Natural Environment Change
مرور بر اساس
ارسال های اخیر
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Evaluation of human thermal comfort using UTCI index: case study Khorasan Razavi, Iran
(Institute of Geography, University of Tehran, 2016-07-01)The Universal Thermal Climate Index (UTCI) addresses these shortcomings by using an advanced thermo-physiological model. The aim of this study was to investigate and prepare zoning of thermal comfort condition using UTCI. ...
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An Investigation and assessment of meteorological drought in Lake Urmia Basin using drought indices and probabilistic methods
(Institute of Geography, University of Tehran, 2016-07-01)Drought is one of the most important weather-induced phenomena which may have severe impacts on different areas such as agriculture, economy, energy production, and society. A number of drought indices have been introduced ...
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Comparative assessment between historical and future trends in the daily maximum temperature parameter over selected stations of Iran
(Institute of Geography, University of Tehran, 2016-07-01)Objective of this study is to determine whether there are significant changes in maximum temperature trends between the current (1981-2010) and future (2011-2099) periods. To this end, statistical downscaling is used to ...
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Evaluation of the effects of meteorological drought on ground water table fluctuations (Case study: Hormozgan Province, Iran)
(Institute of Geography, University of Tehran, 2016-07-01)Drought as a natural but temporary imbalance of water availability is the interaction between natural environment and human life resulting in diminished water resources availability and reduced carrying capacity of the ...
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Trend assessment of climate changes in Khuzestan Province, Iran
(Institute of Geography, University of Tehran, 2016-07-01)In this paper, according to the data of 17 weather stations in Khuzestan during 1951–2012, the trend of climate changes and its severity were evaluated. A consistent correlation was highlighted for trends of De Martonne ...
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Summer precipitation determinant factors of Iran's South-East
(Institute of Geography, University of Tehran, 2017-01-01)Indian Ocean is known as a source of moisture for southeast of Iran due to summer precipitation. In this study, in order to investigate the role of SST of Indian Ocean, and the convergence and divergence fields in the ...
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An estimation of Thornthwaite monthly water-balance in Mighan sub-basin
(Institute of Geography, University of Tehran, 2017-01-01)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 ...
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The sand dunes migration patterns in Mesr Erg region using satellite imagery analysis and wind data
(Institute of Geography, University of Tehran, 2017-01-01)Understanding the situation, behavior and the nature of sand dunes and also their location, transport and deposition are very important. On the other hand, the importance of sand dunes is due to the impacts that they have ...
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A synoptic-climatology approach to increase the skill of numerical weather predictions over Iran
(Institute of Geography, University of Tehran, 2017-01-01)Simplifications used in regional climate models decrease the accuracy of the regional climate models. To overcome this deficiency, usually a statistical technique of MOS is used to improve the skill of gridded outputs of ...
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Spatiotemporal analysis of carbon dixoid impact on seasonal rainfall oscillation in Iran
(Institute of Geography, University of Tehran, 2016-01-01)Climate change disturbs the distribution of precipitation patterns and affects water resources. A lot of evidences imply that the increased atmospheric concentration of greenhouse gasses in turn increases the precipitation ...
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Spatial distribution of absorbing centers of population with seismic structure in Kerman City
(Institute of Geography, University of Tehran, 2016-01-01)Iran is located in an area with high earthquake risk. There are over 20 active faults with length of 500 km and also densely populated parts of the country have been rendered vulnerable to strong earthquakes. However, ...
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Assessing spatiotemporal variability of drought trend in Iran using RDI index
(Institute of Geography, University of Tehran, 2016-01-01)Drought is one of the natural phenomena which occurs in all climates in different parts of the world. Iran is located in the dry belt of the world. The increase of desertification, drought reoccurrence, and destruction by ...
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Sustainable management of Kiyan forest reserve-Iran: An analysis of hierarchal process
(Institute of Geography, University of Tehran, 2016-01-01)Management of natural ecosystems, like forests, has several objectives such as wood production, sustainability of ecological systems, preserving aestheti,c and cultural or psychological satisfaction. This management is ...
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Estimation of the relative active tectonics in Shahriary basin (Central Iran) using geomorphic and seismicity indices
(Institute of Geography, University of Tehran, 2015-07-01)Iran is well known for having countless historical and instrumental records of tectonic events. Shahriary catchment, as a study area, is part of the Zagros collision seismic province. This research aimed to introduce a new ...
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Impacts of climate change on extreme precipitation events in arid (Bandar Abbas) and semi-arid (Shahrekord) stations in Iran
(Institute of Geography, University of Tehran, 2015-07-01)The aim of this paper is to project extreme precipitation events in an arid and a semiarid station. In order to project climate change based on general circulation models (GCMs), we have applied LARS-WG[1] downscaling tool. ...
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Remote sensing application in evaluation of soil characteristics in desert areas
(Institute of Geography, University of Tehran, 2016-01-01)Soil is one of the most important natural resources covering a large area of the land surface. Soil plays a vital role in biosphere processes, such as energy balance, hydrology, biochemistry, and biological productivity. ...
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Spatial-temporal analysis of heat waves in Iran over the last three decades
(Institute of Geography, University of Tehran, 2016-01-01)The purpose of this research is to analyze heat waves characteristics in the warm period of the year as a climatic hazard in Iran. In this study, the daily maximum temperature is taken at 44 synoptic stations during the ...
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Comparison and evaluation of three methods of multi attribute decision making methods in choosing the best plant species for environmental management (Case study: Chah Jam Erg)
(Institute of Geography, University of Tehran, 2015-07-01)Today, environmental crisis and loss of natural resources are the principle causes of the creation of environmental management systems. The optimal management of natural resources requires the assessment and classification ...
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Assessing landscape change of Minab delta morphs before and after dam construction
(Institute of Geography, University of Tehran, 2015-07-01)As special depositional environments which are adjacent to the seas, deltas have provided a field for human habitat establishment. Geomorphic features of deltas are in constant transformation due to their dynamic features. ...
