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Evaluating Climate Suitability For Agriculture In Switzerland, A. Holzkämper, P. Calanca, J. Fuhrer Jul 2010

Evaluating Climate Suitability For Agriculture In Switzerland, A. Holzkämper, P. Calanca, J. Fuhrer

International Congress on Environmental Modelling and Software

With climate change increased water shortage and extreme weather eventsduring the cropping season may cause more frequent crop loss, yield instability, and makecultivated areas less suitable for traditional crops. In order to develop long-term agriculturalpolicies, planners need to understand the likely impacts of climate change on the climatesuitability for different cultivation types. Agroclimatic indices have great potential tocommunicate the impacts of climate change. However, each metric only represents aspecific aspect of climate that may or may not be relevant for the growth of a certain croptype. To guide planners and policy makers, different indices have to be aggregated in acomprehensible …

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Estimates Of Seasonal Methane Emissions From Paddy-Rice Cropped At Pindamonhangaba Municipality, Brazil, Using Dndc Model, Maria Conceição Peres Young Pessoa, Magda Aparecida De Lima, Omar Vieira Vilella Jul 2010

Estimates Of Seasonal Methane Emissions From Paddy-Rice Cropped At Pindamonhangaba Municipality, Brazil, Using Dndc Model, Maria Conceição Peres Young Pessoa, Magda Aparecida De Lima, Omar Vieira Vilella

International Congress on Environmental Modelling and Software

Agricultural activities have been pointed out as one of anthropogenic sources of greenhouse gas emissions, which influence on climatic changes. Information available at Intergovernmental Panel on Climatic Changes (Ipcc) indicated that methane emissions (CH4) generated during the paddy-rice culture development phases is one of these activities and must be better investigated at field conditions. Computer tools that allow following the space-time dynamic of methane emissions from paddy-rice culture, considering the management involved, should also contribute to identify alternatives in order to minimize the high emission rates. Thereby, the Denitrification-Decomposition model (DnDc) can be used to investigate alternative scenarios in order …

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A Comparison Of Fuzzy, Bayesian And Weighted Average Formulations Of An In-Stream Habitat Suitability Model., C. J. Brookes, Vikas Kumar, S. N. Lane Jul 2010

A Comparison Of Fuzzy, Bayesian And Weighted Average Formulations Of An In-Stream Habitat Suitability Model., C. J. Brookes, Vikas Kumar, S. N. Lane

International Congress on Environmental Modelling and Software

Three variations of a simple in-stream habitat suitability model were implementedand the effect on output for one organism at 22 sites on one short section of a river wasexamined. The model uses only two factors, depth and velocity, to calculate quality and a thirdfactor, width to quantify utility. The implementations were based on 3 multi-criteria evaluationapproaches: Weighted Average, Fuzzy Sets and Bayesian probability. There was broadagreement between the formulations but important differences in detail. The model outputsindicate that uncertainty arising from model formulation is significant and can have a bearingon planning decisions. There is a complex interaction between the formulations …

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Theology And Ecology: Religious Belief And Environmental Stewardship, Gary C. Bryner Jul 2010

Theology And Ecology: Religious Belief And Environmental Stewardship, Gary C. Bryner

BYU Studies

This article explores the potential role religious belief might play in U.S. environmental policy making. Careful environmental stewardship holds a prominent place in Mormon theology as it does among other faiths. It is helpful to know how religious groups are engaged in environmental policy making, the strengths and limitations of these efforts, and the prospects for religious-based contributions to environmental protection policies. The experience of other believers illuminates some of the choices members of The Church of Jesus Christ of Latter-day Saints face when engaging in public debates over environmental policy.

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End Matter, Religious Educator Jul 2010

End Matter, Religious Educator

Religious Educator: Perspectives on the Restored Gospel

No abstract provided.

