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Vadose-Zone Leaching And Saturated-Zone Mixing Model In Heterogeneous Layers, Samuel S. Lee
Vadose-Zone Leaching And Saturated-Zone Mixing Model In Heterogeneous Layers, Samuel S. Lee
International Congress on Environmental Modelling and Software
A screening level model was developed for simulation of pollutant migration through the vadose-zone and subsequent mixing within the saturated-zone. This one-dimensional finite difference model simulates the transport processes of liquid-phase advection, liquid- and vapor-phase dispersion, sorption, and decay of the contaminant. Using a simple mass-balance technique, the saturated-zone module estimates mixing of the vadose-zone leachate with groundwater. The model can be a useful tool in making preliminary assessments of the potential impacts of contaminants in the subsurface. The model can handle vertical heterogeneity of the soil columns and non-uniform initial contaminant concentration. The model was verified by comparing to …
Lake Erie Hypoxia Simulations With Elcom-Caedym, Luis F. León, Ralph E. H. Smith, Jose R. Romero, Robert E. Hecky
Lake Erie Hypoxia Simulations With Elcom-Caedym, Luis F. León, Ralph E. H. Smith, Jose R. Romero, Robert E. Hecky
International Congress on Environmental Modelling and Software
This paper presents the simulation of the dissolved oxygen (DO) dynamics in the central basin of Lake Erie using a three-dimensional hydrodynamic model (ELCOM) coupled with an aquatic ecological model (CAEDYM). The objective was to simulate the recurrent hypoxic conditions that occur in the shallow hypolimnion of the central basin of the lake after the onset of stratification. In early spring, oxygen concentrations are relatively high, but by late summer, large areas in the central basin of Lake Erie are effectively hypoxic (andlt;2 mg l-1). This numerical modeling study successfully reproduced horizontal variability and vertical decay of dissolved oxygen during …
Application Of Mesocasimir: Assessment Of Baetis Rhodani Habitat Suitability, A. M. Mouton, M. Schneider, I. Kopecki, Peter L. M. Goethals, N. De Pauw
Application Of Mesocasimir: Assessment Of Baetis Rhodani Habitat Suitability, A. M. Mouton, M. Schneider, I. Kopecki, Peter L. M. Goethals, N. De Pauw
International Congress on Environmental Modelling and Software
The assessment of the ecological status of running waters at a mesohabitat scale is commonly based on fish. Nevertheless, due to their strong dependence on a good physical and chemical habitat, macroinvertebrate species can also be used for this assessment. A new approach is presented by applying the MesoCASiMiR module of the CASiMiR modeling system. In this way, the habitat suitability for the mayfly Baetis rhodani was modeled at a mesohabitat scale in the river Zwalm (Flanders, Belgium). The model inference system was based on fuzzy logic. Fuzzy variable sets and rules were derived from expert knowledge and from a …
Future Solutions: Integrated Models For Sea And Other Land-Use Decision-Making., Ruth Waldick, David Brunckhorst, Ian Campbelld, Jeff Carmichael
Future Solutions: Integrated Models For Sea And Other Land-Use Decision-Making., Ruth Waldick, David Brunckhorst, Ian Campbelld, Jeff Carmichael
International Congress on Environmental Modelling and Software
Since policies should reflect societal values and aspirations, decision-making would benefit from tools that allow consideration of all entities that contribute to, or are affected by decisions. At a minimum, policy should include those key economic, social, and environmental activities taking place within a geophysically relevant area. The barriers that impede the development of integrated modeling programs that try to include many of the processes and outcomes of interest in studying a problem represent a series of common challenges associated with most integrative and cross-jurisdictional projects. Although computer-based modeling and scenario tools can inform the decision-making process, the scope of …
Interleaving Growth And Regeneration Models In The Ned-2 Decision Support System For Forest Ecosystems., Donald Nute, Mark Twery, Julian Bishop, Zhiyuan Cheng, David Bucugnani, Walter D. Potter, David Loftis, Scott Thomasma, Peter Knopp
Interleaving Growth And Regeneration Models In The Ned-2 Decision Support System For Forest Ecosystems., Donald Nute, Mark Twery, Julian Bishop, Zhiyuan Cheng, David Bucugnani, Walter D. Potter, David Loftis, Scott Thomasma, Peter Knopp
