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La houille blanche |
Dépouillements
Ajouter le résultat dans votre panierChamp de vitesses et contraintes de cisaillement dans un collecteur d'assainissement / Hossein Bonakdari in La Houille blanche, N° 3 (Mai/Juin 2008)
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 20-25
Titre : Champ de vitesses et contraintes de cisaillement dans un collecteur d'assainissement Type de document : texte imprimé Auteurs : Hossein Bonakdari, Auteur ; Frederique Larrarte, Auteur ; Claude Joannis, Auteur Année de publication : 2010 Article en page(s) : pp. 20-25 Note générale : Hydraulique Langues : Français (fre) Mots-clés : Champ de vitesses Contraintes de cisaillement Collecteur d'assainissement Résumé : The presence of sediment at the bottom of the collectors is of interest for hydraulic and environmental reasons. Design rules enable avoiding silting in a wide range of situation, but are not suited for accurately assessing risk for a particular facility. The stress at the bottom is a determining parameter for the processes of sedimentation and erosion and results from the velocity field in a cross section. This article presents an experimental and numerical approach of the space distribution of the velocities and shear stresses in a collector of sewers network. The results show that, for the narrow channels, it is necessary to take into account the three-dimensional character of the flow. Numerical modeling provides the lower cost for the results that is difficult to acquire in experiments. On the other hand a total evaluation of the average shear stress seems less adapted to describe the reality of shear stress in the section. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...] [article] Champ de vitesses et contraintes de cisaillement dans un collecteur d'assainissement [texte imprimé] / Hossein Bonakdari, Auteur ; Frederique Larrarte, Auteur ; Claude Joannis, Auteur . - 2010 . - pp. 20-25.
Hydraulique
Langues : Français (fre)
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 20-25
Mots-clés : Champ de vitesses Contraintes de cisaillement Collecteur d'assainissement Résumé : The presence of sediment at the bottom of the collectors is of interest for hydraulic and environmental reasons. Design rules enable avoiding silting in a wide range of situation, but are not suited for accurately assessing risk for a particular facility. The stress at the bottom is a determining parameter for the processes of sedimentation and erosion and results from the velocity field in a cross section. This article presents an experimental and numerical approach of the space distribution of the velocities and shear stresses in a collector of sewers network. The results show that, for the narrow channels, it is necessary to take into account the three-dimensional character of the flow. Numerical modeling provides the lower cost for the results that is difficult to acquire in experiments. On the other hand a total evaluation of the average shear stress seems less adapted to describe the reality of shear stress in the section. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...]
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 26-32
Titre : Développement d'un modèle paramétrique à partir d'outils statistiques et numériques, application à l'hydrodynamique de l'embouchure de l'Adour Type de document : texte imprimé Auteurs : Jean Dubranna, Auteur ; Philippe Maron, Auteur Année de publication : 2010 Article en page(s) : pp. 26-32 Note générale : Hydraulique Langues : Français (fre) Mots-clés : Hydrodynamique Embouchure Adour Résumé : Previous studies and field observations showed a relationship between the wave conditions and the Adour river mouth silting rate. Once the existence of favourable hydrodynamical conditions for channel infilling during strong wave events was confirmed, the present study allowed us to establish a strong linear relationship between the off shore swell energy flux and the wave induced current in a particular section of the mouth. Thus, we propose a method to assess the hydrodynamics along the section from the knowledge of the swell energy flux parameter. The ultimate goal of this study is to be able to predict the wave induced current in real time and to compute afterwards the associated sediment fluxes. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...] [article] Développement d'un modèle paramétrique à partir d'outils statistiques et numériques, application à l'hydrodynamique de l'embouchure de l'Adour [texte imprimé] / Jean Dubranna, Auteur ; Philippe Maron, Auteur . - 2010 . - pp. 26-32.
