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Uncertainty Propagation Throughout An Integrated Water-Quality Model, Gabriele Freni, G. Mannina, G. Viviani Jul 2010

Uncertainty Propagation Throughout An Integrated Water-Quality Model, Gabriele Freni, G. Mannina, G. Viviani

International Congress on Environmental Modelling and Software

In integrated urban drainage water quality models, due to the fact that integrated approaches are basically a cascade of sub-models (simulating sewer system, wastewater treatment plant and receiving water body), uncertainty produced in one sub-model propagates to the following ones depending on the model structure, the estimation of parameters and the availability and uncertainty of measurements in the different parts of the system. Uncertainty basically propagates throughout a chain of models in which simulation output from upstream models is transferred to the downstream ones as input. The overall uncertainty can differ from the simple sum of uncertainties generated in each …

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Bio-Economic Effects Of Water Shortages On Shellfish Farming. An Integrated Dynamic Modelling Approach, J. A. Pérez Agúndez, Johanna Ballé-Béganton, Rémi Mongruel, Cédric Bacher, O. Le Moine, P. Soletchnik, S. Robert, S. Guesdon Jul 2010

Bio-Economic Effects Of Water Shortages On Shellfish Farming. An Integrated Dynamic Modelling Approach, J. A. Pérez Agúndez, Johanna Ballé-Béganton, Rémi Mongruel, Cédric Bacher, O. Le Moine, P. Soletchnik, S. Robert, S. Guesdon

International Congress on Environmental Modelling and Software

The land-sea interfaces are geographical areas rich in ecosystemic services. However, the increase of anthropogenic pressures is frequently the factor explaining environmental damages phenomena and generating many use conflicts. The integrated coastal zones management has been acknowledged by the different environment international conferences as a sustainability framework. Integration is the key concept on which must be based the reformulation of scientific knowledge required for supporting sustainable governance. That directly questions on the pertinent methods and tools to build for contributing to those decision making processes. This paper explores these topics by focusing on the example of the fresh water share …

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Performance Evaluation Of Environmental Models, Neil D. Bennett, B. F. W. Croke, A. J. Jakeman, Lachlan T. H. Newham, J. P. Norton Jul 2010

Performance Evaluation Of Environmental Models, Neil D. Bennett, B. F. W. Croke, A. J. Jakeman, Lachlan T. H. Newham, J. P. Norton

International Congress on Environmental Modelling and Software

For environmental models to be effectively used for management and decision making purposes it is necessary to have confidence in their performance. This paper reviews techniques available for performance evaluation of environmental models. Both quantitative and qualitative performance evaluation are considered and application recommendations for environmental models are provided.

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Modelling The Spread Of Influenza-Like Illnesses In An Urban Environment, R. Neighbour, M. Borkowski, S. Mukhi1, M. R. Friesen, R. D. Mcleod Jul 2010

Modelling The Spread Of Influenza-Like Illnesses In An Urban Environment, R. Neighbour, M. Borkowski, S. Mukhi1, M. R. Friesen, R. D. Mcleod

International Congress on Environmental Modelling and Software

This work extends ongoing development of a framework for modelling the spread of contact-transmission infectious diseases within urban environments, where modelling is augmented with surveillance data and diseases of interest are primarily influenza-like illnesses (ILI). The data sources include socio-ecological elements, in which physical environments (community, neighbourhood) coupled with census data allow inferences relative to targeted populations. The framework is built upon Agent Based Modeling (ABM), with emphasis on urban scale modelling integrated with institutional models of hospital emergency departments. The scenarios presented here include modeling an outbreak of a pH1N1, surges at Hospital emergency departments, demographic data integration, and …

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Towards The Adoption Of Integrated Urban Water Management For Planning, Shiroma Maheepala Jul 2010

Towards The Adoption Of Integrated Urban Water Management For Planning, Shiroma Maheepala

