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| Registros recuperados: 343 | |
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| Lima, Maria Lucilene Alves de. |
| The use of geoprocessing has become a more important tool to map areas with substance concentrations above the patterns that may affect the quality of the water. The objective of such study was to evaluate the quality of the superficial waters of the rivers in Rondônia used for to the supplying. Through the espace measurement of the color and turbidity isoconcentration it was inferred that the quality of the waters are in agreement with the maximum limits allowed by the resolution of CONAMA n. 357/05. |
| Tipo: Article |
Palavras-chave: Geoprocessing; Rondônia; Water quality. |
| Ano: 2007 |
URL: http://hdl.handle.net/2315/100 |
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| Córdova Avalos, Antonio. |
| Se evaluó la salud de los Pantanos de Centla, Tabasco, mediante un índice de integridad biológica (IBI) utilizando a las aves como indicadoras. Se seleccionaron sitios de manglar y popal-tular con diferente grado de perturbación (conservado, semiconservado y perturbado). Un análisis de cambio de cobertura con imágenes de satélites Landsat MSS 1976 y ETM 2002 mostró pérdidas de cobertura de manglar de 21─31 % y tasas de deforestación anual de 0.8 ─ 1.2 %. El registro histórico de especies de aves fue de 328, detectándose 189 en este estudio, de las cuales 13 fueron nuevos registros para la Reserva. Se encontraron diferencias significativas en el número de especies entre sitios (α=0.05). De acuerdo con el estimador de cobertura basado en abundancias,... |
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Palavras-chave: Aves; Integridad biológica; Diversidad; Calidad del agua; Humedales birds; Biological integrity; Diversity; Water quality; Wetlands. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/822 |
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| Córdova Avalos, Antonio. |
| Se evaluó la salud de los Pantanos de Centla, Tabasco, mediante un índice de integridad biológica (IBI) utilizando a las aves como indicadoras. Se seleccionaron sitios de manglar y popal-tular con diferente grado de perturbación (conservado, semiconservado y perturbado). Un análisis de cambio de cobertura con imágenes de satélites Landsat MSS 1976 y ETM 2002 mostró pérdidas de cobertura de manglar de 21─31 % y tasas de deforestación anual de 0.8 ─ 1.2 %. El registro histórico de especies de aves fue de 328, detectándose 189 en este estudio, de las cuales 13 fueron nuevos registros para la Reserva. Se encontraron diferencias significativas en el número de especies entre sitios (α=0.05). De acuerdo con el estimador de cobertura basado en abundancias,... |
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Palavras-chave: Aves; Integridad biológica; Diversidad; Calidad del agua; Humedales birds; Biological integrity; Diversity; Water quality; Wetlands. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/801 |
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| Palomarez García, José Martín. |
| La calidad del agua del cauce de la cuenca baja del río Jamapa se ha visto impactada, principalmente, por descargas de origen urbano, así como por actividades productivas aledañas, como la agricultura y la acuacultura. Los objetivos de este estudio fueron determinar la calidad del agua del cauce de la cuenca baja del río Jamapa en sitios donde se reciben efluentes, comparar la calidad de influentes y efluentes de las granjas acuícolas, así como conocer la actitud de los pobladores aledaños al cauce, sobre la preservación del recurso hídrico. Los parámetros de calidad del agua fueron los establecidos en la NOM-001-SEMARNAT-1996, y los análisis de las muestras se realizaron de acuerdo a los métodos propuestos en las normas correspondientes. La actitud de las... |
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Palavras-chave: Río Jamapa; Calidad del agua; Granjas acuícolas; Actitud; Jamapa river; Water quality; Fish farms; Attitude; Doctorado; Agroecosistemas Tropicales. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/436 |
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| Gartin, Meredith; School of Human Evolution and Social Change, Arizona State University;; Crona, Beatrice; Stockholm Resilience Center, Stockholm University, Sweden; Center for the Study of Institutional Diversity, Arizona State University; beatrice.crona@stockholmresilience.su.se; Wutich, Amber; School of Human Evolution and Social Change, Arizona State University; Center for the Study of Institutional Diversity, Arizona State University ;; Westerhoff, Paul; Department of Civil, Environmental and Sustainable Engineering, Ira A. Fulton School of Engineering, Arizona State University ;. |
| Popular concern over water quality has important implications for public water management because it can both empower water utilities to improve service but also limit their ability to make changes. In the desert city of Phoenix, Arizona, obtaining sufficient high-quality water resources for a growing urban population poses a major challenge. Decision makers and urban hydrologists are aware of these challenges to water sustainability but the range of acceptable policy and management options available to them is constrained by public opinion. Therefore, this study examines cultural models of water quality and water management, termed ethnohydrology, among urban residents. The study yields three key findings. First, urban residents appear to have a shared... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Cultural consensus; Cultural model; Freelist; Perceptions; Phoenix; Urban; Water quality. |
| Ano: 2010 |
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| Kleppel, G. S.; Department of Biological Sciences, University at Albany, SUNY; gkleppel@csc.albany.edu; Madewell, Shirley A; Department of Biological Sciences, University at Albany, SUNY; madewell@mail.com; Hazzard, Sarah E; Department of Biological Sciences, University at Albany, SUNY; hazzads@ecostudies.org. |