International Congress on Environmental Modelling and Software
NED-2 is a goal-driven system designed to help manage timber, wildlife, visual, and ecological goals for a forested ecosystem. The basic approach of the decision process modeled by NED-2 is to develop alternative management plans for the stands in a management unit, to simulate these plans over time, and then to analyze the results of the simulation to see how well the management goals are achieved by the alternative plans. The basic simulation tool used in the system is the USDA Forest Service Forest Vegetation Simulator (FVS.) FVS provides a regeneration component, but a need was recognized for making available …
Application Of An Artificial Neural Network For Analysis Of Subsurface Contamination At The Schuyler Falls Landfill, Ny, Lance E. Besaw, Donna M. Rizzo, P. J. Mouser
Application Of An Artificial Neural Network For Analysis Of Subsurface Contamination At The Schuyler Falls Landfill, Ny, Lance E. Besaw, Donna M. Rizzo, P. J. Mouser
International Congress on Environmental Modelling and Software
Current subsurface site characterization, plume delineation, remediation designs and monitoring network designs that rely on a limited, albeit large, number of sparsely collected data, tend to be expensive, cumbersome and frequently inadequate for solving multi-objective, long-term environmental management problems. We present a subsurface characterization methodology that integrates multiple types of data using a modified counterpropagation artificial neural network (ANN) to provide parameter estimates and delineate groundwater contamination at a leaking landfill. Apparent conductivity survey data and hydrochemistry data (i.e. heavy metals, BOD5,20, chloride concentration, etc.) are used to estimate the extent of subsurface contamination at the Schuyler Falls Landfill, located …
Dealing With Uncertainty And Sensitivity Issues In Process-Based Models Of Carbon And Nitrogen Cycles In Northern Forest Ecosystems, G. R. Larocque, J. S. Bhatti, A. M. Gordon, N. Luckai, Jinxun Liu, Shuguang Liu, P. A. Arp, C. -F Zhang, Alexander Komarov, Pavel Grabarnik, M. Wattenbach, C. Peng, Jianfeng Sun, Thomas White
Dealing With Uncertainty And Sensitivity Issues In Process-Based Models Of Carbon And Nitrogen Cycles In Northern Forest Ecosystems, G. R. Larocque, J. S. Bhatti, A. M. Gordon, N. Luckai, Jinxun Liu, Shuguang Liu, P. A. Arp, C. -F Zhang, Alexander Komarov, Pavel Grabarnik, M. Wattenbach, C. Peng, Jianfeng Sun, Thomas White
International Congress on Environmental Modelling and Software
Many process-based models on carbon (C) and nitrogen (N) cycles have been developed for northern forest ecosystems. These models are widely used to evaluate the long-term decisions in forest management dealing with effects like particulate pollution, productivity and climate change. Regarding climate change, one of the key questions that have sensitive political implications is whether northern forests will sequester atmospheric C or not. Whilst many process-based models have been tested for accuracy by evaluating or validating against observed data, few have dealt with the complexity of the incorporated procedures to estimate uncertainties associated with model predictions or the sensitivity of …
Using Optimization For Environmental Simulation Model Calibration Uncertainty Analysis, B. A. Tolson, C. A. Shoemaker
Using Optimization For Environmental Simulation Model Calibration Uncertainty Analysis, B. A. Tolson, C. A. Shoemaker
International Congress on Environmental Modelling and Software
Environmental simulation models areapproximations of reality, and are therefore allsubject to varying degrees of uncertainty. Ingeneral, uncertainty sources in environmentalmodeling include parameter, data and modelstructure. When the uncertainty of these modelinputs are quantified in terms of probabilitydistributions, a traditional Monte Carlopropagation of input uncertainty can be performed.However, this traditional approach becomes muchmore complicated when model calibration data isconsidered because the random input sets sampledfrom the joint parameter and input distributionsmust also be deemed to produce reasonablepredictions of the available measured calibrationdata. Two types of methods that were developedto cope with this complication are the GeneralizedLikelihood Uncertainty Estimation or GLUEmethodology (Beven …