International Congress on Environmental Modelling and Software

Integrated Urban Water Management is an emerging approach for urban waterutilities to plan and manage urban water systems to minimize their impact on the naturalenvironment, to maximize their contribution to social and economic vitality and toengender overall community improvement. The obvious starting point for adopting theIUWM approach is the strategic planning phase. However, little has been written onprocesses that enable application of the IUWM approach to planning. Identifying thisknowledge gap, the Water Research Foundation and the CSIRO, Australia jointlydeveloped a framework to adopt IUWM approach to strategic planning of urban watersystems (referred to as IUWM Planning Framework). This paper discusses …

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Modelling Human Health By Levels Of Biological Organization, Wilfred R. Cuff, Clifford Clark, Paulette Richard, Venkata R S K Duvvuri Jul 2010

Modelling Human Health By Levels Of Biological Organization, Wilfred R. Cuff, Clifford Clark, Paulette Richard, Venkata R S K Duvvuri

International Congress on Environmental Modelling and Software

The hierarchy of levels in the organization of matter, or the “hierarchy of life”, is a fundamentalconcept in biology, and biologists are used to thinking about their work asbeing at a particular level. Yet medicine, in both research and application, operatessomewhat independently of this concept, working almost exclusively at levels at or belowthe individual. Through the relatively-recent expansion of epidemiology, medicinedoes reach up to the level of the population - but medicine at higher levels of biologicalorganization remains under-developed. In this paper we review the biological idea ofhierarchy of life and explore what medical research and practice might look like …

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Hydrologists Workbench: A Governance Model For Scientific Workflow Environments, Box Paul Jul 2010

Hydrologists Workbench: A Governance Model For Scientific Workflow Environments, Box Paul

International Congress on Environmental Modelling and Software

Scientific workflows (SWF) are an emerging approach that enables scientists tocompose and execute complex, distributed scientific processes. The approach is premisedon the ability to compose, publish, share and reuse workflows across distributedcommunities of collaborating scientists. Scientific workflow software (SWFS) provides atechnical framework to compose, publish, and reuse SWFs together with data, functionalityand computational and other resources upon which they rely. Tools and components arebuilt using service oriented architecture approaches with data and functionality exposedthrough services. Together, interoperable components from different initiatives forminformation infrastructure (which as socio-technical endeavours, present specificgovernance challenges. As workflows, and the resources upon which they rely aredistributed …

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A Review Of User Interface Conventions In Web Applications For Climate Change Information, Markus Wrobel, Luis Costa, Tabea Lissner, Marta Moneo Laín, Tobias Weib, Jürgen Kropp Jul 2010

A Review Of User Interface Conventions In Web Applications For Climate Change Information, Markus Wrobel, Luis Costa, Tabea Lissner, Marta Moneo Laín, Tobias Weib, Jürgen Kropp

International Congress on Environmental Modelling and Software

Web applications are increasingly applied to provide access to the complex field of climate change related information. We review a sample of 32 applications that utilize maps in the context of web enabled access to climate change information in order to examine if the emergence of UI conventions across applications can be observed.

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Development Of A Methodology For Integrated Water Resources Management In Mediterranean Phosphate Mine Areas, Bru Kathy, Graveline Nina, Soulis Konstantinos, Nicholas Dercas, Angeliki Stefopoulou, Guesmi Anis, Karaouli Fatma, Slimani Mohamed, Guezennec Anne- Gwenaëlle Jul 2010

Development Of A Methodology For Integrated Water Resources Management In Mediterranean Phosphate Mine Areas, Bru Kathy, Graveline Nina, Soulis Konstantinos, Nicholas Dercas, Angeliki Stefopoulou, Guesmi Anis, Karaouli Fatma, Slimani Mohamed, Guezennec Anne- Gwenaëlle

