نتایج جستجو برای: wells and qanats significantly increased. moreover

تعداد نتایج: 16876949  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند - دانشکده کشاورزی 1390

abstract this study is carried out to determine the chemical composition in the three vegetative stages of the haloxylon sp., degradation parameters, with adding naoh and ca(oh2 ). for this purpose, in may and october and january 2010 enough some haloxylon sp. of the ammary area was prepared. crude protein and ash percentage are decrease, neutral detergent fiber percentage with pragress stage ...

ژورنال: سلامت و محیط زیست 2019

Background and Objective: Scaling and corrosion both are destructive to materials (usually metals) in water supply systems. A dataset (from 2002 to 2013) of groundwater resources (including springs, qanats, deep wells and semi-deep wells) were examined for water tendency to corrosion or scaling in rural regions of Kashan, a city in Isfahan, central Iran. Materials and Methods: Water quality pa...

Journal: :تحقیقات آب و خاک ایران 0
بابک ابراهیمی دانشجوی دکتری، دانشکده جغرافیا، دانشگاه اصفهان حمید یوسفیان کارشناس ارشد سازه، شرکت آب منطقه ای اصفهان مهرداد پسندی استادیار، دانشکده علوم، دانشگاه اصفهان

underground dams have recently been considered as hydrological structures for the development of water resources, especially in the dry regions of iran. in this investigation along with the basic studies and the aquifer flow modeling, the probable hydrogeological effects of an underground dam are investigated. the proposed place for the ganjeh underground dam is chehel-khaneh aquifer located in...

Journal: :تحقیقات آب و خاک ایران 0
فریبرز عباسی استاد مؤسسة تحقیقات فنی و مهندسی کشاورزی رضا بهراملو استادیار مؤسسة تحقیقات فنی و مهندسی کشاورزی اردلان ذوالفقاران مربی پژوهشی مؤسسة تحقیقات فنی و مهندسی کشاورزی نادر نادری مربی پژوهشی مؤسسة تحقیقات فنی و مهندسی کشاورزی

in this study, technical and operational issues of 45 qanats in hamadan, semnan and khorasan razavi provinces were studied and executive strategies to improve water management in qanats were recommended. 15 qanats were selected and studied in each of the provinces. discharge, quantity and quality of qanat water, geometric characteristics including longitudinal slope, length, and flow section ar...

Aims & Backgrounds: The faults and tectonic structures have a major impact on groundwater resources and they play more important role in these factors, which by creating a displacement in the sequence of layers, lead to creation of aquifers. Determination of the relationship between faults and groundwater resources can help to identify new water resources.The aim of this study is to investigate...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم انسانی 1390

supervisors play an undeniable role in training teachers, before starting their professional experience by preparing them, at the initial years of their teaching by checking their work within the proper framework, and later on during their teaching by assessing their progress. but surprisingly, exploring their attributes, professional demands, and qualifications has remained a neglected theme i...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده کشاورزی و منابع طبیعی 1392

the aim of the present study was to determine the in?uence of presence or absence of corpus luteum (cl) on hormonal and metabolites composition of follicular ?uid (ff) harvested from different sized follicles and its relationship with blood serum concentrations in sanjabi ewes. ovaries and blood samples were collected from 60 clinically healthy adult ewes (sanjabi breed) 1–3 years of age in dio...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده منابع طبیعی 1391

in this study, the effects of oleothermal modification on physical and mechanical peroperties of fir wood (abeis sp.) blocks were examined. at first, some blocks of fir wood with 5 × 20 × 120 cm dimensions were prepared. the blocks were treated in soybean oil. the effects of 3 factors such as treatments temperature (180and 200 °c), holding time (12 and 15 h) and initial moisture content of wood...

Journal: :نشریه دانشکده فنی 0
هرمز پازوش

in dry parts of asia and africa where the rain was sparse and the surface water inadequate, man has had to search for-other sources of water namely ground water. through this need he learned to tap ground water and extract it to the surface. thus qanats were developed in persia.techniques of qanat construction were later introduced by persians to parts of asia and dry lands of africa.constructi...

kh. Ausati Kh. Ebrahimi M. Jannat rostami S. Feiznia

Assessing the quality of groundwater is important to ensure the sustainablesafe use of these resources. However, describing the overall water quality condition isdifficult due to the spatial variability of multiple contaminants and the wide range ofindicators (chemical, physical and biological) that could be measured. Therefore, in thiscase study, some water quality parameters including Na, Mg,...

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