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Caractérisation de l'activité hydrosédimentaire dans le Système Turbiditique du Var (NO Méditerranée) et de son enregistrement dans l'archive sédimentaire ArchiMer
Mas, Virginie.
In the framework of the HERMES European project, this study aims to characterize the sedimentary processes acting in the Var turbiditic system, their impact on the morphology, and their evolution through time and space. This work uses data acquired along the system, including interface cores, acoustic data, and measurement in the water column (temperature, particulate fluxes, speed and direction of the currents) thanks to mooring lines. The Var turbiditic system is under the influences of the Northern Current and of the Var river by a direct connection. Sedimentary processes are related to gravity-driven currents, oceanic currents which remobilizes sediments and hemipelagic decantation. Gravity-driven processes are dominant and are responsible of 80% of...
Tipo: Text Palavras-chave: Var; Méditerranée; Bassin Ligure; Système turbiditique; Processus gravitaires; Courant de turbidité; Hyperpycnal; Crue; Var; Méditerranée; Ligurian Basin; Turbiditic system; Gravity-driven flows; Turbidity flows; Hyperpycnal; Flood.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00001/11219/7652.pdf
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Delimitacao do pantanal brasileiro e suas sub-regioes. Repositório Alice
SILVA, J. dos S.V. da; ABDON, M. de M..
Objetiva-se delimitar e quantificar a planicie do Pantanal no Brasil, na escala de 1:250.000, sua sub-regioes e a participacao estadual e municipal nessa regiao. Os criterios adotados na delimitacao foram aspectos relacionados a inundacao, relevo, solo e vegetacao. Os materiais utilizados foram os estudos anteriores relacionados a delimitacao fisiografica do Pantanal, Sistema Global de Posicionamento (GPS), mapas municipais estatisticos, cartas topograficas e imagens coloridas do satelite Landsat 5 TM, ambos na escala de 1:250.000, apoiados em trabalhos de campo. A extracao das informacoes foi feita a partir de metodos de interpretacao visual das imagens. Os criterios adotados mostraram-se consistentes na delimitacao, e a inundacao e o relevo foram os de...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Sensoriamento remoto; Fisiografia; Inundacao; Remote sensing; Physiography; Flood.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/handle/doc/88543
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Effects of different water regimes on the anatomical characteristics of roots of grasses promising for revegetation of areas surrounding hydroelectric reservoir Ciência e Agrotecnologia
Silva,Silvana da; Castro,Evaristo Mauro de; Soares,Ângela Maria.
The objective of this study was to evaluate the effect of different water regimes on some aspects of root anatomy of three grasses: Echinochloa pyramidalis (canarana), Setaria anceps (setária) and Paspalum paniculatum (paspalo). The plants were cultivated in a greenhouse and submitted to three water regimes: daily watering; suspension of watering and suspension of watering followed by submersion of the root system. Segments of the middle part of the roots were taken and submitted to classical techniques in botany for slide making and tissue analysis. Anatomical differences were observed among the three grasses submitted to water regimes regarding the number of cell layers in the external cortex and thickening of lignin and suberin. The submerged roots of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Revegetation; Grasses; Water deficit; Echinochloa pyramidalis; Setaria anceps; Paspalum paniculatum; Flood; Aerenchyma; Anatomical characteristics; Roots.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542003000200020
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Impacts of the 2010 Droughts and Floods on Community Welfare in Rural Thailand: Differential Effects of Village Educational Attainment Ecology and Society
Climatic events can have disastrous consequences on rural livelihoods, which rely mainly on agriculture and natural resources. The way households and communities respond to climatic shocks depends on their available resources. We formulated that education is a human capital asset that can increase coping abilities in difficult times because education improves access to both social and economic resources. Based on the Thai government surveys of the living conditions and life quality of 68,343 rural villages for the years 2009 and 2011, we investigated the impacts of floods and droughts in 2010 on community welfare, i.e., consumption and income in 2011 at the village level. Using difference-in-difference methods, we analyzed how differential demographic...
Tipo: Peer-Reviewed Reports Palavras-chave: Consumption and income smoothing; Drought; Economic vulnerability; Education; Flood; Thailand; Welfare.
