نتایج جستجو برای: loess
تعداد نتایج: 3659 فیلتر نتایج به سال:
Loess-paleosol sequences are the most intensively studied terrestrial archives used for reconstruction of Late Pleistocene environmental and climatic changes in Azov Sea region, southwest Russia. Here we present a refined chronostratigraphy multiproxy record dynamics complete representative loess–paleosol (Beglitsa Chumbur-Kosa sections) from region. We propose new following Chinese Danubean lo...
Railway track-bed materials are mostly in unsaturated state, and their hydro-mechanical properties depend strongly on their water contents or suctions. In France, problematic soils such as collapsible loess and swelling marl can be origin of instability problems for new lines for high speed trains, while the hydro-mechanical behaviour of interlayer soil formed mainly by interpenetration of ball...
Magnetic susceptibility measurements play a key role in Quaternary studies. proxies, such as low field and frequency-dependent magnetic susceptibility, are widely applied the reconstruction of terrestrial paleoclimate, e.g., study loess-paleosol successions. In general, interpretation loess signals is based on two commonly accepted models: pedogenic enhancement wind-vigour models. However, ther...
Loess landslides represent an important geohazard in relation to the deformation of unstable loess structures occurred on slope loess-covered area. It has become one topics accurately identify distribution and activity describe spatio-temporal kinematics western-project construction China. Interferometric synthetic aperture radar (InSAR) proves be effective for investigation. This study propose...
In the field of statistical discrimination k-nearest neighbor classification is a well-known, easy and successful method. In this paper we present an extended version of this technique, where the distances of the nearest neighbors can be taken into account. In this sense there is a close connection to LOESS, a local regression technique. In addition we show possibilities to use nearest neighbor...
Intensive research on China’s Western Loess Plateau has located 63 Palaeolithic deposits, which together allow the authors to present a general model of hominin occupation from 80 000 to 18 000 years ago. Tools, subsistence and settlement correlate nicely with the climate: the warm wet MIS3 seeing expansion and more organised acquisition of quartz, and the Late Glacial Maximum that followed, a ...
Extended abstract Introduction Piping erosion is one of the common water erosions usually occurs in soil with low infiltration and soluble minerals that finally changes landscape. Different factors control its occurrence and development. To predict piping occurrence/hazard through modeling, effective factors should be prioritized and considered as inputs of the model. The present study...
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