Relevant bibliographies by topics / FREEWAT

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'FREEWAT'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 February 2022

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Journal articles on the topic "FREEWAT"

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De Filippis, Giovanna, Christos Pouliaris, Daniel Kahuda, Teodora Vasile, Valentina Manea, Florian Zaun, Björn Panteleit, et al. "Spatial Data Management and Numerical Modelling: Demonstrating the Application of the QGIS-Integrated FREEWAT Platform at 13 Case Studies for Tackling Groundwater Resource Management." Water 12, no. 1 (December 20, 2019): 41. http://dx.doi.org/10.3390/w12010041.

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Because of the spatial nature of groundwater-related data and their time component, effective groundwater management requires the application of methods pertaining to the Information and Communication Technologies sector, such as spatial data management and distributed numerical modelling. The objective of this paper is to demonstrate the effectiveness of the QGIS-integrated FREEWAT platform and an approach combining spatial data management and numerical models to target groundwater management issues. FREEWAT is a free and open source platform integrated in a Geographic Information System environment and embedding tools for pre- and post-processing of spatial data and integrating numerical codes for the simulation of the hydrological cycle, with a main focus on groundwater. To this aim, this paper briefly presents the FREEWAT platform, introduces the FREEWAT approach, and showcases 13 case studies in European and non-European countries where the FREEWAT platform was applied. Application of the FREEWAT platform to real-world case studies is presented for targeting management of coastal aquifers, ground- and surface-water interaction, climate change impacts, management of transboundary aquifers, rural water management and protection of groundwater-dependent ecosystems. In this sense, compared to other existing software suites, FREEWAT allows data analysis and visualization to accomplish each step of the modelling workflow, i.e., from data analytics, to conceptual model definition, to numerical modelling and reporting of results. The presented experiences demonstrate that improved access to data and the portability of models and models’ results can help to promote water sustainability from the local- to the basin-scale. Furthermore, FREEWAT may represent a valuable tool to target the objective of increasing the capabilities of public authorities and private companies to manage groundwater resources by means of up-to-date, robust, well-documented and reliable software, without entailing the need of costly licensing, nowadays seldom affordable by public water authorities. Based on the strengths highlighted, the FREEWAT platform is a powerful tool for groundwater resources management, and for data collection, sharing, implementation and comparison of scenarios, for supporting planning and decision-making.
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Koltsida, Evgenia, and Andreas Kallioras. "Groundwater flow simulation through the application of the FREEWAT modeling platform." Journal of Hydroinformatics 21, no. 5 (July 10, 2019): 812–33. http://dx.doi.org/10.2166/hydro.2019.040.

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Abstract FREEWAT is a free and open source QGIS-integrated platform, developed to simulate several hydrological processes by combining the capabilities of geographic information system (GIS) for geo-processing and post-processing tools with several codes of the well-known USGS MODFLOW ‘family’. FREEWAT platform was applied for the groundwater flow simulation of a coastal aquifer system, located in northern Greece. The simulation was conducted using the MODFLOW_2005 code, the Observation Analysis Tool (a FREEWAT module facilitating the integration of time series observations into modeling), while the UCODE_2014 code was used as the main module for the sensitivity analysis and parameter estimation. The statistics used include composite scaled sensitivities, parameter correlation coefficients, and leverage. The simulation of the investigated aquifer system was found to be satisfactory, indicating that the simulated level values were slightly greater than the observed values after the optimization.
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Grodzynskyi, M. D. "INTERNATIONAL PROJECT FREEWAT ON PLANNING AND MANAGEMENT OF WATER RESOURCES: OBJECTIVES AND IMPLEMENTATION PROCESS." Ukrainian Geographical Journal 2016, no. 4 (November 1, 2016): 17–21. http://dx.doi.org/10.15407/ugz2016.04.017.

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De Filippis, Giovanna, Laura Ercoli, and Rudy Rossetto. "A Spatially Distributed, Physically-Based Modeling Approach for Estimating Agricultural Nitrate Leaching to Groundwater." Hydrology 8, no. 1 (January 11, 2021): 8. http://dx.doi.org/10.3390/hydrology8010008.