Hydraulique
Langues : Français (fre)
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 26-32
Mots-clés : Hydrodynamique Embouchure Adour Résumé : Previous studies and field observations showed a relationship between the wave conditions and the Adour river mouth silting rate. Once the existence of favourable hydrodynamical conditions for channel infilling during strong wave events was confirmed, the present study allowed us to establish a strong linear relationship between the off shore swell energy flux and the wave induced current in a particular section of the mouth. Thus, we propose a method to assess the hydrodynamics along the section from the knowledge of the swell energy flux parameter. The ultimate goal of this study is to be able to predict the wave induced current in real time and to compute afterwards the associated sediment fluxes. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...]
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 33-38
Titre : Modélisation de la formation et de l'évolution non linéaire des barres en croissant de la cote aquitaine Type de document : texte imprimé Auteurs : Roland Garnier, Auteur ; Philippe Bonneton, Auteur ; Albert Falqués, Auteur Année de publication : 2010 Article en page(s) : pp. 33-38 Note générale : Hydraulique Langues : Français (fre) Mots-clés : Formation non linéaire Evolution non linéaire Barres en croissant Cote aquitaine Résumé : Crescentic bars emerge as free instabilities of the coupling between topography and water motion. Their long term behaviour will be studied in the real case of the French Aquitaine beaches by using the 2DH numerical model MORFO55. For the first time, the equilibrium state of a crescentic bar system is obtained, in the case of steady incident wave conditions. Due to non linear interactions, the final wave length of the system does not inevitably increase with the incident wave height. Finally, the study of variable incident wave conditions suggests that the equilibrium state may depend on the initial conditions. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...] [article] Modélisation de la formation et de l'évolution non linéaire des barres en croissant de la cote aquitaine [texte imprimé] / Roland Garnier, Auteur ; Philippe Bonneton, Auteur ; Albert Falqués, Auteur . - 2010 . - pp. 33-38.
Hydraulique
Langues : Français (fre)
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 33-38
Mots-clés : Formation non linéaire Evolution non linéaire Barres en croissant Cote aquitaine Résumé : Crescentic bars emerge as free instabilities of the coupling between topography and water motion. Their long term behaviour will be studied in the real case of the French Aquitaine beaches by using the 2DH numerical model MORFO55. For the first time, the equilibrium state of a crescentic bar system is obtained, in the case of steady incident wave conditions. Due to non linear interactions, the final wave length of the system does not inevitably increase with the incident wave height. Finally, the study of variable incident wave conditions suggests that the equilibrium state may depend on the initial conditions. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...]
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 39-44
Titre : Expérimentation par IRM et modélisation par éléments finis de la sédimentation-consolidation des vases Type de document : texte imprimé Auteurs : Damien Pham Van Bang, Auteur ; Emmanuel Lefrançois, Auteur ; Philippe Sergent, Auteur Année de publication : 2010 Article en page(s) : pp. 39-44 Note générale : Hydraulique Langues : Français (fre) Mots-clés : Sédimentation Consolidation Expérimentation IRM Eléments finis Capture de choc Rhéologie Résumé : Settling and consolidation of colloidal and non-colloidal suspensions are investigated from a nuclear Magnetic Resonance Imaging (MRI) vertical prototype. The mathematical model of Gibson with a 1D numerical modeling based on the Finite Element Method (FEM) are presented. A time "Lax Wendroff" discretization with a shock capturing technique (Flux Corrected Transport, FCT) is used for the propagation of concentration fronts. Finally comparisons between experiment and simulation are proposed and discussed for the case of non-colloidal and colloidal suspension. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...] [article] Expérimentation par IRM et modélisation par éléments finis de la sédimentation-consolidation des vases [texte imprimé] / Damien Pham Van Bang, Auteur ; Emmanuel Lefrançois, Auteur ; Philippe Sergent, Auteur . - 2010 . - pp. 39-44.
