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241.
Vizuete Jorge Hernández-Moreno David López-Beceiro Ana Fidalgo Luis Eusebio Soler Francisco Pérez-López Marcos Míguez-Santiyán María Prado 《Environmental science and pollution research international》2022,29(36):54292-54308
Environmental Science and Pollution Research - In the present study, mercury (Hg), cadmium (Cd), lead (Pb), selenium (Se), and arsenic (As) were measured in liver, kidney, and feathers of adult,... 相似文献
242.
Achcar Jorge Alberto de Oliveira Ricardo Puziol 《Environmental Modeling and Assessment》2022,27(2):385-398
Environmental Modeling & Assessment - In this study, non-homogeneous Poisson processes (NHPP) are used to analyze climate data. The data were collected over a certain period time and consist of... 相似文献
243.
Coastal changes in the Ebro delta: Natural and human factors 总被引:1,自引:0,他引:1
The development of the delta of the River Ebro (Ebre) has, during recent centuries, been controlled by both natural and man-induced
factors. Deforestation by man of the Ebro drainage basin favoured a fast progradation of the deltaic system until this century,
when many dams were constructed along the river Ebro and its tributaries. As the sediment load of the river has been retained
behind the dams, the river sediment discharge has been drastically reduced and erosive processes have become dominant in the
Ebro delta coastal area, changing it from a river-wave to a sea-wave-dominated coast. This situation leads to a reshaping
of the nearshore delta area and a redistribution of the pre-existing beach sediment, and significant erosion has already occurred
in some zones. If these conditions continue in the future, severe changes will take place in the Ebro delta, in addition to
the effects of a relative sea level rise. The future development of this delta may be similar to that of abandoned deltaic
lobes, but faster. The present study shows, how coastal changes generated by anthropogenic factors can be faster and more
drastic than those induced only by natural factors. 相似文献
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Luisa F. Mariscal-Mendizábal Rosalba Sevilla-Montoya Alfonso J. Martínez-García Carmen Alaez-Verson Irma E. Monroy-Muñoz Javier Pérez-Durán Jorge A. Cerón-Albarrán Karol Carrillo-Sánchez Carolina Molina-Garay Luis L. Flores-Lagunes Marco Jimenez-Olivares Mónica Aguinaga-Ríos 《黑龙江环境通报》2019,39(11):998-1004
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M. Margarita Préndez Jorge L. Ortiz Santiago R. Zolezzi 《Environmental monitoring and assessment》1993,24(2):99-115
Santiago is a city of over 4.5 million inhabitants and about 415000 motor vehicles using leaded gasoline. Twenty-four-hour samples were taken of total and fractionated particulate matter using a low-volume system and two Andersen cascade impactors, between 1978 and 1989 at different sites of the city of Santiago. Lead concentrations were determined by atomic absorption spectrophotometry. The results show that Pb concentrations vary greatly depending on the site selected. Higher values are always detected near the city center. An annual variation with the highest value during the autumn-winter period (May–July) is clearly observed. Lead concentrations versus size are clearly biased to particles smaller than 2 µm. A correlation is observed between Pb concentrations and the suspended particulate matter under 3 µm at different sites of the city. The curves of Pb concentration versus size of the aerosols emitted by the gas exhaust of motor vehicles using leaded gasoline are similar to those of the atmospheric aerosols. 相似文献