999 resultados para Estuário. Vulnerabilidade Ambiental. Impacto Ambiental. Solo


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The State of Paraba is one of the most dynamic states of Brazil, strategically located in the northeast, is notable for the excellent potential for integration of different transportation modes forming the states of Rio Grande do Norte, Pernambuco and Alagoas. The dynamic that occurs with port activity causes changes in the space where it is installed. And the elements of this space are always more than suffering direct or indirect influences as the flow in the port is expanded. Therefore, this region became subject to the accidental spillage of oil, because it presents a heavy traffic of ships of various sizes that can run aground or collide with oil causing accidental events. The study of geomorphological and sedimentological compositions of seafloor becomes important as more is known about the relationships between these parameters and associated fauna, and can identify their preferred habitats. The database background, acoustically collected along the proposed study area, is a wealth of information, which were duly examined, cataloged and made available. Such information can serve as an important tool, providing a geomorphological survey of the sedimentary area studied, and come to subsidize, in a flexible, future decision making. With the study area Port of Cabedelo, Paraba - Brazil, this research aimed to evaluate the influence of the tidal surface and background in modeling the seabed, including the acquisition of information about the location of submerged rocky bodies and the depth of these bodies may turn out to be natural traps for the trapping of oil in case of leaks, and obtain the relationship between types of bed and the hydrodynamic conditions present in the region. In this context, for this study were collected bathymetric data (depth) and physical oceanographic (height of water column, water temperature, intensity and direction of currents, waves and turbidity), meteorological (rainfall, air temperature, humidity, winds and barometric pressure) of the access channel to the Port of Cabedelo / PB and its basin evolution (where the cruise ships dock), and includes tools of remote sensing (Landsat 7 ETM +, 2001), so that images and the results are integrated into Geographic Information Systems and used in the elaboration of measures aimed at environmental protection areas under the influence of this scale facilities, serving as a grant to prepare a contingency plan in case of oil spills in the region. The main findings highlight the techniques of using hydroacoustic data acquisition together bathymetric surveys of high and low frequency. From there, five were prepared in bathymetric pattern of Directorate of Hydrography and Navigation - DHN, with the depth in meters, on a scale of 1:2500 (Channel and Basin Evolution of Access to Port of Cabedelo), where there is a large extent possible beachrocks that hinder the movement of vessels in the port area, which can cause collisions, running aground and leaking oil. From the scatter diagram of the vectors of currents, it can be seen as the tidal stream and undergoes a channeling effect caused by the bidirectional effect of the tide (ebb and flood) in the basin of the Port of Cabedelo evolution in NW-direction SE and the highest speed of the currents occurs at low tide. The characterization weather for the period from 28/02 to 04/07/2010 values was within the expected average for the region of study. The multidisciplinary integration of products (digital maps and remote sensing images), proved to be efficient for the characterization of underwater geomorphological study area, reaching the aim to discriminate and enhance submerged structures, previously not visible in the images

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Among the potentially polluting economic activities that compromise the quality of groundwater are the gas stations. The city of Natal has about 120 gas stations, of which only has an environmental license for operation. Discontinuities in the offices were notified by the Public Ministry of Rio Grande do Norte to carry out the environmental adaptations, among which is the investigation of environmental liabilities. The preliminary and confirmatory stages of this investigation consisted in the evaluation of soil gas surveys with two confirmatory chemical analysis of BTEX, PAH and TPH. To get a good evaluation and interpretation of results obtained in the field, it became necessary three-dimensional representation of them. We used a CAD software to graph the equipment installed in a retail service station fuel in Natal, as well as the plumes of contamination by volatile organic compounds. The tool was concluded that contamination is not located in the current system of underground storage of fuel development, but reflects the historical past in which tanks were removed not tight gasoline and diesel

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Para uma adequada gesto ambiental, necessria uma criteriosa avaliao do desempenho ambiental da propriedade agrcola, o que pode ser feito com a aplicao de procedimentos de Avaliao de Impacto Ambiental (AIA), integrando-se as dimenses sociais, econmicas e ecolgicas da sustentabilidade. A Embrapa tem dedicado importante esforo para o desenvolvimento, a validao e a utilizao de sistemas de Avaliao de Impactos Ambientais (AIA), desde a escala de estabelecimentos rurais at a escala institucional.