Predicting Impacts Of Water Management In Coastal Zones By Hydraulic And Salinity Modeling, C. T. Hoanh, N. D. Phong, J. W. Gowing, T. P. Tuong, N. X. Hien, N. D. Dat
Predicting Impacts Of Water Management In Coastal Zones By Hydraulic And Salinity Modeling, C. T. Hoanh, N. D. Phong, J. W. Gowing, T. P. Tuong, N. X. Hien, N. D. Dat
International Congress on Environmental Modelling and Software
Tidal effects and salinity intrusion are two defining characteristics of coastal zones. The firstcauses complex variations of water level and unsteady flows in the river and canal network. The second is aconstraint to agriculture and freshwater fishery, but provides suitable conditions for brackish wateraquaculture. These phenomena bring about conflicts in the development of agriculture, fishery andaquaculture due to different requirements of water quality. Hydraulic and salinity modeling have beendeveloped and applied to simulate tidal propagation and salinity intrusion, and to analyze the effects of watermanagement on hydrological and salinity conditions that control land use in the coastal zones. This paperpresents …
State-Parameter Estimation Of Ecosystem Models Using A Smoothed Ensemble Kalman Filter, M. Chen, Shuguang Liu, Larry L. Tieszen
State-Parameter Estimation Of Ecosystem Models Using A Smoothed Ensemble Kalman Filter, M. Chen, Shuguang Liu, Larry L. Tieszen
International Congress on Environmental Modelling and Software
Much of the effort in data assimilation methods for carbon dynamics analysis has focused on estimating optimal values for either model parameters or state variables. The main weakness of estimating parameter values alone (i.e., without considering state variables) is that all errors from input, output, and model structure are attributed to model parameter uncertainties. On the other hand, the accuracy of estimating state variables may be reduced if the temporal evolution of parameter values is not incorporated. This research develops a smoothed ensemble Kalman filter (SEnKF) to estimate simultaneously the system states and model parameters of an eddy flux partition …
Non-Linear, Multivariate Forecasting Of Hydrologic And Anthropogenic Responses To Meteorological Forcing, Edwin Roehl, Terry Murray
Non-Linear, Multivariate Forecasting Of Hydrologic And Anthropogenic Responses To Meteorological Forcing, Edwin Roehl, Terry Murray
International Congress on Environmental Modelling and Software
Managers and users of natural resources often face two challenging problems. One is forecasting future natural system conditions for optimal resource allocation. Here, the natural system is comprised of the weather and a dependant hydrologic system that contains a water resource. The second problem is forecasting the behavior of a combined natural and man-made system, which also includes anthropogenic resource consumers. Even though detailed meteorological forecasting over weeks and months is impractical, hydrologic behaviors such as groundwater cycling can transpire over months and years. Alternatively, man-made systems exhibit behaviors that both lag and lead causal forcing, e.g., seasonal weather changes. …
Tools Supporting Environmental Management And Policy - Epistemic And Practical Limitations, Patrick A. Wäger
Tools Supporting Environmental Management And Policy - Epistemic And Practical Limitations, Patrick A. Wäger
International Congress on Environmental Modelling and Software
Integrated, computer-based models are intended to handle complex issues. However, in policy-making and environmental management, their application is not always successful if compared to claims made about their usefulness. This raises some questions that could be discussed within the Workshop W6 of 'Developing tools to support environmental management and policy' of iEMSs 2006: Which are typical user expectations towards computer-based models designed to support policy-making and environmental management? Are such models seen as epistemic tools helping to gain knowledge about the structure of complex socio-environmental issues (through modeling), or are they practical tools allowing to learn how systems react on …
A Framework For Spatio-Temporal Data Analysis And Hypothesis Exploration, Alexander Campbell, Binh Pham, Yu-Chu Tian
A Framework For Spatio-Temporal Data Analysis And Hypothesis Exploration, Alexander Campbell, Binh Pham, Yu-Chu Tian
International Congress on Environmental Modelling and Software
