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Spatial And Temporal Model Validation: Representing Landscape Properties And Processes Across Scales, C. S. Renschler
Spatial And Temporal Model Validation: Representing Landscape Properties And Processes Across Scales, C. S. Renschler
International Congress on Environmental Modelling and Software
Continuous modeling of landscape processes and their validation requires representingenvironmental properties for model input and output across scales. A combination of a scaling theory, aGeospatial Project Management Tool (GeoProMT), and a GIS-based environmental modeling interface,allows interdisciplinary collaborators to efficiently handle and communicate the scaling (or transformation)of geospatial information of properties and processes across scales. This integrated approach of theory,project management tool, and modeling interface can be applied to any environmental model and softwaredevelopment. The integrated modeling is based on the Geospatial Interface for the Water Erosion PredictionProject (GeoWEPP) that enables soil and water conservationists to assess soil erosion taking into …
Experiences In Using Evolutionary And Non-Evolutionary Optimization Methods In Models Calibration, Dimitri P. Solomatine
Experiences In Using Evolutionary And Non-Evolutionary Optimization Methods In Models Calibration, Dimitri P. Solomatine
International Congress on Environmental Modelling and Software
Modelling and decision making related to environmental problems need adequate optimization methods and tools. In case the objective function to be minimized is not known analytically and no assumption can be made about the number of its extrema, gradient-based methods are inapplicable and direct multi-extremum (global) methods must be used. Apart from the popular evolutionary and genetic algorithms, other methods appear to be at least as effective and efficient. Nine algorithms were implemented in the GLOBE global optimization system, and they are compared in terms of effectiveness (accuracy), efficiency and reliability on several benchmark and hydrologic modelling problems.
Agent-Based Modelling: A New Approach For Bridging The Gap Between Design And Use Of Models In Water Management?, Anne Gunkel
Agent-Based Modelling: A New Approach For Bridging The Gap Between Design And Use Of Models In Water Management?, Anne Gunkel
International Congress on Environmental Modelling and Software
In order to cope with the challenges ahead, water management has to become more flexible and adaptive. Consequently, improved tools are necessary for augmenting and supporting the human decision-making in water management. Agent-based models are possibly a valuable approach for the development of such tools, for example because of their relative high user friendliness. However, it is not likely that the application of a new technology achieves to overcome all the obstacles hindering possible end-users from actively using the developed tools. The question remains what makes an ABM suitable and useful for water management. Answering this question requires discussing some …
On The Prediction Of The Ecological Status Of Human-Altered Streams And Its Rule-Based Interpretation, Terence A. Etchells, Alfredo Vellido, E. Martí, Paulo J. G. Lisboa, Joaquim Comas
On The Prediction Of The Ecological Status Of Human-Altered Streams And Its Rule-Based Interpretation, Terence A. Etchells, Alfredo Vellido, E. Martí, Paulo J. G. Lisboa, Joaquim Comas
International Congress on Environmental Modelling and Software
The recent Water Framework Directive of the European Union set year 2015 as their target for freshwater and coastal ecosystems all across Europe to achieve good ecological status. This study concerns the analysis of the empirical data from the knowledge base of an environmental decision support system developed within the European project STREAMES. These data, which come from several low-order streams located mostly on the Mediterranean region, consist of measurements of several physical, chemical and biological variables. We aim to classify these data according to the ecological status of the streams they correspond to, where stream nutrient retention efficiency (a …
Improving The Use Of Data For Quantifying Uncertainty In Parameters And Predictions Of Forest Dynamic Models By Bayesian Approach, Alexander Komarov, Pavel Grabarnik, Alexey Mikhaylov, Oleg Chertov
