نتایج جستجو برای: erosion surface

تعداد نتایج: 660965  

2004
Alexander E. Lobkovsky Arshad Kudrolli Daniel H. Rothman

[1] We study channelization and slope destabilization driven by subsurface (groundwater) flow in a laboratory experiment. The pressure of the water entering the sand pile from below as well as the slope of the sand pile are varied. We present quantitative understanding of the three modes of sediment mobilization in this experiment: surface erosion, fluidization, and slumping. The onset of erosi...

2002
X. C. Zhang

these advantages will not be fully recognized unless the spatial and temporal predictability of process-based Spatially averaged soil erosion data provide little information on models are validated. Thus, spatially distributed erosion soil erosion dynamics. Dynamically varied, spatially distributed erosion data are needed to better understand erosion processes and data are of great importance i...

ژورنال: آبخیزداری ایران 2023

The present study has evaluated the efficiency of GARP model in forecasting the probability of gully erosion occurrence in Abgendi basin, Kohgiluye & Boyerahmad province. After field visits, 81 gullies were recorded by GPS and surveying camera, then the map of gully erosion distribution was prepared in ArcGIS environment. Variables of elevation, slope, slope direction, distance to road, distanc...

2013
G. S. Wilson R. H. Levy G. Browne N. Dunbar R. Cody F. Florindo S. Henrys ANDRILL McMurdo

Chronostratigraphic data available for the preliminary age model for the upper 700 m for the AND-1B drill core include diatom biostratigraphy, magnetostratigraphy, 40Ar/39Ar ages on volcanic material, 87Sr/86Sr ages on calcareous fossil material, and surfaces of erosion identifi ed from physical appearance and facies relationships recognised in the AND-1B drill core. The available age data allo...

Journal: :international journal of environmental research 2014
a.l. ananthapadmanabha r. shankar k. sandeep

in this study we report the rock magnetic properties of surface soil samples and their spatialvariability from the northernmost district of kerala to understand pedogenic processes and soil erosion. themagnetic signal is mainly from fine grained pedogenic magnetite as other sources like anthropogenic andlithogenic magnetite, bacterial magnetite and greigite are absent. the surface soil samples ...

Journal: :Caries research 2010
Hao Yu T Attin A Wiegand W Buchalla

The objective of this in vitro study was to investigate the effect of different fluoride solutions on enamel erosion. Human enamel specimens were pretreated with 1 of 10 different fluoride solutions (n = 20): TiF(4), NaF, AmF, ZnF(2), or SnF(2), each at native pH (pH range: 1.2-7.8) or buffered pH (pH = 4). The control group samples received no fluoride pretreatment. All samples were then erode...

2012
Tomoyuki Kashima Hideo Akiyama Fumihide Miura Shoji Kishi

Rebamipide is an antiulcer agent used to treat gastric ulcer and gastritis. Biological effects of rebamipide include cytoprotection, wound healing, and anti-inflammatory properties that are known to be universal for a variety of tissues in addition to gastrointestinal mucosa. The therapeutic effects of rebamipide eye drops are due to its ability to increase corneal and conjunctival mucin-like s...

Splash erosion is recognized as the first stage in the process of erosion that results in bombardment of the soil's surface with rain drops. Two basic processes in soil erosion are the dispersement of soil particles by rain drops and the changes caused to the soil's structure, which are then moved by runoff. In this research,the effect of various polyacrylamide (PAM)values (0, 0.2, 0.4 and 0.6 ...

2011
Flávio Fernando Demarco Sônia Saeger Meireles Hugo Ramalho Sarmento Raquel Venâncio Fernandes Dantas Tatiana Botero Sandra Beatriz Chaves Tarquinio

This review investigates erosion and abrasion in dental structures undergoing at- home bleaching. Dental erosion is a multifactorial condition that may be idiopathic or caused by a known acid source. Some bleaching agents have a pH lower than the critical level, which can cause changes in the enamel mineral content. Investigations have shown that at-home tooth bleaching with low concentrations ...

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