International Congress on Environmental Modelling and Software

Mediterranean phosphate mine areas are located in semi-arid regions characterized by water scarcity and pronounced climatic variability. The increasing water demand, due to the development of the mining, agricultural and other socio-economic sectors, threatens groundwater resources. This situation represents a limiting factor to the sustainable development of these regions and it may result in conflicts between the water users. This raises the demand for an integrated water resources management (IWRM). This paper presents the methodology developed and applied in the European research project Elmaa to develop a tool for integrated water management in Mediterranean phosphate mine areas. This methodology consisted …

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Agrohydrologos: Development And Testing Of A Spatially Distributed Agro-Hydrological Model On The Basis Of Arcgis., Soulis Konstantinos, Nicholas Dercas Jul 2010

Agrohydrologos: Development And Testing Of A Spatially Distributed Agro-Hydrological Model On The Basis Of Arcgis., Soulis Konstantinos, Nicholas Dercas

International Congress on Environmental Modelling and Software

In this paper the development and testing of AgroHydroLogos is presented, which is a new spatially distributed, continuous hydrological model. The model was developed as an extension of the ESRI ArcGIS Geographical Information Systems’ software package. It calculates, on a daily basis, the main hydrological balance components, and other important parameters, including plants water stress and irrigation water needs. Its conceptual scheme was based on simplified but well established methods for the simulation of the various hydrological processes. The hydrological model is being developed using object oriented programming techniques, and its Graphical User Interface is very easy to use and …

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Use Of Hydraulic Modelling To Aid Decision Making In The Management Of Oakley Creek, Achela K. Fernando, Bruck Gebreselasie, Jacinto Capiral Jul 2010

Use Of Hydraulic Modelling To Aid Decision Making In The Management Of Oakley Creek, Achela K. Fernando, Bruck Gebreselasie, Jacinto Capiral

International Congress on Environmental Modelling and Software

This paper presents how a hydrodynamic Modelling study can be used tomaximise the collective efforts from the stakeholders to enhance the protection of a riparianenvironment. A hydraulic model of a sensitive part of the Oakley Creek in Auckland, NewZealand, was developed to identify and assess the existing and possible future erosion,flooding and storm water related issues. The stakeholders’ were involved in all the stagesof the project.Oakley Creek has a catchment area of 1220 ha comprising of predominately residentialland on the Auckland Isthmus, and discharges into the Waitemata Harbour adjacent to theNorth Western motorway interchange at Waterview. The creek traverses the …

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Mathematical Modelling Of Large Forest Fires, Valeriy Perminov Jul 2010

Mathematical Modelling Of Large Forest Fires, Valeriy Perminov

International Congress on Environmental Modelling and Software

The paper suggested in the context of the general mathematical model of forest fires gives a mathematical setting and method of numerical solution of a problem of a large forest fire initiation. The mathematical model a large forest fire is based on an analysis of known experimental data and using concept and methods from reactive media mechanics. The boundary-value problem is solved numerically using the method of splitting according to physical processes. Fields of temperature, velocity, component mass fractions, and volume fractions of phases were obtained numerically. It allows investigating dynamics of forest fire initiation under influence of various external …

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Agrohydrologos: Development And Testing Of A Spatially Distributed Agro-Hydrological Model On The Basis Of Arcgis., Soulis Konstantinos, Nicholas Dercas Jul 2010

Agrohydrologos: Development And Testing Of A Spatially Distributed Agro-Hydrological Model On The Basis Of Arcgis., Soulis Konstantinos, Nicholas Dercas

International Congress on Environmental Modelling and Software

In this paper the development and testing of AgroHydroLogos is presented, which is a new spatially distributed, continuous hydrological model. The model was developed as an extension of the ESRI ArcGIS Geographical Information Systems’ software package. It calculates, on a daily basis, the main hydrological balance components, and other important parameters, including plants water stress and irrigation water needs. Its conceptual scheme was based on simplified but well established methods for the simulation of the various hydrological processes. The hydrological model is being developed using object oriented programming techniques, and its Graphical User Interface is very easy to use and …

