نتایج جستجو برای: indicators of water quality

تعداد نتایج: 21263288  

Journal: :Marine pollution bulletin 2005
Andrew Moss Jon Brodie Miles Furnas

The Australian and New Zealand Guidelines for Fresh and Marine Water Quality (ANZECC Guidelines) provide default national guideline values for a wide range of indicators of relevance to the protection of the ecological condition of natural waters. However, the ANZECC Guidelines also place a strong emphasis on the need to develop more locally relevant guidelines. Using a structured framework, th...

Journal: :Epidemiology 2013
Benjamin F Arnold Kenneth C Schiff John F Griffith Joshua S Gruber Vincent Yau Catherine C Wright Timothy J Wade Susan Burns Jacqueline M Hayes Charles McGee Mark Gold Yiping Cao Stephen B Weisberg John M Colford

BACKGROUND Studies of health risks associated with recreational water exposure require investigators to make choices about water quality indicator averaging techniques, exposure definitions, follow-up periods, and model specifications; however, investigators seldom describe the impact of these choices on reported results. Our objectives are to report illness risk from swimming at a marine beach...

Abdolkazem Neisi Ahmad Bnadeei Nejad, Masoumeh Alidosti Zeinab Ghaed Rahmat, Zeynab Baboli,

Background and aims: The main cause of many problems in developing countries is related to the provision of safe drinking water. Since the health of drinking water is important in the busy centers such as hospitals, clinics and health centers, this study was done to investigate the role of water coolers connected to the municipal system in microbial quality of drinking water in...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده ادبیات و زبانهای خارجی 1392

abstract while task-based instruction is considered as the most effective way to learn a language in the related literature, it is oversimplified on various grounds. different variables may affect how students are engaged with not only the language but also with the task itself. the present study was conducted to investigate language and task related engagement on the basis of the task typolog...

2014
Yaojun Bo Qingke Zhu Weijun Zhao

This study was aimed to identify optimal indicators for microtopography-oriented soil quality assessment. Twenty-two soil physicochemical and biological parameters were investigated at 93 sampling points in five different microtopographic units in semiarid regions of the Loess Plateau, where the principal functions of eroded agriculture soils are related to productivity and anti-erosion ability...

Journal: :Journal of AOAC International 2003
Mary L Tortorello

Indicator organisms have been used for nearly a century to assess the microbiological status of water and foods. Beginning with their use in water sanitation programs, their applications have been extended over the years to other products, and they have become important components of the microbiological testing programs of both industry and regulatory agencies. Functionally, they may be viewed ...

2007
P. Cau

Quantifying the impact of land use on water supply and quality is a primary focus of environmental management. In this work we apply a semidistributed hydrological model (SWAT) to predict the impact of different land management practices on water and agricultural chemical yield for a study site situated in the Arborea region of central Sardinia, 5 Italy. The physical processes associated with w...

Background: Iran is located in the global arid zone. With an average rainfall of less than 250 mm. 25 percent is Iran of located in hyper-dry area and 40 percent in the arid area. In 2007, the World Bank report declared the annual reduction of freshwater resources in Iran 6 times more than global standards and indicators. Since at present, in Iran most available fresh water enters the water eco...

Journal: :Marine pollution bulletin 2012
Chris Carroll David Waters Suzanne Vardy David M Silburn Steve Attard Peter J Thorburn Aaron M Davis Neil Halpin Michael Schmidt Bruce Wilson Andrew Clark

Targets for improvements in water quality entering the Great Barrier Reef (GBR) have been set through the Reef Water Quality Protection Plan (Reef Plan). To measure and report on progress towards the targets set a program has been established that combines monitoring and modelling at paddock through to catchment and reef scales; the Paddock to Reef Integrated Monitoring, Modelling and Reporting...

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