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Les tufs et travertins en Périgord-Quercy

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ISBN: 9791030003796 DOI: 10.4000/books.pub.1094 Language: French
Publisher: Presses Universitaires de Bordeaux
Subject: Science (General)
Added to DOAB on : 2019-12-06 13:15:42
License: OpenEdition Licence for Books

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Cet ouvrage aborde l'étude des travertins, dépôts carbonatés d'origine karstique et qui se sont révélés être de remarquables enregistreurs environnementaux. Trois approches organisent cet ouvrage : tout d'abord, le cadre géomorphologique et naturel du Périgord-Quercy est précisé. Il contient une analyse géomorphologique du Périgord Quercy, précise les héritages paléomorphologiques et le cadre naturel de chaque dépôt. Puis dans un deuxième temps, l'analyse sédimentologique livre un certain nombre de marqueurs contenus dans des dépôts clés au niveau régional, notamment en malacofaune. Le rôle du vivant dans l'édification des dépôts est remis en perspective par le biais des calcimétries et de la composition des dépôts. Enfin dans un troisième temps, c'est le fonctionnement actuel des travertins qui est abordé au travers de l'hydrochimie et de l'hydrodynamique, pour les dépôts de source et de vallées. Une conclusion clôt l'ouvrage où sont synthétisés les principaux apports de cette étude.

Les karsts des régions climatiques extrêmes

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ISBN: 9791030003789 DOI: 10.4000/books.pub.1016 Language: French
Publisher: Presses Universitaires de Bordeaux
Subject: Science (General)
Added to DOAB on : 2019-12-06 13:15:42
License: OpenEdition Licence for Books

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Par les karsts des “Pays extrêmes”, on entend là ceux qui connaissent des situations exceptionnelles sur la planète, notamment par leurs caractéristiques climatiques - froid intense, pluviosité abondante ou au contraire sécheresse drastique Les travaux sur ces questions sont rares. Pourtant, dans ces “Pays extrêmes”, les karsts sont présents, avec (presque) toutes leurs caractéristiques - dolines, grottes, réseaux souterrains -, mais aussi leurs spécificités originales. Les géomorphologues, les géologues et les spéléologues y trouveront matière à intérêt pour leurs éventuelles missions et expéditions. Quant aux simples curieux, ils pourront, ne fut-ce qu'à travers les figures et les illustrations, trouver dans ces pages matière à rêverie.

Karsts et évolutions climatiques : Hommage à Jean Nicod

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ISBN: 9791030003864 DOI: 10.4000/books.pub.10814 Language: French
Publisher: Presses Universitaires de Bordeaux
Subject: Science (General)
Added to DOAB on : 2019-12-06 13:15:42
License: OpenEdition Licence for Books

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Publié en hommage à Jean NICOD, karstologue français de réputation internationale, "Karst et Évolutions Climatiques" a aussi pour but de faire le point sur l'évolution d'une science neuve issue notamment de la géomorphologie, de la spéléologie et de l'hydrogéologie. Après un rappel de l'histoire de la Karstologie française de 1900 à 1992, plusieurs scientifiques s'interrogent sur la problématique et la limite de validité des concepts de la géomorphologie climatique. La variété des paysages calcaires et des systèmes karstiques est remarquable à l'échelle de la planète en raison du rôle combiné des paramètres litho-stratigraphiques, tectoniques, géomorphologiques et climatiques. On voyage ainsi de la naissance de la karstification sur les atolls coralliens jusqu'aux karsts subpolaires de Sibérie et du Spitzberg en passant par les karsts tropicaux, méditerranéens et alpins. Mais le karst a une dimension supplémentaire représentée par l'ensemble des réseaux souterrains, conduits et fissures. Cette interdépendance entre spéléologie et karstologie de surface est de plus en plus prise en compte par les chercheurs qui privilégient, à juste titre, l'étude des remplissages endokarstiques, véritables archives de l'Environnement, dont l'importance a été accrue ces dernières décennies par les possibilités de datations, notamment isotopiques. L'ouvrage se termine par une synthèse des karsts et paléokarsts du Périgord et du Quercy, car ils constituent un des exemples d'évolution karstique à long terme (depuis la fin de l'ère secondaire) les mieux connus. Au total, 35 articles de scientifiques étrangers et français qui permettent de juger de la richesse des terrains karstiques, des concepts renouvelés de la Karstologie et des perspectives de recherches. Essentiellement axé sur la recherche fondamentale, cet ouvrage comporte plusieurs articles de synthèse et ouvre grand la porte aux études appliquées ; en effet on ne peut parler d'Environnement avec compétence que si l'on connaît le fonctionnement du milieu naturel avec ou sans l'impact de l'Homme.

La Haute Montagne calcaire : Karsts, Cavités, Remplissages, Quaternaires, Paléoclimats

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ISBN: 9791030003871 DOI: 10.4000/books.pub.11090 Language: French
Publisher: Presses Universitaires de Bordeaux
Subject: Science (General)
Added to DOAB on : 2019-12-06 13:15:42
License: OpenEdition Licence for Books

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La Haute Montagne calcaire reprend, sous un titre plus général, l'essentiel d'une thèse d'Etat soutenue devant l'Université de Nice le 2 février 1990. Ce livre abondamment illustré (331 photos, 394 figures, 77 tableaux) permet aux spécialistes des sciences de la Terre, comme aux spéléologues et aux naturalistes, de plonger dans les arcanes d'un milieu naturel méconnu (car souvent difficile d'accès), l'un des derniers refuges de l'exploration.