Improving The Use Of Data For Quantifying Uncertainty In Parameters And Predictions Of Forest Dynamic Models By Bayesian Approach, Alexander Komarov, Pavel Grabarnik, Alexey Mikhaylov, Oleg Chertov
International Congress on Environmental Modelling and Software
Ecological models may include components which are stochastic: climaticparameters, spatial structure and so on. Therefore, the model outputs possess inevitableuncertainties. Moreover, the output uncertainty depends on variability and/or uncertaintyof parameters and initial values. Uncertainty analysis which studies how input variabilityinfluences a variability of output is an important part of a model building allowingseparating different sources of uncertainties. Another task, which is associated withhighly structured multiparameterized model is sensitivity analysis, goal of which is tocharacterize how the model outputs respond to changes in the inputs. Both uncertaintyand sensitivity analysis can be conducted by means of the Monte Carlo procedure. To usea …
A Gis-Based Framework To Model Farm And Landscape Scale Indicators For Sustainable Rural Development, C. Kjeldsen, Tommy Dalgaard, P. K. Bøcher
A Gis-Based Framework To Model Farm And Landscape Scale Indicators For Sustainable Rural Development, C. Kjeldsen, Tommy Dalgaard, P. K. Bøcher
International Congress on Environmental Modelling and Software
Facilitation of sustainable rural development has a high priority on the European Union policy agenda and extensive research on this subject has been started. This paper presents results from the strategic EU research project MEA-scope (www.MEA-scope.org), and the development of a GIS-based framework to model farm and landscape scale indicators for rural sustainability. Problems in scaling information between the farm- and the landscape levels in particular are addressed. Both aggregation and disaggregation techniques are needed to convey information between the two levels. This is demonstrated in a case study of (1) landscape level aggregation of farm level information, from statistics …
Ecohydraulics In The Mississippi River: Freshwater Mussel Dynamics Model, J. A. Daraio, Y. Morales-Chaves, Arthur E. Mynett, L. Weber
Ecohydraulics In The Mississippi River: Freshwater Mussel Dynamics Model, J. A. Daraio, Y. Morales-Chaves, Arthur E. Mynett, L. Weber
International Congress on Environmental Modelling and Software
The family Unionidae (freshwater mussels) is geographically diverse with species found worldwide; their greatest diversity is found in North America. Zebra mussels (Dreissena polymorpha) are an exotic species introduced into North America in the 1980’s that has since become a threat to economic interests and native mussel species in the region. IIHR-Hydroscience and Engineering and WL|Delft Hydraulics are developing a numerical model of mussel population dynamics for the purpose of analyzing alternative management strategies of zebra mussels and Unionidae in the Upper Mississippi River (UMR). The Mussel Dynamics Model (MDM) simulates interaction of mussels and the hydraulic environment. This paper …
Water Resources Management And Water Availability In The Elbe River Basin Under Conditions Of Global Change, S. Kaden, M. Kaltofen, H. Koch
Water Resources Management And Water Availability In The Elbe River Basin Under Conditions Of Global Change, S. Kaden, M. Kaltofen, H. Koch
International Congress on Environmental Modelling and Software
Global change challenges long-term planning in water management. Practical management requires plausible and consistent scenarios as well as assessments of possible climatic, technological and social developments and their impacts. These problems are subjects of research within the GLOWA Elbe II – project. The project’s goal is to develop a water management strategy for possible adaptation to global change in the Elbe river basin (about 150,000 km2). One important component of the multi-disciplinary project is the analysis of conflicts related to water availability. For that purpose a detailed water management model for the whole Elbe river basin, including the Czech part …
Erosion Of Sediment Beds By Turbulent Wall Jets In Combined-Sewer-Overflow Reservoirs, Octavio E. Sequeiros, Yarko Niño, Marcelo H. Garcia
Erosion Of Sediment Beds By Turbulent Wall Jets In Combined-Sewer-Overflow Reservoirs, Octavio E. Sequeiros, Yarko Niño, Marcelo H. Garcia
International Congress on Environmental Modelling and Software
