|
|
|
| Registros recuperados: 192 | |
|
| |
|
| |
|
| |
|
|
| OLIVEIRA JUNIOR, R. C. de. |
| A grande utilização das terras da parte leste do Estado do Pará com projetos agropecuários e extrações madeireiras, que de múltiplas formas modificam ou alteram a camada superficial dos solos deixando-os mais vulneráveis a ação da erosão hídrica causada pela chuva, planejou-se este estudo que visa determinar a erosividade das chuvas nessa região do Estado, como um primeiro passo para um programa de conservação. Para isto, coletou-se os dados pluviográficos existentes em sete municípios dos mais utilizados nesses projetos, a saber: Belém, Bragança, Cametá, Tucuruí, Marabá, Paragominas e Conceição do Araguaia. Usou-se a metodologia de Wischmeier e Smith modificada por Cabeda, para a determinação do índice nos locais acima referidos. Os resultados deste... |
| Tipo: Teses |
Palavras-chave: Índice de erosividade; Pará; Brasil; Erosion; Chuva; Deterioração do Solo; Erosão; Amazonia; Water erosion. |
| Ano: 1988 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/402455 |
| |
|
|
| MacGillivray, C.M.I.; Donovan, S.K.. |
| This research introduces a Geographical Information Systems (GIS) model that predicts the location and relative susceptibility of humid subtropical hillslopes to sheetwash erosion. The extent of the erosion was based on the conservation potential of the existing vegetation cover. This is an original deductive and deterministic model (Potential Erosion Detection, PED) incorporating regionally applicable physical and land use factors thought to be influential. These were climate (agroclimatic zones), topography (aspect and slope angle), soil (texture, drainage, depth, aggregation), vegetation cover and land use (tillage activity). The study looked at surface erosion as a perceived problem in a post-colonial economy. The processes, cause and effect of... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Jamaica; Buff Bay; Geographical Information Systems; IDRISI; Geomorphology; Soil; Erosion; 38.42. |
| Ano: 2007 |
URL: http://www.repository.naturalis.nl/record/217419 |
| |
|
| |
|
| |
|
| |
|
|
| Brandão, Roberto; Batista, Getulio; Catelani, Celso. |
| A crescente atividade do setor florestal voltado à produção de papel e celulose no vale do Paraíba no Estado de São Paulo tem despertado indagações sobre os potenciais impactos que essa atividade pode causar ao meio ambiente. Dentre outros pontos a serem avaliados, as estradas rurais que dão acesso aos maciços florestais de eucalipto têm ligação direta com a qualidade dos recursos hídricos existentes nas bacias onde são implantados os talhões de eucalipto, principalmente no que se refere à erosão e ao transporte de material erodido para os cursos d’água. Nesse contexto, o presente trabalho teve como objetivo analisar as condições das estradas utilizadas nos plantios de eucalipto nos municípios de Cunha e Guaratinguetá, SP. Para isso foram analisados os... |
| Tipo: Article |
Palavras-chave: Erosão; Erosion; Estradas florestais; Eucaliptus. |
| Ano: 2006 |
URL: http://hdl.handle.net/2315/47 |
| |
|
| |
|
| |
|
| |
|
|
| Blaise, Emmanuel; Suanez, Serge; Stephan, Pierre; Fichaut, Bernard; David, Laurence; Cuq, Veronique; Autret, Ronan; Houron, Julien; Rouan, Mathias; Floc'H, France; Ardhuin, Fabrice; Cancouet, Romain; Davidson, Robert; Costa, Stephane; Delacourt, Christophe. |
| Between December 2013 and March 2014, a cluster of about 12 storm events hit the coast of Brittany with an exceptional frequency. It was in February that these storm events were the most frequent and particularly virulent. The significant wave heights measured off Finistere reached respectively 12.3 m and 12.4 m during Petra and Ulla storms on February 5 and 14. However, analysis of hydrodynamic conditions shows that only three episodes promoted extreme morphogenetic conditions because they were combined with high spring tide level. The first one occurred on January 1 to 4, it was followed by events from February 1 to 3, and March 2-3. During these three extreme events observed tide levels were above highest astronomical tide level (HAT). Maximum surge... |
| Tipo: Text |
Palavras-chave: Tempête; Érosion; Trait de côte; Marée de vive-eau; Bretagne; Surcote; Storm; High spring tide; Surge; Erosion; Shoreline; Brittany. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00310/42171/43029.pdf |
