M. Bonansea, Claudia Ledesma, C. Rodríguez, Angel R. S. Delgado
The satellite images provided by remote sensors represent an important tool for monitoring, controlling and administering water resources. The aim of this work was to model the spatial distribution of the concentration of chlorhophyll-a and the limit of the photic zone in the Rio Tercero reservoir (Cordoba-Argentina), using images from CBERS-2B satellite and a geographical information system (SIG). We selected 15 samples places wherefrom we measured physical, chemical and biological parameters during the fall of 2008. By using a georeferenced image from sensor CBERS-2B and performing an analysis of the principal components (ACP), we were able to identify associations between variables and reflectance values of the satellite bands. Based on these associations and with simple regression models, we were able to know the spatial distribution of the variables: concentration of chlorophyll-a (R2 = 0, 73) and the limit of the photic zone (R2 = 0, 78) in the reservoir as a whole. We may conclude thata there exists a negative correlation between the concentration of chlorophyll-a and the water transparency in reservoir Rio Tercero, as well as that the sensor used allows us to evaluate the quality of the water in a relative short time.
{"title":"Concentration of chlorhophyll-a and the limit of the photic zone in the Third River reservoir (Córdoba-Argentina), using images from CBERS-2B satellite","authors":"M. Bonansea, Claudia Ledesma, C. Rodríguez, Angel R. S. Delgado","doi":"10.4136/AMBI-AGUA.847","DOIUrl":"https://doi.org/10.4136/AMBI-AGUA.847","url":null,"abstract":"The satellite images provided by remote sensors represent an important tool for monitoring, controlling and administering water resources. The aim of this work was to model the spatial distribution of the concentration of chlorhophyll-a and the limit of the photic zone in the Rio Tercero reservoir (Cordoba-Argentina), using images from CBERS-2B satellite and a geographical information system (SIG). We selected 15 samples places wherefrom we measured physical, chemical and biological parameters during the fall of 2008. By using a georeferenced image from sensor CBERS-2B and performing an analysis of the principal components (ACP), we were able to identify associations between variables and reflectance values of the satellite bands. Based on these associations and with simple regression models, we were able to know the spatial distribution of the variables: concentration of chlorophyll-a (R2 = 0, 73) and the limit of the photic zone (R2 = 0, 78) in the reservoir as a whole. We may conclude thata there exists a negative correlation between the concentration of chlorophyll-a and the water transparency in reservoir Rio Tercero, as well as that the sensor used allows us to evaluate the quality of the water in a relative short time.","PeriodicalId":38374,"journal":{"name":"Revista Ambiente e Agua","volume":"7 1","pages":"61-71"},"PeriodicalIF":0.0,"publicationDate":"2012-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70669099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
José Augusto Albuquerque Dos Santos, V. Valin, A. D. S. F. Filho
The genus Physa are among the most common and widespread fresh-water snails and are frequently associated with the genus Lymnaea and Biomphalaria, typically occupying the same habitat and being hosts of trematodes that can cause disease in humans. Several studies have evaluated the control of snails through the use of plant-derived molluscicides; however, few such studies exist regarding the genus Physa. Determining the correct lethal doses of [latex of Euphorbia splendens] is important for the control of the Physa cubensis snail. In one experimental model, 150 snails from Jacarepagua, Rio de Janeiro, RJ were used. After acclimatization for 72 hours, the snails were divided into groups of 10 and placed into beakers containing different doses, each at a temperature of 26±1oC and a relative humidity of 80±10%. The results demonstrated LD50 of 1.08 µL/L and LD90 of 3.41 µL/L, without significant changes in the physical or chemical parameters of the solutions. We conclude that E. splendens latex had a significant effect on P. cubensis in the laboratory setting.