Sediment management with the help of water jets in combined-sewer-overflow (CSOs) reservoirs in the Chicago area has motivated this work. Erosion caused by single and multiple submerged circular turbulent wall jets on a granular (non cohesive) sediment bed of finite thickness laying on a fixed boundary was studied with the help of laboratory experiments. Plane turbulent wall jets were also tested on sewer sediment in order to determine its critical shear stress. Though not strongly cohesive this sewer sediment presented some floculation. Regarding circular jets, different combinations of jet diameter, jet separation, and ratio between sediment thickness and jet diameter …
Building A Community Modeling And Information Sharing Culture, Alexey Voinov, Raleigh R. Hood, John D. Daues
Building A Community Modeling And Information Sharing Culture, Alexey Voinov, Raleigh R. Hood, John D. Daues
International Congress on Environmental Modelling and Software
By copying information from sources and distributing it to new destinations we do not loseinformation at the sources. Nevertheless, exchange of information is still restricted by patent law, as well asby institutional, cultural and traditional hurdles that create protective barriers hindering the free flow of thisvaluable commodity. We believe that one of the greatest challenges we face in creating a new researchparadigm will be building the community modeling and information sharing culture. How do we getengineers and scientists to put aside their traditional modes of doing business? How do we provide theincentives that will be required to make these changes …
State Of The Art In Methods And Software For The Identification, Resolution And Apportionment Of Contamination Sources, Roma Tauler, Pentti Paatero, Cliff Spiegelman, Eun Sug Park, Richard L. Poirot, Philip Hopke, Ronald C. Henry
State Of The Art In Methods And Software For The Identification, Resolution And Apportionment Of Contamination Sources, Roma Tauler, Pentti Paatero, Cliff Spiegelman, Eun Sug Park, Richard L. Poirot, Philip Hopke, Ronald C. Henry
International Congress on Environmental Modelling and Software
Current approaches and recent developments and software related with multivariate factor analysis and related methods in the analysis of environmental data for the identification, resolution and apportionment of contamination sources are discussed and compared
Models And Output Are Interpreted In Conflicting Frames That Cause The Gaps To Be Unbridgeable, Rien Kolkman
Models And Output Are Interpreted In Conflicting Frames That Cause The Gaps To Be Unbridgeable, Rien Kolkman
International Congress on Environmental Modelling and Software
The unreceptiveness of potential end-user organisations to the potential benefits of IAMs en DSSs can be analysed and explained by frame reflection. The notion of frame is already used in social psychology, management sciences, and policy sciences. Frames are used by a person to make sense of their environment, to make observations and decisions rationally accountable, both to themselves and to others. Frames are relevant for communication and learning at the level of both individuals and organizations. Collectively shared frames may influence how knowledge is selected and organised. This abstract focuses on the implications of frame research (Kolkman, 2005) on …
Use Of Surface Analysis On Water Quality Model Outputs To Assess Tradeoff Of Nitrogen And Phosphorus Controls, P. Wang, L. C. Linker
Use Of Surface Analysis On Water Quality Model Outputs To Assess Tradeoff Of Nitrogen And Phosphorus Controls, P. Wang, L. C. Linker
International Congress on Environmental Modelling and Software
Low summer dissolved oxygen (DO) in the Chesapeake Bay is primarily due to excessive nitrogen (N) and phosphorus (P) inputs. These nutrients cause algal blooms in the spring and summer with subsequent algal decay leading to summer oxygen depletion. In the Chesapeake Bay, N and P are generally higher than their half saturation constants for algal growth. Controlling both N and P loads are necessary due to spatial and temporal shift in nutrient limitation. Based on a set of water quality model runs, we used a surface analysis technique to establish a function of DO versus N and P loads, …
Integrated Modeling: Examining The Fate And Transport Of Contaminants In Canadian Lakes And Rivers., William Booty, David Lam, Craig Mccrimmon
Integrated Modeling: Examining The Fate And Transport Of Contaminants In Canadian Lakes And Rivers., William Booty, David Lam, Craig Mccrimmon
International Congress on Environmental Modelling and Software
