نتایج جستجو برای: some geomorphological indices such as aspect ratioar

تعداد نتایج: 6543019  

2015
Ryo Kitagawa Makiko Mimura Akira S. Mori Akiko Sakai

In rugged terrain subject to active geomorphological processes, the species composition of forest communities changes along topographic gradients over short distances. However, the phylogenetic structure of forests on rugged terrain has rarely been examined. Understanding such structures provides insight into community assembly rules dependent on local environmental conditions. To this end, we ...

2007
Lewis A. Owen W. Dickson Cunningham Brian F. Windley

The geomorphology and structural geology ofNemegt Uul, Southern Mongolia, is examined as an example of a mountain range that has formed within a restraining bend along a major intracontinental strike-slip fault system, the Gobi-Tien Shan fault system. Structural and geomorphological analysis demonstrates that the mountain belt is young and has been differentially tilted and eroded. A geomorphol...

Journal: :Earth-Science Reviews 2021

Ants are abundant in most of the world's terrestrial environments. They energetic, strong for their size, numerous, and socially cooperative. play many geomorphologically important roles. In particular, they construct mounds subterranean galleries, create patterned ground, a role bioturbation, affect vegetation cover soil properties (such as infiltration rate) influence runoff erosion. also rol...

The purpose of this study was to identify evidence of late Quaternary glaciers in the northern highlands of Binalood. Topographic maps, satellite imagery and climatic data are the tools and data used in this study. Arc gis 10.4 software was used for data analysis. Quaternary glacier evidences were identified based on four types of evidences including morphic indices, climatic evidences, geomorp...

Determination of factors affecting on species distribution and diversity, especially in desert areas is the most important factor in rangeland ecosystems management for encountering biological stress. In order to evaluate the effect of physiographic factors on plant biodiversity in natural ecosystems of Kakhk Gonabad, this research was conducted in spring 2014. First, by overlaying four maps of...

2002
Ričardas Zitikis

A number of indices of economic inequality have been proposed in the literature. Their constructions are based on various econometric motives and justifications such as axioms of fairness. In this paper we analize the indices stepping slightly aside from their econometric meanings and adopting a mathematical approach that treats the indices as distances – in some functional spaces – between the...

2016
Larissa A. Naylor Tom Spencer Stuart N. Lane Stephen E. Darby Francis J. Magilligan Mark G. Macklin Iris Möller

The increasing frequency and/or severity of extreme climate events are becoming increasingly apparent over multidecadal timescales at the global scale, albeit with relatively low scientific confidence. At the regional scale, scientific confidence in the future trends of extreme event likelihood is stronger, although the trends are spatially variable. Confidence in these extreme climate risks is...

Journal: :تحقیقات جغرافیایی 0
مجتبی یمانی دانشگاه تهران حمید کامرانی دلیر دانشگاه تهران سجاد باقری دانشگاه تهران

â â â  chele basin is located in zagros mountains and the border between kermanshah and ilam. seems young geomorphological landforms in the region, are as a result of quaternary neotectonic activities . the purpose of this study is assessment of young morphotectonic movements influence on landform evolution in the chele basin øŒ and comparing the result with the tentative indices and geomorphic...

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