نتایج جستجو برای: a worldwide typical landform for aeolian erosion
تعداد نتایج: 16100361 فیلتر نتایج به سال:
Wind erosion is one of the environmental problems worldwide, particularly in arid and semi-arid areas of Iran. Different methods and models have been proposed to measure and monitor wind erosion in the recent years. One of the accurate models for measuring f wind erosion is the USEPA model. The purpose of this study was to evaluate the quantification of wind erosion with the USEPA model and the...
“any science seeks generalities; the aim is to transcend knowledge of particular cases by discovering general regularities or laws” (chesterman, 2001, p. 1). these were the words of chesterman whose paper has served as a typical example of numerous papers carried out on ‘translation universals’ since the mid-nineties. blum-kulka (1986) is among translation studies scholars who proposed ‘explici...
this study intends to investigate samuel beckett’s waiting for godot and endgame under the lacanian psychoanalysis. it begins by explaining the most important concepts of lacanian psychoanalysis. the beckettian characters are studied regarding their state of unconscious, and not the state of consciousness as is common in most beckett studies. according to lacan, language plays the sole role in ...
Estimating accurately dust emission flux during aeolian erosion events is crucial for quantifying the amount of in atmosphere. The rare existing field experiments such were mainly performed using flux-gradient (FG) method. Here, we present first intercomparison size-resolved fluxes estimated by both FG and eddy-covariance (EC) methods several events. Both applied simultaneously WIND-O-V (WIND e...
In the small fraction of Earth's surface with highest erosion rates such as Alps and Himalayas quantifying incision, rock uplift inferring climatic controls on landscape can be relatively straightforward once ages river terraces cut in bedrock (strath terraces) are constrained. However, many mid to lower relief settings that more typical mountain belts worldwide, periods net incision riverbed l...
Aeolian sandstones are found intimately associated with Late Neoproterozoic ‘snowball Earth’ glacial deposits. Studying the nature of these aeolian deposits offers the great potential to elicit new and important information regarding the wind conditions during these extreme glacial intervals. Wind direction is the dominant paleoclimatic indicator that can be derived from aeolian deposits and on...
abstract in first part of this project, the use of a new and biguanid-like catalyst supported on silica as a recyclable catalyst provides a new route for the synthesis of a variety of arylalkylidene rhodanine derivatives through knoevenagle reaction in at present of solvent at room temperature. rhodanine derivatives and especially arylalkylidene rhodanines have proven to be attractive compound...
Topography fundamentally influences the distribution and morphology of aeolian landforms via modification surface wind flow creation space for sediment deposition. This has been observed at both landform (individual topographic dune forms) macro-landscape (sand sea) scales. Although previous studies have considered several aspects impact topography on landforms, patterns landscape-scale accumul...
Previous studies suggest that rodent burrows, a proxy for rodent population are important for predicting plague risk areas. However, studies that link landform, surface attributes and rodent burrows in the Western Usambara Mountains in Tanzania are scanty. Therefore, this study was conducted in plague endemic area of the Western Usambara Mountains in northern, Tanzania, to explore the relations...
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