{"title":"Determination of the lethal doses LD50 and LD90 of Euphorbia splendens var. hislopii latex on Physa cubensis Pfeiffer","authors":"José Augusto Albuquerque Dos Santos, V. Valin, A. D. S. F. Filho","doi":"10.4136/AMBI-AGUA.860","DOIUrl":"https://doi.org/10.4136/AMBI-AGUA.860","url":null,"abstract":"The genus Physa are among the most common and widespread fresh-water snails and are frequently associated with the genus Lymnaea and Biomphalaria, typically occupying the same habitat and being hosts of trematodes that can cause disease in humans. Several studies have evaluated the control of snails through the use of plant-derived molluscicides; however, few such studies exist regarding the genus Physa. Determining the correct lethal doses of [latex of Euphorbia splendens] is important for the control of the Physa cubensis snail. In one experimental model, 150 snails from Jacarepagua, Rio de Janeiro, RJ were used. After acclimatization for 72 hours, the snails were divided into groups of 10 and placed into beakers containing different doses, each at a temperature of 26±1oC and a relative humidity of 80±10%. The results demonstrated LD50 of 1.08 µL/L and LD90 of 3.41 µL/L, without significant changes in the physical or chemical parameters of the solutions. We conclude that E. splendens latex had a significant effect on P. cubensis in the laboratory setting.","PeriodicalId":38374,"journal":{"name":"Revista Ambiente e Agua","volume":"7 1","pages":"21-30"},"PeriodicalIF":0.0,"publicationDate":"2012-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70669192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
C. S. Catelani, G. T. Batista, M. S. Targa, N. Dias
The determination of priority areas for the re-establishment of forest cover in watersheds is directly associated to the probability of effective success of restoration processes. However, considering the complexity of the analysis and the large amount of spatial data necessary to accomplish that purpose, state of the art technological tools capable of processing multicriteria analysis to support decision making are necessary. Thus, the current work developed for an area of 476 km² corresponding to the Una river watershed in the municipal district of
{"title":"Determinação de áreas prioritárias para o restabelecimento da cobertura florestal, apoiada no uso de geotecnologias","authors":"C. S. Catelani, G. T. Batista, M. S. Targa, N. Dias","doi":"10.4136/AMBI-AGUA.964","DOIUrl":"https://doi.org/10.4136/AMBI-AGUA.964","url":null,"abstract":"The determination of priority areas for the re-establishment of forest cover in watersheds is directly associated to the probability of effective success of restoration processes. However, considering the complexity of the analysis and the large amount of spatial data necessary to accomplish that purpose, state of the art technological tools capable of processing multicriteria analysis to support decision making are necessary. Thus, the current work developed for an area of 476 km² corresponding to the Una river watershed in the municipal district of","PeriodicalId":38374,"journal":{"name":"Revista Ambiente e Agua","volume":"7 1","pages":"113-126"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70670440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Thalita Beatriz Antunes Klais, Fabrício Bau Dalmas, Renata Porto Morais, Gabriela Atique, Giancarlo Lastoria, Antonio Conceição Paranhos Filho
The natural vulnerability of the environment is prone to natural agents like geomorphology, geology, soils and its stability in relation to morphogenesis and pedogenesis. The environmental vulnerability is defined as the susceptibility of the environment to any potential impact caused by human actions. The objectives of this work were the evaluation of the land use at Ponta Pora municipality, located on the border between Mato Grosso do Sul (Brazil) and Paraguay, as well as the determination of its natural and environmental vulnerability. For this purpose, maps of geology, agricultural suitability, slope, topographic sheets and Landsat TM satellite images were used. The natural vulnerability had average values in 62.8% of the study area, low values in 20.7%, high in 12.8% and very high values in 3.7%. The high values of natural vulnerability corresponded to high values of environmental vulnerability as well. So it has been observed that 75.2% of the municipality, corresponding to about 400,704 ha has high to very high environmental vulnerability. These numbers have been found mainly in areas occupied by pasture and crop lands.
