Antea Group

Barenton Bugny, France

Antea Group

Barenton Bugny, France
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Antoinet E.,Antea Group | Buffiere H.,Antea Group | Kovalcikova K.,Antea Group
Procedia Engineering | Year: 2017

In accordance with new French regulations, new dams in seismic areas have to be justified for earthquake solicitation by coupled poro-mechanical modeling. Allowable displacement thresholds are thus given by these regulations. This paper presents the first phase of a real time dependent modeling using a finite difference software for an earth dam in Guadeloupe (French West Indies) for a 7.5 magnitude earthquake. © 2017 The Authors. Published by Elsevier Ltd.

Lehmann A.,University of Geneva | Giuliani G.,University of Geneva | Mancosu E.,University of Malaga | Abbaspour K.C.,Eawag - Swiss Federal Institute of Aquatic Science and Technology | And 4 more authors.
Environmental Science and Policy | Year: 2015

The environmental status of the Black Sea is obviously closely related to its catchment. Being a closed sea, this large water body drains an area of more than 2 millionkm2, encompassing 23 countries inhabited by more than 180 million people. The main environmental issues faced by the Black Sea catchment are the same as elsewhere in Europe. These problems are exacerbated by global changes with drastic changes predicted in temperature and precipitation by the end of the century, as well as land use and demographic changes. These environmental problems are taking place in a complex geopolitical situation. In this particular context, data sharing is essential to inform managers and policy-makers about the state of the environment, which will ultimately influence the state of the Black Sea itself. The enviroGRIDS project was set up in order to promote international data sharing initiatives such as the Global Earth Observation System of Systems and the European INSPIRE directive. The enviroGRIDS project was successful in reaching the following objectives: (a) performing a gap analysis on existing Earth observations systems in the region; (b) developing regional capacities at institutional, infrastructure and human resource levels; (c) creating regional scenarios to set the scene for plausible climatic, demographic and land use futures; (d) building the first hydrological model for the entire Black Sea catchment; (e) developing the Black Sea Catchment Observation System based on interoperability standards and Grid computing technologies; (f) showcasing data sharing in several case studies, addressing important environmental issues while building a network of people with improved capacity on data sharing principles. These relative successes should not, however, hide the difficulties in making the necessary Earth observation data available to scientists, decision makers and the public, as the mind-sets at all levels are changing slowly. Controlling the access to data is still perceived by many as a necessity to guarantee the power of the state on society and as a way to preserve its security. The need to develop national spatial data infrastructures (SDI) is very important to convince all ministries and data owner that publically funded data should be made publically available. The progress in the implementation of SDI seems more limited by political agendas than by technology. It is clear, however, that implementation of the INSPIRE directive in Europe is a prerequisite for the success of many other environmental policies (e.g. Water Framework Directive; Marine Strategy Framework Directive; Biodiversity strategy 2020). © 2014 Elsevier Ltd.

Cools J.,University of Geneva | Cools J.,ANTEA Group | Johnston R.,SRI International | Hattermann F.F.,Potsdam Institute for Climate Impact Research | And 2 more authors.
Environmental Science and Policy | Year: 2013

This paper provides the synthesis of the special issue on the "role of wetlands in river basin management" and reviews lessons learnt from a comparative assessment of the presented case studies in Europe, Africa and Latin-America. Although wetlands are important for local communities and biodiversity, the services and products they deliver for local livelihoods and river basins are insufficiently known, and inadequately valued and understood by authorities. Wetlands are too often perceived as standalone elements and poorly integrated into river basin management plans.In this volume, an analytical framework is developed to formulate and compare wetland management options, also in data-poor contexts and to bridge the gap between science and policy. The framework is a set of tools and processes to structure the information flows needed to identify and score management options in terms of their impact, feasibility, vulnerability to future changes and trade-offs. In practice, it was found that the framework provided a useful set of tools to promote understanding and underpin negotiations. The major barrier for a better integration of wetlands in river basin management was found to be the lack of understanding of what the important issues were and the institutional capacity to organise cooperation and consequent implementation of the agreed plans.This paper presents the following conclusions. Firstly, rapid assessment tools and simplified scoring methods were used and proved useful in explaining issues across sectors and scales, and were important in creating mutual understanding, even though they did not necessarily present new insights for local or disciplinary experts. Secondly, in order to improve the knowledge base, an integrated database is developed, especially with regard to water quantity simulation at the river basin scale and wetland scale, potential habitat availability and the quantification of adaptive and institutional capacity, including the impact of future changes. Data has been compiled from various, scattered sources, including global data sets, sectoral wetland and/or river basin-specific quantitative and qualitative data sets. Thirdly, in case of limited data availability, rather than improving the accuracy of available quantitative data, it is proposed to better use alternative qualitative sources of data, from local experts, authority representatives and wetland users. © 2013 Elsevier Ltd.