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Numerical Modeling Of The Salinity Distribution And Environmental Flows Assessment In The Yellow River Estuary, China, T. Sun, Z. F. Yang Jul 2010

Numerical Modeling Of The Salinity Distribution And Environmental Flows Assessment In The Yellow River Estuary, China, T. Sun, Z. F. Yang

International Congress on Environmental Modelling and Software

Predication of environmental flows is a critical issue in water resourcesmanagement integrated with ecological considerations. It is also a complex issue due to therelationship between ecological and hydrological processes with different temporal andspatial scales in estuarine ecosystems. The salinity gradient is a basic characteristic for anestuary ecosystem, which is largely affected by the alteration of freshwater inflows becauseof human activities. In this paper, a numerical model was developed for simulating thesalinity distribution under the action of river discharge and tide current in the Yellow RiverEstuary. Environmental flow requirements were determined for critical periods in theYellow River Estuary after identifying the …

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Exploring Forest Management Practices Using An Agent-Based Model Of Forest Insect Infestations, Liliana Pérez, Suzana Dragicevic Jul 2010

Exploring Forest Management Practices Using An Agent-Based Model Of Forest Insect Infestations, Liliana Pérez, Suzana Dragicevic

International Congress on Environmental Modelling and Software

The forests of British Columbia, Canada have undergone an unprecedented Mountain Pine Beetle, Dendroctonus ponderosae Hopkins, (MPB) infestation that has resulted in extensive mortality of lodgepole pine, Pinus contorta. The objective of this study is to apply the agent-based model (ABM) to simulate the MPB attack behaviour in order to evaluate how different harvesting policies influence spatial characteristics of the forest and spatial propagation of the MPB infestation over time. The first scenario is the no management action with the natural disturbance process leading the changes of the forest ecosystem. The other two scenarios implement sanitation and salvage harvesting methods. …

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Multi-Disciplinary Development Of An Early Warning And Automated Response System (Ewars) For Epidemic Prevention, Ajit N. Babu, Engelbert Niehaus Jul 2010

Multi-Disciplinary Development Of An Early Warning And Automated Response System (Ewars) For Epidemic Prevention, Ajit N. Babu, Engelbert Niehaus

International Congress on Environmental Modelling and Software

It is becoming increasingly clear that changes in the environment can promote growth ofdisease vectors like mosquitoes and rodents as well as rise in water-borne illnesses likecholera and other enteric diseases. Our paper is based on the concept that a multidisciplinaryinformatics scaffold can serve as an Early Warning and Automated Response System(EWARS) for a variety of communicable diseases. It will utilize multiple informationresources including Remote Sensing (RS), Global Positioning Systems (GPS) andGeographic Information Systems (GIS) for exposure assessment (John et al 2004). Earlywarning systems are not new (Witt et al 2009). However, what is novel in the proposal isthe integration …

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An Interdisciplinary Framework For The Development And Analysis Of Crop Models, Sebastien Roux, Myriam Adam, Wery Jacques Jul 2010

An Interdisciplinary Framework For The Development And Analysis Of Crop Models, Sebastien Roux, Myriam Adam, Wery Jacques

International Congress on Environmental Modelling and Software

Development and use of crop models has become an interdisciplinary field with the increase on one hand of the biophysical knowledge and the development of numerous dedicated software platforms on the other hand. This trend calls for formalizing the integration of the disciplinary contributions of scientists having different expertises needed in crop modelling : agronomists, mathematicians, software scientists. We propose an interdisciplinary framework to : (1) describe the model with different expert domain knowledge, (2) identify bridges to help scientists of different domains to work together on the same model, (3) give a methodological basis (engine) for crop model studies. …

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Impacts Of Environmental Factors And Shellfish Practices On The Mont-St-Michel Bay Ecosystem (France). A Modelling Study Involving Scientists And Local Stakeholders., Philippe Cugier, Caroline Struski, Karine Grangere, Michel Blanchard, Katia Frangoudès, Thierry Robin, José Pérez, Rémi Mongruel, Joseph Mazurié, Patrick Le Mao, Guy Fontenelle Jul 2010

Impacts Of Environmental Factors And Shellfish Practices On The Mont-St-Michel Bay Ecosystem (France). A Modelling Study Involving Scientists And Local Stakeholders., Philippe Cugier, Caroline Struski, Karine Grangere, Michel Blanchard, Katia Frangoudès, Thierry Robin, José Pérez, Rémi Mongruel, Joseph Mazurié, Patrick Le Mao, Guy Fontenelle

