulation of flood risks originating from the overtopping of river banks is well covered within continuously evaluated programs to improve flood protection measures, flash flooding is not. Flash floods are triggered by short, local thunderstorm cells with high precipitation intensities. Small catchments have short response times and flow paths and convective thunder cells may result in potential flooding of endangered settlements. Assessing local flooding and pathways of flood requires a detailed hydraulic simulation of the surface runoff. Hydrological models usually do not incorporate surface runoff at this detailedness but rather empirical equations are applied for runoff detention. In …

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An Optimization Model For Prioritizing Sewerage Maintenance Scheduling, Juan David Torres Turriago, Juan Pablo Rodriguez, Juan David Palacio Aug 2014

An Optimization Model For Prioritizing Sewerage Maintenance Scheduling, Juan David Torres Turriago, Juan Pablo Rodriguez, Juan David Palacio

International Conference on Hydroinformatics

Water utility companies, responsible for providing water supply and sewerage services to the urban population, are constantly seeking to improve their service.In the case of sewer systems, effective scheduling of preventive maintenance of urban water infrastructure has been identified as an important activity in order to reduce costs and protect the integrity of citizens and the surrounding, both built and natural, environments. Consequently, with particular focus on Bogotá (Colombia), we developed an optimization model that generates a preventive maintenance plan on a set of zones withinthe city. These zones have in common a high failure probability over a defined time …

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Pressure Fluctuations On The Slabs Of Stilling Basins Under Hydraulic Jump, Abdollah Sobani Aug 2014

Pressure Fluctuations On The Slabs Of Stilling Basins Under Hydraulic Jump, Abdollah Sobani

International Conference on Hydroinformatics

Although in the design of hydraulic structures generally the average characteristics is considered, but according to studies, use of this approach for the design of structures such as spillways and the stilling basins which are under the influence of turbulent flows and in other hand, the difference between the moment values of the parameters of the medium values, are impressive, is not recommended. Due to the enormous and costly construction and operating costs of such buildings, the study of fluctuation characteristics of the turbulent flow and their role in estimating the maximum tensile force is necessary and inevitable.

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Catchment-Scale Water Quality Monitoring, Control And Management Framework Using Collaborative Wireless Sensor Networks, Huma Zia, Nick Harris, Geoff Merrett Aug 2014

Catchment-Scale Water Quality Monitoring, Control And Management Framework Using Collaborative Wireless Sensor Networks, Huma Zia, Nick Harris, Geoff Merrett

International Conference on Hydroinformatics

Improving water quality is a global concern, with agricultural practices being the major contributors to reduced water quality. The reuse of nutrient-rich drainage water can be a valuable strategy to maximise water resources and gain economic-environmental benefits. Transmitting event information across a catchment, as the event occurs upstream, allows prediction of the outflow dynamics of the expected discharges downstream. Here, we propose a framework architecture which utilises increasingly common local farm-scale networks and other water-quality monitoring networks across a catchment, adding provision for collaborative information sharing. The key part is that individual networks learn their environment, predicting the impact of …

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Urbanwater And Waterp: Decision Support Systems For Efficient And Integrated Water Resources Management, David Sancho, Alvaro Rodríguez, Rafael Sánchez-Diezma, Xavier Llort, Gabriel Anzaldi, Edgar Rubión, Aitor Corchero, Albert Rodríguez Aug 2014

Urbanwater And Waterp: Decision Support Systems For Efficient And Integrated Water Resources Management, David Sancho, Alvaro Rodríguez, Rafael Sánchez-Diezma, Xavier Llort, Gabriel Anzaldi, Edgar Rubión, Aitor Corchero, Albert Rodríguez

International Conference on Hydroinformatics

In this work we present UrbanWater and WatERP, two EU-FP7 projects with the common objective of designing and developing innovative ICT solutions to integrate real-time knowledge on water demand and supply across water distribution networks. On one hand, WatERP proposes to develop a web-based Open Management Platform (OMP) supported by real-time knowledge on water supply and demand, enabling the entire water distribution system to be viewed in an integrated and customized way. The OMP provides inferred information regarding water supplies, flows, water consumption patterns, water losses, distribution efficiency, and water supply and demand forecasts to the user. This information is …

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Integration Of Water Supply Distribution Systems By Using Interoperable Standards To Make Effective Decisions, Gabriel Anzaldi, Wenyan Wu, Andreas Abecker, Edgar Rubión, Aitor Corchero, Ambreen Hussain, Michael Quenzer Aug 2014

