نتایج جستجو برای: arid climate condition by using of drainable lysimeter

تعداد نتایج: 21907268  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده منابع طبیعی و علوم دریایی 1388

this research was conducted in two protect and destroy region in the middle zagros, in illam province. in order to identification of ecological species group and evaluate density of regeneration, effect of many factors such as protection, vegetation, physiographic factors, physical and chemical properties of soil in study locations were studied. to achieve these purpose number of 54 plots using...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس 1389

in the past couple of decades sociocultural theory of sla and its implications in efl contexts have attracted attentions of research circles worldwide and aroused some controversies. firth and wagner (1997) have questioned the principles of the cognitive view which gives importance to mental constructs in favor of sociocultural view which highlights social and contextual constructs. but if soci...

2017
Ajoke R. Onojeghuo Heiko Balzter Paul S. Monks

The annual cycles of soil moisture and NO2 have been analysed across the climate zones of West Africa using two satellite data sets (OMI on AURA and ASCAT on MetOp-A). Exploring the sources and sinks for NO2 it is clear that the densely populated urban cities including Lagos and Abuja had the highest mean NO2 concentrations (>1.8 × 10 15 molecules cm -2 ) indicative of the anthropogenic urban e...

City and human are two different human-made and natural systems which has an effect on each other. The formation of a residence depends on the climatic conditions. Construction of a residence shows that people have adapted themselves and their activities to it; while the climatic conditions play an important role in comfort in human environments. Thus, the buildings and environmental spaces sho...

Journal: :اکو هیدرولوژی 0
رستا نظری کارشناس‏ارشد رشتۀ آبیاری و زهکشی، گروه مهندسی آب دانشگاه بین‏المللی امام خمینی(ره) عباس کاویانی استادیار گروه مهندسی آب دانشگاه بین‏المللی امام خمینی(ره)

iran was located in the arid belt and desert region of the world. this climatic situation was presented in several parts of iran such as qazvin. evapotranspiration is one the most important parameter which was effect on agricultural development. there are different methods for estimating this item which selected by climatic conditions. this research concentrates to evaluate 28 empirical and com...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان 1389

wireless sensor networks (wsns) are one of the most interesting consequences of innovations in different areas of technology including wireless and mobile communications, networking, and sensor design. these networks are considered as a class of wireless networks which are constructed by a set of sensors. a large number of applications have been proposed for wsns. besides having numerous applic...

1998
Jaume Porta

This paper reviews the main methodologies and techniques that have been used to characterize gypsum in soils, especially in gypsiferous soils of semiarid and arid regions and range from the identification of gypsum in soil surveys in the field to the study of gypsum in the laboratory. Many methods of gypsum identification and determination have been developed, each one with its own limitations....

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده ریاضی 1389

one of the most important number sequences in mathematics is fibonacci sequence. fibonacci sequence except for mathematics is applied to other branches of science such as physics and arts. in fact, between anesthetics and this sequence there exists a wonderful relation. fibonacci sequence has an importance characteristic which is the golden number. in this thesis, the golden number is observed ...

Water resources in arid and semi-arid regions are heavily influenced by climate change, water shortage, water regulations, and increased water demands. Monthly discharge is one of the most important factors in hydrological studies. Some of the basins are not equipped with adequate hydrometric equipment. In such a case, average monthly discharge could be estimated by regional monthly water balan...

Journal: :مدیریت آب و آبیاری 0
ایمان کریمی راد دانشجوی دکتری مهندسی منابع آب، دانشگاه تهران کیومرث ابراهیمی دانشیار گروه مهندسی آبیاری و آبادانی، دانشگاه تهران شهاب عراقی نژاد دانشیار گروه مهندسی آبیاری و آبادانی، دانشگاه تهران

in many arid and semi-arid regions, groundwater resources exploitation is inevitable to meet water demands. this paper aims to study the response of phreatic and confined aquifers in a multilayer groundwater system to climate variability. to achieve this aim, gorgan plain multilayer aquifer has been investigated using different meteorological and hydrological drought indices (di, pni, spi and g...

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