نتایج جستجو برای: large river

تعداد نتایج: 1105254  

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2017
F G Araújo C N Morado T T E Parente F J R Paumgartten I D Gomes

The Funil Reservoir receives a large amount of xenobiotics from the Paraíba do Sul River (PSR) from large number of industries and municipalities in the watershed. This study aimed to assess environmental quality along the longitudinal profile of the Paraíba do Sul River-Funil Reservoir system, by using biomarkers and bioindicators in a selected fish species. The raised hypothesis is that Funil...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2011
Benjamin H Mackey Joshua J Roering Michael P Lamb

Large bedrock landslides have been shown to modulate rates and processes of river activity by forming dams, forcing upstream aggradation of water and sediment, and generating catastrophic outburst floods. Less apparent is the effect of large landslide dams on river ecosystems and marine sedimentation. Combining analyses of 1-m resolution topographic data (acquired via airborne laser mapping) an...

 In contrast to existing trends and expected deteriorating water quality in the river Yamuna in Delhi which carries potential cultural economical and health importance, March 2016 water data showing improvement despite large public gathering at river bank during Cultural Festival. The reasons and factors were investigated. The paper presents the test reports of eco- enzyme which was found to be...

2017
Jason T Payne Justin J Millar Colin R Jackson Clifford A Ochs

We examined the downriver patterns of variation in taxonomic diversity of the Mississippi River bacterioplankton microbiome along 1,300 river kilometers, or approximately one third the total length of the river. The study section included portions of the Upper, Middle, and Lower Mississippi River, confluences with five tributaries draining distinct sub-basins, river cities, and extended stretch...

Journal: :Transportation Research Part A: Policy and Practice 2008

2004
J. H. Eiler T. R. Spencer J. J. Pella M. M. Masuda R. R. Holder

The National Marine Fisheries Service's Alaska Fisheries Science Center uses the NOAA Technical Memorandum series to issue informal scientific and technical publications when complete formal review and editorial processing are not appropriate or feasible. Documents within this series reflect sound professional work and may be referenced in the formal scientific and technical literature. In the ...

2011
Megan E. Gemmell

To lead a healthy lifestyle, it is essential to have a diet that includes fresh and minimally processed fruit and vegetables. A large proportion of the South African population exhibits suppressed immune systems, largely due to the HIV/AIDS epidemic. It is therefore imperative that minimally processed foods are not contaminated with potentially pathogenic microorganisms. As a result of local fr...

2013
Thomas H. DeLuca Olle Zackrisson Ingela Bergman Beatriz Díez Birgitta Bergman

There is currently limited understanding of the contribution of biological N2 fixation (diazotrophy) to the N budget of large river systems. This natural source of N in boreal river systems may partially explain the sustained productivity of river floodplains in Northern Europe where winter fodder was harvested for centuries without fertilizer amendments. In much of the world, anthropogenic pol...

ژورنال: علوم آب و خاک 2017
خالدی درویشان, عبدالواحد, روشان, سید حسین, سلیمانی, کریم, وهاب زاده, قربان,

Sand and gravel mining from the most of our country rivers causes morphological, hydrological and geomorphological changes in these rivers. This study investigates the effects of removal of sand and gravel from the river bed on sedimentological features of Zaremrood River in Mazandaran province. For this purpose, by determining four sections before and four sections after the sand removing poin...

Journal: Pollution 2019

Surface water contains a large number of pollutants, particularly human pathogens, organic toxicants and heavy metals. Due to the toxic nature of heavy metals towards marine organisms, its removal from the environment has been a growing issue. The biosorption of heavy metal ions from surface water using fish scales has emerged as an environmentally friendly technique. This study assessed the de...

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