Hydraulique
Langues : Français (fre)
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 39-44
Mots-clés : Sédimentation Consolidation Expérimentation IRM Eléments finis Capture de choc Rhéologie Résumé : Settling and consolidation of colloidal and non-colloidal suspensions are investigated from a nuclear Magnetic Resonance Imaging (MRI) vertical prototype. The mathematical model of Gibson with a 1D numerical modeling based on the Finite Element Method (FEM) are presented. A time "Lax Wendroff" discretization with a shock capturing technique (Flux Corrected Transport, FCT) is used for the propagation of concentration fronts. Finally comparisons between experiment and simulation are proposed and discussed for the case of non-colloidal and colloidal suspension. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...]
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 45-50
Titre : Elaboration du SDAGE du bassin seine Normandie relatif à la gestion de la rareté de la ressource en eau Type de document : texte imprimé Auteurs : Philippe Verjus, Auteur Année de publication : 2010 Article en page(s) : pp. 45-50 Note générale : Hydraulique Langues : Français (fre) Mots-clés : SDAGE Bassin seine Normandie Ressource en eau Résumé : The projects of orientations of the basin management plan concerning the management of the scarcity of the water resource, and in particular groundwater, concretize the implementation of the European directive 2000/60/CE establishing a framework for community action in the field of water policy. The quantitave status of a body of groundwater may have an impact on the ecological quality of surface waters and terrestrial ecosystems associated with that groundwater body. The directive indicates that the quantitative state of groundwater is regarded as good when there is no diminution of the available groundwater resource. The latter is defined as the long-term annual average rate of overall recharge of the body of groundwater less the long-term annual rate of flow required to achieve the ecological quality objectives for associated surface waters and avoid any significant damage to associated terrestrial ecosystem. An analysis of the current quantitative state of groundwater was thus undertaken by distinguishing the type of imbalance. The objective is to distinguish wetlands and small rivers that depend on a specific groundwater level and where the risk of ecological damage is high, from those where this risk is low. The local dialogue prevailed in addition during all the step of development of the proposals. The assessment on Seine Normandie basin leads to the orientations and provisions of the SDAGE concerning the management of aquifer. A dozen groundwater bodies on the about sixty in the basin are the subject of specific provisions of management more or less detailed in the general objective to reach the good quantitative state in 2015. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...] [article] Elaboration du SDAGE du bassin seine Normandie relatif à la gestion de la rareté de la ressource en eau [texte imprimé] / Philippe Verjus, Auteur . - 2010 . - pp. 45-50.
Hydraulique
Langues : Français (fre)
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 45-50
Mots-clés : SDAGE Bassin seine Normandie Ressource en eau Résumé : The projects of orientations of the basin management plan concerning the management of the scarcity of the water resource, and in particular groundwater, concretize the implementation of the European directive 2000/60/CE establishing a framework for community action in the field of water policy. The quantitave status of a body of groundwater may have an impact on the ecological quality of surface waters and terrestrial ecosystems associated with that groundwater body. The directive indicates that the quantitative state of groundwater is regarded as good when there is no diminution of the available groundwater resource. The latter is defined as the long-term annual average rate of overall recharge of the body of groundwater less the long-term annual rate of flow required to achieve the ecological quality objectives for associated surface waters and avoid any significant damage to associated terrestrial ecosystem. An analysis of the current quantitative state of groundwater was thus undertaken by distinguishing the type of imbalance. The objective is to distinguish wetlands and small rivers that depend on a specific groundwater level and where the risk of ecological damage is high, from those where this risk is low. The local dialogue prevailed in addition during all the step of development of the proposals. The assessment on Seine Normandie basin leads to the orientations and provisions of the SDAGE concerning the management of aquifer. A dozen groundwater bodies on the about sixty in the basin are the subject of specific provisions of management more or less detailed in the general objective to reach the good quantitative state in 2015. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...]
