Revista Ambiente e Agua最新文献_第6页

Cyanobacteria detection in Guarapiranga Reservoir (São Paulo State, Brazil) using Landsat TM and ETM+ images 利用Landsat TM和ETM+图像检测巴西<s:1>圣保罗州瓜拉皮兰加水库蓝藻

Revista Ambiente e Agua Pub Date : 2014-06-22 DOI: 10.4136/AMBI-AGUA.1327

I. Ogashawara, E. Alcântara, J. Stech, J. Tundisi

{"title":"Cyanobacteria detection in Guarapiranga Reservoir (São Paulo State, Brazil) using Landsat TM and ETM+ images","authors":"I. Ogashawara, E. Alcântara, J. Stech, J. Tundisi","doi":"10.4136/AMBI-AGUA.1327","DOIUrl":"https://doi.org/10.4136/AMBI-AGUA.1327","url":null,"abstract":"Algae bloom is one of the major consequences of the eutrophication of aquatic systems, including algae capable of producing toxic substances. Among these are several species of cyanobacteria, also known as blue-green algae, that have the capacity to adapt themselves to changes in the water column. Thus, the horizontal distribution of cyanobacteria harmful algae blooms (CHABs) is essential, not only to the environment, but also for public health. The use of remote sensing techniques for mapping CHABs has been explored by means of bio-optical modeling of phycocyanin (PC), a unique inland waters cyanobacteria pigment. However, due to the small number of sensors with a spectral band of the PC absorption feature, it is difficult to develop semi-analytical models. This study evaluated the use of an empirical model to identify CHABs using TM and ETM+ sensors aboard Landsat 5 and 7 satellites. Five images were acquired for applying the model. Besides the images, data was also collected in the Guarapiranga Reservoir, in Sao Paulo Metropolitan Region, regarding the cyanobacteria cell count (cells/mL), which was used as an indicator of CHABs biomass. When model values were analyzed excluding calibration factors for temperate lakes, they showed a medium correlation (R2=0.81, p=0.036), while when the factors were included the model showed a high correlation (R2=0.96, p=0.003) to the cyanobacteria cell count. The empirical model analyzed proved useful as an important tool for policy makers, since it provided information regarding the horizontal distribution of CHABs which could not be acquired from traditional monitoring techniques.","PeriodicalId":38374,"journal":{"name":"Revista Ambiente e Agua","volume":"26 3 1","pages":"224-238"},"PeriodicalIF":0.0,"publicationDate":"2014-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4136/AMBI-AGUA.1327","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70662902","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}

引用次数: 8

Correlação entre qualidade da água e variabilidade da precipitação no sul do Estado do Amapá amapa州南部水质与降水变异性的相关性

Revista Ambiente e Agua Pub Date : 2014-06-22 DOI: 10.4136/AMBI-AGUA.1287

Brunna Stefanny Sangel de Oliveira, A. Cunha

引用次数: 25

Exposure to occupational dust and changes in pulmonary function among cobblestone paving workers of Jimma, Ethiopia 埃塞俄比亚吉马鹅卵石铺路工人职业性粉尘暴露与肺功能变化

Revista Ambiente e Agua Pub Date : 2014-03-21 DOI: 10.4136/AMBI-AGUA.1227

Kalkidan Hassen, Mohammed Ibrahim

{"title":"Exposure to occupational dust and changes in pulmonary function among cobblestone paving workers of Jimma, Ethiopia","authors":"Kalkidan Hassen, Mohammed Ibrahim","doi":"10.4136/AMBI-AGUA.1227","DOIUrl":"https://doi.org/10.4136/AMBI-AGUA.1227","url":null,"abstract":"The classic diseases of \"dusty\" occupations may be on decline, but they are not yet extinct. Studies have found associations between changes in ambient particulate air pollution and increased cardiorespiratory morbidity and mortality. A cross-sectional comparative study design was employed on 127 male nonsmoker cobblestone paving workers and 194 matched employed office workers as a reference in order to assess changes in pulmonary function related to dust exposure among cobblestone road paving workers of Jimma zone, Ethiopia. Data was collected using structured questionnaires and spirometric measurements after ethical clearance was obtained. Data was analyzed using unpaired t-tests to examine the differences between the groups. P-values equal or less than 0.05 were considered statistically significant; odds were calculated at a 95% confidence interval. Cobblestone road paving workers had significantly higher odds of respiratory symptoms, dry cough (p < 0.05), cough (p < 0.01) and sore throat (p< 0.001) compared to the reference. The FEV1 for workers exposed to cobblestone road paving workers ranged between 3.12 - 4.73 L, with a mean of 3.96 ± 0.6 L, significantly lower than the reference groups who had a range of 3.3 - 4.78 L and a mean of 4.01 ± 0.6 L (p < 0.05). The mean value of the ratio of FEV1/FVC was significantly decreased in the cobblestone road paving workers compared to the controls (87.2 (SD 4.3) v 89.5 (SD 5.4), p = 0.01). In conclusion, the study revealed clear evidence of the need for health education and for the promotion of activities directed towards mitigating respiratory hazards in order to foster a safe and healthy work environment.","PeriodicalId":38374,"journal":{"name":"Revista Ambiente e Agua","volume":"9 1","pages":"19-26"},"PeriodicalIF":0.0,"publicationDate":"2014-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4136/AMBI-AGUA.1227","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70662840","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}

