نتایج جستجو برای: tds and ec therefore

تعداد نتایج: 16835441  

ژورنال: مدیریت بیابان 2019

کل مواد جامد محلول در آب (TDS, mg/L) نشان دهندة مقدار وجود املاح در آن است و معمولاً محاسبة آن با اندازه­گیری هدایت الکتریکی آب (ECw, µS/cm) و ضرب آن در عدد تجربی 64/0 انجام می­شود. این ضریب کلی است و مقدار آن بسته به نوع نمک­های محلول در آب متغیر است. در واقع دستگاه­های اندازه­گیری TDS با اندازه­گیری EC محلول و ضریب تبدیل پیش فرض یا انتخابی توسط کاربر، مقدار TDS را نشان می­دهند. از ا...

Journal: Pollution 2017

One of the main aims of water resource planners and managers is to estimate and predict the parameters of groundwater quality so that they can make managerial decisions. In this regard, there have many models developed, proposing better management in order to maintain water quality. Most of these models require input parameters that are either hardly available or time-consuming and expensive to...

2017
M. Talaeipour J. Nouri A. H. Hassani A. H. Mahvi

BACKGROUND As an appropriate tool, membrane process is used for desalination of brackish water, in the production of drinking water. The present study aims to investigate desalination processes of brackish water of Qom Province in Iran. METHODS This study was carried out at the central laboratory of Water and Wastewater Company of the studied area. To this aim, membrane processes, including n...

Journal: :American Journal of Analytical Chemistry 2021

Effects of wastewater discharge on the coastal area in Gaza strip Palestine are not fully investigated. This study investigated effect physical and chemical properties marine water over a period 2 year. Sea sediment samples were collected from about 20 different sites. The sediments wastewater/sea mixing zone at depth 0, 2.5 5 m column direct discharging pipe line location similarly other locat...

Journal: :محیط زیست طبیعی 0
محمدرضا حاجی هاشمی جزی دانش آموخته کارشناسی ارشد بیابانزدایی، دانشکده منابع طبیعی، دانشگاه تهران، ایران مجید آتشگاهی دانشجوی کارشناسی ارشد محیط زیست، دانشکده منابع طبیعی، دانشگاه تهران، ایران امیرحسین حمیدیان استادیار دانشکده منابع طبیعی، دانشگاه تهران، ایران

nowadays, much attention has been paid on using geostatistical methods for estimation of spatial parameters, either using the variables of these parameters (kriging) or auxiliary variables (cokriging), in water and soil sciences. the quality of ground water for agriculture is very important; however, it is expensive and time consuming to measure parameters such as sar, na, ca, th, tds and ec. t...

Journal: :Environmental monitoring and assessment 2009
S B Hulyal B B Kaliwal

The present investigation deals with limnobiotic status of the Almatti reservoir from February, 2003 to January, 2005. The study revealed that there exists a fluctuations of the physical factors viz., rainfall, humidity, air and water temperature, pH and electrical conductivity (EC), and chemical factors viz., dissolved oxygen (DO), free carbon dioxide, total alkalinity, total hardness, calcium...

Journal: :Water 2022

Water contamination is indeed a worldwide problem that threatens public health, environmental protection, and agricultural productivity. The distinctive attributes of machine learning (ML)-based modelling can provide in-depth understanding into increasing water quality challenges. This study presents the development multi-expression programming (MEP) based predictive model for parameters, i.e.,...

2014
T. Sibanda V. N. Chigor S. Koba C. L. Obi A. I. Okoh

The physicochemical qualities of a typical rural-based river were assessed over a 12-month period from August 2010 to July 2011 spanning the spring, summer, autumn and winter seasons. Water samples were collected from six sampling sites along Tyume River and analysed for total nitrogen, orthophosphate, biochemical oxygen demand (BOD), temperature, pH, dissolved oxygen (DO), electrical conductiv...

ژورنال: علوم آب و خاک 2019

The aim of this study was the effect of raw water quality on the efficiency of domestic reverse osmosis apparatus in Khuzestan province. The results showed that the purified water quality was related to the quality of entrance raw water. With increasing in salt concentrations (EC) or TDS, purification efficiency was decreased. The cation and anions content of refinery water was related to TDS a...

2008
K. PARIMALA GANDHI

Due to pressure of human activity, urbanization and industrialization, the ground water sources are degraded gradually; therefore pure, safe, healthy and odorless drinking water is a matter in deep concern. There are many pollutants in ground water due to sewage viz., organic and inorganic pollutants, heavy metals, pesticides, fluoride etc; the purpose was to ascertain the quality of water from...

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