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 51-58
Titre : Gestion active de l'eau et territoires Type de document : texte imprimé Auteurs : Michel Buisson, Auteur Année de publication : 2010 Article en page(s) : pp. 51-58 Note générale : Hydraulique Langues : Français (fre) Mots-clés : Gestion active Gestion d'eau et territoires Résumé : We present here the history of the water supply of Lille Urban Community.Due to the past, the organisation of the waterpublic utility is still complicated. To day the production capacity must be reduced in order to respect the sanitary law and there is no more security in the supply chain.Several answers are studied. One of these is the water resources asset management. One aspect of this management consists in local improvement in water quality ; an other in a regional use of the different water supplies at the different seasons. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...] [article] Gestion active de l'eau et territoires [texte imprimé] / Michel Buisson, Auteur . - 2010 . - pp. 51-58.
Hydraulique
Langues : Français (fre)
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 51-58
Mots-clés : Gestion active Gestion d'eau et territoires Résumé : We present here the history of the water supply of Lille Urban Community.Due to the past, the organisation of the waterpublic utility is still complicated. To day the production capacity must be reduced in order to respect the sanitary law and there is no more security in the supply chain.Several answers are studied. One of these is the water resources asset management. One aspect of this management consists in local improvement in water quality ; an other in a regional use of the different water supplies at the different seasons. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...]
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 59-61
Titre : La mise en oeuvre des programmes de mesures des SDAGE par les collectivités : Possibilité d'utiliser les EPTB Type de document : texte imprimé Auteurs : Jean-Luc Roy, Auteur Année de publication : 2010 Article en page(s) : pp. 59-61 Note générale : Hydraulique Langues : Français (fre) Mots-clés : SDAGE EPTB Résumé : The EPTB are French river basin public organization gathering local authorities (cities, Departments or Regions) aiming at facilitating integrated river basin water management.Their vocation is to be the contracting authority who leads concerted studies, works or actions of common interest at river basin scale.For the implementation of a number of actions planned by the SDAGE : SAGE coordination, structuring works management, sub-basin management, etc..., EPTB can be a common intervention tool for concerned local authorities. Some examples of actions actually implemented by EPTB will be given. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...] [article] La mise en oeuvre des programmes de mesures des SDAGE par les collectivités : Possibilité d'utiliser les EPTB [texte imprimé] / Jean-Luc Roy, Auteur . - 2010 . - pp. 59-61.
Hydraulique
Langues : Français (fre)
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 59-61
Mots-clés : SDAGE EPTB Résumé : The EPTB are French river basin public organization gathering local authorities (cities, Departments or Regions) aiming at facilitating integrated river basin water management.Their vocation is to be the contracting authority who leads concerted studies, works or actions of common interest at river basin scale.For the implementation of a number of actions planned by the SDAGE : SAGE coordination, structuring works management, sub-basin management, etc..., EPTB can be a common intervention tool for concerned local authorities. Some examples of actions actually implemented by EPTB will be given. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...]
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 62-67
Titre : Perspectives pour la gestion de la ressource en france Type de document : texte imprimé Auteurs : Hugues Haeffner, Auteur ; Christophe Mouvet, Auteur Année de publication : 2010 Article en page(s) : pp. 62-67 Note générale : Hydraulique Langues : Français (fre) Mots-clés : Gestion de la ressource France Résumé : At the scale of France, quantitative assessments show that the available water resources can globally satisfy the current needs. The rare cases of conflicts of use result mainly from a non-optimized management of the resources. The qualitative assessment indicate that about 30 % of surface water bodies and 40 % of ground water bodies risk not reaching the good quality status by 2015 (deadline set by the WFD). Nitrates and pesticides are a major cause of the failure to reach the good status.The perspectives for active quantitative management depend on economic parameters specific to each use of the resource. An overview of various methods of active quantitative management points at the interest of developing temporary storage and reinfiltration, rather than water transport or desalinization. The promoted saving of drinking water is generally an inappropriate alternative, as it has a non-targeted impact and a collective cost.For qualitative issues, the active management must take place at catchment scale, with actions complementary to the existing legal tools. For nitrate and pesticide, a variety of preventive and curative tools has been applied with various levels of success ; the depuration capacities of wetlands should be put more into use.Be it quantitative or qualitative, the active management of water resources is still hindered by administrative (who must be the main client ?) and technical (univocal relation between actions undertaken and results observed ? delays in obtaining results ?) issues. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...] [article] Perspectives pour la gestion de la ressource en france [texte imprimé] / Hugues Haeffner, Auteur ; Christophe Mouvet, Auteur . - 2010 . - pp. 62-67.
