نتایج جستجو برای: water utility

تعداد نتایج: 686556  

Due to the fact that in recent years, Iran has faced severe fluctuations and shocks from macroeconomic variables, the household utility has changed. Undoubtedly, without studying and researching the effects of these shocks on household utility, appropriate solutions cannot be provided to reduce its adverse consequences. Therefore, in the first stage, this study has extracted the household utili...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی 1392

flow in natural river bends is a complex and turbulent phenomenon which affects the scour and sedimentations and causes an irregular bed topography on the bed. for the reason, the flow hydralics and the parameters which affect the flow to be studied and understand. in this study the effect of bed and wall roughness using the software fluent discussed in a sharp 90-degree flume bend with 40.3cm ...

2015
Pan Ji Jeffrey Parks Marc A. Edwards Amy Pruden A. Mark Ibekwe

A unique microbiome establishes in the portion of the potable water distribution system within homes and other buildings (i.e., building plumbing). To examine its composition and the factors that shape it, standardized cold water plumbing rigs were deployed at the treatment plant and in the distribution system of five water utilities across the U.S. Three pipe materials (copper with lead solder...

Journal: :Environmental science & technology 2008
E A Pappas C Huang

To protect human health, atrazine concentrations in finished municipal drinking water must not exceed a maximum contaminant level (MCL) of 3 microg/L, as determined by a specific monitoring regime mandated by the United States Environmental Protection Agency. Atrazine levels were monitored along tile-fed drainage ditches draining to a major drinking water source and used to predict MCL exceedan...

2006

A number of studies exist in relation to monitoring/regulation of complex forms of water operations management contracts, particularly leases and concessions. The latter are implemented, more rationally, in operating environments where perceived market entry risks have been adequately mitigated prior to actual implementation of reforms. In these cases, it is possible to implement incentive acti...

Journal: :Journal of experimental botany 2014
Jonathan P Lynch Joseph G Chimungu Kathleen M Brown

Several root anatomical phenes affect water acquisition from drying soil, and may therefore have utility in breeding more drought-tolerant crops. Anatomical phenes that reduce the metabolic cost of the root cortex ('cortical burden') improve soil exploration and therefore water acquisition from drying soil. The best evidence for this is for root cortical aerenchyma; cortical cell file number an...

Journal: :The Science of the total environment 2014
D I Jalba N J Cromar S J T Pollard J W Charrois R Bradshaw S E Hrudey

The role that deficient institutional relationships have played in aggravating drinking water incidents over the last 30 years has been identified in several inquiries of high profile drinking water safety events, peer-reviewed articles and media reports. These indicate that collaboration between water utilities and public health agencies (PHAs) during normal operations, and in emergencies, nee...

2000
J. Brudenell Geoff A. Sandy

Yarra Valley Water, a corporatised water utility achieved the significant efficiencies that are promised from the move towards privatisation. At the same time it substantially improved the quality of service delivery to its customers. It demonstrated that substantial benefits can be achieved with a minimal investment through leveraging existing information systems. The use of enterprise modelli...

ژورنال: علوم آب و خاک 2010
زیبایی, منصور , محسن پور , رباب ,

Drought is among the most costly weather-related events and Iran is highly vulnerable to the economic, social and environmental impacts of drought In this study expected profit maximization model and utility efficient programming were applied to determine optimal crop pattern, expected gross margin and water use with and without, drought condition at representative farms of homogenous groups. T...

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