نتایج جستجو برای: elevation classes 0028
تعداد نتایج: 226756 فیلتر نتایج به سال:
Comparability analyses are performed to investigate similarities/differences of the standard precipitation index (SPI) and the reconnaissance drought index (RDI), respectively, utilizing precipitation and ratio of precipitation over potential evapotranspiration (ET0). Data are from six synoptic stations in south Khorasan province in Iran.At the first for calculating SPI, the elevation-precipita...
soil salinity has been a large problem in arid and semi arid regions. preparation of such maps is useful for natural resource managers. old methods of preparing such maps require a lot of time and cost. multi-spectral remotely sensed dates due to the broad vision and repeating of these imageries is suitable for provide saline soil maps. this investigation is conducted to provide saline soil map...
environmental impact assessment (ela) today is a planning tool that is used for the prediction of environmental impacts. there are several methods to assess environmental impacts in the world and iran as well. among them system analysis approach using degradation model (makhdoum, 1996) has shown it's effectiveness. degradation model is used at different levels including the basin , catchme...
In recent years, fundamental changes in the ecosystems of Zagros forest structure have occurred, including the decline of brant’s oak (Quercus bratii Lindl.) that is main species in this region. So this research intends to study trees decline in relation to sylviculture, topography, and soil characteristics. For this purpose, first, parts of forest that showed oak decline were identified by fie...
To achieve sustainable development as well as the conservation of natural ecosystems and their biodiversity, it is necessary to study ecological foctors and their impacts on plant species diversity. The Khorramabad-Andimeshk highway was selected in the current study to investigate the diversity of the family Brassicaceae. The length of this highway is 100 km and its height ranged from 420 to 17...
Objective: The aim of this study is to provide a management plan for the Sykan watershed of Darre shahr city located in Ilam province using GIS in land use planning. Methods: For land using of Sykan watershed of Ilam province with about 9 hectares area, map of classes, elevation, percent slope, geographical aspects, soil characteristics, vegetation density and the final map units were combined ...
Forests areas of Iran in comparison with the world is very low and this low area is in demolition threat always. Hence, the remainder of these forests should be managed based on ecological capability evaluation. With regard to importance of subject, ecological capability for forestry in the Sharui watershed, Khuzestan province, was evaluated in 2015. For this purpose, the Makhdoom model and AHP...
We employ the Ising model from statistical physics in the problem of spatial data classification. We use a multipleclass discretization of the sample values. The proposed algorithm predicts the class identity at unmeasured points based on Monte Carlo simulations that are conditional on the observed data (sample). The algorithm aims to minimize the deviation between the normalized correlation en...
Neurology John C. Morris and David A. Balota Semantic dementia versus Alzheimer’s disease: A matter of semantics? This information is current as of December 11, 2007 http://www.neurology.org/cgi/content/full/57/2/173 located on the World Wide Web at: The online version of this article, along with updated information and services, is All rights reserved. Print ISSN: 0028-3878. Online ISSN: 1526-...
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