Liersch S.,Potsdam Institute for Climate Impact Research | Cools J.,University of Geneva | Cools J.,Antea Group | Kone B.,Wetlands International | And 6 more authors.
Environmental Science and Policy | Year: 2013

This manuscript investigates the vulnerability of food security in terms of floating rice production in the Inner Niger Delta to upstream water resources management (reservoir management) and population growth under climate change and variability in the time period 2011-2050. Reservoir management and climate change have large impacts on the inflow patterns into the Inner Niger Delta and thus on the extent and duration of the flooded surface area, which in turn is closely linked to ecological integrity, livelihoods, and food production within the delta region. A vulnerability assessment concept, developed in the framework of the WETwin project, is used to investigate the impacts of existing and planned upstream dams on food demands and supply in the Inner Niger Delta under different climate and population growth scenarios. The impacts on the water balance and inundation patterns were simulated using a process-based eco-hydrological modelling system equipped with an inundation module and a reservoir module. Both projected climate change and upstream reservoir management lead to a significant reduction of peak discharges during the rainy season and hence to serious losses of potential agricultural areas within the Inner Niger Delta. The effectiveness of the planned extension of irrigated rice areas within the Inner Niger Delta, in order to mitigate the losses of areas suitable for floating rice, was investigated as adaptive measure. This land use change fulfils increasing food demands under some scenarios, but at the expense of other ecosystem services and has thus to be critically questioned. © 2012 Elsevier Ltd.

Rebelo L.-M.,International Water Management Institute | Johnston R.,SRI International | Hein T.,WasserCluster Lunz | Weigelhofer G.,WasserCluster Lunz | And 3 more authors.
Environmental Science and Policy | Year: 2013

Wetlands are too often perceived as standalone elements and are poorly integrated into river basin management. The Ramsar Convention recognizes the critical linkage between wetlands, water and river basin management; the governments that are party to the Convention have committed to conserving their wetlands within a framework of Integrated Water Resources Management (IWRM). The "Critical Path" approach and related guidance have been adopted by Contracting Parties of the Ramsar Convention in order to effectively integrate wetland conservation and management into river basin management planning and decision-making. However, despite international acceptance of the approach, it is not widely implemented. This paper provides one of the first case study based assessments of the Critical Path approach. The analysis of two contrasting Ramsar sites is presented in order to better understand the barriers to implementation in different development contexts. These are the Lobau wetland in Austria, where management institutions and regulatory frameworks are highly developed; and the Inner Niger Delta in Mali, where the capacity to implement IWRM is less evolved. A planning approach is proposed which involves structured and transparent methods for assessing ecosystem services and institutional capacity, and is suitable as a tool for identifying, prioritizing and negotiating trade-offs in ecosystem services and improving livelihoods. Based on the analysis, two main barriers to implementation are identified; mismatch between local and national or basin level priorities, and a lack of recognition of the ecosystem services provided by wetlands. © 2012 Elsevier Ltd.

Bradford R.A.,University College Dublin | O'Sullivan J.J.,University College Dublin | Van Der Craats I.M.,Antea Group | Krywkow J.,Seeconsult GmbH | And 7 more authors.
Natural Hazards and Earth System Science | Year: 2012

Public perception of flood risk and flood risk information is often overlooked when developing flood risk management plans. As scientists and the public at large perceive risk in very different ways, flood risk management strategies are known to have failed in the past due to this disconnect between authorities and the public. This paper uses a novel approach in exploring the role of public perception in developing flood risk communication strategies in Europe. Results are presented of extensive quantitative research of 1375 questionnaire responses from thirteen communities at risk across six European countries. The research forms part of two research projects funded under the 2nd ERA-Net CRUE Funding Initiative: URFlood and FREEMAN. Risk perception is conceptualised as a pillar of social resilience, representing an innovative approach to the issue. From this process recommendations are identified for improving flood risk management plans through public participation. © 2012 Author(s). CC Attribution 3.0 License.