Le karst du Yucatan : Pays des Mayas

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ISBN: 9791030003840 DOI: 10.4000/books.pub.1527 Language: French
Publisher: Presses Universitaires de Bordeaux
Subject: Science (General)
Added to DOAB on : 2019-12-06 13:15:42
License: OpenEdition Licence for Books

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Par sa maîtrise parfaite des traitements d'images, par sa connaissance des techniques de laboratoire les plus modernes, et surtout par son approche méthodique du terrain, l'auteur de cet ouvrage apporte certainement la meilleure étude française du milieu naturel yucatèque, avec des informations inédites sur la spéléologie et la géomorphologie karstique tropicale, le volcanisme régional ou encore les variations du niveau de la mer dans la région caraïbe.

Recent Advances in GPR Imaging

Authors: ---
ISBN: 9783039218103 / 9783039218110 Year: Pages: 216 DOI: 10.3390/books978-3-03921-811-0 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Physics (General) --- Geophysics and Geomagnetism
Added to DOAB on : 2019-12-09 11:49:16
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The Special Issue (SI) “Recent Advances in GPR Imaging” offers an up-to-date overview of state-of-the-art research activities dealing with the development of Ground Penetrating Radar (GPR) technology and its recent advances in imaging in the different fields of application. In fact, the advances experimented with over the last few decades with regard to the appearance of new GPR systems and the need to manage large amounts of data suggest an increasing interest in the development of new signal processing algorithms and modeling, as well as in the use of three-dimensional (3D) imaging techniques.

Seedling Production and Field Performance of Seedlings

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ISBN: 9783039212552 / 9783039212569 Year: Pages: 192 DOI: 10.3390/books978-3-03921-256-9 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General)
Added to DOAB on : 2019-12-09 11:49:15
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Rapid establishment of seedlings in forest regeneration or afforestation sites after planting is a prerequisite for a successful reforestation. Seedling survival after outplanting can be improved by using high-quality seedling material. Seedling quality consists of several features, such as genetic source, morphological properties, nutritional status, stress resistance, and vitality of the seedlings. Field performance of the seedlings is a complex process which can be affected by many nursery and silvicultural practices. Nursery cultural practices strongly affect seedling quality, which is generally at its highest level during the growth period at the nursery. Afterwards, when the seedlings are transported from the nursery to the planting site (including seedling storage, handling, shipping, and planting practices), the quality of seedlings can only remain the same or decline. To ensure successful regeneration, it is important to produce seedlings that retain their high quality until planting, and to establish them quickly in the forest regeneration site.

Tropical Forest Ecology and Management for the Anthropocene

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ISBN: 9783039219643 / 9783039219650 Year: Pages: 242 DOI: 10.3390/books978-3-03921-965-0 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General)
Added to DOAB on : 2020-01-07 09:08:26
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This Special Issue looks forward as well as backward to best analyze the forest conservation challenges of the Caribbean. This is made possible by 75 years of research and applications by the United States Department of Agriculture, International Institute of Tropical Forestry (the Institute) of Puerto Rico. It transforms Holocene-based scientific paradigms of the tropics into Anthropocene applications and outlooks of wilderness, managed forests, and urban environments. This volume showcases how the focus of the Institute’s programs is evolving to support sustainable tropical forest conservation despite uncertain conditions. The manuscripts showcased here highlight the importance of shared stewardship and a long-term, hands-on approach to conservation, research programs, and novel organizations intended to meet contemporary conservation challenges. Policies relevant to the Anthropocene, as well as the use of experiments to anticipate future responses of tropical forests to global warming, are reexamined in these pages. Urban topics include how cities can co-produce new knowledge to spark sustainable and resilient transformations. Long-term results and research applications of topics such as soil biota, migratory birds, tropical vegetation, substrate chemistry, and the tropical carbon cycle are also described in the volume. Moreover, the question of how to best use land on a tropical island is addressed. This volume is intended to be of interest to all actors involved in long-term sustainable forest management and research in light of the historical lessons and future directions that may come out of a better understanding of tropical cities and forests in the Anthropocene epoch.