With the ever increasing introduction of chemicals to the environment (approx. 4000 new chemicals are registered each day), scientists and program managers are faced with an apparently endless and overwhelming task of examining the possible ecological risks of these new chemicals as well as the existing chemicals in aquatic ecosystems. It is also well recognized that no single model will be capable of dealing with all of the different types of chemicals and the environments that these chemicals are released into. It is therefore necessary to be able to integrate a spectrum of best practice models into a system that …
A Multi-Objective Approach For Sustainable Municipal Solid Waste (Msw) Management, R. Minciardi, Massimo Paolucci, M. Robba, Roberto Sacile
A Multi-Objective Approach For Sustainable Municipal Solid Waste (Msw) Management, R. Minciardi, Massimo Paolucci, M. Robba, Roberto Sacile
International Congress on Environmental Modelling and Software
A multi-objective approach to sustainable Municipal Solid Waste (MSW) management is presented, with the aim of supporting the decisions about the optimal flows of solid waste to be sent to landfill, recycling and to the different treatment plants. To achieve this goal, an approach is proposed in which the decision makers (DMs) are interactively involved in the decision process, following the reference point methodology [Wierzbicki et al, 2002]. The method can be viewed as an integration/modification of techniques already introduced in the literature. The purpose of the DMs is to determine the various flows of the different materials in the …
Improving The Use Of Data For Quantifying Uncertainty In Parameters And Predictions Of Forest Dynamic Models By Bayesian Approach, Alexander Komarov, Pavel Grabarnik, Alexey Mikhaylov, Oleg Chertov
Improving The Use Of Data For Quantifying Uncertainty In Parameters And Predictions Of Forest Dynamic Models By Bayesian Approach, Alexander Komarov, Pavel Grabarnik, Alexey Mikhaylov, Oleg Chertov
International Congress on Environmental Modelling and Software
Ecological models may include components which are stochastic: climaticparameters, spatial structure and so on. Therefore, the model outputs possess inevitableuncertainties. Moreover, the output uncertainty depends on variability and/or uncertaintyof parameters and initial values. Uncertainty analysis which studies how input variabilityinfluences a variability of output is an important part of a model building allowingseparating different sources of uncertainties. Another task, which is associated withhighly structured multiparameterized model is sensitivity analysis, goal of which is tocharacterize how the model outputs respond to changes in the inputs. Both uncertaintyand sensitivity analysis can be conducted by means of the Monte Carlo procedure. To usea …
Impact Assessment Of Ensembles Of Small Reservoirs In Semi-Arid Regions., Nick Van De Giesen, Marc Andreini, Annette Huber-Lee, Aidan Senzanje, Jens Liebe, Lineu Rodrigues, Philippe Cecchi, Winston Andah, Eline Boelee, Tonya Schuetz
Impact Assessment Of Ensembles Of Small Reservoirs In Semi-Arid Regions., Nick Van De Giesen, Marc Andreini, Annette Huber-Lee, Aidan Senzanje, Jens Liebe, Lineu Rodrigues, Philippe Cecchi, Winston Andah, Eline Boelee, Tonya Schuetz
International Congress on Environmental Modelling and Software
In the semi-arid regions of the world, a single small reservoir will, in general, have a positive socio-economic impact on nearby villages. To extend the availability of water collected during the rainy into the dry season has advantages in terms of irrigation, household water supply, fishery, and cattle. Large dams tend to have many negative impacts (displacement of people, large scale destruction of ecosystems, poor governance, etc.) that small reservoirs do not have. It is, therefore, not surprising that small reservoirs are seen by governments, international donors, and NGO's as an important means to improve rural livelihoods. In Burkina Faso, …
A Component To Simulate Agricultural Management, Marcello Donatelli, Frits Van Evert, A. Di Guardo, Myriam Adam, Kamal Kansou
A Component To Simulate Agricultural Management, Marcello Donatelli, Frits Van Evert, A. Di Guardo, Myriam Adam, Kamal Kansou
International Congress on Environmental Modelling and Software