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Nitrogen-nitrate, while being fundamental for crop production, is of particular concern in the agricultural sector, as it can easily leach to the water table, worsening groundwater quality. Numerical models and Geographic Information System may support the estimation of nitrate leaching rates in space and time, to support sustainable agricultural management practices. In this paper, we present a module for the simulation of the processes involved in the nitrogen cycle in the unsaturated zone, including nitrate leaching. This module was developed taking steps from the ANIMO and EPIC model frameworks and coupled to the hydrological models integrated within the FREEWAT platform. As such, the nitrogen cycle module was then included in the FREEWAT platform. The developed module and the coupling approach were tested using a simple synthetic application, where we simulated nitrate leaching through the unsaturated zone for a sunflower crop irrigated district during a dry year. The results of the simulation allow the estimation of daily nitrate concentration values at the water table. These spatially distributed values may then be further used as input concentration in models for simulating solute transport in aquifers.
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Foglia, Laura, Iacopo Borsi, Steffen Mehl, Giovanna De Filippis, Massimiliano Cannata, Enric Vasquez-Suñe, Rotman Criollo, and Rudy Rossetto. "FREEWAT, a Free and Open Source, GIS-Integrated, Hydrological Modeling Platform." Groundwater 56, no. 4 (March 31, 2018): 521–23. http://dx.doi.org/10.1111/gwat.12654.

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Rossetto, Rudy, Iacopo Borsi, and Laura Foglia. "FREEWAT: FREE and open source software tools for WATer resource management." Rendiconti online della Società Geologica Italiana 35 (April 2015): 252–55. http://dx.doi.org/10.3301/rol.2015.113.

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De Filippis, Giovanna, Iacopo Borsi, Laura Foglia, Massimiliano Cannata, Violeta Velasco Mansilla, Enric Vasquez-Suñe, Matteo Matteo Ghetta, and Rudy Rossetto. "Software tools for sustainable water resources management: the GIS-integrated FREEWAT platform." Rendiconti Online della Società Geologica Italiana 42 (March 2017): 59–61. http://dx.doi.org/10.3301/rol.2017.14.

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Cannata, Massimiliano, Jakob Neumann, and Rudy Rossetto. "Open source GIS platform for water resource modelling: FREEWAT approach in the Lugano Lake." Spatial Information Research 26, no. 3 (October 16, 2017): 241–51. http://dx.doi.org/10.1007/s41324-017-0140-4.

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Geistefeldt, Justin, and Siavash Shojaat. "Comparison of Stochastic Estimates of Capacity and Critical Density for U.S. and German Freeways." Transportation Research Record: Journal of the Transportation Research Board 2673, no. 8 (April 25, 2019): 388–96. http://dx.doi.org/10.1177/0361198119843471.

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The randomness of freeway capacity has been analyzed in a large number of studies. In contrast, relatively little attention has been paid to the critical density at capacity and its relationship to breakdown occurrence, although density is used as a quality of service criterion for freeways. In the paper, distributions of freeway capacity and critical density are estimated and compared based on traffic data samples from 38 freeway bottleneck sections in the U.S. and Germany. It is shown that the well-established methods for stochastic capacity analysis can be applied to estimate critical density distributions by replacing volume with density in the corresponding mathematical models. Comparison of the estimated capacity and critical density distribution functions reveals that the relative variability of the capacity is lower than the variability of the critical density. This suggests that traffic volume is the more appropriate parameter to represent the trigger of traffic breakdowns than traffic density. The empirical results also show that the rather smooth traffic flow on U.S. freeways leads to a smaller variance of both the capacity and the critical density distribution compared with German freeways, whereas the average capacity per lane is roughly the same.
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Yan, Yadan, Tianzhao Guo, and Dongwei Wang. "Dynamic Accessibility Analysis of Urban Road-to-Freeway Interchanges Based on Navigation Map Paths." Sustainability 13, no. 1 (January 3, 2021): 372. http://dx.doi.org/10.3390/su13010372.

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Accessibility is important for road network planning and design, especially the accessibility of freeway entrances and exits, which reflects the convenience of travelers using freeways and the rationality of the connection between urban roads and freeways. Based on the path information of navigation map software, a new comprehensive travel impedance model to dynamically analyze the accessibility of freeway entrances and exits was proposed. The dynamic accessibility of freeway entrances and exits in Zhengzhou was studied using the proposed comprehensive impedance model, and the calculation results were analyzed. The accessibility of freeway entrances and exits is characterized by dynamic changes; the accessibility during the off-peak evening period is the highest, while that during the morning peak period and evening peak period is lower. The results of the comprehensive impedance model are roughly consistent with reality. From a location perspective, regardless of the period of time, the accessibility of freeway entrances and exits in the central and surrounding areas of Zhengzhou is always at a lower level, and during the off-peak afternoon period, the accessibility of the eastern part of the city is notably higher than that of the western part. Additionally, the accessibility of freeway entrances and exits is closely related to the traffic status of the road network and the characteristics of regional land use. The information can provide feedback for planning road networks and provide a reference for road network planning and traffic facility design.
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Dissertations / Theses on the topic "FREEWAT"

