Browsing NIBIO Brage by Author "Jarvis, Nicholas"
Now showing items 1-4 of 4
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A Dual-Permeability Approach for Modeling Soil Water Flow and Heat Transport during Freezing and Thawing
Larsbo, Mats; Holten, Roger; Stenrød, Marianne; Eklo, Ole Martin; Jarvis, Nicholas (Journal article; Peer reviewed, 2019-08-22)Preferential flow may become significant in partially frozen soils because infiltration can occur through large, initially air-filled pores surrounded by a soil matrix with limited infiltration capacity. The objectives of ... -
Estimating the Permeability of Naturally Structured Soil From Percolation Theory and Pore Space Characteristics Imaged by X-Ray
Koestel, John; Dathe, Annette; Skaggs, Todd H.; Klakegg, Ove Mindor; Ahmad, Muhammad Arslan; Babko, Maryia; Giménez, Daniel; Farkas, Csilla; Nemes, Attila; Jarvis, Nicholas (Journal article; Peer reviewed, 2018-10-30)The saturated hydraulic conductivity of soil, Ks, is a critical parameter in hydrological models that remains notoriously difficult to predict. In this study, we test the capability of a model based on percolation theory ... -
Leaching of Five Pesticides of Contrasting Mobility through Frozen and Unfrozen Soil
Holten, Roger; Larsbo, Mats; Jarvis, Nicholas; Stenrød, Marianne; Almvik, Marit; Eklo, Ole Martin (Journal article; Peer reviewed, 2019)Field and laboratory studies show increased leaching of pesticides through macropores in frozen soil. Fast macropore flow has been shown to reduce the influence of pesticide properties on leaching, but data on these processes ... -
The effect of freezing and thawing on water flow and MCPA leaching in partially frozen soil
Holten, Roger; Bøe, Frederik; Almvik, Marit; Katuwal, Sheela; Stenrød, Marianne; Larsbo, Mats; Jarvis, Nicholas; Eklo, Ole Martin (Journal article; Peer reviewed, 2018-11-13)Limited knowledge and experimental data exist on pesticide leaching through partially frozen soil. The objective of this study was to better understand the complex processes of freezing and thawing and the effects these ...