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Comportement Bilan Et Repartition De Sediments Au Sein Des Systemes Dirrigation
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Book Synopsis Comportement, bilan et répartition de sédiments au sein des systèmes d'irrigation by : Alexandre Vabre
Download or read book Comportement, bilan et répartition de sédiments au sein des systèmes d'irrigation written by Alexandre Vabre and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail de thèse s'inscrit dans un programme de recherche entre le Cemagref, le CEA et l'IWMI. Il vise à étudier les problèmes d'ensablement des systèmes de canaux d'irrigation du Pakistan. En effet, bon nombre de systèmes souffrent d'un ensablement excessif qui perturbent fortement leurs fonctionnements. Une approche pragmatique du problème est adoptée, et la description de l'ensablement est réalisée au moyen de méthodes globales. Ce choix est fait pour permettre aux méthodes et outils développés d'être opérationnels et directement utilisables par les gestionnaires de périmètres irrigués. Une approche de modélisation numérique globale (GSM) est proposée. Elle repose sur des lois classiques du transport solide mais un formalisme nouveau est proposé pour l'expression du dépôt. Celui-ci est une relation entre le taux de piégeage en matières solides d'un bief en fonction de sa capacité de transport solide. A cela sont couplés des critères de découpage du système étudié en biefs homogènes. Une ébauche de GSM est mise en oeuvre sur un jeu de données d'ensablement d'un système réel au Pakistan (Jamrao). Une campagne de mesures au moyen de traceurs radioactivables est ensuite réalisée sur ce site pour compléter les données de travail du GSM. De plus, une telle campagne est à elle seule une méthode de description du phénomène d'ensablement dans le système de canaux d'irrigation. La robustesse des lois de l'approche de modélisation GSM ensuite testée sur un autre site d'étude de système de canaux d'irrigation au Pakistan (Chashma). Les résultats sont très encourageants car le modèle GSM a pu être calé et validé sur plusieurs dynamiques réelles d'ensablement avec des erreurs assez modérées pour un tel outil. De plus, le jeu de données constitué par la campagne de traçage s'est avéré être minimum et suffisant pour mettre en oeuvre le GSM. En outre, il a été possible d'utiliser le GSM pour des applications de gestion des périmètres irrigués. Un critère de conception de canaux stables est proposé. Le GSM a permis aussi d'identifier un scénario d'opérations hydrauliques sur un système de canaux d'irrigation qui diminue le dépôt. Les perspectives de ce travail sont de tester l'approche GSM sur d'autres jeux de données et ainsi de vérifier la robustesse de certaines valeurs seuils, sur les capacités de transport solide notamment, obtenues lors de ces différentes mises en oeuvre.
Book Synopsis Comportement, bilan et répartition de sédiments au sein des périmètres irrigués by : Alexandre Vabre
Download or read book Comportement, bilan et répartition de sédiments au sein des périmètres irrigués written by Alexandre Vabre and published by . This book was released on 2002 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis MODELISATION DES PROCESSUS DE SEDIMENTATION EN CANAL D'IRRIGATION. APPLICATION A LA GESTION ET LA CONCEPTION DES RESEAUX by : GILLES.. BELAUD
Download or read book MODELISATION DES PROCESSUS DE SEDIMENTATION EN CANAL D'IRRIGATION. APPLICATION A LA GESTION ET LA CONCEPTION DES RESEAUX written by GILLES.. BELAUD and published by . This book was released on 2000 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: LA SEDIMENTATION DANS LES CANAUX D'IRRIGATION DU PAKISTAN PERTURBE FORTEMENT LA DISTRIBUTION ET REQUIERT DES COUTS D'ENTRETIEN TRES ELEVES. CE MEMOIRE ETUDIE LE TRANSPORT DES SEDIMENTS AU SEIN DE RESEAUX D'IRRIGATION DANS LE BUT DE MIEUX LES CONCEVOIR OU LES GERER. UNE CAMPAGNE DE MESURES CONDUITE SUR UNE PORTION DE PERIMETRE IRRIGUE DU PAKISTAN PERMET DE CARACTERISER LE FONCTIONNEMENT DE CELUI-CI : APPORTS SOLIDES, GRANULOMETRIE DES MATERIAUX TRANSPORTES ET DEPOSES, FONCTIONNEMENT DES OUVRAGES DE REPARTITION, DYNAMIQUE DE LA SEDIMENTATION. UN MODELE DE SIMULATION HYDRODYNAMIQUE MONODIMENSIONNEL DU TRANSPORT DES SEDIMENTS EST ENSUITE DEVELOPPE. IL PERMET DE REPRESENTER LE TRANSPORT ET LE DEPOT DES SEDIMENTS, L'EVOLUTION DU LIT, LA REPARTITION AUX OUVRAGES DE DISTRIBUTION. AU SEIN D'UN BIEF, L'EVOLUTION DES CHARGES SOLIDES REPOSE SUR UNE LOI DE TRANSPORT A L'EQUILIBRE COUPLEE A UNE LOI DE CHARGEMENT ; AUX DIFFLUENCES, LE MODELE DE REPARTITION UTILISE UNE APPROCHE MECANISTE. ON DISTINGUE LES DYNAMIQUES DES DIFFERENTES CLASSES TRANSPORTEES. LE MODELE EST CALE POUR PLUSIEURS LOIS DE TRANSPORT, VALIDE ET ANALYSE SUR UN CANAL DISTRIBUTEUR DU PAKISTAN. LES APPLICATIONS A LA MAINTENANCE ET LA CONCEPTION DES RESEAUX D'IRRIGATION SONT PRESENTEES SUR TROIS CAS CONCRETS OU LE MODELE EST DANS UN PREMIER TEMPS CALE ET DISCUTE. L'OUTIL DEVELOPPE PEUT ALORS ETRE UTILISE POUR AMELIORER LA STRATEGIE DU CURAGE ET LA CONCEPTION D'UN PERIMETRE OU COMPARER PLUSIEURS SCENARIOS DE GESTION.