| |
|
| |
|
| |
|
|
| Molina-M., A.; Molina-M., C.; Giraldo-O., L.; Barrera-O., R.. |
| The geologic (stratigraphic) and morphodynamic characteristics throughout 76 km of the coastal profile of the Colombian Caribbean, including those between Barranquilla (Bocas de Ceniza) and the spit of Galerazamba are described. The sections of the coast that have been affected by erosive events and those with sedimentary accretion are described. Some of them are associated to both natural and anthropic phenomena. Geologically, the coastal edge is defined by sedimentary rocks, weakly consolidated sediments and inconsolidated sediments, that include ages from the upper Paleocene to the Recent. From the point of view of the evaluation of the coast in terms of stability and instability, the high coasts are classified as: Critic zones (Punta Sabanilla,... |
| Tipo: Journal Contribution |
Palavras-chave: Stratigraphy; Coastal zone; Erosion; Sedimentation; Stratigraphy; Erosion; Sedimentation; Http://aims.fao.org/aos/agrovoc/c_7440; Http://aims.fao.org/aos/agrovoc/c_2651; Http://aims.fao.org/aos/agrovoc/c_6926. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/3433 |
| |
|
|
| Toma,Maíra Akemi; Owens,Phillip Ray; Silva,Carlos Alberto; Silva,Sérgio Henrique Godinho; Silva,Elen Alvarenga; Curi,Nilton. |
| In soil surveys, it is usual to find profiles with an uncommon disposition of horizons. Dark horizons in depth might be either the consequence of erosion and redeposition of soil materials from upslope or an indication of the podzolization process, which forms a spodic horizon. Few laboratory analyses are known to characterize dark subsurface horizons which could allow for the differentiation of spodic from buried A horizons. Some researchers propose C-humic and C-fulvic acid fraction ratios and forms of carbon to analyze characteristics of these horizons. Therefore, this research aimed to characterize dark subsurface horizons found in soils under a Eucalyptus minimum tillage system in the state of Rio Grande do Sul, Brazil, and to relate soil organic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Humic substances; Organic matter; Erosion; Podzolization; Redeposition. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000400334 |
| |
|
|
| King, B.A.; Bjorneberg, D.L.. |
| A 4-wheeled commercial irrigation boom was modified for use in investigating center pivot design and management effects on infiltration, runoff and erosion of specific soil types. The center pivot simulator used a hydraulic winch attached to the front of a tractor for mobilization and controlled travel speed. A 3 inch diameter 300 ft drag hose is used to supply water to the center pivot simulator. The center pivot simulator was used to conduct two studies to investigate infiltration, runoff and erosion differences of common commercially available center pivot sprinkler types on a Portneuf silt loam soil. Sprinklers used in the first study were: 1) Nelson R3000 with brown plate, 2) Nelson R3000 with red plate, 3) Nelson S3000 with purple plate, and... |
| Tipo: Conference or Workshop Item |
Palavras-chave: Erosion; Infiltration; Center pivot; Erosion; Mass Import - autoclassified (may be erroneous). |
| Ano: 2007 |
URL: http://eprints.nwisrl.ars.usda.gov/965/1/1236.pdf |
| |
|
|
| Wilson, Amanda. |
| North Shore City’s coastline has been subject to intensive development pressure over the last 15 years. In this time, new developments have established along previously undeveloped areas of coastline and existing sites have redeveloped with much larger houses. This paper provides a description of the planning controls that currently affect coastal development and an assessment of the effectiveness of these controls. This is followed by an analysis of the role of local government in controlling future development. Contention arises when attempts are made to control the property rights of landowners to protect their properties from coastal erosion. The impacts of private coastal protection works on the coastline have wider impacts than their immediate... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Coast; Erosion; Planning; Cost; Benefit; Development; Protection; Structures.; Environmental Economics and Policy. |
| Ano: 2010 |
URL: http://purl.umn.edu/59260 |
| |
|
| |
| Registros recuperados: 192 | |
|
|
|