{"title":"Vulnerabilidade natural e ambiental do município de Ponta Porã, Mato Grosso do Sul, Brasil","authors":"Thalita Beatriz Antunes Klais, Fabrício Bau Dalmas, Renata Porto Morais, Gabriela Atique, Giancarlo Lastoria, Antonio Conceição Paranhos Filho","doi":"10.4136/AMBI-AGUA.786","DOIUrl":"https://doi.org/10.4136/AMBI-AGUA.786","url":null,"abstract":"The natural vulnerability of the environment is prone to natural agents like geomorphology, geology, soils and its stability in relation to morphogenesis and pedogenesis. The environmental vulnerability is defined as the susceptibility of the environment to any potential impact caused by human actions. The objectives of this work were the evaluation of the land use at Ponta Pora municipality, located on the border between Mato Grosso do Sul (Brazil) and Paraguay, as well as the determination of its natural and environmental vulnerability. For this purpose, maps of geology, agricultural suitability, slope, topographic sheets and Landsat TM satellite images were used. The natural vulnerability had average values in 62.8% of the study area, low values in 20.7%, high in 12.8% and very high values in 3.7%. The high values of natural vulnerability corresponded to high values of environmental vulnerability as well. So it has been observed that 75.2% of the municipality, corresponding to about 400,704 ha has high to very high environmental vulnerability. These numbers have been found mainly in areas occupied by pasture and crop lands.","PeriodicalId":38374,"journal":{"name":"Revista Ambiente e Agua","volume":"7 1","pages":"277-290"},"PeriodicalIF":0.0,"publicationDate":"2012-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70668259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Gilvanise Alves Tito, L. H. G. Chaves, H. C. Guerra
Objetivando-se avaliar o efeito da aplicacao de doses de bentonita (0, 30 e 60 t ha-1) na mobilidade do cadmio num Argissolo, realizaram-se ensaios de mobilidade do referido metal em colunas de solo com diferentes concentracoes de cadmio (50, 250 e 450 mg de kg-1de solo) submetidas a lixiviacao num regime saturado, determinando-se a densidade do fluxo e a velocidade de fluxo. O cadmio foi deslocado por pulso, isto e, a solucao contendo o cadmio inicialmente infiltrou no solo por um determinado tempo quando entao a lixiviacao foi continuada com agua destilada. Lixiviados foram coletados a cada 10 minutos durante 80 minutos de percolacao. As solucoes percoladas, expressas em volume de poros, foram 6,33; 2,28 e 1,93 para os tratamentos de bentonita de 0, 30 e 60 t ha-1 sendo um volume de poros igual a 1,22 cm3. As concentracoes de cadmio determinadas por espectrofotometria de absorcao atomica. Ao final dos ensaios, as colunas foram desmontadas e as concentracoes de cadmio no solo a diferentes profundidades (0-10, 10-20, 20-30 e 30-40 cm), foram tambem determinadas. Os resultados permitiram concluir que a densidade de fluxo e a velocidade de fluxo da solucao foram reduzidas significativamente com a incorporacao de bentonita ao solo. Os teores de cadmio do solo nao afetaram a densidade de fluxo nem a velocidade de fluxo da solucao. O aumento das doses de bentonita favoreceu a adsorcao do cadmio pelo solo.