Book Synopsis Water & Heritage by : Willem Willems
Download or read book Water & Heritage written by Willem Willems and published by . This book was released on 2017-01-15 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water is vital for life, and its availability has been a concern for mankind throughout the ages. Its presence has always been ascertained in a variety of ways and the development of human society everywhere is connected with various forms of water management. Man also needed to manage water to find protection from its dangers and the need for that is increasing. In the coming decades, the impact of climate change is expected to intensify floods and droughts, affect groundwater resources, raise sea levels, increase pollution and enhance the frequency and magnitude of disasters. Societies around the world are challenged to adapt to these threats to ensure water security, economic prosperity and environmental and cultural sustainability. This book deals with the heritage of water management and the use that was made of water, as well as the impact of water management on heritage. An example of the former may be an ancient irrigation system in the Filipines or in the Middle East that still functions today, while the latter may reflect the importance of maintaining groundwater levels for the preservation of organic remains on archaeological sites or of wooden piles underneath standing buildings. In either case the papers in this book reflect the dynamic nature of water, and hence the equally dynamic relation between water management and heritage. This publication follows up on a Heritage and Water conference in Amsterdam, the first of its kind. Its main purpose is to credibly present the importance and value of heritage and historical experience for water and sustainable development, and vice versa, present the importance of water management for the protection of heritage. It presents evolving insights and concepts about Water and about Heritage from a variety of disciplines, policy and public perspectives illustrated with cases studies and aims to connect decision makers with experts such as engineers, archaeologists, historians, geographers, ecologist and landscape architects
Book Synopsis Faecal Sludge Management by : Linda Strande
Download or read book Faecal Sludge Management written by Linda Strande and published by IWA Publishing. This book was released on 2014-08-15 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is estimated that literally billions of residents in urban and peri-urban areas of Africa, Asia, and Latin America are served by onsite sanitation systems (e.g. various types of latrines and septic tanks). Until recently, the management of faecal sludge from these onsite systems has been grossly neglected, partially as a result of them being considered temporary solutions until sewer-based systems could be implemented. However, the perception of onsite or decentralized sanitation technologies for urban areas is gradually changing, and is increasingly being considered as long-term, sustainable options in urban areas, especially in low- and middle-income countries that lack sewer infrastructures. This is the first book dedicated to faecal sludge management. It compiles the current state of knowledge of the rapidly evolving field of faecal sludge management, and presents an integrated approach that includes technology, management, and planning based on Sandecs 20 years of experience in the field. Faecal Sludge Management: Systems Approach for Implementation and Operation addresses the organization of the entire faecal sludge management service chain, from the collection and transport of sludge, and the current state of knowledge of treatment options, to the final end use or disposal of treated sludge. The book also presents important factors to consider when evaluating and upscaling new treatment technology options. The book is designed for undergraduate and graduate students, and engineers and practitioners in the field who have some basic knowledge of environmental and/or wastewater engineering.
Book Synopsis Dictionary of Building and Civil Engineering by : Don Montague
Download or read book Dictionary of Building and Civil Engineering written by Don Montague and published by Taylor & Francis. This book was released on 1996 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.
Book Synopsis Cropping Systems, Land Tenure and Social Diversity in Wenchi, Ghana by : Samuel Adjei-Nsiah
Download or read book Cropping Systems, Land Tenure and Social Diversity in Wenchi, Ghana written by Samuel Adjei-Nsiah and published by . This book was released on 2006 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: However, there is still considerable scope for further development of these self-organised innovations.