International Congress on Environmental Modelling and Software

The macro-benthic communities of Mont-Saint-Michel Bay, located in the Norman-Breton Gulf (English Channel) along the French coast, are mainly dominated by filter-feeders which include cultivated species (oysters and mussels). The decline in shellfish farms production and the significant spreading of the invasive slipper-limpet Crepidula fornicata have conducted scientists and stakeholders to undertake a reflexion on the trophic balance between cultivated and wild (native or invasive non-native) filterfeeders. An ecological model of the bay was developed, coupling a 2D hydro-sedimentary model along with biological models for primary production and filter-feeder growth. The objectives of the project were first to provide indicators …

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Validation And Sensitivity Analysis Of Catchment Runoff And Erosion Simulation Technology (Crest): A Gis-Assisted Soil Erosion Model At Watershed Level, Reynaldo L. Lanuza, Eduardo P. Paningbatan Jr Jul 2010

Validation And Sensitivity Analysis Of Catchment Runoff And Erosion Simulation Technology (Crest): A Gis-Assisted Soil Erosion Model At Watershed Level, Reynaldo L. Lanuza, Eduardo P. Paningbatan Jr

International Congress on Environmental Modelling and Software

Most erosion models have been developed based on a plot scale and have limited application to a watershed due to the differences in scale. In order to address this limitation, a GIS-assisted methodology for modeling soil erosion was developed using PCRaster to predict the rate of soil erosion at watershed level and identify the location of erosion prone areas. The GIS-assisted hydrology and erosion models were validated at Tanghaga Watershed using the observed values from previous experiment. The predicted peak rates, Qp, showed a highly significant relationship with the observed Qp, with an r2 value of 0.75. For soil loss …

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Integrated Meta-Modelling For Decision Support In Integrated Catchment Management, Vikas Kumar, A. Holzkämper, D. N. Lerner Jul 2010

Integrated Meta-Modelling For Decision Support In Integrated Catchment Management, Vikas Kumar, A. Holzkämper, D. N. Lerner

International Congress on Environmental Modelling and Software

Developing supporting models for multidisciplinary, uncertain and complex Integrated Catchment Management (ICM) is a highly challenging task. Knowledge from multiple disciplines must be integrated, and the process is compounded by significant uncertainty. The key gap that provides the research context is the need for a holistic modelling framework to support ICM, able to capture system complexities and interrelationships, and identify long-term solutions to catchment management problems. In this paper, we present the feasibility study of a new framework for developing an integrated meta-model for decision-support in ICM. The study undertaken by the Catchment Science Centre at the University of Sheffield …

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Development Of A Land-Use Component For An Integrated Model Of The German Biogas System, A. Schaldach, D. Lapola, U. Jessen, M. Thees, Ruediger Schaldach Jul 2010

Development Of A Land-Use Component For An Integrated Model Of The German Biogas System, A. Schaldach, D. Lapola, U. Jessen, M. Thees, Ruediger Schaldach

International Congress on Environmental Modelling and Software

Germany is one of the biggest producers of biogas in Europe. Biogas can either be combusted in highly efficient combined heat and power units to produce electricity and heat, or upgraded to biomethane for injection into the natural gas grid. As political conditions encourage the installation of new biogas plants, their number and capacity is expected to grow significantly in the next few years. In Germany, energy crops play an important role for biogas production. Due to their relatively low energy content transport distances from the field to the plants are a crucial issue for the efficiency of the biogas …

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Agent Based Modelling Of Caribou Environmental Interactions In The Canadian Arctic, Glen Lesins, Kaz Higuchi Jul 2010

Agent Based Modelling Of Caribou Environmental Interactions In The Canadian Arctic, Glen Lesins, Kaz Higuchi

International Congress on Environmental Modelling and Software

Agent or individual based modelling (IBM) is recognized as an important tool in biological modelling for simulating animal behaviour and interactions with the environment at the level of the individual while maintaining a collective perspective. The method allows rules to be programmed for the interactions between like and unlike species, responses to geographic factors and impacts from human activities. By emphasizing the development of appropriate rules for the individual, one can avoid imposing ad hoc assumptions concerning the population as a whole and instead allow emergent phenomena to unfold at the larger scale. Here we report on preliminary results using …

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Mr Potatohead Framework – A Software Tool For Collaborative Land-Use Change Modeling, Mike Livermore Jul 2010

Mr Potatohead Framework – A Software Tool For Collaborative Land-Use Change Modeling, Mike Livermore