We present a general framework for pattern discovery and hypothesis exploration in spatio-temporaldata sets that is based on delay-embedding. This is a remarkable method of nonlinear time-series analysis thatallows the full phase-space behaviour of a system to be reconstructed from only a single observable (accessiblevariable). Recent extensions to the theory that focus on a probabilistic interpretation extend its scope and allowpractical application to noisy, uncertain and high-dimensional systems. Our framework uses these extensions toaid alignment of spatio-temporal sub-models (hypotheses) to empirical data - for example, satellite images plusremote-sensing - and to explore behaviours consistent with this alignment. The novel aspect …
Ranking Regions Using Cluster Analysis, Hasse Diagram Technique And Topology, Guillermo Restrepo, Rainer Brüggemann
Ranking Regions Using Cluster Analysis, Hasse Diagram Technique And Topology, Guillermo Restrepo, Rainer Brüggemann
International Congress on Environmental Modelling and Software
We developed the theoretical background of the application of Hierarchical Cluster Analysis HCA to the improvement of the understanding of Hasse Diagrams coming from the ranking process developed for the application of the Hasse Diagram Technique HDT. The use of HCA is based on the idea of the reduction of the number of elements considered in a poset (partially ordered set) by the selection of representatives from the original set to rank. We showed that the clusters arisen from HCA can be interpreted as similarity classes where one of its members (the nearest to the centre of the cluster) can …
On-Line Climate Model Simulation Of The Global Carbon Cycle And Verification Using The In Situ Observation Data, K. Mabuchi, H. Kida
On-Line Climate Model Simulation Of The Global Carbon Cycle And Verification Using The In Situ Observation Data, K. Mabuchi, H. Kida
International Congress on Environmental Modelling and Software
Using a global climate model that includes a new land surface ecosystem model, a numerical simulation under conditions of the actual vegetation was performed. The values of atmospheric carbon dioxide concentration calculated by the model were verified using the in situ observation data. Concerning the seasonal cycle patterns in the Northern Hemisphere, the model could successfully reproduce the features of the seasonal cycle patterns of the observed data. Also in the equatorial zone and in the low latitudinal zone in the Southern Hemisphere, the model could generally reproduce the features of the seasonal cycles of the observed data. In the …
Structure - Fate - Relationships Of Organic Chemicals, Rainer Brüggemann, Guillermo Restrepo, Kristina Voigt
Structure - Fate - Relationships Of Organic Chemicals, Rainer Brüggemann, Guillermo Restrepo, Kristina Voigt
International Congress on Environmental Modelling and Software
The evaluation of the potential risk of chemicals receives again a lot of interest due to the renewed chemicals’ policy in the EU. The model package E4CHEM (Exposure Estimation for Potentially Ecotoxic Environmental Chemicals), already developed 1984-1992, is presented in this paper. This is a model which on the one side needs less information or input parameters as the often applied EUSES (European Union System for the Evaluation of Substances) and on the other side provides modules, like EXWAT (Model for the behaviour of the chemical in rivers)) and DTEST (Automatic Data Estimation), which as such are not contained in …
Modelling Support To Improve The Quality Of Environmental Studies, Huub Scholten
Modelling Support To Improve The Quality Of Environmental Studies, Huub Scholten
International Congress on Environmental Modelling and Software
Sound decisions in environmental management are often based on modelling, performed by teams consisting of team members with multidisciplinary backgrounds and solving multidisciplinary problems. Modelling in itself is a risky activity, in which many things can go wrong, including miscommunication within the team and between the team and the problem owner, malpractice, lack of process knowledge and a lack of documentation. This kind of problems makes modelling an obscure and arbitrary practice. The multidisciplinary character enhances the problem-solving scope of model studies, but does further increase the problems. Projects that use methods and tools for multidisciplinary model-based problem solving should …