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Despite the importance of coral reefs to humanity, these environments have been threatened throughout the world. Several factors contribute to the degradation of these ecosystems. The Maracaja Reef Complex, in Rio Grande do Norte state is part of the Coral Reefs Environment Preservation Area in northeastern Brazil. This area has been receiving an increasing influx of tourism and the integrity of the local reefs is a matter of concern. In this study, the reef macroalgae communities were studied and compared within two areas distinguished by the presence or absence of tourism activities. Two sample sites were chosen: the first one, where diving activities are intense; and the other, where these practices do not occur. Samples were collected at both sites within a quadrate of 625 cm2 of area randomly thrown 5 times along a 10 meters transect line. Richness, Shannon-Hill diversity and Simpson dominance indices were determined based on biomass data. Similarity between sites was analyzed with Bray-Curtis similarity and distance index. Fifty-eight macroalgae species were observed, including 7 Chlorophyta, 13 Phaeophyta and 38 Rhodophyta. In the non-disturbed site, 49 species were found, while at the disturbed site, there were 42 species. Dictyotaceae and Corallinaceae were the most representative families at the non-disturbed site, and Rhodomelaceae and Dictyotaceae at the disturbed site. The non-disturbed site presented a higher biomass and the greatest richness and diversity indices. In the disturbed site the dominance index was greater and Caulerpa racemosa was the dominant species. The dendogram based on similarity index showed two major clusters, and an isolated element at the center that corresponds to a sample from the disturbed site. In the first cluster, samples from the non-impacted site were predominant and fleshy brown algae were more conspicuous. The second cluster was composed primarily of samples from the impacted site, where C. racemosa and red filamentous and erect calcareous algae associations (turf forming) were observed covering large extensions. These associations are represented by groups of algae adapted to environments where disturbances are frequent. They can grow rapidly on substrate where benthic community was removed and do not allow the establishment of other species. The results of the present study show that tourism activity is an impacting factor that has been causing shifts in macroalgae communities in the Maracaja Reef Complex

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Tese (doutorado)Universidade de Braslia, Instituto de Geocincias, Ps-Graduao em Geocincias Aplicadas, 2016.

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La crisis ambiental que atravesamos actualmente es consecuencia del avance vertiginoso de las diferentes actividades humanas, lo cual se constituye en una amenaza constante a la biodiversidad. Los problemas ambientales afectan a la totalidad de los elementos de la naturaleza, es decir: el aire, el agua, el suelo, los bosques y la cobertura vegetal en general, los animales, la energa, el clima y las personas; y ello est amenazando a la vida de las presentes y futuras generaciones. Ecuador, a pesar de su riqueza ecolgica y cultural, durante las ltimas dcadas ha ejercido cada vez mayor presin sobre el ambiente a raz de: el incremento acelerado de la poblacin, la migracin del campo a la ciudad, los modelos de consumo insostenibles, la explotacin del llamado oro negro o petrleo, la degradacin y prdida directa de bosques, humedales y otros ecosistemas. Aspectos que constituyen un riesgo, no solo para el ambiente, sino tambin para la sociedad y el bienestar humano, pues la biodiversidad representa la base para la vida en nuestro planeta y es uno de los pilares fundamentales del desarrollo sostenible. An cuando los grandes problemas ambientales que estamos atravesando son comunes a los del resto del mundo, en Ecuador encontramos cuatro grandes problemas o macroproblemas ambientales: la destruccin y fragmentacin de los hbitats, la introduccin de especies exticas, la sobreexplotacin de recursos naturales y la contaminacin. A stos podramos sumar uno ms: el cambio climtico global, cuyos efectos a mediano y largo plazo ponen en riesgo la biodiversidad y la calidad de vida de toda la humanidad. Ante la magnitud de los problemas ambientales que nos afectan, el universo tiene los ojos puestos en la bsqueda de alternativas a los mismos. Por esta razn, se vienen desarrollando una serie de eventos, reuniones, conferencias a nivel nacional e internacional, con el propsito de aunar esfuerzos en el diseo de polticas y estrategias generales y particulares, que permitan aproximarse al equilibrio en las relaciones del ser humano con la naturaleza...