Ano: 2013
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Influence of flood areas on the number of diazotrophic bacteria from pasture grasses. Repositório Alice
BRASIL, M. da S.; SOUZA, M. S. T. de; OLIVEIRA, I. B. de.; DANIEL, O.; SANTOS, S. A.; MARQUES, M. R.; SILVA, W. M. da..
Floodplain areas are driven by flood pulse and with consequence, flood gradient are formed, such as, lakes, wetlands and dry areas. And this gradient is one of the most important forcing functions for animal and plant ecology that areas. The aim of this study is testing the hypothesis of the flood gradient in the bacteria diazotrophic association with grasses in their roots and shoots. The study was realized in the Pantanal of the Mato Grosso do Sul, in two periods, rainy (March, 2009) and dry (August, 2010) and the samples of grasses were made in different flood gradients areas: in dry, in seasonally flood and in permanent flooded. The number of bacteria in the roots and stems were counted using the most probable number method using the semi-solid media...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Floodplain; Inundacao; Graminea; Grasses; Flood.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1057971
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Innovations in Insuring the Poor AgEcon
Innovations in Insuring the Poor: Overview, by Ruth Vargas Hilland Maximo Torero; Risk, Poverty, and Insurance, by Stefan Dercon; Microinsurance for Health and Agricultural Risks, by Richard Leftley; Sustainability and Scalability of Index-Based Insurance for Agriculture and Rural Livelihoods, by Ulrich Hess and Peter Hazell; Intelligent Design of Index Insurance for Smallholder Farmers and Pastoralists, by Michael R. Carter; Experience with Weather Index-based Insurance in India and Malawi, by Xavier Gine; Providing Weather Index and Indemnity Insurance in Ethiopia, by Eyob Meherette; Index-based Livestock Insurance in Mongolia, by Oliver Mahul, Nathan Belete, and Andrew Goodland; Health Insurance for the Rural Poor: Evidence from Cambodia, by David I....
Tipo: Working or Discussion Paper Palavras-chave: Poverty; Health risks; Welfare; Income growth; Poor households; Agricultural risks; Financial instruments; Social protection policies; Drought; Flood; Food Security and Poverty.
Ano: 2009 URL: http://purl.umn.edu/59689
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Integrating local knowledge and science: economic consequences of driftwood harvest in a changing climate Ecology and Society
Jones, Chas E; International Arctic Research Center, University of Alaska Fairbanks; chas@chasjones.com; Kielland, Knut; Institute of Arctic Biology, University of Alaska Fairbanks; kkielland@alaska.edu; Hinzman, Larry D; International Arctic Research Center, University of Alaska Fairbanks; ldhinzman@alaska.edu; Schneider, William S; Oral History Department, University of Alaska Fairbanks; wsschneider@alaska.edu.
The integration of local knowledge and science represents an opportunity to enhance the understanding of interrelations among climate, hydrology, and socioeconomic systems while providing mutual benefits to scientists and rural communities. Insight from rural Alaskans helped to identify a social-ecological threshold used to model potential driftwood harvest from the Yukon River. Information from residents of Tanana, Alaska, was combined with scientific data to model driftwood harvest rates. Modeling results estimated that between 1980 and 2010, hydrologic factors alone were responsible for a 29% decrease in the annual wood harvest, which approximately balanced a 23% reduction in wood demand because of a decline in number of households. The...
Tipo: Peer-Reviewed Reports Palavras-chave: Biomass; Climate; Driftwood; Economics; Flood; Hydrology; Large woody debris; Local knowledge; Participatory research; Social-ecological model; Threshold.
Ano: 2015
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Modelación hidrológica y análisis de factibilidad técnica y económica del proyecto de temporal tecnificado de ampliación del Bajo Papaloapan-Tesechoacán, estado de Veracruz. Colegio de Postgraduados
Rodríguez Rodríguez, Jesús.