Integration Of Water Supply Distribution Systems By Using Interoperable Standards To Make Effective Decisions, Gabriel Anzaldi, Wenyan Wu, Andreas Abecker, Edgar Rubión, Aitor Corchero, Ambreen Hussain, Michael Quenzer

International Conference on Hydroinformatics

This paper aims at presenting current standards used and their implementation to integrate different decision making tools spread throughout the Water Supply Distribution Chain. Nowadays in Europe the water supply distribution managers use many tools to perform their decisional processes and multiple data sources to aid in decision making which are totally unconnected and use different communication languages. The data and protocols heterogeneity provides a lack of fluidity in communications between the tools, and in many cases non-existent. An architectural proposal, which uses hydrologic standards, with the aim to offer a common way to interconnect existing tools and data to …

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Causal Graph Discovery For Hydrological Time Series Knowledge Discovery, Piraporn Jangyodsuk, Dong-Jun Seo, Jean Gao Aug 2014

Causal Graph Discovery For Hydrological Time Series Knowledge Discovery, Piraporn Jangyodsuk, Dong-Jun Seo, Jean Gao

International Conference on Hydroinformatics

Causal inference or causal relationship discovery is an important task in hydrological study to explore the causes of abnormal hydrology phenomena such as drought and flood, which will help improving our prediction and response ability to natural disasters. Different from generic causality study where causalrelation discovery is sufficient, for extreme hydrological situation prediction and modeling, we need not only to construct a causal graph to reveal the contributing factors, but also to provide the lead time of each cause to its effect. Lead time is the time difference between the occurrence of lead and effect. Though causal inference or causal …

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Verification Of The Standard Vector Data Model For Interoperability Of River-Geospatial Information, Hyungjin Shin, Hyosok Chae, Euiho Hwang Aug 2014

Verification Of The Standard Vector Data Model For Interoperability Of River-Geospatial Information, Hyungjin Shin, Hyosok Chae, Euiho Hwang

International Conference on Hydroinformatics

Recently, two international standard organizations, ISO and OGC, have done the work of standardization for GIS. Current standardization work for providing interoperability among GIS DB focuses on the design of open interfaces. But, this work has not considered procedures and methods for designing river geospatial data. Eventually, river geospatial data has its own model. When we share the data by open interface among heterogeneous GIS DB, differences between models result in the loss of information. In this study a plan was suggested both to respond to these changes in the information envirnment and to provide a future Smart River-based river …

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Evaluation Of Reservoir Model Integration With Deterministic And Probabilistic Streamflow Forecasts, Gökçen Uysal, Aynur Şensoy, A. Arda Şorman, M. Cansaran Ertaş, Emmanuel Roulin Aug 2014

Evaluation Of Reservoir Model Integration With Deterministic And Probabilistic Streamflow Forecasts, Gökçen Uysal, Aynur Şensoy, A. Arda Şorman, M. Cansaran Ertaş, Emmanuel Roulin

International Conference on Hydroinformatics

Due to the increase in water demand and hydropower energy, it is getting more important to operate hydraulic structures in an efficient manner while sustaining multiple demands. Especially, companies, governmental agencies, consultant offices require effective, practical integrated tools and decision support frameworks to operate reservoirs, cascades of run-of-river plants and related elements such as canals by merging hydrological and reservoir simulation/optimization models with various numerical weather predictions, radar and satellite data. The model performance is highly related with the streamflow forecast, related uncertainty and its consideration in the decision making. While deterministic weather predictions and its corresponding streamflow forecasts directly …

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Overview Of Coupling Of Data, Models And Information Through The Web Using Existing Standards, Gerben De Boer, Fedor Baart, Bernhard P. J. Becker, Bert Jagers Aug 2014

Overview Of Coupling Of Data, Models And Information Through The Web Using Existing Standards, Gerben De Boer, Fedor Baart, Bernhard P. J. Becker, Bert Jagers

International Conference on Hydroinformatics

Assessment of environmental status and integral safety requires combination of information from many sources, coming from either databases or increasingly via live model (scenario) simulations. Many of these models require input from one another, sometimes unidirectional, but more and more two-directional as well. Many protocols and frameworks are available for model coupling, often based on open standards and implementations. Previous overviews of coupling protocols have focused on data exchange volume, data complexity, invasiveness into existing models and support for specific programming languages. We extend the overview using recent developments in web-based protocols and focus on the suitability for internet-based data …