Taking End-Users Into Account - Reshaping The Environmental Decision Support Research Agenda, Brian Mcintosh
Taking End-Users Into Account - Reshaping The Environmental Decision Support Research Agenda, Brian Mcintosh
International Congress on Environmental Modelling and Software
There is a clear need for the environmental modelling and decision support research community to become more sensitive to the needs and working practicies of potential 'end-user' organisations. One aspect of becoming more sensitive will be making more explicit our own reasons for developing a model or decision support tool (DST) in the first place. Are we trying to (i) develop tools to be used by researchers with results used by external organisations, or to; (ii) develop tools for use directly by external organisations to support current actions, or are we trying to; (iii) develop tools for use directly by …
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 …
Impacts Of Agriculture And Dairy Farming On Groundwater Quality: An Optimization Problem, Tomaz Dentinho, R. Minciardi, M. Robba, Roberto Sacile, V. Silva
Impacts Of Agriculture And Dairy Farming On Groundwater Quality: An Optimization Problem, Tomaz Dentinho, R. Minciardi, M. Robba, Roberto Sacile, V. Silva
International Congress on Environmental Modelling and Software
A decision model for groundwater quality preservation in areas affected by intensive agriculture and dairy farming, with specific reference to the Azores islands, is presented. In these islands, the exigency to find appropriate instruments to support decisions in Integrated Water Management (IWM) is particularly felt because the increase of tourism and the dairy farming have increased water demands and depletion of water quality. An optimization problem, in terms of decision variables, objectives, and constraints is formalized. The physical/chemical/ecological models are embedded as constraints in the decision model. Specifically, four types of models (hydraulic model, chemical model, agricultural model, and dairy …
Bridging The Gaps Between Design And Use: Developing Appropriate Tools For Environmental Management And Policy, Brian Mcintosh, Alexey Voinov, Court Smith, Carlo Giupponi
Bridging The Gaps Between Design And Use: Developing Appropriate Tools For Environmental Management And Policy, Brian Mcintosh, Alexey Voinov, Court Smith, Carlo Giupponi
International Congress on Environmental Modelling and Software
Integrated assessment models, decision support systems (DSS) and Geographic Information Systems (GIS) are examples of a growing number of computer-based tools designed to provide scientific decision and information support to people within environmental management and policy organizations. It is recognized that end-user organizations are often not as receptive to using such tools as desired but that little research has been done to uncover and understand the reasons why. As part of the process to understand what tools are used and why, and conversely what tools are not used and why, this paper presents some views on the issues involved. No …
Decision Support System For The Assessment And Evaluation Of Ecological Impacts On Aquatic Ecosystems: Objectives And Framework, Paola Agostini, Elena Semenzin, A. Critto, Christian Micheletti, Paulo Nunes, Andrea Ghermandi, Stefania Gottardo, S. Giove, Dick De Zwart, Werner Brack, Antonio Marcomini
Decision Support System For The Assessment And Evaluation Of Ecological Impacts On Aquatic Ecosystems: Objectives And Framework, Paola Agostini, Elena Semenzin, A. Critto, Christian Micheletti, Paulo Nunes, Andrea Ghermandi, Stefania Gottardo, S. Giove, Dick De Zwart, Werner Brack, Antonio Marcomini
International Congress on Environmental Modelling and Software
The EU Water Framework Directive (WFD), establishing stringent quality objectives for European basins in the next years, prompts for the development of new tools to evaluate and improve the ecological status over European rivers. The present paper will provide an overview of the main activities carried out in the DECIS subproject within MODELKEY, an European research project, funded by the European Commission, aimed to contribute to the assessment, understanding and prediction of the impacts of environmental toxicants on biodiversity in aquatic ecosystems. The main aim of DECIS is to develop a Decision Support System (DSS) that includes all project deliverables …