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Safre, Anderson Luiz dos Santos. "Simulação numérica do fluxo das águas subterrâneas na estação ecológica de Santa Barbára/SP." Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/154443.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Os usos de técnicas de modelagem em águas subterrâneas vêm sendo amplamente utilizado para entender a variabilidade e as incertezas associadas às condições hidrodinâmicas dos aquíferos. Os modelos numéricos de fluxo das águas subterrâneas são utilizados para representar a distribuição da carga hidráulica, bem como a velocidade e volume de escoamento da água no aquífero. O Estado de São Paulo possui algumas unidades de conservação de proteção integral, chamadas de Estações Ecológicas. Na região hidrográfica do Médio Paranapanema (UGRHI-17), destaca-se a Estação Ecológica de Santa Barbara (EEcSB), localizada sob uma transição do Sistema Aquífero Bauru (SAB) e o Sistema Aquífero Serra Geral (SASG). A principal atividade econômica na região é a agricultura, onde as águas subterrâneas e superficial são captadas para a irrigação. A demanda excessiva pode ameaçar os recursos hídricos e os ecossistemas da região. Desse modo, foi analisado nesse estudo qual o papel da EEcSB como área de garantia de recarga, utilizando a modelagem do fluxo das águas subterrâneas a partir da plataforma FREEWAT, que utiliza o código MODFLOW de diferenças finitas para simulação numérica. Gerou-se uma camada de espessura variada, representado o SAB. A discretização horizontal foi de 7.789 células ativas, com extensões de 100 m x 100 m. Foram utilizados 23 poços de observação, distribuídos por entre as microbacias da EEcSB, para calibração do modelo. A recarga foi dívida em duas zonas para representar a EEcSB ou outros usos da terra no entorno. Os valores variaram entre 15% de recarga da precipitação média. As duas formações do SAB contidas na EEcSB (Adamantina e Marilia) foram representadas por zonas com diferentes condutividades hidráulicas, a primeira com 1,75 m/d e a segunda com 0,9 m/d. A análise de sensibilidade foi realizada automaticamente pelo módulo UCODE_2014 e demonstrou que os parâmetros com maior sensibilidade foram a condutividade hidráulica na zona 1 e a recarga. A calibração teve um erro médio quadrático residual de 0,52 m. O valor total de afluxo simulado pelo modelo em regime permanente é de 66.893,882 m³/d, onde 59.079 m³/d correspondem ao volume escoado pelos drenos, e 7.813 m³/d ao valor de saída pela evapotranspiração. Foram observados três padrões principais de fluxo, com um divisor de águas subterrâneas no centro do domínio simulado. Um padrão de fluxo possui sentido Oeste em direção ao Rio Capivari, apresentando segmentações nas direções de fluxo próximas aos córregos afluentes (Divisa, Santana, Guarantã e Boi). Foram simulados dois cenários, o primeiro com a remoção de 50% da área e o segundo com remoção total da EEcSB. O primeiro cenário apresentou redução de 53,6% no volume da recarga e 47,5% no volume das drenagens, com quedas de até 11m no nível freático. O segundo cenário apresentou uma redução de 61,68% na recarga e de 77,79% na vazão das drenagens com rebaixamentos de até 14m no nível freático.
The uses of groundwater modeling techniques have been widely applied to understand the variability and uncertainties associated with the hydrodynamic conditions of aquifers. Numerical groundwater models are used to represent the hydraulic head distribution, as well as the velocity and volumetric flow. The São Paulo State has some Conservation Units of integral protection, called Ecological Stations. In the Médio Paranapanema Hydrographic region (UGRHI-17), stands out the Santa Bárbara Ecological Station (EEcSB), located under a transition from the Bauru Aquifer System (BAS) and the Serra Geral Aquifer System (SGAS). The main economic activity in the region is agriculture, where the groundwater and surface water are extracted for irrigation. The excessive demand of water threatens the region’s water resources and ecosystems. Thus, in this study, the role of EEcSB as a recharge guarantee area, was analyzed through groundwater flow modeling through the FREEWAT platform, that uses the MODFLOW finite difference code for numerical approximation. One layer of varied thickness, representing the BAS was generated. The horizontal discretization was made of 7,789 active cells, with 100 m x 100 m extension. Twenty three observation wells were used, distributed among EEcSB micro-basins for calibration. The recharge was divided in two zones, to represent the EEcSB and the other land uses in the environment. Recharge values varied around 15% of average rainfall. The two BAS formations (Adamantina and Marillia) at EEcSB were represented by two zones with different hydraulic conductivity, the first with 1.75 m.d-1, and the second with 0.9 m.d-1. The sensitivity analysis was performed automatically by UCODE_2014 module and showed that the parameters with the highest sensitivity were the hydraulic conductivity at zone 1 and the recharge. The calibration had a mean square residual error of 0.52 m. The total value of simulated inflow by the steady state model is 66,893,882 m³.d-1 where outflow was 59,079 m³.d-1 by the leakage into the drains, and 7,813 m³.d-1 by evapotranspiration. Three main flow patterns were observed, with a groundwater divide at the center of the simulated domain. A flow pattern runs westward toward the Capivari Rver, showing segmentations in the flow directions near the tributaries (Divisa, Santana, Guarantã and Boi). Two scenarios were simulated, the first with the removal of 50% of the area and the second one with total removal of the EEcSB. The first scenario presented a reduction of 53.6% in the recharge volume and 47.5% in the drainage volume, with decreases up to 11 m in the water table. The second scenario presented a reduction of 61.685 in recharge and 77.79% n drainage flow with decreases up to 14 m in the water table.
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Angheben, Anna. "Mapping and modeling of the groundwater at the dam site in Bremen. A preliminary flow model." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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Groundwater is of fundamental importance in water resources planning as it serves as storage/release entity. The hydrological characterization of the groundwater in Bremen area in the present work has been considered using two approaches. i) analysis of parameters collected during field campaign, i.e. piezometric head and electrical conductivity; ii) model elaboration and simulation with the forthcoming FREEWAT plugin for QGIS. After straightened activities in Weser up to the North Sea, the Hemelingen barrier, the peculiarity of the study area, was built to maintain a constant flow in the upstream part. It strongly affects the groundwater movement: water flows from upstream towards downstream with semicircular movements around the dam. Tidal phenomena in Weser downstream cause tidal fluctuation in groundwater level up to 300 m from the river. As concern electrical conductivity, data provided from datalogger measurements and laboratory analyses connect salt concentration to natural sources, due to the geology of the area, and mainly to residual discharge into the river of compounds from mining activities from upstream. Model processing and set up required some input data, recovered from database, literature or previous studies and model calibration considered two aspects: the comparison modeled/measured values and the analysis of hydrological reasonableness. Several simulations were carried out to evaluate how the model responds to input variations. Changes both in input values (i.e. the thickness of the aquifer, the specific storage, the hydraulic conductivity) and in boundary conditions (performed through river, recharge and well packages) resulted in rather different model output. Uncertainty in some parameters created problems in the calibration, especially in the area affected by tidal fluctuations, demonstrating that, working with parameters totally or partly unknown, may make difficult the proper transposition of the natural system in a model scheme.
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Chew, Megan Lenore. "Shaker Heights’ Revolt Against Highways." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1252436871.