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Using Smart Grid Technologies To Protect Human Health In Water Distribution Systems, Graham Symmonds Aug 2014

Using Smart Grid Technologies To Protect Human Health In Water Distribution Systems, Graham Symmonds

International Conference on Hydroinformatics

Since the introduction of the Safe Drinking Water Act, there has been marked reduction in the number of water-borne disease outbreaks attributed to water treatment systems. Over the same period, however, the percentage of disease outbreaks attributable to defects in the distribution system has increased exponentially. Interestingly, as a result of the continuous aging infrastructure employed by our water utilities, the number of water-borne disease cases has increased in the last decade. The smart grid for water can be used to significantly improve both the utility's understanding of water quality in the distribution system, but can dramatically increase the response …

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Build A Matching System Between Catchment Complexity And Model Complexity For Better Flow Modelling, Lu Zhuo, Dawei Han Aug 2014

Build A Matching System Between Catchment Complexity And Model Complexity For Better Flow Modelling, Lu Zhuo, Dawei Han

International Conference on Hydroinformatics

Hydrological models play an important role in water resource management and flood risk management. However, there is a lack of comparative analysis on the performance of those models to guide hydrologists to choose suitable models for the individual catchment conditions. This paper describes a two-level meta-analysis to develop a matching system between catchment complexity (based on catchment significant features CSFs) and model complexity (based on model types). The objective is to use the available CSFs information for choosing the most suitable model type for a given catchment. In this study, the CSFs include the elements of climate, soil type, land …

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Comparative Study On Water Resources Assessment Between Kenya And England, Hesbon Otieno, Dawei Han Aug 2014

Comparative Study On Water Resources Assessment Between Kenya And England, Hesbon Otieno, Dawei Han

International Conference on Hydroinformatics

Water resources systems are important for various uses such as agriculture, water supply, energy, transportation, recreation, ecosystems, among others. Design of water resources systems is of increasing importance due to the ever increasing demand for efficient water management. This study explores water resources assessment in two different regions with contrasting climate, socio-economic development level and data availability. The Thames catchment in England is in the temperate zone, which is data rich and is at a high socioeconomic development level; while, The Tana catchment in Kenya is in the tropics, which is data poor and at a low socioeconomic development level. …

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Empirical Regression Model Using Ndvi, Meteorological Factors For Estimation Of Wheat Yield In Yunnan, China, Jing Huang, Qiang Dai, Huimin Wang, Dawei Han Aug 2014

Empirical Regression Model Using Ndvi, Meteorological Factors For Estimation Of Wheat Yield In Yunnan, China, Jing Huang, Qiang Dai, Huimin Wang, Dawei Han

International Conference on Hydroinformatics

Crop yield estimation is of great importance to food security. NDVI, as an effective crop monitoring tool, is extensively used in crop yield estimation. However there are few studies conducted in the regions where mixed crops are grown. In this study, a statistical approach for crop area identification is proposed and applied to wheat in Jianshui County in the Nanpan River Basin, Yunnan Province of China. Based on the correlation analysis between MODIS NDVI data and crop yield, the planting areas are identified, as well as the best periods for a reliable estimation. Regression models are presented to predict the …

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Numerical Study On Climate Variation And Population Growth Impacts On An Australian Subtropical Water Supply Reservoir, Edoardo Bertone, Rodney Stewart, Hong Zhang, Kelvin O'Halloran Aug 2014

Numerical Study On Climate Variation And Population Growth Impacts On An Australian Subtropical Water Supply Reservoir, Edoardo Bertone, Rodney Stewart, Hong Zhang, Kelvin O'Halloran

International Conference on Hydroinformatics

Proactively managing high manganese (Mn) concentrations in drinking water supply reservoirs can be problematic for treatment plant operators. Typically, Mn monitoring is conducted manually and costly on a regular basis (e.g. weekly) throughout the entire year through water samplings and laboratory analysis. However, in the major water supply reservoir of the sub-tropical Gold Coast City region in Australia (i.e. Hinze Dam), a vertical profiling system (VPS) was installed and enabled a real-time data acquisition of many physical parameters of water. But these VPS parameters are not able to directly collect and analyse Mn concentrations. In the present study, a Decision …

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Rainfall Interpolation Models Obtained By Means Of Evolutionary Computing, Maritza L. Arganis, Margarita Preciado, Katya Rodriguez, Alfredo Ocon, Ramón Domínguez Mora Aug 2014