剂量评估的影响应用程序的膨润土30到60 t(0, 1)在流动在Argissolo cadmio发生流动测试中金属在不同的土壤和列concentracoes cadmio(50、250和450毫克公斤)的土壤物质lixiviacao饱和系统,通过建立流动通量密度和速度。镉被脉冲置换，即含镉溶液最初渗入土壤一段时间，然后用蒸馏水继续浸出。渗滤液每10分钟收集一次，过滤80分钟。渗滤液，以孔隙体积表示，为6.33;0、30和60 t ha-1的膨润土处理分别为2.28和1.93，孔隙体积为1.22 cm3。用原子吸收分光光度法测定镉浓度。试验结束时，拆除柱，测定不同深度(0-10、10-20、20-30和30-40 cm)土壤中的镉浓度。结果表明，膨润土的加入显著降低了溶质的流动密度和流速。土壤中镉含量不影响通量密度和溶液流速。膨润土用量的增加有利于土壤对镉的吸附。
{"title":"Effect of the bentonite application on the cadmium mobility in an Argisol","authors":"Gilvanise Alves Tito, L. H. G. Chaves, H. C. Guerra","doi":"10.4136/AMBI-AGUA.901","DOIUrl":"https://doi.org/10.4136/AMBI-AGUA.901","url":null,"abstract":"Objetivando-se avaliar o efeito da aplicacao de doses de bentonita (0, 30 e 60 t ha-1) na mobilidade do cadmio num Argissolo, realizaram-se ensaios de mobilidade do referido metal em colunas de solo com diferentes concentracoes de cadmio (50, 250 e 450 mg de kg-1de solo) submetidas a lixiviacao num regime saturado, determinando-se a densidade do fluxo e a velocidade de fluxo. O cadmio foi deslocado por pulso, isto e, a solucao contendo o cadmio inicialmente infiltrou no solo por um determinado tempo quando entao a lixiviacao foi continuada com agua destilada. Lixiviados foram coletados a cada 10 minutos durante 80 minutos de percolacao. As solucoes percoladas, expressas em volume de poros, foram 6,33; 2,28 e 1,93 para os tratamentos de bentonita de 0, 30 e 60 t ha-1 sendo um volume de poros igual a 1,22 cm3. As concentracoes de cadmio determinadas por espectrofotometria de absorcao atomica. Ao final dos ensaios, as colunas foram desmontadas e as concentracoes de cadmio no solo a diferentes profundidades (0-10, 10-20, 20-30 e 30-40 cm), foram tambem determinadas. Os resultados permitiram concluir que a densidade de fluxo e a velocidade de fluxo da solucao foram reduzidas significativamente com a incorporacao de bentonita ao solo. Os teores de cadmio do solo nao afetaram a densidade de fluxo nem a velocidade de fluxo da solucao. O aumento das doses de bentonita favoreceu a adsorcao do cadmio pelo solo.","PeriodicalId":38374,"journal":{"name":"Revista Ambiente e Agua","volume":"7 1","pages":"18-29"},"PeriodicalIF":0.0,"publicationDate":"2012-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70669560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jean Michel Corrêa, P. Gerhard, R. D. O. Figueiredo
Comunidades de peixes podem se distribuir no espaco e no tempo de maneira organizada, seguindo um padrao que pode ser percebido pela associacao ou agrupamento das especies e pela relacao de algumas especies com determinados habitats. O numero reduzido de estudos e o pouco conhecimento da fauna aquatica na Amazonia resultam em sub-estimativas da diversidade da ictiofauna de igarapes (riachos amazonicos). No presente estudo, em tres microbacias predominantemente ocupadas por agricultura familiar, foram coletados 2.117 peixes, distribuidos em sete ordens, 13 familias, 27 generos e 43 especies. A especie mais abundante em todas as amostras coletadas foi Hyphessobrycon heterorhabdus, com 337 individuos, seguido por Bryconops melanurus, com 326 individuos. A riqueza de especies foi maior num trecho do Igarape Pachiba (IGPA-B), com 21 especies. O Indice de Dominância de Simpson mostrou o valor mais alto no trecho B do Igarape Cumaru, com valor 0,43, enquanto o Indice de Diversidade de Shannon revelou que o IGPA-B possuiu a maior diversidade, com valor 2,39. Iguanodectes rachovii foi a especie amostrada com mais constância, e ocorreu em 50% das amostras. Os resultados demonstraram que trechos medios dos igarapes apresentam maior diversidade de especies, respondendo ao tamanho do habitat. Neste estudo foi possivel observar que microbacias agricolas dominadas por agricultura de pequeno porte pode suportar uma diversidade de peixes de igarapes razoavel.