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Chin, Nora. "Investigating the Correlation between Freeway Service Levels and Freeway Service Patrol Assists." DigitalCommons@CalPoly, 2015. https://digitalcommons.calpoly.edu/theses/1453.

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The Bay Area Metropolitan Transportation Commission’s (MTC) Freeway Service Patrol’s highway motorist response service is reporting a reduction in their service levels. We analyze the relationship between the reduction in the Bay Area Freeway Service Patrol’s (FSP) motorist assists and changes in vehicle miles traveled (VMT), California Highway Patrol (CHP) reported incidents, and cover research on the impact of new and old vehicle fleet turnover. VMT and CHP incidents have differential effects on FSP assists. Although incidents occurring on freeways with high traffic flows tend to cause more congestion, the trend in local VMT along Bay Area freeway corridors does not share a strong correlation with FSP assists. Through a chi-square test, bivariate correlation and cross tabulation, we can see a relationship and pattern between FSP assists, incidents and VMT. Further analysis into the dispersion of assists, incidents and VMT show that the distribution of the FSP assists over CHP reported incidents is not perfectly equal. By analyzing VMT, CHP reported incidents and research around new vehicle fleet turnover affecting FSP assisted-incidents, Metropolitan Transportation Commission staff can systematically improve the FSP operational model; strategize ways to improve service on needier freeway corridors, while reducing unnecessary service in other regions.
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Jagtap, Seema. "IMPACT OF CONSTRUCTION ON FREEWAY TRAFFIC OPERATIONS." Master's thesis, University of Central Florida, 2008. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2177.