Se realizó la modelación hidrológica y el análisis de factibilidad técnica y económica del proyecto de ampliación de la superficie del Distrito de Temporal Tecnificado 003 Tesechoacán, cuenca del río Papaloapan, que presenta problemas con inundaciones. A partir de la información de los estudios básicos, se realizó una simulación hidrológica usando el software MIKE, del Instituto Hidráulico Danés, para identificar las áreas de afectación. La modelación realizada permitió precisar las superficies inundadas las cuales, al estar georreferenciadas, permitieron el análisis de diferentes estrategias de control de inundaciones. Considerando un periodo de retorno de 25 años, el área inundable simulada bajo las condiciones actuales resultó de 51,175.59 ha. Se...
Palavras-chave: Distrito de temporal tecnificado; Simulación hidrológica; Inundaciones; Drenes; Technified rainfed agriculture district; Hydrological simulation; Flood; Drains; Maestría; Hidrociencias.
Ano: 2010 URL: http://hdl.handle.net/10521/176
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Mudanças no regime hidrológico da bacia hidrográfica do Rio Taquari-Pantanal. Infoteca-e
GALDINO, S.; PADOVANI, C. R.; SORIANO, B. M. A.; VIEIRA, L. M..
A inundação de 11.000 km2 no Pantanal, iniciada na década de 70, vem causando prejuízos à pecuária bovina e alterações na flora nativa. Esta inundação atribuída ao assoreamento do rio Taquari pode também estar associada a mudança no regime hidrológico, passando de um período seco para um período de chuvas e cheias maiores. As cheias maiores podem estar relacionadas ao aumento do desmatamento na bacia do alto Taquari (BAT). Foram analisadas vazões no rio Taquari, contribuições do nível do rio Paraguai e da precipitação na inundação. Também foi avaliado efeito da expansão da agropecuária na BAT sobre o aumento da vazão do rio Taquari, em Coxim. Contatou-se mudança significativa no regime hidrológico da planície do baixo curso do Taquari. A partir de 1973-74...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Regime hidrológico; Mudança; Cheia; Hidrologia; Bacia do Rio Taquari; Pantanal; Hydrologic regime; Change; Flood; Hydrology; Watershed; Taquari river basin.
Ano: 2002 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/810744
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Multiscale spatio-temporal variability of sedimentary deposits in the Var turbidite system (North-Western Mediterranean Sea) ArchiMer
Mas, Virginie; Mulder, T.; Dennielou, Bernard; Schmidt, S.; Khripounoff, Alexis; Savoye, Bruno.
The Var turbidite system is a small sandy system located in the Ligurian Basin (Mediterranean Sea). It is active during present sea-level highstand and shows four types of sediment transfer processes: (1) low-density turbidity surges generated by small-scale failures (2) low-magnitude, high-frequency (yearly) hyperpycnal turbid plumes, (3) high-magnitude, less-frequent, hyperpycnal currents and (4) high-magnitude flows generated by large slope failures. These processes have different imprints on the morphology of the system. Inversely, the topography plays a role on the behaviour of these flows. The depositional and erosional architecture of the system has been investigated in detail on the basis of SAR imagery and a set of cores using an interface corer...
Tipo: Text Palavras-chave: Var; France; Gravity processes; Mediterranean; Turbidity current; Hyperpycnal; Flood.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00013/12458/11862.pdf
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O clima no Pantanal Mato-Grossense. Infoteca-e
CADAVID GARCIA, E. A..
O Pantanal Mato-grossense e uma planície de 139.111 km2, com altitude de 80 a 150 m e declividade de 2,5 a 5,0 cm.km-1 no sentido Norte-Sul. O clima da região e o resultado da localização geográfica tropical, do relevo e de esporádicas massas de ar frio do Sul do Pais. O regime pluviométrico e de verão e apresenta algumas variações quanto a intensidade e distribuição no ano, estimando-se, para o norte (Cáceres, MT), concentração de 82,4% nos meses de outubro a marco, com valores médios da chuva de 1.262 +_ 200 mm. Na parte intermediaria do Pantanal (Corumbá, MS), observa-se concentração menor (77,3% na Fazenda Nhumirim), com altura pluvial media de 1.022 +_ 113 mm. O "período de recorrência" das pluviométricas também apresenta variações entre sub-regiões....
