نتایج جستجو برای: geomorphic landforms

تعداد نتایج: 3815  

2017
G. Richard Whittecar Derek W. Ryter

The west slope of the Blue Ridge mountains in central Virginia is a polygenetic landscape containing interglacial and periglacial features. This paper proposes a general model relating the distribution and origin of hillslope and toeslope Quaternary landforms to climatically influenced geomorphic processes. Two generations of interglacial debris fans in the study area differ in their degree of ...

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...

2017
Scott R. Abella

Geomorphology is a dominant factor influencing vegetation distribution in the southern Appalachians, and quantifying landform characteristics is increasingly important for forest ecosystem classification. This study used slope gradient and two previously published geomorphic indices, terrain shape index and landform index that quantify landform shape and protection, to develop a field-based lan...

2012

Resourcesat-1 LISS-IV Mx satellite imagery was used for detailed geomorphological and hydrogeological study of Karawan watershed. For morphometric analysis, ASTER data was used for preparing digital elevation model and GIS was used in evaluation of linear, areal and relief aspects of morphometric parameters. Watershed boundary, flow accumulation, flow direction, stream ordering; and contour, sl...

2017
J. A. Ballesteros Cánovas M. Stoffel J. F. Martín-Duque C. Corona A. Lucía J. M. Bodoque D. R. Montgomery

Badlands and gullied areas are among those geomorphic environments with the highest erosion rates worldwide. Nevertheless, records of their evolution and their relations with anthropogenic land transformation are scarcer. Here we combine historical data with aerial photographs and tree-ring records to reconstruct the evolution of a badland in a Mediterranean environment of Central Spain. Histor...

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...

2007
Jonathan D. Phillips

The “perfect storm” metaphor describes the improbable coincidence of several different forces or factors to produce an unusual outcome. The perfect landscape is conceptualized as a result of the combined, interacting effects of multiple environmental controls and forcings to produce an outcome that is highly improbable, in the sense of the likelihood of duplication at any other place or time. G...

Journal: :آب و خاک 0
صالح سنجری محمد فرپور مصطفی کریمیان اقبال عیسی اسفندیار‎پور بروجنی

abstract geomorphology and soil genesis and its development are closely related. besides, soil-landscape studies provide a better understanding of soil forming processes. the objectives of the present research include soil genesis studies, micromorphology and clay mineralogy of soils related to geomorphic surfaces in jiroft area. soil temperature and moisture regimes of the area are hyperthermi...

Journal: :آب و خاک 0
محمد قاسم زاده گنجه ای علیرضا کریمی کارویه علی زین الدینی رضا خراسانی

introduction: playa is one of the most important landscapes in arid regions which covers about 1% of the world's total land area. study of playas is important from different points of view especially pedology, sedimentology, mineralogy, environmental geology, groundwater and surface water chemistry. more than 60 playas have been identified in iran. considering the fact that playas and surroundi...

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