Quantifying the impact of agricultural management on production and system externalities is the goal of many agricultural modeling studies. Here we consider only those drivers of farmers’ decision making that are based on the state of the agricultural system. Agricultural management must be simulated in such a way to mimic as closely as possible farmers’ behaviour. Limiting the drivers of the decision making process to the biophysical system implies that each action must be triggered at run time via a set of rules which can be based on the state of the system, on constraints of resources availability, and on …
Information Integration Through Ontology And Metadata For Sustainability Analysis, V. Brilhante, A. Ferreira, J. Marinho, J. S. Pereira
Information Integration Through Ontology And Metadata For Sustainability Analysis, V. Brilhante, A. Ferreira, J. Marinho, J. S. Pereira
International Congress on Environmental Modelling and Software
Indicators of Sustainable Development (ISDs) make up a sophisticated set of information that can be employedas a means to study many aspects of a system’s sustainability. Methods for producing ISDs, as well as environmentalmodels in general, typically are strongly backed by data, so as to heighten their trustworthiness.This work proposes a sustainability analysis framework where higher level forms of data description, namely,a domain ontology and metadata, are employed to harness the data and to provide relevant elicited informationto a software tool which is ultimately responsible for yielding levels of sustainability of systems under analysis.Having the framework equipped with a metadata …
Using The Monte Carlo Method To Quantify Uncertainty In Predictions Of A Soil Carbon Cycle Model In Balsam Fir (Abies Balsamea (L.) Mill.) And Black Spruce (Picea Mariana (Mill.) B.S.P.) Forest Ecosystems In The Boreal Forest, G. R. Larocque, D. Paré, R. Boutin, V. Lacerte
Using The Monte Carlo Method To Quantify Uncertainty In Predictions Of A Soil Carbon Cycle Model In Balsam Fir (Abies Balsamea (L.) Mill.) And Black Spruce (Picea Mariana (Mill.) B.S.P.) Forest Ecosystems In The Boreal Forest, G. R. Larocque, D. Paré, R. Boutin, V. Lacerte
International Congress on Environmental Modelling and Software
The majority of process-based models of thecarbon cycle in forest ecosystems aredeterministic. Very few components have beenimplemented in these models to represent theuncertainty that may result from natural variation,model structure and parameter estimates. Thereare many sources of natural variation in thecarbon cycle of forest ecosystems. The mainsources of variation occur in the soil organicmatter (SOM) in terms of quantity and quality,both of which vary according to vegetation type,climatic conditions, soil characteristics (textureand structure) and carbon fluxes. For instance, thelitterfall rate and periodicity influencesignificantly the carbon input in the soil organicand mineral horizons. The litter carbon andnutrient contents affect both the …
Opening Access To Environmental Software Systems, Daryl H. Hepting, Timothy Maciag
Opening Access To Environmental Software Systems, Daryl H. Hepting, Timothy Maciag
International Congress on Environmental Modelling and Software
As individuals are increasingly being called to act in environmentally-conscious ways, they will seek out any and all resources which might help to inform their actions. Unfortunately, a 2002 OECD report indicated that there seemed to be declining trust of environmental information sources and increasing confusion about which actions could be most beneficial. Environmental Software Systems can provide relief in this context, if the software design is user-centered. The very specialized nature of much environmental software may discourage these design practices, but this is a false economy. Instead of software that is based on technical models developed by environmental scientists, …
Multiscale Fuel Type Characterization By Using Multisensor Remote Sensing Data For The Mediterranean Ecosystems Of Southern Italy, Rosa Lasaponara, Antonio Lanorte
Multiscale Fuel Type Characterization By Using Multisensor Remote Sensing Data For The Mediterranean Ecosystems Of Southern Italy, Rosa Lasaponara, Antonio Lanorte
International Congress on Environmental Modelling and Software
In the context of fire management, fuel maps are essential information requested at many spatial and temporal scales for managing wildland fire hazard and risk and for understanding ecological relationships between wildland fire and landscape structure. Remote sensing data provide valuable information for the characterization and mapping of fuel types and vegetation properties at different temporal and spatial scales from global, regional to landscape level.Fuel types is one of the most important factors that should be taken into consideration for computing spatial fire hazard and risk and simulating fire growth and intensity across a landscape. In the present study, forest …