Download or read book Terra 2008 written by Leslie Rainer and published by Getty Publications. This book was released on 2011-06-14 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earthen architecture constitutes one of the most diverse forms of cultural heritage and one of the most challenging to preserve. It dates from all periods and is found on all continents but is particularly prevalent in Africa, where it has been a building tradition for centuries. Sites range from ancestral cities in Mali to the palaces of Abomey in Benin, from monuments and mosques in Iran and Buddhist temples on the Silk Road to Spanish missions in California. This volume's sixty-four papers address such themes as earthen architecture in Mali, the conservation of living sites, local knowledge systems and intangible aspects, seismic and other natural forces, the conservation and management of archaeological sites, research advances, and training.
Book Synopsis Heritage Sites of Astronomy and Archaeoastronomy in the Context of the UNESCO World Heritage Convention by : Clive L. N. Ruggles
Download or read book Heritage Sites of Astronomy and Archaeoastronomy in the Context of the UNESCO World Heritage Convention written by Clive L. N. Ruggles and published by Ocarina Books. This book was released on 2012 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Thematic Study is a joint venture between ICOMOS, the advisory body to UNESCO on cultural sites, and the International Astronomical Union. It presents an overall vision on astronomical heritage, attempts to identify what constitutes "outstanding universal significance to humankind" in relation to astronomy, and identifies broad issues that could arise in the assessment of cultural properties relating to astronomy. This is the first Thematic Study in any field of science heritage. It is elaborated using examples of properties from around the world, including some already on the World Heritage List or national Tentative Lists. The subject matter ranges from early prehistory to modern astrophysics and space heritage, and also prominently includes dark sky issues and modern observatory sites. An e-version of the Thematic Study was published in June 2010 in time to be presented to the 2010 meeting of UNESCO's World Heritage Committee, where it was duly approved. It has been circulated officially by the WHC to all of UNESCO's National Commissions. This full-colour paperback edition with some updates, and reformatted to new ICOMOS standards, was published in 2011 and is now offered for public sale.
Book Synopsis Hydrology of Mediterranean and Semiarid Regions by : Eric Servat
Download or read book Hydrology of Mediterranean and Semiarid Regions written by Eric Servat and published by . This book was released on 2003 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Traditional Mediterranean Architecture by : Amin Maalouf
Download or read book Traditional Mediterranean Architecture written by Amin Maalouf and published by . This book was released on 2002 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water Saving in Agriculture written by and published by . This book was released on 2008 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Food and Agriculture Organization of the United Nations Publisher :Food & Agriculture Org. ISBN 13 :9789251045411 Total Pages :20 pages Book Rating :4.0/5 (454 download)
Book Synopsis What is the Code of Conduct for Responsible Fisheries? by : Food and Agriculture Organization of the United Nations
Download or read book What is the Code of Conduct for Responsible Fisheries? written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2001 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: The actual Code of conduct is also available (1996) (ISBN 9251038341).
Download or read book El Niño written by Bruno Voituriez and published by UNESCO. This book was released on 2000 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: El Nino, caprice of the heavens, scapegoat for every calamity? The general public cannot really understand what is behind the El Nino phenomenon. The book offers a tour of the Earth's climate to understand one of its normal but extreme components.
Book Synopsis World Atlas of Desertification by : United Nations Environment Programme
Download or read book World Atlas of Desertification written by United Nations Environment Programme and published by Hodder Arnold. This book was released on 1997 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: The World Atlas of Desertification summarises the state of scientific knowledge on the drylands of the globe. Representing in graphic form the current stage of our understanding of desertification, as well as its extent and possible solutions, it contains an extraordinary amount of information of value to students and experts alike. The Atlas clearly shows that desertification is one of the world's most pressing environmental problems, and that it is a truly global issue. Since the publication of the first edition in 1992, over 100 countries have ratified the United Nations Convention to Combat Desertification. This 2nd edition reflects major advances in our understanding of desertification over the past few years and has been thoroughly revised and expanded to almost twice its original size. Because combating desertification involves all aspects of environmental issues, this edition covers a broader range of topics, including concerns surrounding poverty, biodiversity, climate change and the availability of water. Social and economic conditions also have a major impact on the progress and control of desertification and this edition contains the latest information on population movements which result from, and lead to desertification. Desertification directly affects the livelihoods of more than one billion people who are directly dependent on the land for their survival. Using the latest updated digitised maps of desertification and fully referenced throughout, this Atlas is essential reading for everyone concerned with the drylands and their people.
Book Synopsis Magmatism and the Causes of Continental Break-up by : Bryan C. Storey
Download or read book Magmatism and the Causes of Continental Break-up written by Bryan C. Storey and published by Geological Society of America. This book was released on 1992 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plant Ecology written by Unesco and published by . This book was released on 1955 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