引用次数: 5

Association between maternal exposure to particulate matter and premature birth 母亲接触颗粒物质与早产之间的关系

Revista Ambiente e Agua Pub Date : 2014-03-21 DOI: 10.4136/AMBI-AGUA.1262

Thaiza Agostini Córdoba de Lima, L. Nascimento, A. Medeiros, Veridiana de Paula Santos

引用次数: 6

Chemical and ecotoxicological assessments of water samples before and after being processed by a Water Treatment Plant 水样经水处理厂处理前后的化学及生态毒理学评估

Revista Ambiente e Agua Pub Date : 2014-03-21 DOI: 10.4136/AMBI-AGUA.1292

R. Monteiro, G. A. D. Silva, Tâmara Guindo Messias, S. Queiroz, M. Assalin, Debora Renata Cassoli, Carlos Henrique Rocha Alves, A. C. Ferreira, C. Blaise

{"title":"Chemical and ecotoxicological assessments of water samples before and after being processed by a Water Treatment Plant","authors":"R. Monteiro, G. A. D. Silva, Tâmara Guindo Messias, S. Queiroz, M. Assalin, Debora Renata Cassoli, Carlos Henrique Rocha Alves, A. C. Ferreira, C. Blaise","doi":"10.4136/AMBI-AGUA.1292","DOIUrl":"https://doi.org/10.4136/AMBI-AGUA.1292","url":null,"abstract":"Physicochemical and ecotoxicological measurements were employed to appraise the water quality of the Corumbatai River raw water (RW) intake, and that of its filtered (FW) and treated (TW) waters, processed by the Water Treatment Plant (WTP) of Piracicaba (SP, Brazil) during 2010. Some herbicides: ametrine, atrazine, simazine and tebuthiuron, were measured, with levels ranging from 0.01 to 10.3 µg L -1 . These were lower than those required to produce ecotoxicological effects to aquatic life based on published literature. Similarly, trihalomethanes, such as chloroform and bromodichloromethane produced as a result of the WTP process were also shown to be present in concentrations that would neither harm environmental nor human health. Elevated free chlorine concentrations found in FW and TW were credibly responsible for toxicity effects observed in algae and daphnids. (Pseudokirchneriella subcapitata and Daphnia magna). In contrast, results of toxicity testing conducted with Hydra attenuata suggested that this organism is resistant to free chorine and could be used for drinking water evaluations. Coupling bioassays with chemical analyses proved valuable to uncover putative cause-effect relationships existing between physical, chemical and toxic results, as well as in optimizing data interpretation of water quality.","PeriodicalId":38374,"journal":{"name":"Revista Ambiente e Agua","volume":"9 1","pages":"6-18"},"PeriodicalIF":0.0,"publicationDate":"2014-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70662871","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}

引用次数: 17

Legal analysis about drinking water quality service in Buenos Aires 布宜诺斯艾利斯市饮用水水质服务法律分析

Revista Ambiente e Agua Pub Date : 2014-03-21 DOI: 10.4136/AMBI-AGUA.1228

C. Minaverry

引用次数: 1

Parameters of Horton's infiltration model obtained through the use of a rainfall simulator, Córdoba, Argentina 利用降雨模拟器获得的Horton入渗模型参数，Córdoba，阿根廷

Revista Ambiente e Agua Pub Date : 2014-03-21 DOI: 10.4136/AMBI-AGUA.1320

J. Weber

{"title":"Parameters of Horton's infiltration model obtained through the use of a rainfall simulator, Córdoba, Argentina","authors":"J. Weber","doi":"10.4136/AMBI-AGUA.1320","DOIUrl":"https://doi.org/10.4136/AMBI-AGUA.1320","url":null,"abstract":"This study presents the results of a parameter fit of the Horton infiltration model at various sites in the city of Cordoba, Argentina. The work is based upon experimental data collected in field measurements of infiltration capacity. The study employed a portable rainfall simulator that was designed and built at the Hydraulics Laboratory, UTN – Facultad Cordoba. This equipment, which is completely detachable and defines a test plot of 1 m², can generate rainfall intensities which vary between 65 and 120 mm/h. Test site selection depended upon soil type and land use. Additionally, different initial moisture conditions were considered. The measured values were digitized and processed, and cumulative infiltration and infiltration rate curves were plotted. From these values, the parameters of Horton's model were adjusted. The quality of these parameters exceeded those of previous studies that used the double ring infiltrometer technique, and will be useful in urban hydrology design works. They represent an original contribution to knowledge of the hydrological response of urban soils in Cordoba. The proposal may be repeated elsewhere in order to expand its scientific significance.","PeriodicalId":38374,"journal":{"name":"Revista Ambiente e Agua","volume":"9 1","pages":"161-172"},"PeriodicalIF":0.0,"publicationDate":"2014-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4136/AMBI-AGUA.1320","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70663223","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}