Rainfall Interpolation Models Obtained By Means Of Evolutionary Computing, Maritza L. Arganis, Margarita Preciado, Katya Rodriguez, Alfredo Ocon, Ramón Domínguez Mora

International Conference on Hydroinformatics

Complete missing records is a matter of great importance in hydrology problems. In this work we applied genetic algorithms and genetic programming models for precipitation in Cutzamala River Basin, Mexico, such models depend on the geographical coordinates and altitude of climatologic stations currently in operation. The obtained models were applied to interpolate 24 hours rainfalls for three analyzed storms. The Genetic programming model outperformed the genetic algorithm in the estimation of precipitation 24 hours estimated on a site, with respect to the measured data.

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Development Of An Autonomous And Intelligent System For Residential Water End Use Classification, Khoi Anh Nguyen, Rodney Stewart, Hong Zhang Aug 2014

Development Of An Autonomous And Intelligent System For Residential Water End Use Classification, Khoi Anh Nguyen, Rodney Stewart, Hong Zhang

International Conference on Hydroinformatics

Urban water supplies need to be ingeniously managed as a result of urbanisation and diminishing dam yield reliability. The advanced management of urban water consumption is deemed essential to maintain a sustainable water future. Understanding how, when and why water is used is vital for managing demand in cost-effective and equitable ways. Detailed knowledge on the quantities of water used in different circumstances gives critical knowledge for forecasting water and planning for water security (Stewart et al., 2010; 2011). Current intelligent water metering systems allow for the high resolution time series reading of water consumption (Beal et al. 2011). Such …

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A Novel Decision Support System For Optimized Sewer Infrastructure Asset Management, Ben Ward, Dragan A. Savić Aug 2014

A Novel Decision Support System For Optimized Sewer Infrastructure Asset Management, Ben Ward, Dragan A. Savić

International Conference on Hydroinformatics

This paper approaches the sewerage asset management challenge from a UK perspective by outlining a comprehensive methodology capable of optimising the performance of sewerage infrastructure networks using a series of Hydroinformatic tools. In order to define, evaluate and forecast the future performance of sewerage assets, a unique deterioration model is established to predict the future condition of the network. The model analyses historic CCTV survey information to identify deterioration trends based on key pipe characteristics. Against, this improved understanding of past, current and future condition, a collapse rate is predicted by correlating historic failures against the observed sewer condition profiles. …

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High Resolution Bathymetric Lidar Data To Hydraulic - Modelling A Mountain Stream By Bathymetric Lidar Data, Wolfgang Dobler, Frank Steinbacher, Ramona Baran, Markus Aufleger Aug 2014

High Resolution Bathymetric Lidar Data To Hydraulic - Modelling A Mountain Stream By Bathymetric Lidar Data, Wolfgang Dobler, Frank Steinbacher, Ramona Baran, Markus Aufleger

International Conference on Hydroinformatics

Knowledge about the hydraulic situation in a mountain torrent is relevant to quantify flood risks, to study sediment transport and to assess the waterbodies’ ecology. To conduct reliable calculations, high-quality terrain data of riverbeds, riverbanks and floodplains are required. Typically, digital terrain models (DTMs) of floodplains are derived from classical airborne laserscanning (red wavelength) together with terrestrial surveys along riverbeds and riverbanks. Usually these are restricted to a limited number of cross sections. The terrestrial surveys are necessary because those laser systems cannot penetrate through the water column of the observed waterbodies. Consequently, data for the geometry of riverbeds and …

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Quantification Of Rainfall Forecast Uncertainty And Its Impact On Flood Forecasting, Niels Van Steenbergen, Patrick Willems Aug 2014

Quantification Of Rainfall Forecast Uncertainty And Its Impact On Flood Forecasting, Niels Van Steenbergen, Patrick Willems

International Conference on Hydroinformatics

Rainfall forecast errors are considered to be the key source of uncertainty in flood forecasting. To quantify the rainfall forecast uncertainty itself and its impact on the total flood forecast uncertainty, a Monte-Carlo based statistical method has been developed. This method takes into account the dependency of the rainfall forecast error with the lead time and the rainfall amount. The forecasted rainfall errors are described by truncated normal distributions, allowing to quantify the full uncertainty distribution of the deterministic rainfall forecast. By means of Monte-Carlo sampling and taking the forecast error autocorrelation into account, the impact of the rainfall forecast …

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