نتایج جستجو برای: narrow rivers
تعداد نتایج: 75801 فیلتر نتایج به سال:
[1] The role of channel width and slope adjustments to differential uplift in rivers within actively deforming terrains remains contentious. Here high-resolution topographic surveying of formerly antecedent outwash channels demonstrates marked changes in channel width as a primary response to differential uplift. For five Late Quaternary alluvial paleochannels crossing small folds along the act...
[1] Field work and topography analysis show that remnant, local areas of a low-relief landscape or erosion surfaces are geographically continuous across the southeastern Tibetan Plateau margin. We correlate these remnant surfaces as a paleolandscape that formed at low elevation. Remnants of this paleolandscape are preserved because incision of the fluvial system has been largely limited to majo...
Spatial niche partitioning in dinosaurs from the latest cretaceous (Maastrichtian) of North America.
We examine patterns of occurrence of associated dinosaur specimens (n = 343) from the North American Upper Cretaceous Hell Creek Formation and equivalent beds, by comparing their relative abundance in sandstone and mudstone. Ceratopsians preferentially occur in mudstone, whereas hadrosaurs and the small ornithopod Thescelosaurus show a strong association with sandstone. By contrast, the giant c...
Largely, Turkey is a hilly and mountainous country. Many rivers rise from the mountains and flow into the seas surrounding the country. Mean while along fertile plains around the rivers and coastal floodplains of Turkey were densely populated than the other parts of the country. These characteristics show that there is a significant relationship between river basins and population or settlement...
[1] Damage from flooding in the winter and fall seasons has been widespread in the United Kingdom (UK) and Western Europe over recent decades. Here we show that winter flood events in the UK are connected to Atmospheric Rivers (ARs), narrow ribbons along which a large flux of moisture is transported from the subtropics to the mid-latitudes. Combining river flow records with rainfall measurement...
Trinidad and Tobago is plagued with a perennial flooding problem. The higher levels of rainfall in the wet season often lead to extensive flooding in the low-lying areas of the country. This has lead to significant damage to livestock, agricultural produce, homes and businesses particularly in the Caparo River Basin. Clearly, there is a need for developing flood mitigation and management strate...
1. Compared with rivers in more humid, forested ecoregions of eastern and midwestern U.S.A., rivers in semi-arid grassland of the U.S. Great Plains tend to be relatively shallow, more variable in discharge, and characterised by high suspended sediment loads. Although critical life stages of fish in prairie rivers probably depend at least partially on zooplanktonic food, data on community and di...
Abstract The assessment of river ecosystem health is crucial for improving resilience, achieving ecological protection and rational utilization in the Yangtze Estuary region where there high rivers a demand quality by Shanghai, world's largest modern city. To assess status rivers, this study established model consisting five dimensions: water quality, landscape, aquatic organisms, hydrology, hu...
اثربخشی آموزش مهارت های دهلیزی بر عملکرد مهارت های حل مسئله دانش آموزان دبستانی دختر با مشکلات ریاضی
هدف:اثربخشی آموزش مهارت های دهلیزی بر عملکرد مهارت های حل مسئله دانش آموزان دختر با مشکلات ریاضیاست.روش: روش پژوهش از نوع شبه آزمایشی ودر این تحقیق عبارتست از کلیه دانش آموزان دختر7-8 ساله منطقه 14 شهر تهران در در طی 3 ماهه اول سال 1392که به دلیل مشکلات ریاضی که تعداد آنها 24نفر (12 نفر دختر دارای مشکلات ریاضی، 12 نفر گروه کنترل) بودند. نمونه گیری به روش هدفمند و از طریق تست کی مت(اختلال ریاضی...
The Neotropical Ambrysus stali La Rivers species complex is reviewed and includes A. bifidus La Rivers & Nieser, A. scolius La Rivers, A. stali La Rivers, and A. tricuspis La Rivers. Ambrysus oblongulus Montandon is removed as a member of this complex. Features uniting these species are related to male genitalia and associated structures. Ambrysus maya n. sp. is the fifth species in the complex...
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