| Although it has been repeatedly demonstrated that urbanization has negative environmental consequences, the conversion of land to urban use is increasing worldwide and is not likely to abate. We tested the hypothesis that different urban typologies, i.e., distributions of human population and infrastructure, differentially influence the water quality and ecological functionality of emergent marsh wetlands in New York State's Hudson River Valley. Wetlands were studied in two watersheds, defined as landscapes bounded by ridge lines, containing traditional small-town development and two watersheds containing suburban typologies. Land cover attributes were evaluated by analyzing ground-truthed, orthophotoquad data with a GIS. Water quality, the cover and... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Hudson River Valley; New York State; Buffers; Land use; Small towns; Suburbs; Trophic transfer efficiency; Urban typology; Urbanization; Water quality; Watershed; Wetlands. |
| Ano: 2004 |
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| Daloğlu, Irem; School of Natural Resources and Environment, University of Michigan; daloglu@umich.edu; Nassauer, Joan Iverson; School of Natural Resources and Environment, University of Michigan; nassauer@umich.edu; Riolo, Rick; Center for the Studies of Complex Systems, University of Michigan; rlriolo@umich.edu; Scavia, Donald; School of Natural Resources and Environment, University of Michigan; Graham Environmental Sustainability Institute, University of Michigan; scavia@umich.edu. |
| We present a modeling framework that synthesizes social, economic, and ecological aspects of landscape change to evaluate how different agricultural policy and land tenure scenarios and land management preferences affect landscape pattern and downstream water quality. We linked a stylized agent-based model (ABM) of farmers’ conservation practice adoption decisions with a water quality model, the Soil and Water Assessment Tool (SWAT), to simulate the water quality effects of changing land tenure dynamics and different policies for crop revenue insurance in lieu of commodity payments over 41 years (1970–2010) for a predominantly agricultural watershed of Lake Erie. Results show that non-operator owner involvement in land management... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: ABM; Agricultural policy; Agriculture; Conservation practice; Integrated modeling; SWAT; Water quality. |
| Ano: 2014 |
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| Water quality describes the physicochemical characteristics of the water body. These vary naturally with the weather and with the spatiotemporal variation of the water flow, i.e., the flow regime. Worldwide, biota have adapted to the variation in these variables. River channels and their riparian zones contain a rich selection of adapted species and have been able to offer goods and services for sustaining human civilizations. Many human impacts on natural riverine environments have been destructive and present opportunities for rehabilitation. It is a big challenge to satisfy the needs of both humans and nature, without sacrificing one or the other. New ways of thinking, new policies, and institutional commitment are needed to make improvements, both in... |
| Tipo: Peer-Reviewed Synthesis |
Palavras-chave: Catchment scale; Ecosystem processes; Environmental flows; Flow regime; Rivers; Water quality. |
| Ano: 2008 |
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| Lallement,Mailén Elizabeth; Juárez,Santiago Martín; Macchi,Patricio Jorge; Vigliano,Pablo Horacio. |
| Volcanic eruptions are natural phenomena with the most diverse and varied consequences, and have important effects on both terrestrial and aquatic environments. On June 4th, 2011 the volcanic Puyehue Cordón-Caulle complex (2.236 masl, 40º 32´ S-72º 2´ W, Chile) erupted explosively ejecting on the first day, 950 million metric tons of ashes into the atmosphere. Due to predominant westerly winds, 24 million hectares of Argentinian Patagonia were covered by the ashfall. We studied three streams in northwestern Patagonia in order to explore the ash fall impact and possible recovery processes in water quality and macroinvertebrate communities. We selected three streams representing maximum, intermediate and minimum ash deposition levels. For each stream, we... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Volcanic ash; Impact; Arthropods; Functional feeding groups; Water quality. |
| Ano: 2014 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2014000100008 |
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| Wrublack,Suzana C.; Mercante,Erivelto; Boas,Marcio A. Vilas; Prudente,Victor H. R.; Silva,Jefferson L. G.. |
| ABSTRACT This study demonstrates using remote sensing, geographic information systems and multivariate statistics to study water quality in an agricultural watershed. The monitoring of water quality in the watershed of Lontras's river in the southwestern region of the State of Paraná had been done in 2012 and 2013 with a multi-parameter probe in ten sites that were defined upstream and downstream watershed, during four different seasons. Mosaicked images were used from Google Earth, Digital Elevation Model and soil types of maps, defined as the explanatory variables. The definition of the areas of influence and multivariate statistical techniques, particularly the Redundancy Analysis (RDA), were used for the correlation between variables. In a spring area,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Geoprocessing; Mapping land use and occupation; Water quality. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000100074 |
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| Registros recuperados: 343 | |
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