Please wait, while we are loading the content...
Please wait, while we are loading the content...
| Content Provider | Springer Nature Link |
|---|---|
| Author | Grenier, Christophe Régnier, Damien Mouche, Emmanuel Benabderrahmane, Hakim Costard, François Davy, Philippe |
| Copyright Year | 2012 |
| Abstract | The impact of glaciation cycles on groundwater flow was studied within the framework of nuclear waste storage in underground geological formations. The eastern section of the Paris Basin (a layered aquifer with impervious/pervious alternations) in France was considered for the last 120 ka. Cold periods corresponded with arid climates. The issue of talik development below water bodies was addressed. These unfrozen zones can maintain open pathways for aquifer recharge. Transient thermal evolution was simulated on a small-scale generic unit of the landscape including a “river” and “plain”. Coupled thermo-hydraulic modeling and simplified conductive heat transfer were considered for a broad range of scenarios. The results showed that when considering the current limited river dimensions and purely conductive heat transfer, taliks are expected to close within a few centuries. However, including coupled advection for flows from the river to the plain (probably pertinent for the eastern Paris Basin aquifer recharge zones) strongly delays talik closure (millennium scale). The impact on regional underground flows is expected to vary from a complete stop of recharge to a reduced recharge, corresponding to the talik zones. Consequences for future modeling approaches of the Paris Basin are discussed.L’impact des cycles glaciaires sur l’écoulement d’eau souterraine a été étudié dans le cadre d’un stockage souterrain de déchets radioactifs dans les formations géologiques du sous-sol. On a considéré la partie Est du Bassin Parisien (un aquifère multicouches avec alternance de formations imperméables/perméables) en France, au cours des derniers 120 000 ans. Les périodes froides correspondent à des climats arides. La question du développement de taliks sous les cours d’eau a été traitée. Ces zones non gelées peuvent maintenir des passages ouverts pour la recharge des aquifères. Une évolution thermique transitoire a été simulée sur une unité typique du paysage à petite échelle comprenant une « rivière » et une « plaine ». La modélisation couplée thermo-hydrodynamique et de simples transferts de chaleur par conduction ont été considérés pour une large gamme de scénarios. Les résultats montrent que, lorsque l’on considère les dimensions actuelles limitées de la rivière et des transferts de chaleur purement conductifs, les taliks sont supposés se fermer en quelques siècles. Cependant, la prise en compte de flux advectifs couplés de la rivière vers la plaine (ce qui est probablement pertinent pour les zones de recharge des aquifères de l’Est du Bassin Parisien) retarde fortement la fermeture des taliks (échelle millénaire). L’impact sur les écoulements souterrains régionaux est supposé varier entre un arrêt complet de la recharge et une recharge réduite, correspondant aux zones de taliks. Les conséquences pour les futures approches de modélisation du Bassin Parisien sont discutées.Se estudió el impacto de los ciclos de glaciación sobre el flujo de agua subterránea dentro del marco del almacenamiento de residuos nucleares en formaciones geológicas en el subsuelo. Se consideró los últimos 120 ka para la sección oriental de la cuenca de París en Francia (un acuífero estratificado con alternancia de capas permeables e impermeables). Los períodos fríos se corresponden con climas áridos. Se trató la cuestión del desarrollo del talik debajo de los cuerpos de agua. Estas zonas no congeladas pueden mantener trayectorias abiertas para la recarga del acuífero. Se simuló la evolución termal transitoria sobre una unidad genérica de pequeña escala del paisaje incluyendo un “rio” y una “planicie”. Se consideraron modelados acoplados térmicos e hidráulicos y de transferencia conductiva de calor simplificados para un amplio rango de escenarios. Los resultados muestran que cuando se consideran los actuales ríos de dimensiones limitadas y puramente de transferencia conductiva del calor, se espera que los taliks se cierren dentro de unos pocos siglos. Sin embargo, incluyendo la advección acoplada para flujos del río a la planicie (probablemente pertinente para el este de la zona de recarga del acuífero de la cuenca de París) se retrasa fuertemente el cierre de los taliks (a escala de milenios). El impacto sobre el flujo subterráneo regional se espera que varíe desde un cese completo de la recarga a una recarga reducida, correspondiente a la zona de taliks. Se discuten las consecuencias de futuros enfoques de modelados de la cuenca de París.本文在地下的地质构造中储存核废物的框架中研究了冰期旋回对地下水流的影响。本文讨论了法国巴黎盆地的东部地区(一个具有不透水/透水交替变化的层状含水层)最近12万年的变化。冰期与干旱的气候相一致。文中提出了在水体之下不冻区的发育问题。这些不冻区可以为含水层的补给维持开放的路径。文中模拟了小尺度地形通用单元中短暂的热演化,包括“河流”和“平原”。本文讨论了可应用于更多实例的相互耦合的热工水力模型和简化的热传导。结果显示,当考虑现有的有限的河流维度和纯粹的热传导时,不冻区可能在几个世纪内闭合。然而,包括从河流到平原(可能与巴黎盆地东部的含水层补给区相关)的水流的耦合对流强烈地延迟了不冻区的闭合(千年的尺度)。这对区域地下水流很有可能造成从补给完全消失变化到补给减少等不同程度的影响,与不冻区相一致。文中最后讨论了巴黎盆地未来的模拟方法的结果。