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Investigacin que identifica la contaminacin ambiental que han experimentado las comunidades de Mochuelo Alto y Mochuelo Bajo a raz de su convivencia con el basurero de Doa Juana (ubicado en la ciudad de Bogot). Proyecto con enfoque cualitativo desarrollado a partir de una metodologa de relatos de vida y perspectiva biogrfica que describe la forma como las comunidades han hecho frente al sufrimiento ambiental y algunas de las implicaciones que conlleva la contaminacin en sus relaciones sociales.

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Um empreendimento de escala grandiosa como o que foi levado a cabo em So Domingos, entre meados do sculo XIX e meados do sculo XX, para a explorao das pirites, tinha de ter impacto no ambiente. Nesta histria da explorao moderna de um recurso geolgico descrevemos o caso concreto da mina desta pequena localidade do territrio de Mrtola, destacando os problemas de natureza ambiental identificados. O empreendimento que motiva este estudo teve igualmente reflexo na imprensa regional e nacional, as fontes que privilegimos como reflexo de um hipottico debate no espao pblico, juntamente com documentos dos servios oficiais que regularam a atividade da empresa exploradora, a nvel econmico mas tambm ambiental. ocupao de um territrio praticamente deserto, no interior alentejano, onde o capital ingls fez surgir uma povoao prspera, seguiu-se a degradao ambiental, evidenciada pelo impacto na paisagem, pela poluio do ar e pela poluio da gua, sem esquecer a desertificao humana associada ao encerramento da mina, apesar dos esforos para a reconverso econmica da regio por parte das entidades envolvidas.

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O Stio de Importncia Comunitria da Costa Sudoeste de Portugal alberga 49 habitats naturais e seminaturais, 25% considerados prioritrios. A ocupao e uso do solo esto a ameaar valores paisagsticos e ecolgicos nesta rea protegida. As principais causas de degradao ambiental so a intensificao agrcola e o crescimento turstico. Os Charcos Temporrios Mediterrnicos esto legalmente protegidos, mas cerca de 50% desapareceram em 18 anos. Apesar de haver bons estudos sobre as ameaas e os impactos na biodiversidade associada aos charcos temporrios, nenhum ilustra a perceo ambiental da populao. Foram realizados questionrios e entrevistas a quatro pblicos-alvo (populao local, turistas, agricultores e administradores) nos concelhos de Odemira e Vila do Bispo. Existem diferenas na perceo destes pblicos no que respeita a valorao do habitat como recurso natural. No concelho de Odemira valora-se os charcos temporrios pela utilidade que podem ter nas atividades agrcolas tradicionais. Em Vila do Bispo, valora-se mais o uso turstico. Turistas estrangeiros do mais valor conservao do que turistas nacionais. Os agricultores valoram os charcos temporrios consoante a localizao destes no terreno. Se a sua presena no interferir com a produo, so considerados mais-valias, mas se reduzirem a rentabilidade da explorao, sero pontos de conflito com a gesto da rea protegida. Os administradores valoram o habitat por ser um elemento diferenciador do territrio e reconhecem a sua potencialidade para o turismo de natureza. So propostas aes de sensibilizao para a conservao dos charcos temporrios e minimizao dos conflitos existentes entre desenvolvimento local, gesto e conservao deste habitat.