Keywords

Anthropocene --- Forest Service --- vision --- contemporary conservation --- biomass --- allometry --- volume expansion factors --- soil organic carbon --- tropical forest area --- forest inventory data --- novel forests --- tree plantations --- secondary forests --- mature forests --- dry tropical forests --- humid tropical forests --- tropical deforestation --- annual cycle --- carry over effects --- climate change --- Guánica --- Nearctic-Neotropical --- novel forests --- stoichiometry of leaf litter --- nitrogen fixing trees --- naturalized species --- C/N --- C/P --- and N/P ratios --- Puerto Rico --- Caribbean --- element concentration in leaf litter --- succession --- species dominance --- tropical forests --- invertebrates --- microbiota --- soil biota --- litter --- wood --- latitude --- elevation --- disturbance --- gradients --- tropical karst --- element concentration --- N/P ratios --- Ca/Al relationship --- ?13C --- ?15N --- knowledge co-production --- idiom of co-production --- knowledge infrastructures --- knowledge systems --- knowledge systems analysis --- cities --- land use governance --- Anthropocene --- disturbance --- hurricane --- succession --- long-term --- basal area --- species composition --- trees --- tropical --- Luquillo Experimental Forest --- Caribbean --- land use planning --- tropical agriculture --- tropical forests --- geospatial analyses --- n/a --- landscape conservation --- network governance --- strategic teams --- communications --- leadership --- adaptive management --- tropical forest --- Anthropocene --- U.S. Forest Service Planning Rule --- El Yunque National Forest --- Luquillo Experimental Forest --- introduced species --- leaf C and N densities --- novel forests --- photosynthetic nitrogen use-efficiency --- leaf mass per area --- Tropical Forestry Research --- Long-Term Ecological Research --- Tropical Forest Management --- Tropical Forest Conservation --- Luquillo Experimental Forest --- tropical --- experiments --- manipulations --- large-scale --- Puerto Rico --- Caribbean --- conservation --- American tropics --- long-term ecological research --- tropical forest management --- Anthropocene --- Puerto Rico

Climate Variability and Climate Change Impacts on Land Surface, Hydrological Processes and Water Management

Authors: --- ---
ISBN: 9783039215072 / 9783039215089 Year: Pages: 460 DOI: 10.3390/books978-3-03921-508-9 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Environmental Sciences
Added to DOAB on : 2019-12-09 11:49:15
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During the last several decades, Earth´s climate has undergone significant changes due to anthropogenic global warming, and feedbacks to the water cycle. Therefore, persistent efforts are required to improve our understanding of hydrological processes and to engage in efficient water management strategies that explicitly consider changing environmental conditions. The twenty-four contributions in this book have broadly addressed topics across four major research areas: (1) Climate and land-use change impacts on hydrological processes, (2) hydrological trends and causality analysis faced in hydrology, (3) hydrological model simulations and predictions, and (4) reviews on water prices and climate extremes. The broad spectrum of international contributions to the Special Issue indicates that climate change impacts on water resources analysis attracts global attention. We hope that the collection of articles presented here can provide scientists, policymakers and stakeholders alike with insights that support sustainable decision-making in the face of climate change and increasingly scarce environmental resources.

Keywords

hydrological drought --- Three Gorges Dam --- GRACE --- compound extremes --- climate change --- multivariate distribution --- quantile regression --- indicator --- PUB --- rainfall-runoff experiments --- distributed hydrological model --- Hydro-Informatic Modelling System (HIMS) --- freshwater availability --- runoff --- simulated rainfall --- plot scale --- litter layer --- topsoil --- karst --- Yellow River Delta --- estuarine wetlands --- spatiotemporal change analysis --- remote sensing --- intra-annual climate change --- variation in percentage of flood-season precipitation --- natural streamflow variation --- contribution and sensitivity analysis --- Yellow River --- highland agricultural field area --- diffuse pollutant discharge --- multiple regression model --- climate change --- jackknife validation --- water security --- water pricing --- sustainable water management --- trends and patterns --- economics --- precipitation --- air temperature --- river discharge --- Mann-Kendall test --- Selenga river basin --- Lake Baikal basin --- Mongolia --- snowfall to precipitation ratio --- WRF model --- arid region --- Xinjiang --- water resources management --- climate change --- LULCC --- Budyko equation --- streamflow --- drought --- climate variability --- land surface change --- runoff --- Budyko framework --- elasticity coefficient --- Weihe River Basin --- flood --- streamflow --- CMIP5 --- climate change --- HEC-RAS --- trend analysis --- precipitation --- temperature --- eco-region --- Ethiopia --- Three Gorges Project --- dam --- runoff changes --- flood control --- Yangtze River --- benefits --- evapotranspiration --- Pan evaporation --- TFPW-MK --- Haihe River Basin --- hydrological simulation --- quantitative analysis --- SWAT model --- land use/cover change --- climate change --- scenario simulation --- Climate variability --- Large-scale climate indices --- Reservoir inflow forecasting --- Ensemble empirical mode decomposition --- Time series model --- Artificial intelligence model --- grid-based --- HRU-based --- SHM --- SWAT --- large scale basin --- climate change --- human activities --- power operations --- cascade joint operation chart --- inter-basin water transfer project --- climate change --- MATOPIBA agricultural frontier --- water security --- hydroclimatic analysis --- water conflicts --- average annual runoff --- runoff map --- hydrological model --- GIS --- DPR Korea --- streamflow reduction --- climate change --- coal mining --- SWCM --- coal mining concentrated watershed --- the Loess Plateau --- hydrology --- land cover --- land use and climate change --- water resources management --- macro scale modeling --- climate variability --- climate change --- land use change --- hydrological processes --- trends --- water management --- model --- predictions

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