scholarly journals Drainage Area, Bedrock Fracture Spacing, and Weathering Controls on Landscape‐Scale Patterns in Surface Sediment Grain Size

2020 ◽  
Vol 125 (10) ◽  
Author(s):  
Alexander B. Neely ◽  
Roman A. DiBiase
Keyword(s):  
Grain Size ◽  
Surface Sediment ◽  
Landscape Scale ◽  
Drainage Area ◽  
Sediment Grain Size ◽  
Fracture Spacing

Spatial heterogeneity of surface sediment grain size and aeolian activity in the gobi desert region of northwest China

CATENA ◽  
2020 ◽  
Vol 188 ◽  
pp. 104469 ◽  
Author(s):  
Yaping Shen ◽  
Chunlai Zhang ◽  
Rende Wang ◽  
Xuesong Wang ◽  
Songbo Cen ◽  
...  
Keyword(s):  
Grain Size ◽  
Spatial Heterogeneity ◽  
Surface Sediment ◽  
Northwest China ◽  
Gobi Desert ◽  
Sediment Grain Size ◽  
Desert Region ◽  
Aeolian Activity

scholarly journals Surface sediment grain-size distribution and sediment transport in the subaqueous Mekong Delta, Vietnam

2017 ◽  
Vol 39 (3) ◽  
Author(s):  
Nguyen Trung Thanh ◽  
Karl Stattegger ◽  
Daniel Unverricht ◽  
Charles Nittrouer ◽  
Phung Van Phach ◽  
...  
Keyword(s):  
Grain Size ◽  
Sediment Transport ◽  
Size Distribution ◽  
Grain Size Distribution ◽  
Surface Sediment ◽  
Mekong Delta ◽  
Sediment Grain Size

scholarly journals Morphological and sedimentological response of a mixed-energy barrier island tidal inlet to storm and fair-weather conditions

2013 ◽  
Vol 1 (1) ◽  
pp. 745-782 ◽  
Author(s):  
G. Herrling ◽  
C. Winter
Keyword(s):  
Grain Size ◽  
Sediment Transport ◽  
Surface Sediment ◽  
Weather Conditions ◽  
Tidal Inlet ◽  
Size Distributions ◽  
Fair Weather ◽  
Sediment Grain Size ◽  
Grain Size Distributions ◽  
Ebb Tidal Delta

Abstract. The environment of ebb-tidal deltas between barrier island systems is characterized by a complex morphology with ebb- and flood-dominated channels, shoals and swash bars connecting the ebb-tidal delta platform to the adjacent island. These morphological features reveal characteristic surface sediment grain-size distributions and are subject to a continuous adaptation to the prevailing hydrodynamic forces. The mixed-energy tidal inlet Otzumer Balje between the East Frisian barrier islands Langeoog and Spiekeroog in the southern North Sea has been chosen here as an exemplary study area for the identification of relevant hydrodynamic drivers of morphology and sedimentology. We compare the effect of high-energy wave-dominated storm conditions to mid-term tide-dominated fair-weather conditions on tidal inlet morphology and sedimentology with a process-based numerical model. A multi-fractional approach with five graduated grain-size fractions between 150 and 450 microns allows the simulation of corresponding surface sediment grain-size distributions. Net sediment fluxes for distinct conditions are identified: during storm conditions, bed load sediment transport is generally onshore directed on the shallower ebb-tidal delta shoals whereas fine-grained suspended sediment bypasses the tidal inlet by wave-driven currents. During fair-weather the sediment transport mainly focuses on the inlet throat and the marginal flood channels. We show how the observed sediment grain-size distribution and the morphological response at mixed-energy tidal inlets are the result of both, wave-dominant less frequent storm conditions and mid-term tide-dominant fair-weather conditions.

scholarly journals Morphological and sedimentological response of a mixed-energy barrier island tidal inlet to storm and fair-weather conditions

2014 ◽  
Vol 2 (1) ◽  
pp. 363-382 ◽  
Author(s):  
G. Herrling ◽  
C. Winter
Keyword(s):  
Grain Size ◽  
Sediment Transport ◽  
Surface Sediment ◽  
Weather Conditions ◽  
Tidal Inlet ◽  
Size Distributions ◽  
Fair Weather ◽  
Sediment Grain Size ◽  
Grain Size Distributions ◽  
Ebb Tidal Delta

Abstract. The environment of ebb-tidal deltas between barrier island systems is characterized by a complex morphology with ebb- and flood-dominated channels, shoals and swash bars connecting the ebb-tidal delta platform to the adjacent island. These morphological features reveal characteristic surface sediment grain-size distributions and are subject to a continuous adaptation to the prevailing hydrodynamic forces. The mixed-energy tidal inlet Otzumer Balje between the East Frisian barrier islands of Langeoog and Spiekeroog in the southern North Sea has been chosen here as a model study area for the identification of relevant hydrodynamic drivers of morphology and sedimentology. We compare the effect of high-energy, wave-dominated storm conditions to mid-term, tide-dominated fair-weather conditions on tidal inlet morphology and sedimentology with a process-based numerical model. A multi-fractional approach with five grain-size fractions between 150 and 450 μm allows for the simulation of corresponding surface sediment grain-size distributions. Net sediment fluxes for distinct conditions are identified: during storm conditions, bed load sediment transport is generally onshore directed on the shallower ebb-tidal delta shoals, whereas fine-grained suspended sediment bypasses the tidal inlet by wave-driven currents. During fair weather the sediment transport mainly focuses on the inlet throat and the marginal flood channels. We show how the observed sediment grain-size distribution and the morphological response at mixed-energy tidal inlets are the result of both wave-dominated less frequent storm conditions and mid-term, tide-dominant fair-weather conditions.

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