An Agent-Based Simulation Tool For Modelling Sustainable Logistics Systems, Nicolas Knaak, Sven Kruse, Bernd Page
An Agent-Based Simulation Tool For Modelling Sustainable Logistics Systems, Nicolas Knaak, Sven Kruse, Bernd Page
International Congress on Environmental Modelling and Software
Courier services form an important sector of urban freight traffic; leading to a daily volume of traffic that isproblematic in economic and ecologic respects. New logistic concepts for reducing costs, distances and emissionscould improve this situation by increased application of bicycle couriers and bundling of consignments.In this paper we summarise our previous work on the multi-agent-based simulation of alternative logistic conceptsfor city courier services. We discuss models of different organisation forms as well as the tools appliedto their analysis. Since the logistic strategies analysed so far could not display the expected economic andecologic benefits, a new concept named Fixed Exchange …
Neural Identification Of Fuzzy Anomalies In Pressurized Water Systems, Joaquín Izquierdo, R. Pérez, P. A. López, P. L. Iglesias
Neural Identification Of Fuzzy Anomalies In Pressurized Water Systems, Joaquín Izquierdo, R. Pérez, P. A. López, P. L. Iglesias
International Congress on Environmental Modelling and Software
The objective of a Water Supply System (WSS) is to convey treated water to consumers through a pressurized network of pipes. A number of meters and gauges are used to take continuous or periodic measurements that are sent via a telemetry system to the control and operation centre and used to monitor the network. Using this typically limited number of measures together with demand predictions the state of the system must be assessed. Suitable state estimation is of paramount importance in diagnosing leaks and other anomalies in WSS. But this task can be really cumbersome, if not unattainable, for human …
Spatial Estimations Of Air Pollution In Urban Areas By Lidar Measurements, L. Matejicek
Spatial Estimations Of Air Pollution In Urban Areas By Lidar Measurements, L. Matejicek
International Congress on Environmental Modelling and Software
Spatial analysis and visualization of data focused on air pollution in urban areas can be more efficiently explored by geographic information systems (GISs). Data originating from direct monitoring, mathematical modelling and physical simulation in wind tunnels are represented by a wide range of data formats that, together with spatial objects on the surface of studied areas, form heterogenic structures. Thus, to solve spatio-temporal analysis and numeric models, a complex computer system is needed to manage the data and a number of user oriented procedures. In the case of this contribution, a GIS project is developed to examine the GIS abilities …
Incorporating Qualitative Indicators To Support River Managers; Application Of Fuzzy Sets, J. A. E. B. Janssen, Jean-Luc De Kok, A. Y. Hoekstra, R. M. J. Schielen
Incorporating Qualitative Indicators To Support River Managers; Application Of Fuzzy Sets, J. A. E. B. Janssen, Jean-Luc De Kok, A. Y. Hoekstra, R. M. J. Schielen
International Congress on Environmental Modelling and Software
In evaluation of river management strategies it is generally difficult to deal with the loosely structured and uncertain information at hand. Due to the increasing number of interests and objectives involved in river management it becomes more important to find a way to deal with such information. This paper explores to what extent fuzzy set theory can help in the modelling of relations between river management measures and their effects. The authors conclude that fuzzy logic can provide a valuable contribution because of the relative transparency of the method, the possibility to include qualitative knowledge and the incorporation of uncertainty. …
Weap Water Evaluation And Planning System, Jack Sieber
Weap Water Evaluation And Planning System, Jack Sieber
International Congress on Environmental Modelling and Software
WEAP is a microcomputer tool for integrated water resources planning. It provides a comprehensive, flexible and user-friendly framework for policy analysis. A growing number of water professionals are finding WEAP to be a useful addition to their toolbox of models, databases, spreadsheets and other software. This introduction summarizes WEAPΥs purpose, approach and structure. A detailed technical description is available in a separate publication, the WEAP User Guide.
