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Wyszukujesz frazę "subsurface erosion" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Impact of land use and soil properties on piping in Belgium
Autorzy:
Verachtert, E.
Devoldere, S.
Van Den Eeckhaut, M.
Poesen, J.
Powiązania:
https://bibliotekanauki.pl/articles/295206.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
soil piping
subsurface erosion
biological activity
earthworm
Opis:
Field observations and literature reveal that land use and soil characteristics play an important role in the development of piping. In this study, the hypothesis is tested that discontinuities in the soil profile favour piping erosion in loess-derived soils in a temperate humid climate. Abiotic characteristics (clay content, bulk density, Ksat, penetration resistance) and the biological activity in the soil were measured for each soil horizon until a depth of at least 40 cm below the pipes (ca. 1.30 m) for 12 representative soil profiles with different land use (pasture with and without collapsed pipes, arable land and forest). No clear discontinuities in abiotic characteristics were observed at soil depths where subsurface pipes occurred, but pastures with piping had significantly more earthworm channels and mole burrows at larger depths than pastures without piping, arable land or forest.
Źródło:
Landform Analysis; 2011, 17; 215-218
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pinhole test for identifying susceptibility of different horizons in less - derived soils to piping erosion
Autorzy:
Nadal-Romero, M. E.
Verachtert, E.
Poesen, J.
Powiązania:
https://bibliotekanauki.pl/articles/295142.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
pinhole test
subsurface erosion
hydraulic head
antecedent soil moisture content
water quality
Opis:
The pinhole test is an empirical test based on the qualitative evaluation of the dispersivity (colloidal erodibility) of compacted fined-grained soils. This study evaluates the pinhole test device for the quantitative assessment of the susceptibility of soil horizons to piping. The experiments performed on different loess-derived soil horizons, with different hydraulic head and using distilled water show that the clay-enriched horizon (Bt horizon) is less susceptible to piping than the decalcified (C1) and the calcareous horizon (C2). This study demonstrates that the pinhole test is suitable for assessing the susceptibility of soil horizons to piping in a quantitative way.
Źródło:
Landform Analysis; 2011, 17; 131-134
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie metody konduktometrycznej do typowania stref o zmiennych parametrach filtracyjnych w obrębie podstawy wału przeciwpowodziowego
Application of the conductivity methods to select zones with variable filtration parameters around the base of river levee
Autorzy:
Cygal, A.
Stefaniuk, M.
Kret, A.
Klityński, W.
Powiązania:
https://bibliotekanauki.pl/articles/2075405.pdf
Data publikacji:
2015
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
metody konduktometryczne
wał przeciwpowodziowy
przebicie hydrauliczne
geofizyka niesejsmiczna
conductivity methods
river levee
subsurface erosion
non-seismic geophysics
Opis:
The need to continuously monitor the flood embankment is necessary to introduce the measurement methods which give quick results in crisis situations. The protection of embankments as well as the prevention from floods are not only associated with the examination of the body river levee. Experience suggests that one of the problems involves the unknown geotechnical conditions of the levee base. Unfortunately, point geotechnical surveys carried out with a big measurement step were not able to fully identify the lithology variation over larger areas. This is caused by the high cost of drilling shallow wells. The application of non-invasive geophysical methods allows the completion of geotechnical research, and supplies additional information about the variability of geological medium. The structure in the area of the former river beds creates favorable conditions for carrying out geophysical surveys dependent on the variability of geoelectrical properties of rocks. This problem is solved by the use of conductivity method on the 100 m long part of the flood bank. This is recommended for quick and non-invasive measurements. A complex interpretation of geotechnical, hydrogeological and geophysical data provided information about the variability of geoelectrical parameters over this area and therefore made it possible to identify areas prone for greater filtration during high water levels.
Źródło:
Przegląd Geologiczny; 2015, 63, 10/1; 652--656
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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