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This study provides an insight into the impact of construction activities on traffic operations. Specifically, the topic of interest for this thesis is to study the impact of construction on traffic operations for construction projects on Interstate 4 from SR 434 to John Young Parkway, from SR 528 to SR 535, and from SR 482 to SR 528. These three projects were chosen because they were the only projects on Interstate 4 where both construction data and loop detector data were available for analysis. The data was collected by examining the Florida Department of Transportation daily inspection reports which had detailed documentation of construction operations that took place. The following information was collected: date, type of construction work being performed, time, location, and direction of impact to the traveling public. These data points were cross-referenced to the loop detector stations and mile posts to collect the loop detector data and roadway geometric characteristics such as location of ramps, type of median, etc. The loop detector data (speed, volume, and occupancy) were collected and aggregated for the data analysis. The loop detector data were collected during construction, one year prior to construction, and one year after construction for comparison purposes. Logistic regression analysis under the within-stratum matched sampling framework was conducted as an exploratory analysis to see if there was a difference on the traffic impacts with and without construction. This was done by matching the variables to ensure that there were no other differences impacting the traffic operations. Logistic regression proved there was a difference in the traffic operations with and without the presence of construction. The simple model results demonstrated that speed was reduced, occupancy was increased, and volume decreased during construction. After construction, the speed and volume increased and the occupancy decreased. Linear regression and analysis of covariance were used to quantify the impact of the various construction activities on the speed, occupancy and volume. Linear regression and analysis of covariance were used to understand the impacts from the presence of roadway geometrics on freeway traffic operations during construction. Logistic regression controls the geometrics, linear regression and analysis of covariance demonstrated how the geometrics impacted the construction effects. The geometric characteristics of each area were included in this analysis. This thesis investigates construction activities and roadway geometric parameters that impact traffic freeway operations (speed, volume, and occupancy) before, during, and after construction. This research showed the impact of different types of construction operations in a highway construction widening project. This research demonstrated that construction activities have a significant impact on speed, volume, and occupancy. Different types of construction activities have more of an impact than other activities. Paving had the highest adverse impact. Agencies writing construction contracts should prohibit paving during the most highly congested times. For example, in Orlando, Florida on Interstate 4, agencies should prohibit night paving during the peak holiday seasons (such as Thanksgiving, spring breaks, Christmas, etc.) around the tourist attractions during closing times, during the peak morning hours, and during the closing times of high attendance activities, such as Halloween Horror Nights at Universal Studios when high attendance is anticipated at the theme parks. Roadway geometrics also impact the traffic operations differently, before, during, and after construction and differently during various times of the day. The information of improved roadway geometrics and faster traffic flow can be used at open houses for upcoming projects where there are many people opposed to construction projects to show how the roadway construction projects actually increase traffic flow, helping everyone to get to their destinations much faster. The impact of the traffic delays in the congested areas, such as the tourist areas on Interstate 4 during the peak traffic times could be quantified to calculate delay costs to the roadway users.
M.S.C.E.
Department of Civil and Environmental Engineering
Engineering and Computer Science
Civil Engineering MSCE
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Ahmed, Kazi Iftekhar. "Modeling freeway land changing behavior." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/38773.

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Xu, Lei. "Potential single-occupancy vehicle demand for the Katy Freeway and Northwest Freeway high-occupancy vehicle lanes." Texas A&M University, 2005. http://hdl.handle.net/1969.1/4358.

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Since the 1960’s, high-occupancy vehicle (HOV) lanes have been successfully used as a travel demand management technique. In recent years, there has been a growing interest in the use of high-occupancy toll (HOT) lanes as an alternative to HOV lanes to help manage the increasing demand for travel. HOT lanes combine pricing and vehicle occupancy restrictions to optimize the demand for HOV lanes. As two of the four HOT lanes in the world, the HOT lane facilities in Houston, Texas received relatively low patronage after operating for over 6 years on the Katy Freeway and over 4 years on the Northwest Freeway. There existed an opportunity to increase the usage of these HOT lanes by allowing single-occupancy vehicle (SOV) travelers to use the lanes, for an appropriate toll. The potential SOV demand for HOV lane use during the off-peak periods from the Katy Freeway and Northwest Freeway general-purpose lane (GPL) travelers was estimated in this study by using the data collected from a 2003 survey of travelers on the Katy and Northwest Freeway GPLs who were not enrolled in QuickRide. Based on survey results, more travelers would choose to drive on the HOT lanes as SOV travelers during the off-peak periods when the facilities provided higher travel time savings and charged lower tolls. Two important factors influencing travelers’ use of the HOV lanes were their value of travel time savings (VTTS) and penalty for changing travel schedule (VPCS). It was found that respondents had VTTS approximately 43 percent of their hourly wage rate and VPCS approximately 3 percent of their hourly wage rate. Combining this information with current travel time savings and available capacity on the HOV lanes, it was found that approximately 2000 SOV travelers per day would pay an average toll of $2.25 to use the HOV lanes during the off-peak periods.
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Finke, Joyce Ellen. "The freeway process : an examination of local power, goals and means of adaptation to freeway development /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487259125220598.

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Modi, Vipul. "Comparison of freeway capacity estimation methods." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0025105.

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Chen, Hongyun. "Safety evaluation of freeway exit ramps." [Tampa, Fla.] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002338.

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Books on the topic "FREEWAT"

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Freeway. Seattle, WA: Fantagraphics Books, 2011.

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Livingstone, Ian. Freeway fighter. New York: Laurel Leaf Books, 1985.

