Influence of water and sediment supply on the long-term evolution of alluvial fans and deltas: Statistical characterization of basin-filling sedimentation patterns

2013 ◽  
Vol 118 (3) ◽  
pp. 1602-1616 ◽  
Author(s):  
Kyle M. Straub ◽  
Yinan Wang
Keyword(s):  
Long Term Evolution ◽  
Sediment Supply ◽  
Alluvial Fans ◽  
Statistical Characterization ◽  
Water And Sediment ◽  
Term Evolution ◽  
Influence Of Water

Embedding compaction processes in long-term evolution modeling of tidal marshes

2021 ◽  
Author(s):  
Riccardo Xotta ◽  
Claudia Zoccarato ◽  
Philip S. J. Minderhoud ◽  
Pietro Teatini
Keyword(s):  
Numerical Model ◽  
Marsh Surface ◽  
Long Term Evolution ◽  
Sediment Supply ◽  
Tidal Marshes ◽  
High Porosity ◽  
Fe Method ◽  
Geomechanical Properties ◽  
Term Evolution

<p>Tidal marshes are vulnerable and dynamic ecosystems with essential roles from protection against marine storms to biodiversity preservation. However, the survival of these environments is threatened by external stressors such as increasing mean sea level, reduction in sediment supply, and erosion. Tidal marshes are formed by deposition over the last centuries to millennia of sediments transported by surface water and biodegradation of organic matter derived from halophytic vegetation. Therefore, the sediment at the surface is characterized by high porosity and their large consolidation potential plays an important role in the future elevation dynamics, which is often not fully recognized.</p><p>Here we propose a novel three-dimensional numerical model to simulate the long-term dynamics of tidal marshes. A 3D groundwater flow equation in saturated conditions is implemented to compute the over-pressure dissipation with the aid of the finite element (FE) method, whereas the sediment consolidation is computed according to Terzaghi's theory.</p><p>A Lagrangian approach is implemented in the FE numerical model to properly consider the large soil deformation arising from the deposition of highly compressible material. The hydro-geomechanical properties, that depend on the intergranular effective stress, are highly non-linear.</p><p>The model takes advantage of a dynamic mesh that simulates the evolution of the landform elevation by means of an accretion/compaction mechanism: the elements deform in time as the soil consolidates and increase in number as the new sediments deposit over the marsh surface. The deposition is treated as input to the consolidation model and can vary in space and time.</p><p>The model is applied to simulate the long-term evolution of realistic tidal marshes in terms of accretion and consolidation due to the coupled dynamics of surficial and subsurface processes.</p>

Optical and mechanical characterization of evaporated SiO_2 layers Long-term evolution

1996 ◽  
Vol 35 (25) ◽  
pp. 5067 ◽  
Author(s):  
K. Scherer ◽  
L. Nouvelot ◽  
P. Lacan ◽  
R. Bosmans
Keyword(s):  
Mechanical Characterization ◽  
Long Term Evolution ◽  
Term Evolution

Link-Level Simulator for Wireless local Area Network

2018 ◽  
Vol 6 (7) ◽  
pp. 314
Author(s):  
Chaithra. H. U ◽  
Vani H.R
Keyword(s):  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area Networks ◽  
Local Area ◽  
Long Term Evolution ◽  
Wireless Local Area Networks ◽  
Area Network ◽  
Network Simulator ◽  
Term Evolution

Now a days in Wireless Local Area Networks (WLANs) used in different fields because its well-suited simulator and higher flexibility. The concept of WLAN  with  advanced 5th Generation technologies, related to a Internet-of-Thing (IOT). In this project, representing the Network Simulator (NS-2) used linked-level simulators for Wireless Local Area Networks and still utilized IEEE 802.11g/n/ac with advanced IEEE 802.11ah/af technology. Realization of the whole Wireless Local Area Networking linked-level simulators inspired by the recognized Vienna Long Term Evolution- simulators. As a outcome, this is achieved to link together that simulator to detailed performances of Wireless Local Area Networking with Long Term Evolution, operated in the similar RF bands. From the advanced 5th Generation support cellular networking, such explore is main because different coexistences scenario can arise linking wireless communicating system to the ISM and UHF bands.

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