Unsaturated water flux at mid and lower slope positions within an inclined landscape of the Dark Brown soil zone in southern Alberta

MillerJ., J.; ChanasykD., S.

doi:10.4141/cjss-2014-058

Cited by 3 publications

(8 citation statements)

References 31 publications

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“…15,49 The shallow topsoil and impermeable subsoil, characteristic of the North Otago Rolling Downlands soils, along with an ability for excess water to drain down the slope are factors that prevent prolonged periods when SWC > CWC. 50 The number of days during the milking season in which SWC of the irrigated plots exceeded CWC varied greatly between years, e.g. 156 (2010-2011), 46 (2011-2012), 57 (2012-2013) and 99 (2013-2014) days.…”

Section: Soil Water Content and Grazing Eventsmentioning

confidence: 99%

Assessing the production and economic benefits from preventing cows grazing on wet soils in New Zealand

2016

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Section: Soil Water Content and Grazing Eventsmentioning

confidence: 99%

Assessing the production and economic benefits from preventing cows grazing on wet soils in New Zealand

2016

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“…The DD was higher than 300 mm (400 mm mostly) in many years for 7 of the 12 sites, and the precipitation was higher than 1000 mm at 4 of these 7 sites in majority of the years, when the soil was assumed to be sandy (Brown et al, 2013). Miller et al (2014) measured the vertical unsaturated water flux below the plant root zone at mid and lower slope positions within an inclined landscape of dark brown soil zone in southern Alberta for 1985 and 1986. There were two sites for this study, one of which was at mid slope with annual cropping and located in a local groundwater recharge area, whereas the lower slope had permanent grass cover and in a groundwater discharge area (Miller et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Miller et al (2014) measured the vertical unsaturated water flux below the plant root zone at mid and lower slope positions within an inclined landscape of dark brown soil zone in southern Alberta for 1985 and 1986. There were two sites for this study, one of which was at mid slope with annual cropping and located in a local groundwater recharge area, whereas the lower slope had permanent grass cover and in a groundwater discharge area (Miller et al, 2014). Darcy's law was used to calculate the unsaturated water flux (q):…”

Section: Introductionmentioning

confidence: 99%

“…This study follows the method of Miller et al (2014) to estimate DD during successive dry and wet years at a forested site in Guelph, Ontario. Overall, Miller et al (2014) determined the vertical water flux to be mostly downward at the mid slope site for the two years, ranging from <10-11 to 10-10 ms-1, located in a recharge area. However, in 1985 there was higher upward flow, whereas downward flow was more dominant in 1986.…”

Section: Introductionmentioning

confidence: 99%

“…Overall, the water flux for both years ranged from <10-11 m s-1 to 10-9 m s-1 for the lower slope site. According to Miller et al (2014), the upward flow was possibly due to high evaporation rate at the soil surface, along with a shallow water table. The total water flow as a percentage of annual precipitation at the mid slope site was approximately 0.8-1.8%, whereas at the lower slope it was 0.3-0.5% (Miller et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Determining and Comparing Deep Drainage between Two Years – Dry (2012) and Wet (2013) – using Darcy’s Law

Tamang

2020

SURG

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Understanding of the downward flux of water below the plant root zone, known as deep drainage (DD), is significant in agriculture and soil water conservation. It plays a key role to determine the amount of water that travels below the plant root zone and can potentially cause groundwater recharge. The DD in soil varies with location, soil texture, and topography. Thus, the objectives of this study were to determine the unsaturated hydraulic conductivity, soil water storage, and DD for the years 2012 (dry year) and 2013 (wet year) at the University of Guelph’s Arboretum. The depths to the water table data were collected using a Mini Water Level Meter. CS616 sensors were used to determine the soil volumetric water content. The soil temperature was extracted with the use of T107 Temperature Probes. The slug test, based on the Hvorslev method, was performed to determine the field saturated hydraulic conductivity. The soil moisture retention curve was produced based on the data collected in the lab with the use of pressure plate systems, using van Genuchten’s equation. The unsaturated hydraulic conductivity was also determined using van Genuchten’s equation. Darcy’s law was used to determine the specific discharge, which was then converted to the total DD. In general, the soil water storage was 38.5 mm higher in 2013 relative to 2012. The unsaturated hydraulic conductivity was approximately 2 times higher in 2013 than 2012. The average DD was approximately 25 mm higher in 2013. This study provides information needed to better understand the movement and amount of water flux and DD in larger details.

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Evaluating the effect of coal mining subsidence on the agricultural soil quality using principal component analysis

Gao

Zhao

Chang

et al. 2018

Chil. j. agric. res.

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Quantifying the effects of coal mining subsidence on soil quality is critical for developing sustainable strategies in the local agriculture. The objective of this study was to assess the effects of slope position because of coal mining on soil quality using principal component analysis. Soil samples were collected from five positions in the subsided farmland: Top slope position (1), upper slope position (2), middle slope position (3), lower slope position (4), and bottom position (5). Samples from an adjacent non-subsided farmland (CK) were used as a reference. For each soil sample, 21 different physical, chemical and biological attributes were investigated. The principal components analysis (PCA) identified the bulk density (BD), salinity, organic matter (OM) content, urease enzymatic activity (UA), actinomycete quantities (AQ), polyphenol oxidase enzymatic activity (POA) and phosphatase enzymatic activity (PA) as the most sensitive indicators in a minimum data set (MDS) to assess the soil quality. The soil quality index (SQI) was highest for positions 5 (1.220), 4 (1.203), CK (1.101), 1 (1.093), 3 (1.080), and 2 (1.044). Positions 5 and 4 had higher SQI values but lower crop yields than CK, which suggests that higher SQI does not represent higher production, and other soil quality indicators, which were not investigated in this study, had stronger effects on the crop productivity. Overall, the slope position because of coal mining subsidence strongly affected the soil quality and crop yields.

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Unsaturated water flux at mid and lower slope positions within an inclined landscape of the Dark Brown soil zone in southern Alberta

Cited by 3 publications

References 31 publications

Assessing the production and economic benefits from preventing cows grazing on wet soils in New Zealand

Assessing the production and economic benefits from preventing cows grazing on wet soils in New Zealand

Determining and Comparing Deep Drainage between Two Years – Dry (2012) and Wet (2013) – using Darcy’s Law

Evaluating the effect of coal mining subsidence on the agricultural soil quality using principal component analysis

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