Hydraulique
Langues : Français (fre)
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 62-67
Mots-clés : Gestion de la ressource France Résumé : At the scale of France, quantitative assessments show that the available water resources can globally satisfy the current needs. The rare cases of conflicts of use result mainly from a non-optimized management of the resources. The qualitative assessment indicate that about 30 % of surface water bodies and 40 % of ground water bodies risk not reaching the good quality status by 2015 (deadline set by the WFD). Nitrates and pesticides are a major cause of the failure to reach the good status.The perspectives for active quantitative management depend on economic parameters specific to each use of the resource. An overview of various methods of active quantitative management points at the interest of developing temporary storage and reinfiltration, rather than water transport or desalinization. The promoted saving of drinking water is generally an inappropriate alternative, as it has a non-targeted impact and a collective cost.For qualitative issues, the active management must take place at catchment scale, with actions complementary to the existing legal tools. For nitrate and pesticide, a variety of preventive and curative tools has been applied with various levels of success ; the depuration capacities of wetlands should be put more into use.Be it quantitative or qualitative, the active management of water resources is still hindered by administrative (who must be the main client ?) and technical (univocal relation between actions undertaken and results observed ? delays in obtaining results ?) issues. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...]
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 68-73
Titre : Vers une gestion innovante des bassins versants ruraux pour reconquérir la qualité de l'eau ? le cas de la Bretagne Type de document : texte imprimé Auteurs : Philippe Merot, Auteur ; Pierre Aurousseau, Auteur ; Chantal Gascuel-Odoux, Auteur Année de publication : 2010 Article en page(s) : pp. 68-73 Note générale : Hydraulique Langues : Français (fre) Mots-clés : Gestion de l'eau Gestion spatiale Pollution agricole Zones humides Zone tampon Résumé : A lot of initiatives for improving the water quality were developed for 15 years in Brittany in response to the European policy and the ecologist requests. This implies the partnerships of farmer organisations, organisms in charge of rural affairs and research and formation institutes.The paper presents the 2 major aspects of a possible original and efficient water policy, in the framework of the water management at the catchment scale : 1) developing new methods of water management, including farming activities, to improve the water quality ; 2) developing new methods of pressure and impact assessment taking into account the complexity of a system submitted to a recent and light water policy, a strong hydrological variability and a long response time.In spite of the co-existence of all the constituents of a coherent policy, this policy seems difficult to build up. Current water quality shows the interest and limits of incentive policy. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...] [article] Vers une gestion innovante des bassins versants ruraux pour reconquérir la qualité de l'eau ? le cas de la Bretagne [texte imprimé] / Philippe Merot, Auteur ; Pierre Aurousseau, Auteur ; Chantal Gascuel-Odoux, Auteur . - 2010 . - pp. 68-73.
Hydraulique
Langues : Français (fre)
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 68-73
Mots-clés : Gestion de l'eau Gestion spatiale Pollution agricole Zones humides Zone tampon Résumé : A lot of initiatives for improving the water quality were developed for 15 years in Brittany in response to the European policy and the ecologist requests. This implies the partnerships of farmer organisations, organisms in charge of rural affairs and research and formation institutes.The paper presents the 2 major aspects of a possible original and efficient water policy, in the framework of the water management at the catchment scale : 1) developing new methods of water management, including farming activities, to improve the water quality ; 2) developing new methods of pressure and impact assessment taking into account the complexity of a system submitted to a recent and light water policy, a strong hydrological variability and a long response time.In spite of the co-existence of all the constituents of a coherent policy, this policy seems difficult to build up. Current water quality shows the interest and limits of incentive policy. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...]
