scholarly journals A new approach for simulating the redistribution of soil particles by water erosion: A marker-in-cell model

2012 ◽  
Vol 117 (F4) ◽  
pp. n/a-n/a ◽  
Author(s):  
James R. Cooper ◽  
John Wainwright ◽  
Anthony J. Parsons ◽  
Yuichi Onda ◽  
Tomomi Fukuwara ◽  
...  
Keyword(s):  
Cell Model ◽  
Water Erosion ◽  
New Approach ◽  
Soil Particles

A new approach for simulating water erosion on hillslopes

2004 ◽  
Vol 25 (9) ◽  
pp. 1791-1791
Author(s):  
D. Y. Shen ◽  
A. N. Ma ◽  
H. Lin ◽  
X. H. Nie ◽  
S. J. Mao ◽  
...  
Keyword(s):  
Water Erosion ◽  
New Approach

scholarly journals The Fuel Cell Model of Abiogenesis: A New Approach to Origin-of-Life Simulations

Astrobiology ◽  
2014 ◽  
Vol 14 (3) ◽  
pp. 254-270 ◽  
Author(s):  
Laura M. Barge ◽  
Terence P. Kee ◽  
Ivria J. Doloboff ◽  
Joshua M.P. Hampton ◽  
Mohammed Ismail ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Origin Of Life ◽  
Cell Model ◽  
New Approach

scholarly journals The effect of plant cover on the mechanical composition of eroded soil

2010 ◽  
Vol 42 (2) ◽  
pp. 241-247
Author(s):  
Anna Baryła ◽  
Leszek Hejduk
Keyword(s):  
Cover Crops ◽  
Plant Cover ◽  
Chemical Compounds ◽  
Water Erosion ◽  
Fallow Land ◽  
Soil Particles ◽  
Mineral Fraction ◽  
Experimental Plots

The effect of plant cover on the mechanical composition of eroded soil Water erosion causes migration of the finest soil particles and chemical compounds. The paper attempts to compare the mechanical composition of sediments susceptible to water erosion on the hillslopes with different cover crops. The research was conducted on the experimental plots in Puczniew. Its results showed that the composition of the sediment washed out from the fallow land significantly differed from that washed out from the plots with grass and barley crops. In the case of fallow land, soil particles were markedly larger. This might indicate the existence of a very hard mineral fraction.

scholarly journals Destruction of bonds between soil particles in the process of water erosion

2015 ◽  
pp. 20-30
Author(s):  
O. G. Bushueva ◽  
A. V. Gorobets ◽  
N. G. Dobrovol’Skaya ◽  
Z. P. Kiryukhina ◽  
S. F. Krasnov ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Water Temperature ◽  
Solid Phase ◽  
Water Erosion ◽  
Water Current ◽  
Washout Rate ◽  
Shear Stresses ◽  
Soil Particles ◽  
Influence Of Water ◽  
Number Of Particles

It is known that tensile strength of soil samples is by three orders of magnitude greater than the shear stresses on the bottom of slope streams responsible for the detachment and transport of soil particles by water current. C.E. Mirtskhulava believed that detachment of soil particles by water current occurs due to the fatigue destruction of bonds between soil particles.Taking this fact into account, tensile strength is lower by two orders of magnitude. M.A. Nearing had an opinion that detachment of soil particles occurs in the points of separation of vortices from the bottom of the stream, where the shear stress is by two orders of magnitude higher than the average. These approaches did not explain overcoming by slope streams of the cohesion forces between soil particles. Studies of the influence of water temperature on the washout rate of model samples have shown that the soil erosion is highly dependent on the water temperature, which is close to the Van’t Hoff’s rule. This means that destruction of bonds between soil particles is probably the result of interaction between the soil solid phase and water molecules. Experiments have also shown that destruction of bonds between soil particles in the sample of chernozem monoaggregate soil occurs under a layer of still water. Upon the start of the water flow, particles that lost bond with the rest of the soil body immediately break away. The number of particles with disrupted bonds grows with the duration of the sample exposure to still water, although with some flattening. Experiments confirm the validity of the hypothesis of non-hydraulic nature of forces that disrupt inter-aggregate bonds during water erosion.

Assessing the contribution of nonhydraulic forces to the destruction of bonds between soil particles during water erosion

2016 ◽  
Vol 49 (5) ◽  
pp. 546-550 ◽  
Author(s):  
G. A. Larionov ◽  
O. G. Bushueva ◽  
N. G. Dobrovol’skaya ◽  
Z. P. Kiryukhina ◽  
L. F. Litvin ◽  
...  
Keyword(s):  
Water Erosion ◽  
Soil Particles

A new approach for simulating water erosion on hillslopes

2003 ◽  
Vol 24 (14) ◽  
pp. 2819-2835 ◽  
Author(s):  
D. Y. Shen ◽  
A. N. Ma ◽  
H. Lin ◽  
X. H. Nie ◽  
S. J. Mao ◽  
...  
Keyword(s):  
Water Erosion ◽  
New Approach

The O–C diagrams of minor planets − a new approach to modelling the rotation

1999 ◽  
Vol 173 ◽  
pp. 185-188
Author(s):  
Gy. Szabó ◽  
K. Sárneczky ◽  
L.L. Kiss
Keyword(s):  
Error Analysis ◽  
Time Dependence ◽  
Theoretical Work ◽  
Minor Planet ◽  
Minor Planets ◽  
New Approach ◽  
Preliminary Results ◽  
Ccd Observations

AbstractA widely used tool in studying quasi-monoperiodic processes is the O–C diagram. This paper deals with the application of this diagram in minor planet studies. The main difference between our approach and the classical O–C diagram is that we transform the epoch (=time) dependence into the geocentric longitude domain. We outline a rotation modelling using this modified O–C and illustrate the abilities with detailed error analysis. The primary assumption, that the monotonity and the shape of this diagram is (almost) independent of the geometry of the asteroids is discussed and tested. The monotonity enables an unambiguous distinction between the prograde and retrograde rotation, thus the four-fold (or in some cases the two-fold) ambiguities can be avoided. This turned out to be the main advantage of the O–C examination. As an extension to the theoretical work, we present some preliminary results on 1727 Mette based on new CCD observations.

A New Approach to the Demonstration of Oxidase-Localization Using Tannic Acid Or Catechin

1973 ◽  
Vol 31 ◽  
pp. 698-699
Author(s):  
V. Mizuhira ◽  
Y. Futaesaku
Keyword(s):  
Cross Section ◽  
Tannic Acid ◽  
Elastic Fiber ◽  
The Other ◽  
New Approach ◽  
Tissue Block ◽  
Active Reaction ◽  
The Cross

Previously we reported that tannic acid is a very effective fixative for proteins including polypeptides. Especially, in the cross section of microtubules, thirteen submits in A-tubule and eleven in B-tubule could be observed very clearly. An elastic fiber could be demonstrated very clearly, as an electron opaque, homogeneous fiber. However, tannic acid did not penetrate into the deep portion of the tissue-block. So we tried Catechin. This shows almost the same chemical natures as that of proteins, as tannic acid. Moreover, we thought that catechin should have two active-reaction sites, one is phenol,and the other is catechole. Catechole site should react with osmium, to make Os- black. Phenol-site should react with peroxidase existing perhydroxide.

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