Landscape Modeling And Spatial Optimization Of Management Practices To Restore Water Quality In The St. Albans Bay Watershed, Vermont, Erica Gaddis, Alexey Voinov
Landscape Modeling And Spatial Optimization Of Management Practices To Restore Water Quality In The St. Albans Bay Watershed, Vermont, Erica Gaddis, Alexey Voinov
International Congress on Environmental Modelling and Software
Diffuse (non-point source) pollution from urban stormwater and agricultural runoff are among the leading causes of water pollution in the United States. Currently, most management plans that address diffuse pollution are driven by dissociated economic, political and ecological interests that are difficult to reconcile. Integrated watershed management aims to protect and improve water resources while considering economic and social concerns in the community. Participatory environmental management requires tools, such as landscape models, that can be used to visualize and evaluate the possible outcomes of various management strategies. The overall objective of this project is to develop and implement a framework …
Watershed Health Assessment Tools-Investigating Fisheries (What-If): A Modeling Toolkit For Watershed And Fisheries Management., Brenda Rashleigh, Craig Barber, Mike Cyterski, John Johnston, Yusuf Mohamoud, Rajbir Parmar
Watershed Health Assessment Tools-Investigating Fisheries (What-If): A Modeling Toolkit For Watershed And Fisheries Management., Brenda Rashleigh, Craig Barber, Mike Cyterski, John Johnston, Yusuf Mohamoud, Rajbir Parmar
International Congress on Environmental Modelling and Software
The Watershed Health Assessment Tools-Investigating Fisheries (WHAT-IF) is a decision-analysis modeling toolkit for personal computers that supports watershed and fisheries management. The WHAT-IF toolkit includes a relational database, help-system functions and documentation, and multiple statistical and simulation modeling tools. The tools consist of a hydrologic and stream geometry calculator, a fish assemblage predictor, a fish habitat suitability calculator, and a process-based model to predict biomass dynamics of stream biota (the BASS model). The tools can be used to assess conditions and associated stressors in aquatic ecosystems, to examine causes of impairment, and to forecast ecological outcomes of habitat alterations and …
Data Mining Approaches To Explaining Aerosol Formation, Saara Hyvonen, Heikki Junninen, Lauri Laakso, Miikka Dal Maso, Tiia Gronholm, Boris Bonn, Petri Keronen, Pasi Aalto, Veijo Hiltunen, Toivo Pohja, Samuli Launiainen, Pertti Hari, Heikki Mannila, H.C. Hansoon, M. Kulmala
Data Mining Approaches To Explaining Aerosol Formation, Saara Hyvonen, Heikki Junninen, Lauri Laakso, Miikka Dal Maso, Tiia Gronholm, Boris Bonn, Petri Keronen, Pasi Aalto, Veijo Hiltunen, Toivo Pohja, Samuli Launiainen, Pertti Hari, Heikki Mannila, H.C. Hansoon, M. Kulmala
International Congress on Environmental Modelling and Software
Atmospheric aerosol particle formation is frequently observed in various environments. Yet, despite numerous studies, processes behind these so called nucleation events remain unclear. In this work we describe the use of data mining techniques to detect factors influencing particle formation. These techniques are applied to a dataset of eight years of 80 variables collected at the boreal forest station (SMEAR II) in Southern Finland, including air pollutant, weather, gas and particle measurements. In a previous study classification methods have been used together with feature selection in order to understand what causes nucleation. Each day was classified as an event day, …