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Simplified technique for the determination of soil aggregation in assessing the resistance of soils to erosion and deflation

100%

Grigoriev V., Piechnik L., Podsiadlowski S.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

2008

tom 39

The technique provides for the determination of the size and percentage of aggregates of the coarse fraction on the surface of a friable soil followed by the determination of the aggregation index to be used in assessing spatial and temporal resistance of soil to erosion and defl ation. The uses of this technique make routine sampling and aggregate analysis after Savvinov unnecessary. Its some outcomes for soils of Poland are given.

Soil deflation analyses from wind erosion events

100%

Lackoova L., Urban T., Kondrlova E., Kozlovsky Dufkova J.

Acta Scientiarum Polonorum. Formatio Circumiectus

2015

tom 14

nr 3

There are various methods to assess soil erodibility for wind erosion. This paper focuses on aggregate analysis by a laser particle sizer ANALYSETTE 22 (FRITSCH GmbH), made to determine the size distribution of soil particles detached by wind (deflated particles). Ten soil samples, trapped along the same length of the erosion surface (150–155 m) but at different wind speeds, were analysed. The soil was sampled from a flat, smooth area without vegetation cover or soil crust, not affected by the impact of windbreaks or other barriers, from a depth of maximum 2.5 cm. Prior to analysis the samples were prepared according to the relevant specifications. An experiment was also conducted using a device that enables characterisation of the vertical movement of the deflated material. The trapped samples showed no differences in particle size and the proportions of size fractions at different hourly average wind speeds. It was observed that most of particles travelling in saltation mode (size 50–500 μm) – 58–70% – moved vertically up to 26 cm above the soil surface. At greater heights, particles moving in suspension mode (floating in the air; size < 100 μm) accounted for up to 90% of the samples. This result suggests that the boundary between the two modes of the vertical movement of deflated soil particles lies at about 25 cm above the soil surface.

Ograniczanie wyników

1 Acta Scientiarum Polonorum. Formatio Circumiectus

1 Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

1 Grigoriev V.

1 Kondrlova E.

1 Kozlovsky Dufkova J.

1 Lackoova L.

1 Piechnik L.

1 Podsiadlowski S.

1 Urban T.

1 2015

1 2008

Wyniki wyszukiwania

Simplified technique for the determination of soil aggregation in assessing the resistance of soils to erosion and deflation

Soil deflation analyses from wind erosion events