O impacte dos ciclos de glaciação no fluxo de água subterrânea foi estudado dentro de um quadro de armazenamento de resíduos nucleares enterrados em formações geológicas. A secção este da Bacia de Paris (um aquífero multicamada com alternâncias impermeável/permeável), em França, foi considerada para os últimos 120 ka de períodos frios correspondentes a climas áridos. Foi abordada a questão do desenvolvimento de taliks (volume de solo não congelado dentro do permafrost) sob camadas aquíferas. Estas zonas não congeladas podem manter canais abertos para a recarga de aquíferos. Foram simuladas evoluções termais transientes numa unidade genérica de paisagem, a pequena escala, incluindo um “rio” e uma “planície”. Foi considerado um modelo termo-hidráulico acoplado e uma transferência de calor condutivo simplificado, para uma larga variedade de cenários.Os resultados mostram que, quando considerando as dimensões correntes limitadas do rio e uma transferência de calor puramente condutiva, é expectável que os taliks fechem dentro de uns poucos de séculos. No entanto, ao incluir adveção acoplada para fluxos do rio para a planície (provavelmente pertinente para as zonas de recarga do aquífero da Bacia oriental de Paris), surge um forte atraso no fecho dos taliks (à escala de milénios). É expectável que o impacte nos fluxos de água subterrânea regional variem desde a completa paragem na recarga até uma redução na mesma, correspondente às zonas de talik. São discutidas as consequências para as futuras abordagens à modelação na Bacia de Paris.Effekterna av glaciala cykler på grundvattenflödet har studerats inom ramen för lagring av kärnavfall i underjordiska geologiska formationer. Studien avser den östra delen av Paris Bassängen i Frankrike (en lagrad akvifär med ogenomträngliga / genomsläppliga strukturer), den studerade tidsperioden representerar de senaste 120 ka. Kalla perioder motsvarar torra klimat. Frågeställningar kring utveckling av Taliker under vattendrag har inkluderats i studien. Sådana ofrysta områden kan upprätthålla öppna flödesvägar för grundvattenbildning till underliggande akvifärer. Den tidsberoende temperaturutvecklingen simulerades med hjälp av småskaliga generiska landskapsenheter av typen “flod” eller “slätt”. Studien är en kopplad termo-hydraulisk modellering med en förenklad beskrivning av konduktiv värmeöverföring. Ett brett spektrum av scenarier har inkluderats. Resultaten visar att när man simulerar de begränsade floddimensioner som förekommer för närvarande och endast inkluderar konduktiv värmetransport, kan taliker förväntas var stängda (frysta) inom några århundraden. Om också advektion inkluderas i den kopplade termo-hydrauliska beskrivningen för flöden från floder till slätt (vilket troligen är en relevant process för östra Paris Bassängens inströmningsområden) kommer stängningen av taliker att starkt fördröjas (millennium skala). Påverkan på de regionala underjordiska flödena förväntas variera från ett fullständigt förhindrande av grundvattenbildning till en förminskad grundvattenbildning som endast förekommer vid taliker. Vilka konsekvenser studiens resultat har för framtida metoder att modellera Paris Bassängen diskuteras. |
| Starting Page | 257 |
| Ending Page | 270 |
| Page Count | 14 |
| File Format | |
| ISSN | 14312174 |
| Journal | Hydrogeology Journal |
| Volume Number | 21 |
| Issue Number | 1 |
| e-ISSN | 14350157 |
| Language | Swedish |
| Publisher | Springer-Verlag |
| Publisher Date | 2012-10-25 |
| Publisher Institution | International Association of Hydrogeologists |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | France Groundwater/surface-water relations Numerical modeling Waste disposal Paleohydrogeology Hydrogeology Geology Waste Water Technology Water Pollution Control Water Management Aquatic Pollution |
| Content Type | Text |
| Resource Type | Article |
| Subject | Earth and Planetary Sciences Water Science and Technology |
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
Learn more about this project from here.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
| Sl. | Authority | Responsibilities | Communication Details |
|---|---|---|---|
| 1 | Ministry of Education (GoI), Department of Higher Education |
Sanctioning Authority | https://www.education.gov.in/ict-initiatives |
| 2 | Indian Institute of Technology Kharagpur | Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project | https://www.iitkgp.ac.in |
| 3 | National Digital Library of India Office, Indian Institute of Technology Kharagpur | The administrative and infrastructural headquarters of the project | Dr. B. Sutradhar bsutra@ndl.gov.in |
| 4 | Project PI / Joint PI | Principal Investigator and Joint Principal Investigators of the project |
Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon |
| 5 | Website/Portal (Helpdesk) | Queries regarding NDLI and its services | support@ndl.gov.in |
| 6 | Contents and Copyright Issues | Queries related to content curation and copyright issues | content@ndl.gov.in |
| 7 | National Digital Library of India Club (NDLI Club) | Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach | clubsupport@ndl.gov.in |
| 8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
| 9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |
|
Loading...
|