نتایج جستجو برای: dispersion models and land

تعداد نتایج: 16951237  

     Due to the important role of non-point source pollution in water resources management, in this study time series modeling was applied to forecast water quality parameters and L-THIA model (one type of non-point source pollution models) was applied to estimate water pollutants. The purpose of this study was to compare results of L-THIA model and ARIMA models in Namrood sub-basin located in ...

ژورنال: طلوع بهداشت یزد 2012
رادمنش, فریدون, سالاری, مرجان, معاضد, هادی,

  Background : Waste is a permanent part of human life. Urban development, increasing use of irresolvable materials and many other achievements of machine life have com to raise one of the main concerns of urban environmental management, that is waste disposal. Waste management in different qualities and quantities is the most important environmental problem.   Method: The aim of the current st...

2014
Martina S. Ragettli Ming-Yi Tsai Charlotte Braun-Fahrländer Audrey de Nazelle Christian Schindler Alex Ineichen Regina E. Ducret-Stich Laura Perez Nicole Probst-Hensch Nino Künzli Harish C. Phuleria

We simulated commuter routes and long-term exposure to traffic-related air pollution during commute in a representative population sample in Basel (Switzerland), and evaluated three air pollution models with different spatial resolution for estimating commute exposures to nitrogen dioxide (NO2) as a marker of long-term exposure to traffic-related air pollution. Our approach includes spatially a...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده ادبیات و علوم انسانی دکتر علی شریعتی 1389

the current study examined iranian undergraduate efl students’ willingness to communicate with regard to their vocabulary knowledge. in general, participants were somewhat willing to communicate in english. the total mean score of 730 university students’ perception of willing to communicate was 83.53 out of 135. results, regarding four parts of willingness to communicate, revealed that part...

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
سید علیرضا قدیمی دانشجوی دکتری توسعه کشاورزی دانشکده کشاورزی دانشگاه رازی کرمانشاه سید رضا اسحاقی دانشجوی کارشناسی ارشد ترویج و آموزش کشاورزی دانشگاه تهران پوریا نصرآبادی دانشجوی کارشناسی ارشد توسعه روستایی دانشگاه تهران موسی اعظمی استادیار گروه ترویج و آموزش کشاورزی، دانشکده کشاورزی دانشگاه بوعلی سینا (همدان)

non-consolidation and dispersion of agricultural lands is considered as one of the serious barriers against agricultural development. small-size farms along with their being dispersed hinders the efficient use of water, land, labor, mechanization and other factors effective in agricultural production. the main purpose followed in this article is to study the attitude of farmers towards land int...

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
مرتضی تهامی پور زرندی دانشجوی دکتری دانشکدۀ اقتصاد و توسعۀ کشاورزی، دانشگاه تهران حبیب الله سلامی استاد دانشکدۀ اقتصاد و توسعۀ کشاورزی، دانشگاه تهران سعید یزدانی استاد دانشکدۀ اقتصاد و توسعۀ کشاورزی، دانشگاه تهران امیرحسین چیذری استادیار اقتصاد کشاورزی، دانشکدۀ اقتصاد و توسعۀ کشاورزی، دانشگاه تهران

the purpose of this study is to determine spatial dependency pattern of systematic risk of dry land wheat production in iran, using spatial autoregressive models. to this end, spatial weighted contiguity matrix was constructed based on the delaunay triangularization method, and correlation coefficient among these neighbors were estimated using spatial autoregressive models. in addition, the rol...

ژورنال: سلامت و محیط زیست 2016

Background and Objective: Increasing population growth and construction of high-rise buildings have doubled the amount of environmental pollution in the cities. Moreover, people use the open urban spaces more than before in order to meet their ecological needs. Accordingly, some parameters such as various vegetation and continuous winds streams can be considerably influential in transmittance o...

2013
Gary W. Luck Andrew Carter Lisa Smallbone

Examinations of the impact of land-use change on functional diversity link changes in ecological community structure driven by land modification with the consequences for ecosystem function. Yet, most studies have been small-scale, experimental analyses and primarily focussed on plants. There is a lack of research on fauna communities and at large-scales across multiple land uses. We assessed c...

Journal: :زمین شناسی مهندسی 0
امیرهوشنگ رجایی محمد مختاری کیت پریستلی

results of velocity structure modeling in the earth's crust using a comparison approach of receiver function analysis and joint inversion of receiver functions with surface wave dispersion data are presented in this paper. seismograms of the teleseismic events that have been recorded on a broadband seismic station in the central alborz were used for data processing. velocity models that we...

Journal: :international journal of environmental research 2015
m.v. kumarasamy

prediction of spatial and temporal variation of water quality is vital for managing pollutantsdisposal into the rivers. depletion of dissolved oxygen (do) takes place due to the consumption of oxygen bymicrobes to digest bio-degradable pollutants which enter a water course. reaeration takes place in a specificrate depending on do deficit. many investigators have formulated models as an alternat...

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