{"title":"Ictiofauna de igarapés de pequenas bacias de drenagem em área agrícola do Nordeste Paraense, Amazônia Oriental","authors":"Jean Michel Corrêa, P. Gerhard, R. D. O. Figueiredo","doi":"10.4136/AMBI-AGUA.739","DOIUrl":"https://doi.org/10.4136/AMBI-AGUA.739","url":null,"abstract":"Comunidades de peixes podem se distribuir no espaco e no tempo de maneira organizada, seguindo um padrao que pode ser percebido pela associacao ou agrupamento das especies e pela relacao de algumas especies com determinados habitats. O numero reduzido de estudos e o pouco conhecimento da fauna aquatica na Amazonia resultam em sub-estimativas da diversidade da ictiofauna de igarapes (riachos amazonicos). No presente estudo, em tres microbacias predominantemente ocupadas por agricultura familiar, foram coletados 2.117 peixes, distribuidos em sete ordens, 13 familias, 27 generos e 43 especies. A especie mais abundante em todas as amostras coletadas foi Hyphessobrycon heterorhabdus, com 337 individuos, seguido por Bryconops melanurus, com 326 individuos. A riqueza de especies foi maior num trecho do Igarape Pachiba (IGPA-B), com 21 especies. O Indice de Dominância de Simpson mostrou o valor mais alto no trecho B do Igarape Cumaru, com valor 0,43, enquanto o Indice de Diversidade de Shannon revelou que o IGPA-B possuiu a maior diversidade, com valor 2,39. Iguanodectes rachovii foi a especie amostrada com mais constância, e ocorreu em 50% das amostras. Os resultados demonstraram que trechos medios dos igarapes apresentam maior diversidade de especies, respondendo ao tamanho do habitat. Neste estudo foi possivel observar que microbacias agricolas dominadas por agricultura de pequeno porte pode suportar uma diversidade de peixes de igarapes razoavel.","PeriodicalId":38374,"journal":{"name":"Revista Ambiente e Agua","volume":"7 1","pages":"214-230"},"PeriodicalIF":0.0,"publicationDate":"2012-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70667793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. D. Rodrigues, G. Malafaia, Adivane Terezinha Costa, Hermínio Arias Nalini Júnior
In this study, we adapted a Rapid Assessment Protocol methodology (RAP) to assess the environmental conditions of the Gualaxo do Norte River, East-Southeast of the Quadrilatero Ferrifero, MG, Minas Gerais, Brazil. Then the RAP was applied to 31 sections along its course and the applicability/viability of the adapted instrument using scientific information on the history and current use and occupation of the Gualaxo do Norte River basin was evaluated. The results showed that RAP was effectively adjusted to evaluate environmental conditions of river under investigation. However, it was observed the need to evaluate parameters that can have their appearance appraisal influenced by the season of the year (dry or wet) or by their location in the basin. It was concluded that the implementation/adaptation of RAPs should be a continuous process of adjustments and improvements to the extent that their employment may cover a diverse range of rivers, watersheds and ecoregions.