引用次数: 2

Hidrogeologia e hidroquímica dos aquíferos fraturados associados às rochas vulcânicas ácidas no Município de Carlos Barbosa (RS) 卡洛斯巴博萨市与酸性火山岩相关的裂缝含水层的水文地质和水化学

Revista Ambiente e Agua Pub Date : 2014-03-21 DOI: 10.4136/AMBI-AGUA.1270

Taison Anderson Bortolin, Pedro Antonio Roehe Reginato, Marcos Imério Leão, Vania Elisabete Schneider

引用次数: 6

Accumulation of nutrients by forage grown in domestic sewage treatment runoff system 生活污水处理径流系统中牧草养分积累

Revista Ambiente e Agua Pub Date : 2014-02-05 DOI: 10.4136/AMBI-AGUA.1210

A. A. Nazário, Giovanni Oliveira Gracia, E. F. Reis, E. Mendonça, José Guilherme Bergamim Melline

{"title":"Accumulation of nutrients by forage grown in domestic sewage treatment runoff system","authors":"A. A. Nazário, Giovanni Oliveira Gracia, E. F. Reis, E. Mendonça, José Guilherme Bergamim Melline","doi":"10.4136/AMBI-AGUA.1210","DOIUrl":"https://doi.org/10.4136/AMBI-AGUA.1210","url":null,"abstract":"It is evident today that water quality is declining. This deterioration is mainly due to population growth and several aspects of agro-industrial production. This work therefore aimed to evaluate the performance of three forage species which are used for the treatment of domestic sewage (DS) applied to the soil via the superficial runoff technique. This experiment was conducted at the Agrarian Sciences Center of the Federal University of Espirito Santo, Brazil using a completely randomized design experimental delineation, with three replications in a split plot technique 3x5x2. The plots were composed of Brachiaria brizantha cv. Marandu, Cynodon sp. cv Tifton 85 and Paspalum atratum cv. Pojuca, with five levels of effluent application rates in the subplots: 7.91, 15.81, 23.72, 31.63 and 39.54 kg ha-1 day1 BOD. Two cuts of the plant material were done at 28-day intervals after the treatment application. The results showed that nutrient accumulation by the forage was higher than that reported in literature for Marandu grass, Tifton 85 and Pojuca. These results highlight the potential of these grasses on wastewater treatment, especially DS effluent.","PeriodicalId":38374,"journal":{"name":"Revista Ambiente e Agua","volume":"9 1","pages":"97-108"},"PeriodicalIF":0.0,"publicationDate":"2014-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70662564","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}

引用次数: 3

Proposal for a remote sensing trophic state index based upon Thematic Mapper/Landsat images 基于Thematic Mapper/Landsat影像的遥感营养状态指数建议

Revista Ambiente e Agua Pub Date : 2013-12-19 DOI: 10.4136/AMBI-AGUA.1229

E. Novo, L. Londe, C. Barbosa, C. Araujo, C. Rennó

{"title":"Proposal for a remote sensing trophic state index based upon Thematic Mapper/Landsat images","authors":"E. Novo, L. Londe, C. Barbosa, C. Araujo, C. Rennó","doi":"10.4136/AMBI-AGUA.1229","DOIUrl":"https://doi.org/10.4136/AMBI-AGUA.1229","url":null,"abstract":"This work proposes a trophic state index based on the remote sensing retrieval of chlorophyll-α concentration. For that, in situ Bidirectional Reflectance Factor (BRF) data acquired in the Ibitinga reservoir were resampled to match Landsat/TM spectral simulated bands (TM_sim bands) and used to run linear correlation with concurrent measurements of chlorophyll-α concentration. Monte Carlo simulation was then applied to select the most suitable model relating chlorophyll-α concentration and simulated TM/Landsat reflectance. TM4_sim/TM3_sim ratio provided the best model with a R2 value of 0.78. The model was then inverted to create a look-up-table (LUT) relating TM4_sim/TM3_sim ratio intervals to chlorophyll-α concentration trophic state classes covering the entire range measured in the reservoir. Atmospheric corrected Landsat TM images converted to surface reflectance were then used to generate a TM4/TM3 ratio image. The ratio image frequency distribution encompassed the range of TM4_sim/TM3_sim ratio indicating agreement between in situ and satellite data and supporting the use of satellite data to map chlorophyll-α concentration trophic state distribution in the reservoir. Based on that, the LUT was applied to a Landsat/TM ratio image to map the spatial distribution of chlorophyll-α trophic state classes in Ibitinga reservoir. Despite the stochastic selection of TM4_sim/TM3_sim ratio as the best input variable for modeling the chlorophyll-α concentration, it has a physical basis: high concentration of phytoplankton increases the reflectance in the near-infrared (TM4) and decreases the reflectance in the red (TM3). The band ratio, therefore, enhances the relationship between chlorophyll-α concentration and remotely sensed reflectance.","PeriodicalId":38374,"journal":{"name":"Revista Ambiente e Agua","volume":"8 1","pages":"65-82"},"PeriodicalIF":0.0,"publicationDate":"2013-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4136/AMBI-AGUA.1229","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70662863","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}

引用次数: 17