Finite element modeling of subsurface drainage in finnish heavy clay soils

Aura, Erkki

doi:10.1016/0378-3774(95)01166-g

Cited by 14 publications

(10 citation statements)

References 5 publications

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“…The natural structure of the subsoils was good and thus, in contrast to the poorly drained heavy clay soils reported by Aura (1995), their K sat was high. Despite the heavy loading increasing BD, PR and soil homogeneity, the K sat of the soils remained high.…”

Section: Discussioncontrasting

confidence: 47%

“…In the subsoil of clay loam and in silt below 0.35 m depth, the measured values varied widely, as was also found by Aura (1995) and Alakukku (1996b). The spatial variability of K sat tends to be high due to the heterogeneity of subsoils.…”

Section: Saturated Hydraulic Conductivity (K Sat )mentioning

confidence: 57%

“…The high K sat values were partly due to cutting of the samples, which evidently increased the number of continuous pores relative to the unbroken soil profile. Using the same method of measurement as in the present investigation, Aura (1995) found, however, that in the poorly drained, heavy clay soils of Finland with no earthworm activity K sat was less than 1 cm h~ ' at depths of 0.25-0.50 m.…”

Section: Saturated Hydraulic Conductivity (K Sat )mentioning

confidence: 78%

“…After the samples had been cut, the saturated hydraulic conductivity (K sat ) and macroporosity (diameter > 300-430 urn) of the subsamples were determined according to Alakukku (1996b). The subsamples were then placed on ceramic plates (air entry value 100 kPa) for macroporosity (MP) measurements as reported in Aura (1995). MP was determined at potentials of -3, -5 and -10 kPa, corresponding to a minimum pore diameter of 100, 60 and 30 urn, respectively.…”

Section: Measurementsmentioning

confidence: 99%

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Properties of fine‐textured subsoils as affected by high axle load traffic

Alakukku¹

1997

Acta Agriculturae Scandinavica, Section B — Soil & Plant Sc

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The direct effect of high axle load traffic on subsoil physical properties was investigated in two field experiments on fine-textured mineral soils (Vertic Cambisol). A clay loam was compacted to a depth of 0.40-0.45 m by a tandem axle load of 21 Mg and a silt soil to a depth of 0.50 m by a single axle load of 11 Mg, increasing the dry bulk density, penetrometer resistance and homogeneity of the subsoils and reducing their macroporosity (>300 and 30 µm). In the silt subsoil, compaction also reduced the saturated hydraulic conductivity and number of cylindrical pores (> 1 mm). Despite compaction, the subsoils with a good natural structure appeared to be able to maintain their structure moderately well.

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Section: Discussioncontrasting

confidence: 47%

Section: Saturated Hydraulic Conductivity (K Sat )mentioning

confidence: 57%

Section: Saturated Hydraulic Conductivity (K Sat )mentioning

confidence: 78%

Section: Measurementsmentioning

confidence: 99%

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Properties of fine‐textured subsoils as affected by high axle load traffic

Alakukku¹

1997

Acta Agriculturae Scandinavica, Section B — Soil & Plant Sc

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“…Bronstert and Plate, 1997), but in agricultural fields, subsurface drains create pressure-driven flow fields which have to be handled with Darcian approaches (e.g. Köhne et al, 2006;Aura, 1995;Karvonen, 1988).…”

Section: Introductionmentioning

confidence: 99%

Simulation of water balance in a clayey, subsurface drained agricultural field with three-dimensional FLUSH model

Warsta

Karvonen²,

Koivusalo

et al. 2013

Journal of Hydrology

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Fate of the herbicides glyphosate, glufosinate‐ammonium, phenmedipham, ethofumesate and metamitron in two Finnish arable soils

Laitinen

Siimes

Eronen³

et al. 2006

Pest Management Science

114

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The fate of five herbicides (glyphosate, glufosinate-ammonium, phenmedipham, ethofumesate and metamitron) was studied in two Finnish sugar beet fields for 26 months. Soil types were sandy loam and clay. Two different herbicide-tolerant sugar beet cultivars and three different herbicide application schedules were used. Meteorological data were collected throughout the study and soil properties were thoroughly analysed. An extensive data set of herbicide residue concentrations in soil was collected. Five different soil depths were sampled. The study was carried out using common Finnish agricultural practices and represents typical sugar beet cultivation conditions in Finland. The overall observed order of persistence was ethofumesate > glyphosate > phenmedipham > metamitron > glufosinate-ammonium. Only ethofumesate and glyphosate persisted until the subsequent spring. Seasonal variation in herbicide dissipation was very high and dissipation ceased almost completely during winter. During the 2 year experiment no indication of potential groundwater pollution risk was obtained, but herbicides may cause surface water pollution.

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Finite element modeling of subsurface drainage in finnish heavy clay soils

Cited by 14 publications

References 5 publications

Properties of fine‐textured subsoils as affected by high axle load traffic

Properties of fine‐textured subsoils as affected by high axle load traffic

Simulation of water balance in a clayey, subsurface drained agricultural field with three-dimensional FLUSH model

Fate of the herbicides glyphosate, glufosinate‐ammonium, phenmedipham, ethofumesate and metamitron in two Finnish arable soils

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