{"title":"Adequação e avaliação da aplicabilidade de um Protocolo de Avaliação Rápida na bacia do rio Gualaxo do Norte, Leste-Sudeste do Quadrilátero Ferrífero, MG, Brasil","authors":"A. D. Rodrigues, G. Malafaia, Adivane Terezinha Costa, Hermínio Arias Nalini Júnior","doi":"10.4136/AMBI-AGUA.872","DOIUrl":"https://doi.org/10.4136/AMBI-AGUA.872","url":null,"abstract":"In this study, we adapted a Rapid Assessment Protocol methodology (RAP) to assess the environmental conditions of the Gualaxo do Norte River, East-Southeast of the Quadrilatero Ferrifero, MG, Minas Gerais, Brazil. Then the RAP was applied to 31 sections along its course and the applicability/viability of the adapted instrument using scientific information on the history and current use and occupation of the Gualaxo do Norte River basin was evaluated. The results showed that RAP was effectively adjusted to evaluate environmental conditions of river under investigation. However, it was observed the need to evaluate parameters that can have their appearance appraisal influenced by the season of the year (dry or wet) or by their location in the basin. It was concluded that the implementation/adaptation of RAPs should be a continuous process of adjustments and improvements to the extent that their employment may cover a diverse range of rivers, watersheds and ecoregions.","PeriodicalId":38374,"journal":{"name":"Revista Ambiente e Agua","volume":"7 1","pages":"231-244"},"PeriodicalIF":0.0,"publicationDate":"2012-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70669359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Carolina Hortêncio Malheiros, E. L. Hardoim, Zoraidy Marques de Lima, R. Amorim
In this study spatial and temporal variations in limnological characteristics of a dam located in one of the headwaters of the Sao Lourenco River (Campo Verde, MT) were evaluated. The surrounding area is used for soybeans cultivation, corn, cotton, and pasture. We examined biotic (heterotrophic bacteria and chlorophyll a) and abiotic factors (precipitation, air and water temperature, electrical conductivity, dissolved oxygen, pH, turbidity, total phosphorus, nitrite, nitrate, and ammonia nitrogen) at three sampling sites along the longitudinal axis of the water body, and at three depths (at the surface, the Secchi depth, and at the sediment-water interface). Samples were taken bimonthly during 2010. Spearman correlation analysis was used to examine the relationship between biotic and
{"title":"Qualidade da água de uma represa localizada em área agrícola (Campo Verde, MT, Brasil)","authors":"Carolina Hortêncio Malheiros, E. L. Hardoim, Zoraidy Marques de Lima, R. Amorim","doi":"10.4136/AMBI-AGUA.904","DOIUrl":"https://doi.org/10.4136/AMBI-AGUA.904","url":null,"abstract":"In this study spatial and temporal variations in limnological characteristics of a dam located in one of the headwaters of the Sao Lourenco River (Campo Verde, MT) were evaluated. The surrounding area is used for soybeans cultivation, corn, cotton, and pasture. We examined biotic (heterotrophic bacteria and chlorophyll a) and abiotic factors (precipitation, air and water temperature, electrical conductivity, dissolved oxygen, pH, turbidity, total phosphorus, nitrite, nitrate, and ammonia nitrogen) at three sampling sites along the longitudinal axis of the water body, and at three depths (at the surface, the Secchi depth, and at the sediment-water interface). Samples were taken bimonthly during 2010. Spearman correlation analysis was used to examine the relationship between biotic and","PeriodicalId":38374,"journal":{"name":"Revista Ambiente e Agua","volume":"7 1","pages":"245-262"},"PeriodicalIF":0.0,"publicationDate":"2012-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70669693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G. N. Carvalho, Mariana A. Giannotti, S. M. Sartor, J. A. Quintanilha
Coastal zones are complex areas that include marine and terrestrial environments. Besides its huge environmental wealth, they also attracts humans because provides food, recreation, business, and transportation, among others. Some difficulties to manage these areas are related with their complexity, diversity of interests and the absence of standardization to collect and share data to scientific community, public agencies, among others. The idea to organize, standardize and share this information based on Web Atlas is essential to support planning and decision making issues. The construction of a spatial database integrating the environmental business, to be used on Spatial Data Infrastructure (SDI) is illustrated by a bioindicator that indicates the quality of the sediments. The models show the phases required to build Macrobenthos spatial database based on Santos Metropolitan Region as a reference. It is concluded that, when working with environmental data the structuring of knowledge in a conceptual model is essential for their subsequent integration into the SDI. During the modeling process it can be noticed that methodological issues related to the collection process may obstruct or prejudice the integration of data from different studies of the same area. The development of a database model, as presented in this study, can be used as a reference for further research with similar goals.