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Response Surface Approximation And Interactive Decision Maps For Water Quality Planning, A. Castelletti, D. Limosani, Alexander V. Lotov, X. Quach, R. Soncini-Sessa Jul 2010

Response Surface Approximation And Interactive Decision Maps For Water Quality Planning, A. Castelletti, D. Limosani, Alexander V. Lotov, X. Quach, R. Soncini-Sessa

International Congress on Environmental Modelling and Software

This study presents a new interactive procedure for supporting DecisionMakers (DMs) in environmental planning problems involving large, process-based, dynamic models and many (more than two) conflicting objectives. Because of such features of the model, computationallyonerous simulations are the only feasible way of analysis, while the multi-objective nature of the problem entails the combined use of optimization techniques and appropriate tools for the visualization of the associated Pareto frontier. The procedure proposed is based on the iterative improvement of the current best compromise alternative based on interactions with the DM. At each iteration, the DM is informed about the Pareto frontier …

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Nonlinear Optimization For Improving The Operation Of Sewer Systems: The Bogot´A Case Study., J. M. Giraldo, S. Leirens, Mario Díaz-Granados, Juan Pablo Rodríguez Jul 2010

Nonlinear Optimization For Improving The Operation Of Sewer Systems: The Bogot´A Case Study., J. M. Giraldo, S. Leirens, Mario Díaz-Granados, Juan Pablo Rodríguez

International Congress on Environmental Modelling and Software

Sewer systems are considered as complex large-scale systems that traditionally collect and transport stormwater and sanitary sewage out from urban areas. Each subsystem is in itself composed of a large number of elements with time-varying behavior, exhibiting several operating modes and subject to changes due to external conditions and operational constraints. Sewer systems are mainly operated using pumping stations and pollutants are removed from sewage by treatment plants before water is released into the environment. When a sewer overflow occurs, e.g., caused by a strong rainfall, sewage is discharged directly into the environment with some dilution but without treatment. An …

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A Multi-Agent Framework For An Iedss In Urban Water Management, Joaquín Izquierdo, Idel Montalvo, Rafael Pérez-García, Joanna A. Gutiérrez-Pérez Jul 2010

A Multi-Agent Framework For An Iedss In Urban Water Management, Joaquín Izquierdo, Idel Montalvo, Rafael Pérez-García, Joanna A. Gutiérrez-Pérez

International Congress on Environmental Modelling and Software

Managers of water supply companies must be concerned about the lack of integrity of their systems. The consequences are varied: service disruptions; pipe breaks causing water wastage; pipe cracks causing water leaks and pathogen intrusion, a serious human health risk. Despite its importance, water hammer, one of the main vulnerabilities of water systems, still represents a challenge, due to the high level of complexity this problem exhibits. It is a fact that decision making regarding this issue lack efficiency, since more powerful tools are needed. One of the drawbacks of computer packages for hydraulic transient simulation in complex systems resides …

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Integrated Water Resource Security Evaluation Of Beijing Based On Grey Relation Analysis And Topsis, Jing Dai, Jingjing Chi, Bin Chen, Liping Ju Jul 2010

Integrated Water Resource Security Evaluation Of Beijing Based On Grey Relation Analysis And Topsis, Jing Dai, Jingjing Chi, Bin Chen, Liping Ju

International Congress on Environmental Modelling and Software

Security evaluation has become a hot topic in the research field of water resource management. In this paper, we established a novel water resource security indicator system based on the Pressure-Status-Response (PSR) framework using grey relation analysis and technique for order preference by similarity to ideal solution (TOPSIS). A case study of Beijing from 1996 to 2007 was conducted to verify the evaluation system. Results showed that the grey relative closeness degrees of water resource security to the positive ideal solution were low, with the least one of 0.360 in 1999 and largest one of 0.527 in 2007, implying that …

