نتایج جستجو برای: water model

تعداد نتایج: 2577200  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علم و صنعت ایران - دانشکده مهندسی عمران 1382

مسأله نفوذ شوری به بالادست مصب رودخانه هایی که تحت تأثیر جزر و مد قرار دارند از مسائل مهم مهندسی می باشد. در مدیریت مناطق ساحلی، تصمیمات مهندسی مربوط به مسائلی از قبیل اصلاح رژیم جریان و اصلاح شرایط ایجاد شده در اثر مصرف آب نیاز به تحقیقات در مورد حجم نفوذ شوری به قسمتهای بالادست رودخانه می باشد. شناخت عوامل موثر بر رژیم جریان رودخانه که اصلی ترین عامل نفوذ شوری می باشد از مسائل مهم در این امر ...

2005
YING SUN SUSAN SOLOMON AIGUO DAI ROBERT W. PORTMANN

Daily precipitation data from worldwide stations and gridded analyses and from 18 coupled global climate models are used to evaluate the models’ performance in simulating the precipitation frequency, intensity, and the number of rainy days contributing to most (i.e., 67%) of the annual precipitation total. Although the models examined here are able to simulate the land precipitation amount well...

1999
Changyi Wang

This paper describes the design of a generalised data format for storing the data of water supply and distribution systems. It uses the network model to describe the system topology and the connectivity of components. Data are stored based on an Entity-Relationship model and using a customisable format.

H. Arabi S. Haghighi,

Heavy metal pollution dispersion simulation in rivers and predicting spatial and temporal variations of pollutants can be used to determine the precise place and to schedule water withdrawal time for drinking, agriculture, aquaculture and ecosystem studies. To study the movement of heavy metal pollution through Karoon flow model, MIKE 11 was employed fpr simulation of the flow model of Karoon R...

ژورنال: علوم آب و خاک 2016
امیدوار, محسن, سپاس‌خواه, علیرضا, نیکو, محمدرضا, هنر, تورج,

At the river catchments, different strategies at the whole or different parts of the basin can be applied for water resources management. One of these strategies is optimal water allocation and crop pattern. In this study, an optimization model for water allocation and cropping pattern is presented based on the cooperative game theory. To measure the performance of the developed model, the cult...

2014
Annina Sorg Matthias Huss Mario Rohrer Markus Stoffel

Despite the fact that the fast-growing population of Central Asia strongly depends on glacial melt water for fresh water supply, irrigation and hydropower production, the impact of glacier shrinkage on water availability remains poorly understood. With an annual area loss of 0.36 to 0.76%, glaciers are retreating particularly fast in the northern Tien Shan, thus causing concern about future wat...

Journal: :iranian journal of pharmaceutical research 0
vahid panahi-azar liver and gastrointestinal diseases research center, tabriz university of medical sciences, tabriz, iran shahla soltanpour faculty of pharmacy, zanjan university of medical sciences, zanjan 45139, iran fleming martinze grupo de investigaciones farmacéutico-fisicoquímicas, departamento de farmacia, universidad nacional de colombia, a.a. 14490, bogotá d.c., colombia abolghasem jouyban faculty of pharmacy

the solubility of naproxen in binary mixtures of polyethylene glycol 200 (peg 200) + water at the temperature range from 298.0 k to 318.0 k were reported. the combinations of jouyban-acree model + van’t hoff and jouyban-acree model + partial solubility parameters were used to predict the solubility of naproxen in peg 200 + water mixtures at different temperatures. combination of jouyban-acree m...

Journal: :iranian journal of environmental technology 0
pejman roohi ph.d. student of chemical engineering, environmental engineering research center (eerc), sahand university of technology, sahand new town, tabriz, iran esmaeil fatehifar professor of chemical engineering, environmental engineering research center (eerc), sahand university of technology, sahand new town, tabriz, iran reza alizadeh associate professor of chemical engineering, environmental engineering research center (eerc), sahand university of technology, sahand new town, tabriz, iran

in this article a comparative study for modeling and optimization of 2-methylpropane-2-thiol removal from contaminated soil by ultrasound is investigated. central composite design (ccd) and artificial neural network (ann) were utilized and compared to each other in order to obtain appropriate predicting model with respect to sonication power (w), sonication time (min) and water/reactor volume r...

Journal: :journal of agricultural science and technology 0
e. kullaj department of horticulture and landscape architecture, faculty of agriculture and environment, agricultural university of tirana, tirana, albania. f. thomaj department of horticulture and landscape architecture, faculty of agriculture and environment, agricultural university of tirana, tirana, albania. j. kucera environmental measuring systems (ems), brno, czech republic

expansion of apple growing to dry areas requires reliable approaches to select genotypes tolerant to water stress. we have simulated apple tree transpiration (ec) from different commercial orchards and compared it with actual transpiration (ea) derived from sap flow measurements. the modelling approach lies in rearranging a parameterized p–m equation and incorporating in it a stomatal conductan...

Journal: :Environmental Modelling and Software 2004
Walter Boughton

The Australian water balance model (AWBM) is a catchment water balance model that calculates runoff from rainfall at daily or hourly time increments. The daily version iss used for water yield and water management studies; the hourly version is used for design flood estimation. This paper describes the origin and development of the AWBM beginning with elementary modelling components of saturati...

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