{"title":"Modelagem para integração de dados sobre macrobentos em Infraestrutura de Dados Espaciais","authors":"G. N. Carvalho, Mariana A. Giannotti, S. M. Sartor, J. A. Quintanilha","doi":"10.4136/AMBI-AGUA.774","DOIUrl":"https://doi.org/10.4136/AMBI-AGUA.774","url":null,"abstract":"Coastal zones are complex areas that include marine and terrestrial environments. Besides its huge environmental wealth, they also attracts humans because provides food, recreation, business, and transportation, among others. Some difficulties to manage these areas are related with their complexity, diversity of interests and the absence of standardization to collect and share data to scientific community, public agencies, among others. The idea to organize, standardize and share this information based on Web Atlas is essential to support planning and decision making issues. The construction of a spatial database integrating the environmental business, to be used on Spatial Data Infrastructure (SDI) is illustrated by a bioindicator that indicates the quality of the sediments. The models show the phases required to build Macrobenthos spatial database based on Santos Metropolitan Region as a reference. It is concluded that, when working with environmental data the structuring of knowledge in a conceptual model is essential for their subsequent integration into the SDI. During the modeling process it can be noticed that methodological issues related to the collection process may obstruct or prejudice the integration of data from different studies of the same area. The development of a database model, as presented in this study, can be used as a reference for further research with similar goals.","PeriodicalId":38374,"journal":{"name":"Revista Ambiente e Agua","volume":"7 1","pages":"195-213"},"PeriodicalIF":0.0,"publicationDate":"2012-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70668503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The objective of the study was to verify the granulometric composition of bottom sediments along the longitudinal profile of the Paraguay River between the outfall of the Cabacal River and the city of Caceres, Mato Grosso, comprised by the geographic coordinates 15o58'00'' and 16o50'00'' South Latitude and 57o40'00'' and 57o44'00'' West Longitude. Work activity was conducted to characterize the sites and sediments collection with Van Veen sediment sampler (seven samples); textural analysis of the sediments by the pipetting and sieving method (the method uses a combination of sieving and sedimentation). The Paraguay River exhibits a meandering style with two distinct periods (periodic flooding regime and drought) that associated with of bottom sediments alternate processes of erosion, transport and deposition from the discernible changes in the complex landscaping. Thus, the concentration of sand in the bed load transported in the channel (five samples) is related to environmental elements and land use. The fine sediments are transferred to the features (bays and ponds) and flood plain; the intense fluvial dynamics and the course (alluvial deposition areas) contribute to changes in channel and morphologic features (capacity transport and sediment depositions).
{"title":"Pantanal de Cáceres: composição granulométrica dos sedimentos de fundo no rio Paraguai entre a foz do rio Cabaçal e a cidade de Cáceres, Mato Grosso, Brasil","authors":"G. Leandro, C. A. Souza","doi":"10.4136/AMBI-AGUA.876","DOIUrl":"https://doi.org/10.4136/AMBI-AGUA.876","url":null,"abstract":"The objective of the study was to verify the granulometric composition of bottom sediments along the longitudinal profile of the Paraguay River between the outfall of the Cabacal River and the city of Caceres, Mato Grosso, comprised by the geographic coordinates 15o58'00'' and 16o50'00'' South Latitude and 57o40'00'' and 57o44'00'' West Longitude. Work activity was conducted to characterize the sites and sediments collection with Van Veen sediment sampler (seven samples); textural analysis of the sediments by the pipetting and sieving method (the method uses a combination of sieving and sedimentation). The Paraguay River exhibits a meandering style with two distinct periods (periodic flooding regime and drought) that associated with of bottom sediments alternate processes of erosion, transport and deposition from the discernible changes in the complex landscaping. Thus, the concentration of sand in the bed load transported in the channel (five samples) is related to environmental elements and land use. The fine sediments are transferred to the features (bays and ponds) and flood plain; the intense fluvial dynamics and the course (alluvial deposition areas) contribute to changes in channel and morphologic features (capacity transport and sediment depositions).","PeriodicalId":38374,"journal":{"name":"Revista Ambiente e Agua","volume":"7 1","pages":"263-276"},"PeriodicalIF":0.0,"publicationDate":"2012-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70669429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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