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Visions For The Future Of Water In Seyhan Basin, Turkey: A Backcasting Application, Erol H. Cakmak, Hasan Dudu, Ozan Eruygur, Metin Ger, Sema Onurlu, Özlem Tonguc Jul 2010

Visions For The Future Of Water In Seyhan Basin, Turkey: A Backcasting Application, Erol H. Cakmak, Hasan Dudu, Ozan Eruygur, Metin Ger, Sema Onurlu, Özlem Tonguc

International Congress on Environmental Modelling and Software

This paper reports backcasting results on the future of water in the SeyhanBasin, Turkey. The participative backcasting methodology uses prior information obtainedfrom stakeholders about the present, future and estimated states of water to optimize timeuse during the implementation. The study involved a broad range of stakeholders spanningfrom central decision makers to farmers. Reliable scenarios exploiting all kinds ofinformation sources are crucial in developing dependable and feasible policy options totackle the challenges residing in water management issues. Perception of the current watersystem and a structured view of the future in the Seyhan Basin have been determined. Thedesirable goal has been set …

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Agent-Based Model Of The Growth Of An Informal Settlement In Dar Es Salaam, Tanzania: An Empirically Informed Concept, Gina Felicia Young, Johannes Flacke Jul 2010

Agent-Based Model Of The Growth Of An Informal Settlement In Dar Es Salaam, Tanzania: An Empirically Informed Concept, Gina Felicia Young, Johannes Flacke

International Congress on Environmental Modelling and Software

The paper discusses the use of empirical evidence to derive the concept for aspatially explicit agent-based model that simulates land-use change in an informalsettlement in the city of Dar es Salaam, Tanzania. Dar es Salaam’s informal settlements arehome to 70 – 80 % of the city’s residents and are characterized by high housing densities,unstructured road infrastructure and inadequate water, electricity, and sewerage services.However, they differ from typical Sub-Saharan informal settlements in two main ways:First they consist of residents with varying socioeconomic backgrounds, specificallyincome, education, and type of employment. Second, plots of land are not squatted on. Themain purpose of the …

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Sustainable Forest Management For Bioenergy, Giulia Fiorese, Giorgio Guariso Jul 2010

Sustainable Forest Management For Bioenergy, Giulia Fiorese, Giorgio Guariso

International Congress on Environmental Modelling and Software

Biomass from the forest sector can be an important source of renewable energy and can contribute to climate change mitigation and bioenergy development. However, the removal of biomass from forests can have significant impacts on the forest ecosystems and therefore requires a thorough analysis. The purpose of this work is to compare different alternatives of sustainable forest management with the aim of minimizing greenhouse gases emission. The model used for the analysis, CO2FIX, describes the flows of carbon per unit area of biomass, soil storage and bioenergy products. The model was applied to the forests of the Italian region of …

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A Generic Framework For Multi-Disciplinary Environmental Modelling, Rolf Hennicker, Sebastian S. Bauer, Stephan Janisch, Matthias Ludwig Jul 2010

A Generic Framework For Multi-Disciplinary Environmental Modelling, Rolf Hennicker, Sebastian S. Bauer, Stephan Janisch, Matthias Ludwig

International Congress on Environmental Modelling and Software

We present a generic framework for computer-based environmental modelling which supports the coupling of simulation models from various sciences to perform integrative simulations. The framework is, in principle, applicable to any kind of model which simulates spatially distributed environmental processes with an arbitrary, but discrete, time scale. During an integrative simulation the framework coordinates the coupled models which run in parallel exchanging iteratively data via their interfaces. For proving the correctness of the coordination, formal methods of software development have been applied. The framework provides a developer interface for the implementation of natural science and socio-economic simulation models. For the …

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Extended Exergy-Based Ecological Accounting Of China During 2000-2007, Jing Dai, Bin Chen, H. Lin Jul 2010

Extended Exergy-Based Ecological Accounting Of China During 2000-2007, Jing Dai, Bin Chen, H. Lin

