Sediment Distribution Pattern Studies for Thandava and Konam Reservoirs in Visakhapatnam District

2018 ◽  
pp. 65-76
Author(s):  
J. Rangaiah ◽  
P. Udaya Bhaskar ◽  
V. Mallikarjuna
Keyword(s):  
Distribution Pattern ◽  
Sediment Distribution ◽  
Visakhapatnam District

Sediment Distribution Pattern in Lake Urmia

2020 ◽  
Author(s):  
H. A. K. Lahijani ◽  
S. Rostamabadi ◽  
A. Naderi Beni ◽  
M. Shirzade ◽  
M. Barin
Keyword(s):  
Distribution Pattern ◽  
Lake Urmia ◽  
Sediment Distribution

Sediment distribution pattern in some Iranian dams based on a new empirical reservoir shape function

2011 ◽  
Vol 27 (3) ◽  
pp. 245-255 ◽  
Author(s):  
Mohammad Reza Rahmanian ◽  
Mohammad Ali Banihashemi
Keyword(s):  
Distribution Pattern ◽  
Shape Function ◽  
Sediment Distribution

scholarly journals Makran continental margin sedimentation during the Late Holocene

2019 ◽  
Vol 56 (6) ◽  
pp. 629-636
Author(s):  
H.A.K. Lahijani ◽  
S. Amjadi ◽  
M. Pourkerman ◽  
A. Naderi ◽  
M. Hosseindoost ◽  
...  
Keyword(s):  
Distribution Pattern ◽  
Organic Materials ◽  
High Energy ◽  
Sediment Supply ◽  
Coarse Grained ◽  
Carbonate Sediments ◽  
Sediment Distribution ◽  
The Holocene ◽  
Gulf Of Oman ◽  
Upper Slope

Sedimentation in the Makran active margin is governed by a complex interaction of atmospheric, tectonics, and hydrodynamic setting of the northern flank of the Gulf of Oman. The mixed clastic carbonate sediments in the tectonically and hydrodynamically active environment have complicated the distribution pattern. The region is suffering from basic sedimentological data, and specifically, the sedimentation history of the Holocene deposits has been rarely studied in the Iranian coast. To deal with this deficiency, surface and core sediment samples from the Iranian continental shelf and upper slope of the Gulf of Oman have been studied using standard sedimentological techniques. The overall sediment distribution pattern demonstrates that the grain size gradually decreases from the shoreline to the deeper zones. However, some medium- to coarse-grained sand patches can be found in the deeper parts, especially in the middle part of the studied area that can be related to sediment supply of ephemeral rivers discharging into the sea in rainy seasons and (or) high-energy events (i.e., turbidites and tsunamis during the Holocene). Several horizons of the coarse-grained detrital sediments are detectable in the upper slope sediment cores. The coarse-grained materials are received from the hinterland during flash floods and could be accumulated due to mass wasting events. The elevated amount of organic materials in the upper slope indicates a deficit of dissolved oxygen that leads to preservation of organic materials in the bottom sediments.

Sediment distribution pattern of the South Caspian Sea: possible hydroclimatic implications

2019 ◽  
Vol 56 (6) ◽  
pp. 637-653 ◽  
Author(s):  
H.A.K. Lahijani ◽  
H. Abbasian ◽  
A. Naderi Beni ◽  
S.A.G. Leroy ◽  
S. Haghani ◽  
...  
Keyword(s):  
Distribution Pattern ◽  
Caspian Sea ◽  
Tectonic Setting ◽  
Climatic Conditions ◽  
Chemical Components ◽  
Carbonate Content ◽  
The South ◽  
The Caspian Sea ◽  
Catchment Basin ◽  
Sediment Distribution

The south Caspian subbasin extends from the foot of the Alborz Mountains to the deepest part of Caspian Sea. The lithological background and tectonic setting of the study area primarily control the deposition of thick sedimentary sequences of the basin, while hydroclimatic processes exert secondary impacts on the sediment distribution pattern. To evaluate past hydroclimatic changes, short sediment cores were retrieved from the continental shelf and upper slope of the south Caspian Sea and were treated for basic sedimentological properties and mineralogy. The results show that the sediments are composed of terrigenous, biogenic, and chemical components. The chemical component has a significant signature in the internal structure of the sediment, which reflects degradation of organic material due to a succession of aerobic and anaerobic conditions. Aerobic conditions reflect the extreme climatic conditions that lead to formation of well-oxygenated deep water in lowstands and extremely cold winters, when dense oxygenated water is allowed to touch the bottom sediments. The sediment distribution pattern demonstrates three distinctive areas in the southern continental margin with different organic matter and carbonate content. Fluvial inputs and wave hydrodynamics control the sediment properties and their distribution pattern in the upper shelf, while in deeper parts, the dynamics of water stratification and its temporal and long-term variations, relating to climate and water level changes, determine sediment composition. Overall, the sedimentary distribution pattern is a result of their sources in the catchment basin and the hydroclimate of the Caspian Sea.

scholarly journals Simulation Model Pattern Distribution Sediment at Ambon Bay, Indonesia

2018 ◽  
Vol 203 ◽  
pp. 01009 ◽  
Author(s):  
Mukhsan Putra Hatta ◽  
Muhammad Arsyad Thaha ◽  
Marthen P Lakatua
Keyword(s):  
Distribution Pattern ◽  
Suspended Sediment ◽  
Current Velocity ◽  
Suspended Sediment Concentration ◽  
Research Result ◽  
Movement Pattern ◽  
Sediment Concentration ◽  
Sediment Distribution ◽  
Velocity Effect ◽  
Current Movement

The sedimentation occurring in the outer Ambon bay as a result of the effluent from Way Ruhu river causes the reduction the mouth of the outer Ambon Bay, so that it influences the current movement pattern and sediment distribution. This research aimed at analyzing the current movement pattern and sediment distribution pattern in the outer Ambon bay using two scenarios: with the reclamation and without reclamation. The research used the numerical model of MIKE 21DHI with modules of the hydrodynamic and mud transport. The research result indicates that the simulation current velocity with the absence of reclamation ranged from 0.0-0.4 m/s, while with the presence of the reclamation, the current velocity is slightly higher that is between 0.0 - 0.6 m/s the various velocity patterns. The sediment distribution pattern in the outer Ambon bay as the result of the effluent from the way Ruhu river follows the current movement. If the conditions leading to the tide and the highest tide, the sediment going out from way Ruhu river is pushed into the bay and vice versa, when the condition leading to the recede and lowest recede, the sediment concentration is pulled out from the bay. The suspended sediment concentration is between 0.002 kg/m3 - 0.030 kg/m3 with the various patterns. The suspended sediment concentration to the condition without reclamation is more collecting if compared with the suspended sediment concentration by the presence of the distributing reclamation because of current velocity effect.

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