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Author: Charles Perrin
Publisher:
ISBN:
Category :
Languages : fr
Pages : 530
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Book Description
IL EXISTE ACTUELLEMENT UN GRAND NOMBRE DE MODELES HYDROLOGIQUES CONCEPTUELS OU EMPIRIQUES GLOBAUX PERMETTANT DE SIMULER LA TRANSFORMATION DE LA PLUIE EN DEBIT A L'ECHELLE DU BASSIN VERSANT. NOTRE ETUDE COMPARATIVE A PERMIS DE TESTER 38 STRUCTURES DE MODELES SUR UN LARGE ECHANTILLON DE 429 BASSINS VERSANTS SITUES EN FRANCE, AUX ETATS-UNIS, EN AUSTRALIE, EN COTE D'IVOIRE ET AU BRESIL. LES STRUCTURES ONT TOUTES ETE EVALUEES DANS LE MEME CADRE DE TEST, AVEC LES MEMES DONNEES D'ENTREE. LEURS PARAMETRES ONT ETE CALES PAR UNE METHODE D'OPTIMISATION LOCALE QUI A PROUVE DE BONNES CAPACITES A IDENTIFIER UN OPTIMUM SATISFAISANT. LES PERFORMANCES EN TERME DE QUALITE DES SIMULATIONS DES DEBITS OBSERVES ONT ETE EVALUEES GRACE A UN ENSEMBLE DE CRITERES QUANTITATIFS, DONT CERTAINS CORRESPONDENT A DES FORMULATIONS NOUVELLES. LES TESTS REALISES INDIQUENT QU'UN FAIBLE NOMBRE DE PARAMETRES LIBRES (3 A 5) EST SUFFISANT POUR OBTENIR DES RESULTATS AUSSI SATISFAISANTS QUE DES STRUCTURES AVEC UN PLUS GRAND NOMBRE DE DEGRES DE LIBERTE, L'AUGMENTATION DE LEUR NOMBRE LIMITANT LA ROBUSTESSE DU MODELE. PAR AILLEURS, LA STRUCTURE DU MODELE JOUE UN ROLE PREPONDERANT SUR LA QUALITE DES SIMULATIONS. CERTAINS OUTILS MATHEMATIQUES CONTENUS DANS DIFFERENTES STRUCTURES APPARAISSENT COMPLEMENTAIRES ET LEUR ASSOCIATION AU SEIN D'UN MEME MODELE PERMET D'AMELIORER LES SIMULATIONS DE DEBIT. LA STRUCTURE DU MODELE SIMPLE GR3J A AINSI PU ETRE MODIFIEE POUR OBTENIR UNE STRUCTURE A QUATRE PARAMETRES PLUS SATISFAISANTE, AVEC NOTAMMENT UNE MEILLEURE SIMULATION DES ETIAGES.
Author: Charles Perrin
Publisher:
ISBN:
Category :
Languages : fr
Pages : 530
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Book Description
IL EXISTE ACTUELLEMENT UN GRAND NOMBRE DE MODELES HYDROLOGIQUES CONCEPTUELS OU EMPIRIQUES GLOBAUX PERMETTANT DE SIMULER LA TRANSFORMATION DE LA PLUIE EN DEBIT A L'ECHELLE DU BASSIN VERSANT. NOTRE ETUDE COMPARATIVE A PERMIS DE TESTER 38 STRUCTURES DE MODELES SUR UN LARGE ECHANTILLON DE 429 BASSINS VERSANTS SITUES EN FRANCE, AUX ETATS-UNIS, EN AUSTRALIE, EN COTE D'IVOIRE ET AU BRESIL. LES STRUCTURES ONT TOUTES ETE EVALUEES DANS LE MEME CADRE DE TEST, AVEC LES MEMES DONNEES D'ENTREE. LEURS PARAMETRES ONT ETE CALES PAR UNE METHODE D'OPTIMISATION LOCALE QUI A PROUVE DE BONNES CAPACITES A IDENTIFIER UN OPTIMUM SATISFAISANT. LES PERFORMANCES EN TERME DE QUALITE DES SIMULATIONS DES DEBITS OBSERVES ONT ETE EVALUEES GRACE A UN ENSEMBLE DE CRITERES QUANTITATIFS, DONT CERTAINS CORRESPONDENT A DES FORMULATIONS NOUVELLES. LES TESTS REALISES INDIQUENT QU'UN FAIBLE NOMBRE DE PARAMETRES LIBRES (3 A 5) EST SUFFISANT POUR OBTENIR DES RESULTATS AUSSI SATISFAISANTS QUE DES STRUCTURES AVEC UN PLUS GRAND NOMBRE DE DEGRES DE LIBERTE, L'AUGMENTATION DE LEUR NOMBRE LIMITANT LA ROBUSTESSE DU MODELE. PAR AILLEURS, LA STRUCTURE DU MODELE JOUE UN ROLE PREPONDERANT SUR LA QUALITE DES SIMULATIONS. CERTAINS OUTILS MATHEMATIQUES CONTENUS DANS DIFFERENTES STRUCTURES APPARAISSENT COMPLEMENTAIRES ET LEUR ASSOCIATION AU SEIN D'UN MEME MODELE PERMET D'AMELIORER LES SIMULATIONS DE DEBIT. LA STRUCTURE DU MODELE SIMPLE GR3J A AINSI PU ETRE MODIFIEE POUR OBTENIR UNE STRUCTURE A QUATRE PARAMETRES PLUS SATISFAISANTE, AVEC NOTAMMENT UNE MEILLEURE SIMULATION DES ETIAGES.