International Congress on Environmental Modelling and Software

Since the resources from environment are in short supply, it is necessary to alleviate the conflict between high-speed economic construction and limited resources in the Chinese society. This paper aims to analysis the variation of natural resources input into China during 2000-2007 based on extended exergy as an eco-centric metric. With the materials, labor, capital and environmental renovation quantified by exergy numeraire grounding on the second-law metric in view of ecological accounting, the composition and proportion of extended exergy clearly revealed the whole condition of available energy input into society in China. Moreover, two indexes, i.e., extended exergy consumption intensity …

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Participation In Multi-Criteria Decisions: A Software Tool And A Case Study, Eliot Laniado, Alessandro Luè, Simona Muratori Jul 2010

Participation In Multi-Criteria Decisions: A Software Tool And A Case Study, Eliot Laniado, Alessandro Luè, Simona Muratori

International Congress on Environmental Modelling and Software

The paper describes AMACI, a software prototype supporting the decision process in the choice among alternatives. AMACI has been designed in the context of environmental assessment, considering participation essential to elicit interests and judgment parameters of the different groups involved in the decision. Therefore, the software makes possible a clear and transparent communication and supports the active involvement of the stakeholders. The main features of AMACI are the following: it provides a framework for the description of a decision problem and structures the decision making process for each decision-maker; it makes use of the classical multiattribute decision analysis, including tools …

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Decision Support For Environmental Monitoring And Restoration: Application Of The Partially Observable Markov Decision Process, David Tomberlin Jul 2010

Decision Support For Environmental Monitoring And Restoration: Application Of The Partially Observable Markov Decision Process, David Tomberlin

International Congress on Environmental Modelling and Software

Environmental monitoring programs can improve management over time, butgenerally require that correspondingly less time and money be put into direct restorationefforts such as revegetation or dam removal. Thus, budget constraints compelenvironmental managers to make difficult decisions regarding the allocation of scarcefunds and personnel between environmental monitoring and environmental restoration.Among other factors, the best allocation of resources between monitoring and restoration—or, more generally, learning and doing—will depend on the quality of information availablefrom a monitoring program. This paper demonstrates the application of the partiallyobservable Markov decision process (POMDP) as a framework for investigating theoptimal intensity of monitoring given stochastic state dynamics …

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Model Of Ventilated Façade In Buildings By Using Cfd Techniques, P. Amparo López-Jiménez, Miguel Mora-Pérez, Gonzalo López-Patiño, Miguel A. Bengochea Escribano Jul 2010

Model Of Ventilated Façade In Buildings By Using Cfd Techniques, P. Amparo López-Jiménez, Miguel Mora-Pérez, Gonzalo López-Patiño, Miguel A. Bengochea Escribano

International Congress on Environmental Modelling and Software

In some countries, summer over-heating is a big problem in a building’s energy balance. Ventilated façades are a useful tool when applied to building design, especially in bioclimatic building design. A ventilated façade is a complex, multi-layer structural solution that enables dry installation of the covering elements. The objective of this paper is to quantify of the improvement in the efficiency of the thermal behaviour of buildings when this sort of façade is installed. These improvements are related to the ventilation capacity of the additional structure to the shield mainly for saving cooling power in summer in warm countries. This …

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From Prediction To Learning: The Implications Of Changing The Purpose Of The Modelling Activity, Marcela Brugnach Jul 2010

From Prediction To Learning: The Implications Of Changing The Purpose Of The Modelling Activity, Marcela Brugnach

International Congress on Environmental Modelling and Software

During the last decades, there has been a growing interest in the use of models for natural resource management. While early models were theoretical representations of simple systems designed to predict, in time or space, the behaviour of a system, current modelling applications expand beyond prediction. Models, and particularly the whole model building process, have become useful tools to support dialogue, learning and negotiation processes in stakeholders groups. For example, models are currently being used to improve collaboration between expert and stakeholder groups, to facilitate the negotiation between conflicting parties, or as a tool for group reflection, just to mention …