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Berlin, Deutsche Guggenheim, and Solomon R. Guggenheim Museum, eds. Freeway balconies. New York, N.Y: Guggenheim Museum Publications, 2008.

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Livingstone, Ian. Freeway fighter. London: Puffin, 1985.

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Roper, David H. Freeway incident management. Washington, D.C: Transportation Research Board, National Research Council, 1990.

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Haboian, Kevin A. Freeway management strategies. New York (1 Penn Plaza, New York 10119): Parsons Brinckerhoff, 1993.

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Dudek, Conrad L. Freeway corridor management. Washington, D.C: Transportation Research Board, National Research Council, 1992.

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Nihan, N. L. Freeway congestion prediction. [Olympia, Wash.]: Washington State Dept. of Transportation, 1995.

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Cox, D. G. On the freeway. Baltimore, Md: American Literary Press, 1996.

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Freeman. Chicago: Agate, 2012.

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Book chapters on the topic "FREEWAT"

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Armstrong, Margaret, Alain G. Galli, Gaëlle Le Loc’h, François Geffroy, and Rémi Eschard. "Freeware." In Plurigaussian Simulations in Geosciences, 121–38. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-12718-6_8.

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Taylor, Ian J., and Andrew B. Harrison. "Freenet." In From P2P and Grids to Services on the Web, 213–25. London: Springer London, 2009. http://dx.doi.org/10.1007/978-1-84800-123-7_12.

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Armstrong, Margaret, Alain Galli, Hélène Beucher, Gaëlle Le Loc’h, Didier Renard, Brigitte Doligez, Rémi Eschard, and François Geffroy. "Freeware." In Plurigaussian Simulations in Geosciences, 149–61. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-19607-2_9.

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Weik, Martin H. "freeware." In Computer Science and Communications Dictionary, 642. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_7590.

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Elefteriadou, Lily. "Freeways." In An Introduction to Traffic Flow Theory, 165–87. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-8435-6_8.

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Gardiner, James B., and Steven R. Janssen. "FreeFab." In Robotic Fabrication in Architecture, Art and Design 2014, 131–46. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04663-1_9.

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Levinson, David, David Gillen, and Pavithra Parthasarathi. "Freeway Service Patrols." In Assessing the Benefits and Costs of ITS, 199–215. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/1-4020-7874-9_11.

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Ferrara, Antonella, Simona Sacone, and Silvia Siri. "Freeway Traffic Systems." In Freeway Traffic Modelling and Control, 3–23. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-75961-6_1.

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Gordon, Robert L. "Evaluation of System Design and Operation." In Intelligent Freeway Transportation Systems, 175–81. Boston, MA: Springer US, 2010. http://dx.doi.org/10.1007/978-1-4419-0733-2_10.

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Gordon, Robert L. "Compact Disk." In Intelligent Freeway Transportation Systems, 183–85. Boston, MA: Springer US, 2010. http://dx.doi.org/10.1007/978-1-4419-0733-2_11.

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Conference papers on the topic "FREEWAT"

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SAPIANO, MANUEL, MICHAEL SCHEMBRI, HENRY DEBATTISTA, and NADIA THEUMA. "INTEGRATING NUMERICAL MODELS IN RIVER BASIN MANAGEMENT PLANS: THE FREEWAT PROJECT." In WATER RESOURCES MANAGEMENT 2017. Southampton UK: WIT Press, 2017. http://dx.doi.org/10.2495/wrm170221.

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Pandele, Ada. "UTILIZATION OF THE FREEWAT PLATFORM - FREE OPEN-SOURCE TOOL FOR GROUNDWATER RESOURCE MANAGEMENT, WITHIN PILOT AREA BANAT PLAIN." In 17th International Multidisciplinary Scientific GeoConference SGEM2017. Stef92 Technology, 2017. http://dx.doi.org/10.5593/sgem2017/12/s02.124.

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Phegley, Brian, Roberto Horowitz, and Gabriel Gomes. "Model-Based Fault Detection Among Freeway Loop Sensors." In ASME 2016 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/dscc2016-9722.

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Loop detectors are installed along many of the freeways across the state of California to provide real-time and historical traffic data. These data are used by Caltrans for traffic management operations, such as freeway ramp metering, and to evaluate the performance of freeway corridor traffic management systems. These data are also being used to calibrate traffic flow models and to perform model-based predictions of freeway corridor congestion and traffic throughput performance. However, such detection is prone to contain errors and inconsistencies, which can pose problems in further use of the data, and is also of such large quantities that identification of errors can be tedious. This paper proposes a fault detection algorithm associating loop detector data to the cell transmission model to identify significant errors among such detectors. It discusses how such an algorithm would apply to loop detection along the mainline freeway, as well as extends the algorithm to determine errors along on and off ramp detectors. It also gives a real-life example with appropriate identification of detectors in error.
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Mehr, Negar, and Roberto Horowitz. "Probabilistic Freeway Ramp Metering." In ASME 2016 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/dscc2016-9827.