Gevaert V.,Ghent University | Gevaert V.,Antea Group | Verdonck F.,Ghent University | De Baets B.,Ghent University
Science of the Total Environment | Year: 2012

The Water Framework Directive (WFD) has the objective of a catchment-oriented water quality protection for all European waters with the purpose of achieving a good ecological and chemical quality status by the year 2015. To that end, necessary measures should be identified and implemented, with the aim of progressively reducing pollution from priority substances. The objective of this paper is to demonstrate how a dynamic model of the integrated urban wastewater system (IUWS) can be used to test different emission reduction strategies for organic priority pollutants (PPs) in a semi-hypothetical case study on di(2-ethylhexyl)phthalate (DEHP). The IUWS is composed of coupled entities: sources, urban catchment surface (run-off/infiltration), sewer system, stormwater treatment unit, wastewater treatment plant (WWTP) including sludge handling, and receiving surface water (river). State-of-the-art dynamic fate models were selected from literature and extended with an organic pollutant fate sub-model. Dynamic DEHP release profiles were estimated using a dynamic model input generator and fed to the model to predict the fate and concentration of DEHP in each IUWS sub-system. The model was then used to test eight scenarios on environmental performance, namely (1) reduction of impervious urban area, (2) reduction of infiltration in the sewer system, (3) input reduction (excluding the main pollutant sources), (4) separating the combined sewer system, (5) treatment of stormwater by stormwater infiltration ponds (separate sewer systems), (6) placement of retention basins at main sewer junctions, (7) sand filtration of secondary effluent, and (8) pre-precipitation of phosphorous. The simulation results revealed that the most effective measure in terms of river water quality improvement for DEHP (annual average and spikiness reduction) and PP concentration in the disposed WWTP sludge, is reducing release of this substance into the environment, not surprisingly. In general, this will heavily depend on the parameterisation of the scenarios. © 2012 Elsevier B.V.

Schelfaut K.,Antea Group | Schelfaut K.,Ghent University | Pannemans B.,Antea Group | van der Craats I.,Antea Group | And 3 more authors.
Environmental Science and Policy | Year: 2011

The recent shift in flood risk management concedes that floods cannot be prevented but the impacts on and vulnerability of the risk prone communities can be reduced. Beyond mere structural defence, an integrated risk management approach deploys a diversified set of measures that moderate the economic and social drivers of risk and improve risk governance. In this context, the concept of resilience gains on importance despite the many challenges that obstruct its implementation in management practice. This paper contributes to tackling these challenges and elaborates on opportunities and bottlenecks to bring resilience into practice based on a review of the flood risk management in three case studies in Europe: Flanders (Belgium), Niedersachsen (Germany) and Calabria (Italy). The paper summarizes insights gained on three components of resilience being - institutional interplay, flood management tools and risk communication. The work that has lead to this paper is done under the FREEMAN project (flood resilience enhancement and management), funded under the 2nd CRUE ERA-Net Funding Initiative. © 2011 Elsevier Ltd.

Vanlede J.,Flanders Hydraulics Research | Vanlede J.,Technical University of Delft | Dujardin A.,Flanders Hydraulics Research | Dujardin A.,Antea Group
Ocean Dynamics | Year: 2014

The exchange flow of water and sediment between a harbor and the surrounding waters can be geometrically decomposed into three main components: tidal filling, horizontal, and vertical exchange flows. The method is applied to analyze available measurements at two important harbor basins in Belgium. The geometric analysis can also be applied to the results of a numerical model of hydrodynamics and sediment transport, provided it has sufficient horizontal, vertical, and temporal resolutions to capture the dynamics at the harbor mouth. As such, it can be used as a tool in model calibration. The presented method can provide some insight into the complex relationship (phasing and spatial correlations) between hydrodynamics and sediment concentration that determines harbor siltation. © 2014, The Author(s).

Faber N.,Antea group
41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012 | Year: 2012

In the Netherlands an inventory has been made of traffic noise reduction measures (good practices) within cities. This inventory is part of the Dutch program "Stiller op Weg" ("Silence on Roads") that is initiated by the Ministry of Infrastructure and Environment. The aim of the program is to quiet the Dutch cities by reducing traffic noise in urban areas with 3 dB by the year 2020. The "good practices" project will contribute to that goal by gathering examples of traffic noise reduction measures in Dutch cities and publish them for educational purposes. By doing so the use of different kind of noise reducing measures like silent pavements, silent tyres, electrical vehicles e.g. will be stimulated. Stakeholders like provinces, municipalities, producers, developers, consultancies and the general public can take notice of these examples, learn from them, apply them for their own benefit or get inspired to make further innovations. An initial inventory of these good practices has been made and a long list of 103 good practice initiatives of traffic noise reduction measures resulted. From this long list the most successful good practices were put on a short list and worked out in a factsheet. The factsheets of the top 10 good practices were published on a website that is open for all public. On the website each good practice example is described in a summary, with a photo and the location in Google maps. Background information on results, experiences, documents, reports are available as downloads. Stakeholders can also upload new good practice initiatives on the website, with the aim is to create a snowball effect by which the list of good practice projects will steadily grow. It is recommended to set up similar programs in other countries that could learn and benefit from the experiences in The Netherlands. In the end this could lead to an international database of good practices and a quieter environment in which we are living. Copyright © (2012) by the Institute of Noise Control Engineering (INCE).

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