International Congress on Environmental Modelling and Software

Agent-based land-use cover/change models (ABM/LUCC), which can be used for various types of complex human-environment interactions, recently have been gaining popularity. ABM/LUCC models combine a spatial representation of the landscape with key decision-makers (e.g. farmers and institutions) and an environment for interaction. There is inherent complexity in modeling human-environment interactions which need to be assessed at multiple spatial and time scales, and often multiple models are integrated; however, current methods of developing integrated models are often cumbersome and communicating design and results can be a great challenge and would be aided by a common framework in which different models can …

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Evaluation Of The Changed Properties Of Aquatic Animals After Dam Construction Using Ecological Network Analysis, Chen Shaoqing, Liao Xueqin, Yang Jin, Chen Bin Jul 2010

Evaluation Of The Changed Properties Of Aquatic Animals After Dam Construction Using Ecological Network Analysis, Chen Shaoqing, Liao Xueqin, Yang Jin, Chen Bin

International Congress on Environmental Modelling and Software

Dam construction results in variations of hydrology, river morphology and habitat and thebiota associated with the reservoir change significantly compared to the assemblage before damconstruction in order to match these changed environmental conditions. Some attempts so far havebeen made to ascertain the changed properties of aquatilia due to dam construction. Most of them,however, were focused on perturbances to single factors, such as rearing habitats, reproduction andmigration routes, etc. Few have been done on the performance of aquatilia from the whole-ecosystemperspective. Herein, we evaluate the structural properties of aquatic animals and their complexecological relationships within the ecosystem before and after dam …

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Development Of A Modular Environmental Decision Support System For The Integrated Management Of The Urban Wastewater Cycle At River Basin Scale, D. Murlà, A. Monistrol, Manel Poch, D. Sunyer Jul 2010

Development Of A Modular Environmental Decision Support System For The Integrated Management Of The Urban Wastewater Cycle At River Basin Scale, D. Murlà, A. Monistrol, Manel Poch, D. Sunyer

International Congress on Environmental Modelling and Software

Most of Urban Wastewater Systems (UWS) have been managed separately, without considering any interaction between sewer systems, Wastewater Treatment Plants (WWTPs) and the receiving waters. Nowadays, the conventional practice has changed, introducing the integrated management concept into the river basin scale. The goal of the project is to develop a modular Environmental Decision Support System (EDSS) to optimise the integrated management of the UWS based on a rule based system as the reasoning core and a Knowledge Base, easily represented by means of decision trees and fully opened. The EDSS, based upon expert knowledge and simulation results, will allow proposing …

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Feedbacks In Socio-Environmental Land Systems, Joerg A. Priess, Nina Schwarz, Sven Lautenbach Jul 2010

Feedbacks In Socio-Environmental Land Systems, Joerg A. Priess, Nina Schwarz, Sven Lautenbach

International Congress on Environmental Modelling and Software

The dynamics of socio-environmental systems are driven by exogenous forcesand by the interaction of endogenous system components, both within the social and environmentalrealms, as well as between them. In recent years, the number of models andmodelling frameworks explicitly representing feedbacks has increased, especially for modelsof land use systems. Land use changes are on the one hand caused by a complex interactionof human and/or institutional land use demands and the environment, which supportsor limits human use in several aspects. On the other hand, land use changes and theireffects at least partly influence the respective driving forces and future land-use decisions,e.g. by …

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Spatio-Temporal Modelling Of The Spread Of Common Reed On The Finnish Coast, Anas Altartouri, Ari Jolma, Päivi Korpinen Jul 2010

Spatio-Temporal Modelling Of The Spread Of Common Reed On The Finnish Coast, Anas Altartouri, Ari Jolma, Päivi Korpinen

International Congress on Environmental Modelling and Software

The common reed (Phragmites Australis) has overtaken the Finnish coast of theGulf of Finland in many places influencing the coastal ecology and reducing therecreational value of the coast. Our research aims at developing a spatio-temporalsimulation model of the spread of reed. In order to account for the dynamic nature of thespread, a cellular automata model is employed. We investigate in depth the explanatoryvariables and their relevance to the phenomenon. It was found that water depth, proximityto river mouths, and sea openness are significant explanatory variables of the phenomenon.A predictive logistic regression model is suggested to aggregate the explanatory variablesand provide …

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Reasoning About Actions For The Management Of Urban Wastewater Systems Using A Causal Logic, Dario Garcia-Gasull, Juan Carlos Nieves, Ulises Cortés Jul 2010

Reasoning About Actions For The Management Of Urban Wastewater Systems Using A Causal Logic, Dario Garcia-Gasull, Juan Carlos Nieves, Ulises Cortés

International Congress on Environmental Modelling and Software

The management of Urban Wastewater Systems (UWS) is a critical and difficult process. Handling polluted water in UWS requires planning and decision making regarding sectors such as environmental, energetic, industrial, etc. In order to represent all the significant concepts, a powerful and flexible formalism is needed. Nowadays, there are solid approaches based on nonmonotonic reasoning which can capture dynamic domains such UWS. In this paper, we present an implementation of a real UWS in the action language Causal Calculator (CCalc-C+) which displays all the singularities of such domain and within which complex queries can be performed. The nonmonotonic causal theory, …

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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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A Comparison Of Fuzzy, Bayesian And Weighted Average Formulations Of An In-Stream Habitat Suitability Model., C. J. Brookes, Vikas Kumar, S. N. Lane Jul 2010

A Comparison Of Fuzzy, Bayesian And Weighted Average Formulations Of An In-Stream Habitat Suitability Model., C. J. Brookes, Vikas Kumar, S. N. Lane

International Congress on Environmental Modelling and Software

Three variations of a simple in-stream habitat suitability model were implementedand the effect on output for one organism at 22 sites on one short section of a river wasexamined. The model uses only two factors, depth and velocity, to calculate quality and a thirdfactor, width to quantify utility. The implementations were based on 3 multi-criteria evaluationapproaches: Weighted Average, Fuzzy Sets and Bayesian probability. There was broadagreement between the formulations but important differences in detail. The model outputsindicate that uncertainty arising from model formulation is significant and can have a bearingon planning decisions. There is a complex interaction between the formulations …

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Application Of Life Cycle Analysis (Lca) In Evaluating Energy-Consuming Of Integrated Oxidation Ditch (Iod), Xianchun Tan, Junyi Xu, Sheng Wang, C. Y. Miao Jul 2010

Application Of Life Cycle Analysis (Lca) In Evaluating Energy-Consuming Of Integrated Oxidation Ditch (Iod), Xianchun Tan, Junyi Xu, Sheng Wang, C. Y. Miao

International Congress on Environmental Modelling and Software

With the research on some critical technology going deeply, the problem of technology route and project approach for the saving energy and reducing consumption have become the focus of municipal wastewater treatment process. In this article, LCA (Life Cycle Analysis) is applied to identify and compare the energy consumption of each stage of different technologies in municipal wastewater treatment from the view of whole process. This is carried out after reviewing the condition of energy utilizing of typical technologies in China. And some measures are brought forward to improve the efficiency of energy utilizing. Integrated Oxidation Ditch (IOD) is taken …

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Exploring Forest Management Practices Using An Agent-Based Model Of Forest Insect Infestations, Liliana Pérez, Suzana Dragicevic Jul 2010

Exploring Forest Management Practices Using An Agent-Based Model Of Forest Insect Infestations, Liliana Pérez, Suzana Dragicevic

International Congress on Environmental Modelling and Software

The forests of British Columbia, Canada have undergone an unprecedented Mountain Pine Beetle, Dendroctonus ponderosae Hopkins, (MPB) infestation that has resulted in extensive mortality of lodgepole pine, Pinus contorta. The objective of this study is to apply the agent-based model (ABM) to simulate the MPB attack behaviour in order to evaluate how different harvesting policies influence spatial characteristics of the forest and spatial propagation of the MPB infestation over time. The first scenario is the no management action with the natural disturbance process leading the changes of the forest ecosystem. The other two scenarios implement sanitation and salvage harvesting methods. …

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Modelling Connectivity Between Pollutant Source Areas And Streams, S. Moshirvaziri, G. Sheridan, Patrick N. J. Lane, O. Jones Jul 2010

Modelling Connectivity Between Pollutant Source Areas And Streams, S. Moshirvaziri, G. Sheridan, Patrick N. J. Lane, O. Jones

International Congress on Environmental Modelling and Software

The nature of pollutant connectivity between unsealed forest roads and adjacent nearby streams is examined numerically in terms of spatial and temporal patterns of runoff generation, erosion, and sediment transport. In this paper we consider the relative effects of rainfall intensity and duration, surface roughness, infiltration rate, macropore flow and sediment detachment and transport. The objective of the numerical simulation of this hillslope system is to identify the dominant processes and parameters that affect the degree of pollutant connectivity between roads and streams. The St. Venant equations are applied to extract a two-dimensional diffusion wave model with variable conductivity and …

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Dynamics Of Habitat Banking Under Changing Conservation Costs And Habitat Restoration Time Lags, Martin Drechsler, Florian Hartig Jul 2010

Dynamics Of Habitat Banking Under Changing Conservation Costs And Habitat Restoration Time Lags, Martin Drechsler, Florian Hartig

International Congress on Environmental Modelling and Software

Tradable permits are a popular instrument for environmental policy. Classical examples are emission control, but tradable permit systems are recently also promoted and applied to the conservation of biodiversity. This raises a number of challenges. One problem is that habitat turnover (the destruction of habitats and restoration elsewhere) is harmful to many species, even if the total amount of habitat is constant. Another problem is that the restoration of habitats often takes time, leading to time lags between the beginning of restoration activities and the time when the restored habitat is available for trading. It is therefore important to understand …

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Providing Intelligent Decision Support Systems With Flexible Data-Intensive Case-Based Reasoning, Beatriz Sevilla Villanueva, Miquel Sànchez-Marrè Jul 2010

Providing Intelligent Decision Support Systems With Flexible Data-Intensive Case-Based Reasoning, Beatriz Sevilla Villanueva, Miquel Sànchez-Marrè

International Congress on Environmental Modelling and Software

In this paper we present a flexible CBR shell for Data-Intensive Case-Based Reasoning Systems which is fully integrated in an Intelligent Data Analysis Tool entitled GESCONDA. The main subgoal of the developed tool is to create a CBR Shell where no fixed domain exists and where letting the expert/user creates (models) his/her own domain. From an abstract point of view, the definition of the CBR can be seen as a methodology composed by four phases and each phase offers different ways to be solved. Then, since the CBR shell is integrated in GESCONDA, it inherits all its functionalities which cover …

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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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Validation And Sensitivity Analysis Of Catchment Runoff And Erosion Simulation Technology (Crest): A Gis-Assisted Soil Erosion Model At Watershed Level, Reynaldo L. Lanuza, Eduardo P. Paningbatan Jr Jul 2010

Validation And Sensitivity Analysis Of Catchment Runoff And Erosion Simulation Technology (Crest): A Gis-Assisted Soil Erosion Model At Watershed Level, Reynaldo L. Lanuza, Eduardo P. Paningbatan Jr

International Congress on Environmental Modelling and Software

Most erosion models have been developed based on a plot scale and have limited application to a watershed due to the differences in scale. In order to address this limitation, a GIS-assisted methodology for modeling soil erosion was developed using PCRaster to predict the rate of soil erosion at watershed level and identify the location of erosion prone areas. The GIS-assisted hydrology and erosion models were validated at Tanghaga Watershed using the observed values from previous experiment. The predicted peak rates, Qp, showed a highly significant relationship with the observed Qp, with an r2 value of 0.75. For soil loss …

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Modelling Flow And Concentration Field In Rectangular Water Tanks, F. Javier Martínez-Solano, Pedro L. Iglesias Rey, C. Gualtieri, P. Amparo López-Jiménez Jul 2010

Modelling Flow And Concentration Field In Rectangular Water Tanks, F. Javier Martínez-Solano, Pedro L. Iglesias Rey, C. Gualtieri, P. Amparo López-Jiménez

International Congress on Environmental Modelling and Software

Water storage tanks are usually designed with two objectives, i.e. to provide a specified maximum storage volume and to fix a certain total head over the water supply network. Only more recently, some attention has been paid to the water quality inside the storage tank since this can significantly affect the quality in the distribution systems. Sometimes conceptual models were proposed in the literature, but computational fluid dynamics (CFD) methods can be considered as the best analysis and predictive tool in storage tanks water quality studies. In this paper, FLUENT®, a commercial CFD code, was applied to model flow and …

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