نتایج جستجو برای: fluvial

تعداد نتایج: 4448  

Journal: :The Geographical Journal 1903

Journal: :The Sedimentary record 2023

The fluvial sedimentary record is largely composed of deposits from relatively common flow events, rather than more catastrophic scour-and-fill events. At the scales bedforms, such are preserved within stratigraphic because they rapidly accumulate within, and protected by, morphodynamic topographic depressions that occur naturally in system as a result feedbacks between flow, sediment transport...

2014
Christian Michel Simon Herzog Christian de Capitani Patricia Burkhardt-Holm Constanze Pietsch

Worldwide increases in fluvial fine sediment are a threat to aquatic animal health. Fluvial fine sediment is always a mixture of particles whose mineralogical composition differs depending on the sediment source and catchment area geology. Nonetheless, whether particle impact in aquatic organisms differs between mineral species remains to be investigated. This study applied an in vitro approach...

2008
J. M. Kusimi

The Densu River Basin has come under serious threat from a number of human activities such as farming, lumbering, sand winning, animal grazing, dam construction among others. These activities have significant implications on the fluvial processes of the river such as erosion, braiding and flooding. The study examined the current fluvial processes and landforms and the dynamics in the river morp...

2010
D. E. WALLING J. C. WOODWARD D. E. Walling J. C. Woodward

The alluvial flood plains of lowland Britain contain thick sequences of fine-grained sediment that result from the deposition of suspended sediment during flood events. These environments constitute important storage zones for a wide range of sediment-associated nutrients and con­ taminants and many of the geochemical properties of the deposited sediment are strongly related to particle size. R...

2007
Bruce L. Rhoads

The analysis o f earth surface systems is complicated by mutual adjustments among geomorphic variables. Most statistical models used by geomorphologists implicit ly assumeunidirectional causation. Simultaneousequation models represent an alternative statistical approach by which mutual adjustment mechanisms can be analyzed explicitly. This technique is used t o develop a processresponse model o...

2005
Boyko Dodov Efi Foufoula-Georgiou

[1] This paper explores the links between channel/floodplain morphometry, streamflow variability, and sediment transport across a wide range of scales and frequencies of discharge. On the basis of extensive analysis of observations from a climatologically and geologically homogeneous region in the midwestern United States, we provide evidence that streamflow statistics are significantly affecte...

2014
Alberto G. Fairén Chris R. Stokes Neil S. Davies Dirk Schulze-Makuch Alexis P. Rodríguez Alfonso F. Davila Esther R. Uceda James M. Dohm Victor R. Baker Stephen M. Clifford Christopher P. McKay Steven W. Squyres

Gale crater is a 154-km-diameter impact crater formed during the Late Noachian/Early Hesperian at the dichotomy boundary on Mars. Here we describe potential evidence for ancient glacial, periglacial and fluvial (including glacio-fluvial) activity within Gale crater, and the former presence of ground ice and lakes. Our interpretations are derived from morphological observations using high-resolu...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید