نتایج جستجو برای: yaounde municipal lake

تعداد نتایج: 67661  

2000
Jing Lou David J. Schwab Dmitry Beletsky Ann Arbor Nathan Hawley

A quasi-three-dimensional suspended sediment transport model was developed and generalized to include combined wave-current effects to study bottom sediment resuspension and transport in southern Lake Michigan. The results from a threedimensional circulation model and a wind wave model were used as input to the sediment transport model. Two effects of nonlinear wave-current interactions were co...

Journal: :Environmental science & technology 2004
Erin M Snyder Shane A Snyder Kevin L Kelly Timothy S Gross Daniel L Villeneuve Scott D Fitzgerald Sergio A Villalobos John P Giesy

The Las Vegas Wash (LW) delivers tertiary-treated municipal wastewater effluent, nonpotable shallow groundwater seepage, and runoff from the urbanized Las Vegas Valley to Las Vegas Bay (LX) of Lake Mead. To investigate the potential for contaminants in LW influent to produce effects indicative of endocrine disruption in vivo, adult male and female common carp (Cyprinus carpio) were exposed in c...

2014
Hasan Karadag Özgür Fırat Özge Fırat

Adiyaman city, which is located in the north of the Ataturk Dam Lake, has no wastewater purification facilities which results in municipal, agricultural, and industrial wastewater discharges directly entering the reservoir. To assess the pollution in the dam lake, we used several oxidative stress biomarkers in blood tissue of Cyprinus carpio. Fish samples were taken from Sitilce, polluted area ...

2004
N. L. Rose J. F. Boyle Y. Du C. Yi X. Dai P. G. Appleby H. Bennion S. Cai L. Yu

As part of a study using lake sediments to determine the extent and causes of human impacts to lakes along an east–west transect following the Yangtse River, sediment cores were taken from Taihu in eastern China. Previous studies have focussed on the impacts of direct inputs of pollutants from municipal and industrial wastewater but little work has been undertaken on trends in atmospheric depos...

2011
Isaac W. S. Wong William G. Booty Phil Fong Sarah Hall

The Lake Winnipeg Basin Initiative was created as part of Canada’s Action Plan on clean water. Its focus is to deal with excessive lake inputs of nutrients from surface runoff and municipal wastewater. Understanding the dynamics of nutrient loading, the associated algal blooms and resulting changes in fish populations, beach closures, and ecosystem imbalance requires access to various sources o...

The Mighan playa/lake is characterized as a closed catchment. In the recent years, the rapid industrialization and urbanization has resulted in a pollution area in the city of Arak. In this work, we focus on six regions around the playa/lake to study the distribution of heavy metals in the waters and their contamination risk. A total of 32 water samples are analyzed to determine the conta...

1994
A. Aghamohammadi

1 Institute for Studies in Theoretical Physics and Mathematics, P.O.Box 5746, Tehran 19395, Iran. 2 Department of Physics, Alzahra University, Tehran 19834, Iran 3 Department of Physics, Sharif University of Technology, P.O.Box 9161, Tehran 11365, Iran. 4 Department of Physics, Tehran University, North-Kargar Ave. Tehran, Iran. 5 Institute for Advanced Studies in Basic Sciences, P.O.Box 159, Ga...

2007
Shigeki Masunaga Takeo Sakurai Isamu Ogura Junko Nakanishi

Introduction A number of severe soil and air pollution cases around municipal and industrial waste incinerators have recently been found in Japan. It is tme that the amount of waste incinerated in Japan is very high compared with other countries; however, it must be clarified whether the incinerators are the sole cause ofthe present dioxin pollution problem. In this study, the mass balance of d...

2014
Maurice Demanou Régis Pouillot Marc Grandadam Pascal Boisier Basile Kamgang Jean Pierre Hervé Christophe Rogier Dominique Rousset Christophe Paupy

BACKGROUND Dengue is not well documented in Africa. In Cameroon, data are scarce, but dengue infection has been confirmed in humans. We conducted a study to document risk factors associated with anti-dengue virus Immunoglobulin G seropositivity in humans in three major towns in Cameroon. METHODOLOGY/PRINCIPAL FINDINGS A cross sectional survey was conducted in Douala, Garoua and Yaounde, using...

2015
Getahun E. Agga Terrance M. Arthur Lisa M. Durso Dayna M. Harhay John W. Schmidt Zhi Zhou

This study compared the populations of antimicrobial-resistant bacteria and the repertoire of antimicrobial resistance genes in four environments: effluent of three municipal wastewater treatment facilities, three cattle feedlot runoff catchment ponds, three swine waste lagoons, and two "low impact" environments (an urban lake and a relict prairie). Multiple liquid and solid samples were collec...

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