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 74-81
Titre : Face à la sécheresse et à la pénurie d'eau, quelles mesures pour ajuster la demande agricole à l'offre de ressource en eau ? Type de document : texte imprimé Auteurs : Philippe Debaeke, Auteur ; Jean-Pierre Amigues, Auteur Année de publication : 2010 Article en page(s) : pp. 74-81 Note générale : Hydraulique Langues : Français (fre) Mots-clés : Demande en eau Irrigation Sécheresse Economie d'eau Expertise scientifique collective Résumé : Since 2003, Center-West and South-West of France are regularly affected by drought events (either edaphic or hydrologic) with dramatic consequences on yield, irrigation water use and farmer's net income.To cope with drought and irrigation water shortage, different strategies are available : (i) fitting water offer to agricultural demand through the mobilisation of new resources ; (ii) fitting water demand to resource offer by genetic, agronomic, regulatory, and socio-economic measures ; (iii) developing local and participative water management programs ; (iv) compensating production or income losses through public subsidies or private insurance systems.In this communication, we present some conclusions drawn from the recent scientific joint expertise conducted by INRA on "Drought and Agriculture" in 2006. Case studies from Poitou-Charentes and Midi-Pyrénées regions were selected. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...] [article] Face à la sécheresse et à la pénurie d'eau, quelles mesures pour ajuster la demande agricole à l'offre de ressource en eau ? [texte imprimé] / Philippe Debaeke, Auteur ; Jean-Pierre Amigues, Auteur . - 2010 . - pp. 74-81.
Hydraulique
Langues : Français (fre)
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 74-81
Mots-clés : Demande en eau Irrigation Sécheresse Economie d'eau Expertise scientifique collective Résumé : Since 2003, Center-West and South-West of France are regularly affected by drought events (either edaphic or hydrologic) with dramatic consequences on yield, irrigation water use and farmer's net income.To cope with drought and irrigation water shortage, different strategies are available : (i) fitting water offer to agricultural demand through the mobilisation of new resources ; (ii) fitting water demand to resource offer by genetic, agronomic, regulatory, and socio-economic measures ; (iii) developing local and participative water management programs ; (iv) compensating production or income losses through public subsidies or private insurance systems.In this communication, we present some conclusions drawn from the recent scientific joint expertise conducted by INRA on "Drought and Agriculture" in 2006. Case studies from Poitou-Charentes and Midi-Pyrénées regions were selected. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...]
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 82-87
Titre : Préservation et exploitation de la nappe de Dijon sud Type de document : texte imprimé Auteurs : Laurence Catherinot, Auteur ; Jerome De Dompsure, Auteur ; Emmanuel Soncourt, Auteur Année de publication : 2010 Article en page(s) : pp. 82-87 Note générale : Hydraulique Langues : Français (fre) Mots-clés : Préservation de la nappe Exploitation de la nappe Dijon sud Résumé : Southern Dijon Aquifer is a large renewable water body of 15 to 20 million m3. It is 20 km long and 2 to 4 km wide. Two aquifer layers are partly separated by a clay layer, and total depth is up to 63m. Water withdrawal started in 1960 but recently faced permanent diffuse pollution problems, originating from upstream industrial activity and agriculture. This would have ended in abandoning drinking water operation without a strong political willingness from local authorities to rehabilitate the groundwater aquifer. From 2003 to 2005, several studies and works have been undertaken. Upstream (Chenôve) water abstraction was continued with activated carbon water treatment, allowing water protection, and monitoring. Dowmstram (Marsannay-la-Côte), wells have been rehabilitated with the objective to avoid pollution transfer between aquifers and to manage water quality by selective abstraction from the two layers. Depending on water quality, upper aquifer water is either used for drinking water production (with pesticide removal treatment) or hydraulic barrier (with stripping treatment before disposal). Volatile organic compounds and hydrocarbons are monitored upstream of water wells. These works have allowed to restore and maintain long term use of the main capacitive aquifer of the area. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...] [article] Préservation et exploitation de la nappe de Dijon sud [texte imprimé] / Laurence Catherinot, Auteur ; Jerome De Dompsure, Auteur ; Emmanuel Soncourt, Auteur . - 2010 . - pp. 82-87.
