نتایج جستجو برای: slope of lands

تعداد نتایج: 21167091  

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During the construction of road networks large area of forests and rangelands will be destroyed in the road path and its margins. This process causes massive amount of soil and rock move from its site and on adjacent lands will be accumulated, that causes increasing environmental degradation. One of the most important problems due to forest roads making is increasing of different erosion forms ...

جوری, محمد حسن, زارع, محمد, سالاریان, تینا, عسکری زاده, دیانا, فخرقاضی, مونا,

Watersheds are changed positively or negatively as biotic and abiotic factors in natural circumstances impact them. Landslides, as a physical factor, one of the negative consequences on these catchments. Masoleh watershed, in North of Iran, is one of the susceptible areas to explode the natural landslides. In other to landslide hazard zonation, the Dempster-Shafer model is which is used has 14 ...

2016
William Headlee William Landon Headlee Philip M. Dixon Steven E. Jungst Kenneth J. Moore

Hybrid poplars have demonstrated high productivity as short rotation woody crops (SRWCs) in the U.S. Midwest, and the hybrid aspen ‘Crandon’ (Populus alba L. × P. grandidenta Michx.) has exhibited particularly promising yields across topographic positions (including sloping marginal lands) in Iowa. However, a key obstacle for landowner acceptance of SRWCs is the lack of economic returns early i...

M. Heydari S. Allahyaribeik

The process of erosion and desertification affects social communities, agricultural lands and natural resources in coastal areas. The rapid coastline changes would cause social and economic issues in the coastal areas. In this study, Miankaleh coasts and the eastern coastlines of Amirabad port have been surveyed due to existing benchmarks since June 2013 until December 2015 in order to analyze ...

2012
D. Richard Cameron Brian S. Cohen Scott A. Morrison

The rapid pace of climate change poses a major threat to biodiversity. Utility-scale renewable energy development (>1 MW capacity) is a key strategy to reduce greenhouse gas emissions, but development of those facilities also can have adverse effects on biodiversity. Here, we examine the synergy between renewable energy generation goals and those for biodiversity conservation in the 13 M ha Moj...

Background and objective: Landslide susceptibility zoning using different methods is one of the landslide management strategies. The purpose of this study is to evaluate the landslides susceptibility in the Bar watershed in Khorasan Razavi province using the support vector machine (SVM) algorithm. Method: First, the landslide layer of the area was corrected through field visits and Google Earth...

جلالیان, حمید, حاصلی, محمد,

The best path to development is the primary focus on the potentials and threats of the environment and accordingly efficient use of the land. In this regard, it has a closely relation between agricultural and rural development and natural resources. The type of land use is a main factor in soil erosion and sediment production in the watersheds. In this research, it has been studied and evaluate...

1987
L. F. ABBOTT

The energy versus time of arrival pattem of neutrinos from SN1987A is sensitive to a neutrino mass, m~, of order a few eV. To disentangle constraints on m~ from the data, a theory of supernova emission is necessary. We recall the present status of this theory and approximate its predictions in two diffusion models: one designed to reflect the present supernova lore, the other devised to pessimi...

Journal: :تولید گیاهان زراعی 0
نیلوفر نصرالهی دانشگاه علوم کشاورزی گرگان حسین کاظمی هیات علمی بهنام کامکار هیات علمی

in this research, geographical information system (gis) and analytical hierarchy process (ahp) were applied to agricultural land use suitability of aq-qala township for barley cropping in rainfed condition. for this purpose, 17 environmental layers of the study area collected, and thematic maps such as slope, elevation, precipitation, average, minimum and maximum temperatures and some of micro ...

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