Author: Don Montague
Publisher: Taylor & Francis
ISBN: 9780419199106
Category : Architecture
Languages : en
Pages : 472
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Book Description
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.
Author: Shailesh Kumar Singh
Publisher: Springer
ISBN: 3030021971
Category : Science
Languages : en
Pages : 255
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Book Description
This book offers a comprehensive overview of the challenges in hydrological modeling. Hydrology, on both a local and global scale, has undergone dramatic changes, largely due to variations in climate, population growth and the associated land-use and land-cover changes. Written by experts in the field, the book provides decision-makers with a better understanding of the science, impacts, and consequences of these climate and land-use changes on hydrology. Further, offering insights into how the changing behavior of hydrological processes, related uncertainties and their evolution affect the modeling process, it is of interest for all researchers and practitioners using hydrological modeling.
Author: Eric Servat
Publisher:
ISBN: 9781901502121
Category : Arid regions
Languages : fr
Pages : 518
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Book Description
Author: Stuart Hill
Publisher: Birkhäuser
ISBN: 3034863101
Category : Science
Languages : en
Pages : 364
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Book Description
Author: Deryle Lonsdale
Publisher: Routledge
ISBN: 1135973504
Category : Foreign Language Study
Languages : en
Pages : 974
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Book Description
A Frequency Dictionary of French is an invaluable tool for all learners of French, providing a list of the 5000 most frequently used words in the language. Based on a 23-million-word corpus of French which includes written and spoken material both from France and overseas, this dictionary provides the user with detailed information for each of the 5000 entries, including English equivalents, a sample sentence, its English translation, usage statistics, and an indication of register variation. Users can access the top 5000 words either through the main frequency listing or through an alphabetical index. Throughout the frequency listing there are thematically-organized lists of the top words from a variety of key topics such as sports, weather, clothing, and family terms. An engaging and highly useful resource, the Frequency Dictionary of French will enable students of all levels to get the most out of their study of French vocabulary. Former CD content is now available to access at www.routledge.com/9780415775311 as support material. Designed for use by corpus and computational linguists it provides the full text in a format that researchers can process and turn into suitable lists for their own research work. Deryle Lonsdale is Associate Professor in the Linguistics and English Language Department at Brigham Young University (Provo, Utah). Yvon Le Bras is Associate Professor of French and Department Chair of the French and Italian Department at Brigham Young University (Provo, Utah).
Author: Gert A. Schultz
Publisher: Springer Science & Business Media
ISBN: 3642595839
Category : Science
Languages : en
Pages : 498
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Book Description
The book provides comprehensive information on possible applications of remote sensing data for hydrological monitoring and modelling as well as for water management decisions. Mathematical theory is provided only as far as it is necessary for understanding the underlying principles. The book is especially timely because of new programs and sensors that are or will be realised. ESA, NASA, NASDA as well as the Indian and the Brazilian Space Agency have recently launched satellites or developed plans for new sensor systems that will be especially pertinent to hydrology and water management. New techniques are presented whose structure differ from conventional hydrological models due to the nature of remotely sensed data.
Author: Trevor Daniell
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 500
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Book Description
Proceedings of the FRIEND-Water conference held in Montpellier in October 2014.
Author: Hermann Michaelis
Publisher:
ISBN:
Category : English language
Languages : en
Pages : 486
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Book Description
Author: Joel Gat
Publisher: World Scientific
ISBN: 1860940358
Category : Science
Languages : en
Pages : 198
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Book Description
Within the realm of the newly evolving discipline of environmental sciences, the stable-isotope methodology is being used to an ever-increasing extent, especially in the study of the water cycle and of paleo-climatology. This book introduces the rules of the game, by reviewing the natural variability of stable isotopes in the hydrosphere, describing the physico-chemical basis of isotope fractionation, and applying this knowledge to natural waters as they move through the hydrologic cycle from the ocean to the atmosphere, the biosphere and the lithosphere. There is a special focus on the processes at the surface?atmosphere and land?biosphere?atmosphere interfaces, since these are the sites of major changes in isotope composition. In response to the increasing awareness of our changing climate, a discussion on the global view of the changing water cycle, in the past and future, winds up the presentation.