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Ramp metering is proved to be an effective strategy for reducing or avoiding freeway traffic congestion. As a result, huge amount of research has been conducted on synthesizing effective ramp metering controls. In the previous works, freeway is assumed to be a deterministic system which is in contrast with the intrinsic stochastic nature and behavior of freeways. Our work focuses on bridging this gap, and we propose a framework for freeway ramp metering in a probabilistic setting. Our algorithm finds onramp flows in a freeway network while treating exogenous vehicular arrivals as random variables with known distributions, allowing for the network arrivals to conform with their stochastic nature. We use sampling techniques in a model predictive control setup to formulate a tractable approximation of our stochastic optimization. Furthermore, we demonstrate how to relax the non-linear constraints of our optimization to create a linear program with an augmented set of constraints. We prove that the solution of our linear program formulation is the same as the solution of the original mixed-integer formulation. We showcase the results of our algorithm on an exemplar freeway network and introduce multiple interesting future research directions that are important and can be pursued solely in a stochastic framework.
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Svidzinska, D., and M. Grodzynskyi. "Open source GIS platform for water resource modelling: FREEWAT approach in the Bakumivka river irrigation-drainage network catchment, Ukraine." In 18th International Conference on Geoinformatics - Theoretical and Applied Aspects. European Association of Geoscientists & Engineers, 2019. http://dx.doi.org/10.3997/2214-4609.201902077.

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Dervisoglu, Gunes, and Roberto Horowitz. "Model Based Fault Detection of Freeway Traffic Sensors." In ASME 2011 Dynamic Systems and Control Conference and Bath/ASME Symposium on Fluid Power and Motion Control. ASMEDC, 2011. http://dx.doi.org/10.1115/dscc2011-6177.

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This paper presents a model based fault detection and exclusion scheme that implements a decision logic to automatically identify faulty or mislocated freeway traffic sensors in the presence of unknown on-ramp and off-ramp flows. The algorithm is deployed within the framework of a suite of software tools, named TOPl, which models traffic flow via a macroscopic model, calibrates the model based on available data and runs simulations to evaluate various operational strategies such as ramp metering, demand management, incident management, etc. TOPl has been used to model various freeways in California, such as Interstate 80, Interstate 210, Interstate 880 and Interstate 680. Two main difficulties with data collection on California freeways were found to be missing ramp flow and faulty mainline data, which decrease the accuracy of the model and increase the time and effort invested in model calibration. The former of these difficulties has been previously addressed by an iterative learning algorithm that estimates the missing ramp flows and the latter is tackled by the method presented in this work.
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Muralidharan, Ajith, and Roberto Horowitz. "Analysis of an Adaptive Iterative Learning Algorithm for Freeway Ramp Flow Imputation." In ASME 2011 Dynamic Systems and Control Conference and Bath/ASME Symposium on Fluid Power and Motion Control. ASMEDC, 2011. http://dx.doi.org/10.1115/dscc2011-6178.

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We present an adaptive iterative learning based flow imputation algorithm, to estimate missing flow profiles in on ramps and off ramps using a freeway traffic flow model. We use the Link-Node Cell transmission model to describe the traffic state evolution in freeways, with on ramp demand profiles and off ramp split ratios (which are derived from flows) as inputs. The model based imputation algorithm estimates the missing flow profiles that match observed freeway mainline detector data. It is carried out in two steps: (1) adaptive iterative learning of an “effective demand” parameter, which is a function of ramp demands and off ramp flows/ split ratios; (2) estimation of on ramp demands/ off ramp split ratios from the effective demand profile using a linear program. This paper concentrates on the design and analysis of the adaptive iterative learning algorithm. The adaptive iterative learning algorithm is based on a multi-mode (piecewise non-linear) equivalent model of the Link-Node Cell transmission model. The parameter learning update procedure is decentralized, with different update equations depending on the local a-priori state estimate and demand estimate. We present a detailed convergence analysis of our approach and finally demonstrate some examples of its application.
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Shen, Yifan, Ke Liu, Ziting Guo, Wenli Zhang, Guanghui Zhang, Vaneet Aggarwal, and Mingyu Chen. "Freeway." In CF '20: Computing Frontiers Conference. New York, NY, USA: ACM, 2020. http://dx.doi.org/10.1145/3387902.3394028.

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Liao, W. I., and C. H. Loh. "Fragility Analysis for Highway Bridges in Taiwan." In ASME 2003 Pressure Vessels and Piping Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/pvp2003-2130.