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La crisis de gobcrnabilidad de los recursos hdricos es clara y evidente en Costa Rica. Estos recursos estn en proceso de deterioro y peligrosamente amenazados. En tan solo cinco dcadas se pas de la riqueza y abundancia de agua, a la vulnerabilidad y escasez de sta. Un conjunto de realidades ha originado la mencionada crisis: la ausencia de polticas hdricas integrales, claras y estables, un marco legal desactualizado. esttico y de mnimo cumplimiento, que ha permitido el uso ineficiente y la contaminacin de los cuerpos de agua y desde luego la cultura dominante de poca o ninguna valoracin del agua como recurso vital para el desarrollo presente y futuro de todas las especies que poblamos el pas.La Agenda Ambiental del Agua en Costa Rica ha sido elaborada mediante un proceso parlicipativo. donde diversos actores sociales en diferentes regiones Limn, Liberia y la Gran Area Metropolitana (GAM) priorizaron los 10 principales problemas y sus potenciales soluciones:1) La educacin formal e informal es muy dbil respecto a como alcanzar el uso eficiente e inteligente de los recursos hrdricos. Igualmente, es dbil para revertir el patrn de manejo de vertidos sin responsabilidad social.2) La excesiva centralizacin de las decisiones. Muy poca participacin ciudadana tanto en la estructura organizativa como en la toma de decisiones.3) La inoperancia del marco institucional y legal desconocimiento por parte de la sociedad civil de los procesos de denuncia y otros; la tramitologa de denuncia es demasiado lenta e ineficiente, razn por la cual los denunciantes se cansan y desaniman.4) La deficiente y casi nula valoracin econmica del agua, que tome en cuenta el manejo integral de las cuencas y la bsqueda de la permanencia del recurso en el futuro.5) La ausencia de planes hdricos de cuencas donde el plan regulador sea un componente bsico.6) La desigual calidad del agua para los costarricenses segn operador del servicio y regin geogrfica.7) La contaminacin de aguas superficiales y subterrneas.8) La ausencia de conocimiento, socializacin, sistematizacin y movilizacin en relacin con el manejo del agua. Es necesario el aumento de las capacidades tanto tcnicas y cientficas como de cambio de cultura y conocimiento popular.9) Falta de informacin bsica y mecanismos claros para poder utilizarla.10) La informacin existente en la actualidad se encuentra dispersa en diferentes orgarnza ciones y en algunos investigadores, lo que impide su uso efectivo.La Agenda Ambiental del Agua en Costa Rica aproxima los costos para la solucin de los problemas apuntados anteriormente. Se necesita invertir alrededor de US$J .500 millones para abordar la gestin integrada de los recursos hdricos en el pas.Abstract: The crisis of governance of thc watcr resources is clear and evideni in Costa Rica. These resources are in proccss odeterioration anddangerously threatened. In only five decades it passed of che wealth and water abundance, to che vulnerability and shortagc of thc same one. A set of realities has originated dic mentioned crisis; dic abscncc of an integral, clear and siable water policy, a legal framework out of date. static one and of minimal fulfillmeni. which has allowed che inefficicrn use and ihe pollution ofihe water bodies. And certainly. hc dominecring culture of small ci no valuation to the water as vital resource for thc prcscnt and future dcvclopment of alI dic species. thai we populate che country.The Environmental Agenda of the Water in Costa Rica has bccn claborated by means of a participatory proccss. which includes several social actors in diverse regions Limon. Liberia and Great Metropolitan Area (GAM) These actors prioritized lO principal problems related to water resources and thcir potential solutions:1) The formal and informal education is very weak with regard to since as reaches the efficient and intelligeni use of thc water resources. Equally. dic boss of managing is weak for revert of spilt without social responsibilicy.2) The excessive centralization of che decisions with very little civil parlicipation. both in the organizational siructure and in the decision making process.3) The un.workability of ihe institutional and legal framewoik ignorance cii che pan of civil society of che proces.ses of denunciation and others the denunciation niechanism is ioo slow and inefticieni, a reason for which dic cbtmants get tired and discouragc.4) Thedeficientone and almosi voideconomic valuationofthe waier. which bears in mmd the integral managing of the basin and dic scarc h of dic permancncy of dic resource to future.5) Thc absence of water plans of basin where dic regulatory plan is a basic component.6) The unequal quality of the water for dic Costa Ricans according tooperacor of dic service and geographica] region.7) The pollution of superficial and underground waters.8) The absence of knowledgc. socializ.arion, systematizing and mobilization in relation co the waier managing. Thc increase of dic capacities is necessary so much tcchnical and scicntific like of change of culture and popular knowledge.9) Lack of basic information and clear mechanisms to be able to use it.10) Thc cxisting information aL preseni is dispersed in different organizations and in sorne investigators, which prevents ihe effective use of the same one.The Environmental Agenda of the Water in Costa Rica brings the costs near for the solution of the pointed problems previously. Costa Rica needs to invest about US$1.500 million Lo approach ihe integrated managcment of the water resources in the country.