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Use Of Hydraulic Modelling To Aid Decision Making In The Management Of Oakley Creek, Achela K. Fernando, Bruck Gebreselasie, Jacinto Capiral Jul 2010

Use Of Hydraulic Modelling To Aid Decision Making In The Management Of Oakley Creek, Achela K. Fernando, Bruck Gebreselasie, Jacinto Capiral

International Congress on Environmental Modelling and Software

This paper presents how a hydrodynamic Modelling study can be used tomaximise the collective efforts from the stakeholders to enhance the protection of a riparianenvironment. A hydraulic model of a sensitive part of the Oakley Creek in Auckland, NewZealand, was developed to identify and assess the existing and possible future erosion,flooding and storm water related issues. The stakeholders’ were involved in all the stagesof the project.Oakley Creek has a catchment area of 1220 ha comprising of predominately residentialland on the Auckland Isthmus, and discharges into the Waitemata Harbour adjacent to theNorth Western motorway interchange at Waterview. The creek traverses the …

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Development Of A Decision Support System (Elmaadss) For The Integrated Water Management Of Mediterranean Phosphate Mining Areas, Soulis Konstantinos, Nicholas Dercas, Bru Kathy, Graveline Nina, Angeliki Stefopoulou Jul 2010

Development Of A Decision Support System (Elmaadss) For The Integrated Water Management Of Mediterranean Phosphate Mining Areas, Soulis Konstantinos, Nicholas Dercas, Bru Kathy, Graveline Nina, Angeliki Stefopoulou

International Congress on Environmental Modelling and Software

The phosphate industry is a major contributor to the economy of many South Mediterranean countries. Large volumes of water are required by the mining industry in areas where water resources are scarce. The integrated management of water in the influence zone of phosphate mines with due respect to other sectors of the economy and populations is a way to further develop these regions. To achieve this objective, the implementation of a Decision Support System constitutes an innovative tool, which offers an integral view of water management in the phosphate mining areas and gives an overview of the interconnections and interactions …

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Dem Uncertainty And Hazard Analysis Using A Geophysical Flow Model, E. R. Stefanescu, M. I. Bursik, K. Dalbey, M. Jones, A. K. Patra, E. B. Pitman Jul 2010

Dem Uncertainty And Hazard Analysis Using A Geophysical Flow Model, E. R. Stefanescu, M. I. Bursik, K. Dalbey, M. Jones, A. K. Patra, E. B. Pitman

International Congress on Environmental Modelling and Software

In this paper we introduce a careful procedure for analyzing the impact of error and uncertainty in model inputs in volcanic mass flow hazard analysis. In particular we focus on uncertainty in elevation maps that are crucial to flow simulations. Our early results establish the soundness of the approach and the usefulness of the methodology for constructing probabilistic hazard maps.

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Nonlinear Optimization For Improving The Operation Of Sewer Systems: The Bogot´A Case Study., J. M. Giraldo, S. Leirens, Mario Díaz-Granados, Juan Pablo Rodríguez Jul 2010

Nonlinear Optimization For Improving The Operation Of Sewer Systems: The Bogot´A Case Study., J. M. Giraldo, S. Leirens, Mario Díaz-Granados, Juan Pablo Rodríguez

International Congress on Environmental Modelling and Software

Sewer systems are considered as complex large-scale systems that traditionally collect and transport stormwater and sanitary sewage out from urban areas. Each subsystem is in itself composed of a large number of elements with time-varying behavior, exhibiting several operating modes and subject to changes due to external conditions and operational constraints. Sewer systems are mainly operated using pumping stations and pollutants are removed from sewage by treatment plants before water is released into the environment. When a sewer overflow occurs, e.g., caused by a strong rainfall, sewage is discharged directly into the environment with some dilution but without treatment. An …

Go to article

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