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This paper presents the methods developed to enhance the transportation lifelines module in HAZ-Taiwan for highway bridges. The objective of this paper is to define the bridge classification and provide the fragility functions of the North-South Freeway in Taiwan that by utilize the available investigation data. The organization of this paper is as follows. First, the available bridge classes of the North-South freeway in Taiwan are reviewed and a new classification based on the available data to be implemented in Haz-Taiwan is proposed. Second, the description of failure mechanisms and criteria in different damage states adopted in this research are summarized. Third, the theoretical methodology of the fragility analysis for the new bridge classes and examples for freeway bridges are presented. Parameters for describing the fragility functions for each class are also generated and shown in the paper.
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Maywald, P. V., and D. K. Beale. "Development of a Freejet Capability for Evaluating Inlet-Engine Compatibility." In ASME 1991 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/91-gt-401.

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The Arnold Engineering Development Center (AEDC) is installing a freejet test capability into the Aero-propulsion Systems Test Facility (ASTF). The freejet will provide the capability for ground determination of turbine engine and aircraft inlet compatibility by utilizing full-scale inlets and engines as test articles in a simulated flight environment. The details of the design, installation, and projected testing capability are described for a 57 ft2 supersonic nozzle and a 77 ft2 subsonic nozzle. Support systems for mechanically pitching and yawing the freejet nozzles are also reported as well as the test cell hardware for capturing the freejet nozzle flow. The plans for demonstrating the freejet capability prior to its initial operational date are explained. The technology development efforts to validate and utilize the freejet test capabilities are also described.
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Reports on the topic "FREEWAT"

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Zhang, Lei. No More Freeways: Urban Land Use-Transportation Dynamics without Freeway Capacity Expansion. Portland State University Library, January 2011. http://dx.doi.org/10.15760/trec.100.

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Achillides, Christos, and Darcy Bullock. Performance Metrics for Freeway Sensor. West Lafayette, IN: Purdue University, 2004. http://dx.doi.org/10.5703/1288284313287.

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Bertini, Robert, and Soyoung Ahn. Characteristics of Transitions in Freeway Traffic. Portland State University Library, September 2010. http://dx.doi.org/10.15760/trec.150.

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Pal, Raktim, and Kumares Sinha. Optimal Design of Freeway Incident Response Systems. West Lafayette, IN: Purdue University, 2000. http://dx.doi.org/10.5703/1288284313283.

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Madanat, Samer, Hongyu Pan, and Pen-Chi Liu. Freeway Incident Likelihood Prediction and Response Decision-Making. West Lafayette, IN: Purdue University, 1997. http://dx.doi.org/10.5703/1288284313230.

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Saberi Kalaee, Meead. Investigating Freeway Speed-Flow Relationships for Traffic Assignment Applications. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.33.

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Wheeler, Nicole. Multi-Criteria Trucking Freeway Performance Measures for Congested Corridors. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.177.

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Monsere, Christopher. Empirical Observation of the Impact of Traffic Oscillations on Freeway Safety. Portland State University Library, September 2010. http://dx.doi.org/10.15760/trec.16.

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Wells, Timothy, Edward Smaglik, and Darcy Bullock. Health Monitoring Procedures for Freeway Traffic Sensors, Volume 1: Research Report. Purdue University Press, 2008. http://dx.doi.org/10.5703/1288284313442.

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Downing, W. Logan, Howell Li, William T. Morgan, Cassandra McKee, and Darcy M. Bullock. Using Probe Data Analytics for Assessing Freeway Speed Reductions during Rain Events. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317350.

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Rain impacts roadways such as wet pavement, standing water, decreased visibility, and wind gusts and can lead to hazardous driving conditions. This study investigates the use of high fidelity Doppler data at 1 km spatial and 2-minute temporal resolution in combination with commercial probe speed data on freeways. Segment-based space-mean speeds were used and drops in speeds during rainfall events of 5.5 mm/hour or greater over a one-month period on a section of four to six-lane interstate were assessed. Speed reductions were evaluated as a time series over a 1-hour window with the rain data. Three interpolation methods for estimating rainfall rates were tested and seven metrics were developed for the analysis. The study found sharp drops in speed of more than 40 mph occurred at estimated rainfall rates of 30 mm/hour or greater, but the drops did not become more severe beyond this threshold. The average time of first detected rainfall to impacting speeds was 17 minutes. The bilinear method detected the greatest number of events during the 1-month period, with the most conservative rate of predicted rainfall. The range of rainfall intensities were estimated between 7.5 to 106 mm/hour for the 39 events. This range was much greater than the heavy rainfall categorization at 16 mm/hour in previous studies reported in the literature. The bilinear interpolation method for Doppler data is recommended because it detected the greatest number of events and had the longest rain duration and lowest estimated maximum rainfall out of three methods tested, suggesting the method balanced awareness of the weather conditions around the roadway with isolated, localized rain intensities.
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