Landscape Design And Agricultural Land-Use Allocation Using Pareto-Based Multi-Objective Differential Evolution, Jeroen C. J. Groot, Walter A. H. Rossing, André Jellema, Martin Van Ittersum
Landscape Design And Agricultural Land-Use Allocation Using Pareto-Based Multi-Objective Differential Evolution, Jeroen C. J. Groot, Walter A. H. Rossing, André Jellema, Martin Van Ittersum
International Congress on Environmental Modelling and Software
Intensively managed agricultural areas in North-Western Europe are undergoing a shift from solely production oriented use to provision of multiple services and functions. Design of multifunctional agricultural landscapes can be supported by exploration of the potential to effectively combine economic performance, landscape identity, nature conservation and environmental quality. The Landscape IMAGES methodology enables spatially explicit exploration of options by multi-objective optimization, for multifunctional agriculture in landscapes at a scale of a few km². The framework has been developed to support stakeholder discussions and informed decision making. For simultaneous optimization of multiple objectives the evolutionary algorithm of Differential Evolution is employed. …
Multiobjective Optimization Procedure For Control Strategies In Environmental Systems, Xavier Flores, Joaquim Comas, Ignasi Rodríguez-Roda, Laureano Jiménez, Rene Bañares-Alcántara
Multiobjective Optimization Procedure For Control Strategies In Environmental Systems, Xavier Flores, Joaquim Comas, Ignasi Rodríguez-Roda, Laureano Jiménez, Rene Bañares-Alcántara
International Congress on Environmental Modelling and Software
This paper presents a systematic procedure for multiobjective optimization of control strategies in environmental systems. The optimization of control strategies in environmental systems is a complex activity due to the large number of objectives that must be considered simultaneously e.g. economic, environmental, technical, legal. The accomplishment of those objectives generates significant synergies, but in many cases they are subject of clear trade-offs. This procedure is approached as a multicriteria decision analysis (MCDA) and involves the quantification and normalization of a set of evaluation criteria and a weighted sum. A sensitivity analysis is also included in order to show the variation …
The Multiplescale Land Use Change Model Landshift: A Scenario Analysis Of Land Use Change And Environmental Consequences In Africa., Ruediger Schaldach, Joseph Alcamo, Maik Heistermann
The Multiplescale Land Use Change Model Landshift: A Scenario Analysis Of Land Use Change And Environmental Consequences In Africa., Ruediger Schaldach, Joseph Alcamo, Maik Heistermann
International Congress on Environmental Modelling and Software
Land use and land cover change are considered as important drivers and targets of global environmental change. In this paper we present the integrated model system LandShift to simulate land use change processes and related consequences for the environment on the global and continental level. LandShift has a modular structure that allows the integration of various functional model components. The first version of the model system includes a newly developed land use change module and modules for crop and grassland productivity, which are based on the ecosystem model DayCent. Furthermore, LandShift is linked to the global hydrological model WaterGAP2 that …
Bayesian Decision Networks - Going Beyond Expert Elicitation For Parameterisation And Evaluation Of Ecological Endpoints., C. A. Pollino, Barry T. Hart
Bayesian Decision Networks - Going Beyond Expert Elicitation For Parameterisation And Evaluation Of Ecological Endpoints., C. A. Pollino, Barry T. Hart
International Congress on Environmental Modelling and Software
Ecological and integrative analyses routinely involve the synthesis of a range of information sources into a single model. Bayesian decision networks (BDN) are increasingly being used for this purpose because they are flexible, transparent and relatively easy to use. Indeed, BDNs offer a scientific and pragmatic approach to improve decision-making in environmental management, directly addressing management needs, while promoting stakeholder participatory processes. However, despite their advantages, many BDNs developed to meet such needs are not being developed or applied to their full potential. The majority of BDNs published to date rely only on expert opinion to parameterise and evaluate ecologically …
