نتایج جستجو برای: sedimentation processes

تعداد نتایج: 544719  

2007
Slavica MATIJEVIĆ Grozdan KUŠPILIĆ Zorana KLJAKOVIĆ-GAŠPIĆ

Sediment redox potentials (EH) at stations of different trophic status in the central Adriatic from 2001-2007 were investigated in this paper. For most part of the year at open sea and channel stations EH values were mainly positive (+150 to 0 mV), even to 10 cm sediment depth. Positive EH (absence of sulphate reduction with very low sulphide concentrations) at these stations is probably caused...

2006
Julien Charreau Stuart Gilder Yan Chen Stéphane Dominguez Jean-Philippe Avouac Sevket Sen Marc Jolivet Yongan Li Weiming Wang

We report a magnetostratigraphic and rock magnetic study of the Yaha section, located on the southern flank of the central Tian Shan mountains, Asia. Our results show a twofold increase in sedimentation rate as well as marked changes in rock magnetic characteristics ca. 11 Ma. After 11 Ma, sedimentation rate remained remarkably constant until at least 5.2 Ma. These findings are consistent with ...

2012
Raj Mohan Singh

The observation of peak flows into river or stream system is not straight forward but complex function of hydrology and geology. Accurate suspended sediment prediction in rivers is an integral component of sustainable water resources and environmental systems modeling. Agricultural fields’ fertility decays, rivers capacity decreases and reservoirs are filled due to sedimentation. The observatio...

2003
Peter Molnar

Accumulation rates of terrestrial sediment have increased in the past few million years both on and adjacent to continents, although not everywhere. Apparently, erosion has increased in elevated terrain regardless of when last tectonically active or what the present-day climate. In many regions, sediment coarsened abruptly in late Pliocene time. Sparser data suggest increased sedimentation rate...

2006
Christopher W. Fuller Sean D. Willett Mark T. Brandon

Recent observations of an association between forearc basins and slip during subduction thrust earthquakes suggest a link between processes controlling upper plate structure and seismic coupling on the subduction-zone thrust fault. We present a mechanism for the formation of these basins where sedimentation occurs on landward-dipping segments of the subduction wedge, which itself is actively gr...

2013
Preetam Choudhary Joyanto Routh Govind J. Chakrapani

Sediment variables total organic carbon (TOC), total nitrogen (TN), total sulfur (TS), as well as their accumulation rates and atomic ratios (C/N and C/S), were studied along with stable isotopes (δ 13 C, δ 15 N, and δ 34 S), and specific biomarkers (n-alkanes and pigments) in a 35-cm-long sediment core from Lake Bhimtal, NW India. The average sedimentation rate is 3.6 mm yr -1 , and the core r...

2017
Afshin Ebrahimi Mokhtar Mahdavi Meghdad Pirsaheb Fariborz Alimohammadi Amir Hossein Mahvi

The dataset presented in this article are related to the research article entitled "Hybrid coagulation-UF processes for spent filter backwash water treatment: a comparison studies for PAFCl and FeCl3 as a pre-treatment" (Ebrahimi et al., 2017) [1]. This article reports the cost estimation for treating produced spent filter backwash water (SFBW) during water treatment in Isfahan- Iran by various...

Journal: :Trends in Sciences 2022

Consisting of semi-circular body, coastal region in the Banten Bay holds a significant role for both marine ecosystem and human activities. The change its coastline due to erosion/sedimentation process may affect economic purposes. This study aims figure out evidence changes using remote sensing numerical model. recording satellite data from Landsat 5 TM, 7 ETM+ 8 OLI during 1990 - 2019, are em...

Journal: :IOP conference series 2022

Abstract Morphological changes of Talakar’s coastline covering three administrative subdistrict has been modelled numerically in terms sedimentation build up. Shoreline is one the dynamic processes as parts natural for to reach their subsequent equilibrium resulting bathimetrical alteration coastal bed. Sedimentation modeling simulation conducted coastlines North Galesong, and South Galesong su...

2012
Marlene Wall Gertraud Maria Schmidt Pornpan Janjang Somkiat Khokiattiwong Claudio Richter

The Andaman Sea and other macrotidal semi-enclosed tropical seas feature large amplitude internal waves (LAIW). Although LAIW induce strong fluctuations i.e. of temperature, pH, and nutrients, their influence on reef development is so far unknown. A better-known source of disturbance is the monsoon affecting corals due to turbulent mixing and sedimentation. Because in the Andaman Sea both, LAIW...

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