Tipo: Circular Técnica (INFOTECA-E) Palavras-chave: Climatologia agricola; Pantanal; Mato Grosso do Sul; Clima; Chuva; Temperatura; Enchente; Periodo de retorno; Climate; Rainfall; Temperature; Flood; Cycles.
Ano: 1984 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/787712
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Practices and Lessons Learned in Coping with Climatic Hazards at the River-Basin Scale: Floods and Droughts Ecology and Society
Krysanova, Valentina; Potsdam Institute for Climate Impact Research; krysanova@pik-potsdam.de; Buiteveld, Hendrik; Center for Water Management; h.buiteveld@riza.rws.minvenw.nl; Haase, Dagmar; UFZ - Helmholtz Centre for Environmental Research; dagmar.haase@ufz.de; Hattermann, Fred F; Potsdam Institute for Climate Impact Research; hattermann@pik-potsdam.de; van Niekerk, Kate; Institute of Natural Resources; VanNiekerk@ukzn.ac.za; Roest, Koen; Alterra - Wageningen University and Research Centre; Koen.Roest@wur.nl.
Climatic hazards such as floods and droughts have always been a primary matter of concern for human populations. Severe floods damage settlements, transport networks, and arable land. Although devastating droughts are harmful primarily for agriculture and terrestrial ecosystems, they can also lead to local water supply shortages. Despite significant achievements in science and technology and success stories in environmental management in the 20th century, people still continue to suffer the consequences of climate hazards worldwide. This paper provides an overview of existing practices for coping with floods and droughts, compares strategies in different river basins, and outlines the areas that need improvement. First, the existing protection measures and...
Tipo: Peer-Reviewed Reports Palavras-chave: Amudarya; Climate change; Climatic hazards; Coping strategy; Drought; Elbe; Flood; Guadiana; Nile; Orange; Rhine; Tisza; Water resources management.
Ano: 2008
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The mighty Susquehanna-extreme floods in Eastern North America during the past two millennia ArchiMer
Toomey, Michael; Cantwell, Meagan; Colman, Steven; Cronin, Thomas; Donnelly, Jeffrey; Giosan, Liviu; Heil, Clifford; Korty, Robert; Marot, Marci; Willard, Debra.
The hazards posed by infrequent major floods to communities along the Susquehanna River and the ecological health of Chesapeake Bay remain largely unconstrained due to the short length of streamgage records. Here we develop a history of high‐flow events on the Susquehanna River during the late Holocene from flood deposits contained in MD99‐2209, a sediment core recovered in 26 m of water from Chesapeake Bay near Annapolis, Maryland, USA. We identify coarse‐grained deposits left by Hurricane Agnes (1972) and the Great Flood of 1936, as well as during three intervals that predate instrumental flood records (~1800‐1500, 1300‐1100 and 400‐0 CE). Comparison to sedimentary proxy data (pollen and ostracode Mg/Ca ratios) from the same core site indicate that...
Tipo: Text Palavras-chave: Hurricane; Flood; Holocene; East coast; River; Chesapeake.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00483/59447/62291.pdf
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Understanding stakeholder preferences for flood adaptation alternatives with natural capital implications Ecology and Society
Loos, Jonathon R; Center for the Environment, Plymouth State University; jonathon.loos@gmail.com; Rogers, Shannon H; Center for the Environment, Plymouth State University; shrogers@plymouth.edu.
Inland flood risks are defined by a range of environmental and social factors, including land use and floodplain management. Shifting patterns of storm intensity and precipitation, attributed to climate change, are exacerbating flood risk in regions across North America. Strategies for adapting to growing flood risks and climate change must account for a community’s specific vulnerabilities, and its local economic, environmental, and social conditions. Through a stakeholder-engaged methodology, we designed an interactive decision exercise to enable stakeholders to evaluate alternatives for addressing specific community flood vulnerabilities. We used a multicriteria framework to understand what drives stakeholder preferences for flood mitigation...
Tipo: Peer-Reviewed Insight Palavras-chave: Ecosystem-based adaptation; Flood; Hazard planning; Multicriteria decision making; Stakeholder values; Utility theory.
Ano: 2016
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