Managing For Visual Goals In The Ned-2 Decision Support System For Forests Ecosystems., Donald Nute, Mark Twery, Zhiyuan Cheng, Arlo Lyle, Cy Routh
Managing For Visual Goals In The Ned-2 Decision Support System For Forests Ecosystems., Donald Nute, Mark Twery, Zhiyuan Cheng, Arlo Lyle, Cy Routh
International Congress on Environmental Modelling and Software
NED-2 integrates decision support tools for forested ecosystems developed by the NED-2 team with other third-party decision support tools. NED-2 is goal-driven and is designed to help manage for visual, wildlife, and ecological as well as traditional timber goals. Several tools are included to help manage for visual goals. (1) A knowledge based system can perform analysis of visual goals for the management unit. (2) A report generator incorporates the results of the visual goal analysis into detailed reports in HTML format. (3) If a shape file for the management unit is available, the results can also be displayed using …
Cell-Devs Modeling Of Environmental Applications, Gabriel Wainer
Cell-Devs Modeling Of Environmental Applications, Gabriel Wainer
International Congress on Environmental Modelling and Software
Recently, different research teams used Cellular models for the analysis of environmental systemsusing Cellular models. Some of these techniques are based on Cellular Automata, which have some problemsconstraining its power, usability and feasibility for studying large complex systems. In other cases, the CellularAutomata have been combined with the DEVS (Discrete-Event Systems Specifications) formalism, which requiresexpertise in advanced programming techniques, visualization, distributed computing, etc. Instead, theCell-DEVS formalism and the CD++ toolkit Cell-DEVS simplify the construction of complex cellular modelsby allowing simple and more intuitive model specification. We present the definition of different models, focusingon how to define such applications using Cell-DEVS …
Sada: A Freeware Decision Support Tool Integrating Gis, Sample Design, Spatial Modeling, And Risk Assessment, Robert N. Stewart, S. Tom Purucker
Sada: A Freeware Decision Support Tool Integrating Gis, Sample Design, Spatial Modeling, And Risk Assessment, Robert N. Stewart, S. Tom Purucker
International Congress on Environmental Modelling and Software
Spatial Analysis and Decision Assistance (SADA) is a Windows freeware program that incorporates tools from environmental assessment into an effective problem-solving environment. SADA was developed by the Institute for Environmental Modeling at the University of Tennessee and includes integrated modules for GIS, visualization, geospatial analysis, statistical analysis, human health and ecological risk assessment, cost/benefit analysis, sampling design, and decision support. SADA began in the middle 1990s as a simple tool for integrating human health risk with spatial modeling tools. Since then, SADA has continued as an evolving freeware product targeted to individuals needing the integration or expansion of existing models …
Quasi-2d Approach In Modelling The Transport Of Contaminated Sediments In Floodplains During River Flooding - Model Coupling And Uncertainty Analysis, K. -E Lindenschmidt, J. Rauberg
Quasi-2d Approach In Modelling The Transport Of Contaminated Sediments In Floodplains During River Flooding - Model Coupling And Uncertainty Analysis, K. -E Lindenschmidt, J. Rauberg
International Congress on Environmental Modelling and Software
In flood modelling, many one-dimensional (1D) hydrodynamic and water-quality models are too restricted in capturing the spatial differentiation of processes within the floodplain and two-dimensional (2D) models are too demanding in data requirements and computational resources. The latter is an important consideration when uncertainty analyses using the Monte Carlo technique are to complement the modelling exercises. Hence, we have developed a quasi-2D modelling approach which still calculates the dynamic wave in 1D but the discretisation of the computational units is in 2D, allowing a better spatial representation of the flow and substance transport processes in the floodplain without a large …