نتایج جستجو برای: water and water

تعداد نتایج: 16930158  

2004
Hubert Chanson

Measurements of air–water flow properties are reasonably simple in steady flows, but not so in unsteady flows. Some studies investigated periodic flows in which instantaneous data were averaged over several cycles. During the present work, new unsteady air–water flow measurements were performed in sudden open channel flow surges. Unsteady air–water flow measurements were performed in the wave f...

Mohammad Mosaferi, Mojtaba Pourakbar, Saeed Lak,

Background: Continuous expansion of potable water pollution sources is one of the main concerns of water suppliers, therefore measures such as water safety plan (WSP), have been taken into account to control these sources of pollution. The aim of this study was to identify probable risks and threatening hazards to drinking water quality in Lighvan village along with assessment of bank filtratio...

2010
Antoine Van de Voorde Ghassan Chebbo

Currently rainwater harvesting is more and more popular in the world. The aim is reduce drinking water consumption in developed countries or create a point of access for water in developing countries, for drinking water or for plants irrigation. For developed countries the problems of rainwater re-use can be linked with micro pollutants contamination. Hence we underline a possible source of bio...

2015
Jana Schwarz Miet Maertens Ashok K. Chapagain

International agri-food trade has expanded rapidly during the past decades and changed considerably in structure with important implications, especially for developing economies. One of the main environmental concerns regarding international trade is the exploitation and redistribution of water resources. In this paper, we use the virtual water approach for analyzing the relationship between gl...

Journal: :iranian journal of environmental sciences 0
ali rnjbar jafarabadi department of environment science, faculty of natural resources and marine sciences, tarbiat modares university of tehran, iran maliheh masoodi department of environment science, gorgan university of agricultural and natural resource, iran maryam sharifiniya department of fishery science, gilan university, iran alireza riyahi bakhtiyari department of environmental sciences, faculty of natural resources and marine sciences, tarbiat modares university, noor, mazandaran, iran

evaluation of surface water quality is a complex process undertakingmultiple parameters. converting great amount of parameters into a simpler expressionand enabling easy interpretation of data are the main purposes of water quality indices.the main aim of this study is to plan effective water resources management system forkarun river by combination of ccmewqi and geographic information system ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علم و صنعت ایران 1377

دیواره آبی غشایی به عنوان سطح جاذب حرارت ، برای تولید بخار، در اکثر دیگهای بخار لوله- آب ، مورد استفاده قرار می گیرد. این دیواره، باید در شرایط مختلف بهره برداری، بسیار قابل اطمینان و ایمن باشد. در رساله حاضر، تغییرات درجه حرارت ، توزیع دما و نحوهء انتقال حرارت هدایتی، در داخل جدارهء دیواره آبی دیگهای بخار لوله-آب ، مورد بررسی قرار گرفته است . شناخت رفتار حرارتی فلز و انتخاب نوع آن و نیز آگاهی ...

Journal: :iranian journal of public health 0
marzieh farhadkhani 1. dept. of environmental health engineering, school of health, isfahan university of medical sciences , isfahan, iran. mahnaz nikaeen 1. dept. of environmental health engineering, school of health, isfahan university of medical sciences , isfahan, iran. behrouz akbari adergani 2. water safety research center, food and drug organization, ministry of health and medical education , tehran, iran. maryam hatamzadeh 1. dept. of environmental health engineering, school of health, isfahan university of medical sciences , isfahan, iran. bibi fatemeh nabavi 1. dept. of environmental health engineering, school of health, isfahan university of medical sciences , isfahan, iran. akbar hassanzadeh 3. dept. of statistics and epidemiology, school of health, isfahan university of medical sciences , isfahan, iran.

drinking water quality can be deteriorated by microbial and toxic chemicals during transport, storage and handling before using by the consumer. this study was conducted to evaluate the microbial and physicochemical quality of drinking water from bottled water coolers.a total of 64 water samples, over a 5-month period in 2012-2013, were collected from free standing bottled water coolers and wat...

Non-native aquatic species can be introduced in new areas through emptying of the ballast tanks, with a high impact on health, economy and environment. This is considered by the International Maritime Organization (IMO): (i) in 2004, the IMO adopted the International Convention for the Control and Management of Ships' Ballast Water and Sediments (BMW Convention) in orde...

Journal: :health scope 0
mohammad ali zazouli department of environmental health engineering, health sciences research center, faculty of health, mazandaran university of medical sciences, sari, ir iran edris bazrafshan health promotion research center, zahedan university of medical sciences, zahedan, ir iran; health promotion research center, zahedan university of medical sciences, zahedan, ir iran. tel: +98-5413425829, fax: +98-5412420014

2009
Patrice Koehl Henri Orland Marc Delarue

We present an extension to the Poisson-Boltzmann model in which the solvent is modeled as an assembly of self-orienting dipoles of variable densities. Interactions between these dipoles are included implicitly using a Yukawa potential field. This model leads to a set of equations whose solutions give the dipole densities; we use the latter to study the organization of water around biomolecules....

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