Hydraulique
Langues : Français (fre)
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 82-87
Mots-clés : Préservation de la nappe Exploitation de la nappe Dijon sud Résumé : Southern Dijon Aquifer is a large renewable water body of 15 to 20 million m3. It is 20 km long and 2 to 4 km wide. Two aquifer layers are partly separated by a clay layer, and total depth is up to 63m. Water withdrawal started in 1960 but recently faced permanent diffuse pollution problems, originating from upstream industrial activity and agriculture. This would have ended in abandoning drinking water operation without a strong political willingness from local authorities to rehabilitate the groundwater aquifer. From 2003 to 2005, several studies and works have been undertaken. Upstream (Chenôve) water abstraction was continued with activated carbon water treatment, allowing water protection, and monitoring. Dowmstram (Marsannay-la-Côte), wells have been rehabilitated with the objective to avoid pollution transfer between aquifers and to manage water quality by selective abstraction from the two layers. Depending on water quality, upper aquifer water is either used for drinking water production (with pesticide removal treatment) or hydraulic barrier (with stripping treatment before disposal). Volatile organic compounds and hydrocarbons are monitored upstream of water wells. These works have allowed to restore and maintain long term use of the main capacitive aquifer of the area. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...]
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 88-96
Titre : Entre création de ressource et mesures réglementaires : Quelle place pour la gestion de la demande en eau d'irrigation en Charente ? Type de document : texte imprimé Auteurs : Sebastien Loubier, Auteur ; Guy Gleyses, Auteur ; Marielle Montginoul, Auteur Année de publication : 2010 Article en page(s) : pp. 88-96 Note générale : Hydraulique Langues : Français (fre) Mots-clés : Charente Gestion de la demande Irrigation Analyse coût efficacité Economie Résumé : Because of an important increase of irrigated area since the 70s, Charente river basin face important imbalance between the available water resources that is very sensible to climatic variability and uses. Favoured by the 1992 French water act, rending the metering progressively obligatory and that recommend dialogue among water actors, a volumetric management mechanism has progressively been implemented, especially in the upstream Charente river basin since the Mas Chaban dam creation that allow to resupply the river. This article presents the volumetric based management instruments implemented in this basin, discusses its effectiveness and propose an alternative management system based on an optional water pricing and on a new water consumption declaration system. We then highlight that this demand management instrument, for a comparable effectiveness, is less costly than the regulatory measures already adopted by river basin authorities and the farmers preferred measure that consist in creating new resources. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...] [article] Entre création de ressource et mesures réglementaires : Quelle place pour la gestion de la demande en eau d'irrigation en Charente ? [texte imprimé] / Sebastien Loubier, Auteur ; Guy Gleyses, Auteur ; Marielle Montginoul, Auteur . - 2010 . - pp. 88-96.
Hydraulique
Langues : Français (fre)
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 88-96
Mots-clés : Charente Gestion de la demande Irrigation Analyse coût efficacité Economie Résumé : Because of an important increase of irrigated area since the 70s, Charente river basin face important imbalance between the available water resources that is very sensible to climatic variability and uses. Favoured by the 1992 French water act, rending the metering progressively obligatory and that recommend dialogue among water actors, a volumetric management mechanism has progressively been implemented, especially in the upstream Charente river basin since the Mas Chaban dam creation that allow to resupply the river. This article presents the volumetric based management instruments implemented in this basin, discusses its effectiveness and propose an alternative management system based on an optional water pricing and on a new water consumption declaration system. We then highlight that this demand management instrument, for a comparable effectiveness, is less costly than the regulatory measures already adopted by river basin authorities and the farmers preferred measure that consist in creating new resources. DEWEY : 553.7 ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...]
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