Influence of individual oak (Quercus robur) trees on saturated hydraulic conductivity

Chandler, K.; Chappell, Nick A.

doi:10.1016/j.foreco.2008.06.033

Cited by 42 publications

(32 citation statements)

References 68 publications

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“…Therefore, the most favorable conditions to improve water permeability under saturated conditions in the surface soil layer of the sampled basin occurred when forest was established on medium-texcured or relatively coarse-textured soils. Also for this variable, the results of this investigation were in line with those obtained by different researchers (Table 5 and also Chandler and Chappell, 2008, Table 1) because they suggested that the K^ increase due to the conversion of pasture into forest may vary from negligible (unaffected K^ to substantial (orders of magnitude). Price et al (2010) suggested that the land use signature on soil K^ is independent of soil type.…”

Section: Referencesupporting

confidence: 91%

“…According to Chandler and Chappell (2008), it is not universally true that trees enhance A' compared with pasture, although most investigations support this idea. Further experimental investigations have to be performed to improve understanding of the soil changes associated with land use changes between forest and pasture to elucidate the possible implications for the atmospheric environment, including the local microclimate (Teuling et al, 2010), and to develop practical predictive criteria for expected land use change effects on soil hydraulic properties.…”

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confidence: 99%

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Comparing Physical Quality of Forest and Pasture Soils in a Sicilian Watershed

Agnese

Bagarello

Baiamonte

et al. 2011

Soil Science Society of America Journal

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Forest and pasture soils should have differing properties due, for example, to differing root characteristics or livestock trampling rates, but contradictory results have been reported in the literature. The surface soil physical and hydraulic properties of five forest and pasture sites were determined in a Sicilian watershed. In general, forest soils had a significantly lower bulk density, p^ (by 17-35%), and a higher field saturated hydraulic conductivity, Kf( by a factor of 3.4-11.5), than pasture soils. Differences between the water retention characteristics of Forest and pasture soils were low when high levels of organic matter, OM (>7.1%), were detected for both land uses. The mean Kf^ varied with the amount of large pores (i.e., larger than 596 or 298 \im) in the soil. The mean of A";^ also increased with increasing OM content and decreased with an increase in p^ (coefficient of determination 0.69-0.74). According to existing guidelines for evaluating soil physical quality, a good or relatively good quality forest soil was a common result. At three sites, a worse pasture soil physical quality was detected than that of the forest.In conclusion, changing land use from pasture to forest should have a favorable impact on hydrologie processes in the sampled watershed due to the better physical quality of forest soils. The order of magnitude of the mean Kf^ was predictable using laboratory data. The applicability of the existing guidelines to assess soil physical quality was indirectly supported in this investigation because a better quality was expected for the forest soils than the pasture soils.

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Section: Referencesupporting

confidence: 91%

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confidence: 99%

Comparing Physical Quality of Forest and Pasture Soils in a Sicilian Watershed

Agnese

Bagarello

Baiamonte

et al. 2011

Soil Science Society of America Journal

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“…The effects of plants on soil permeability are instead more controversial. As reviewed by Chandler and Chappell () and recalled by Archer et al . (), it is commonly accepted that trees enhance soil permeability (Lorimer and Douglas, ; Greenwood and Buttle, ).…”

Section: Introductionmentioning

confidence: 99%

Soil permeability, aggregate stability and root growth: a pot experiment from a soil bioengineering perspective

2015

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Assessing the joint development of vegetation cover and soil properties is crucial to evaluate the efficiency of soil bioengineering techniques, especially during the most critical initial phase of vegetation colonization. We set up a laboratory experiment to quantify and disentangle the effect of Alnus incana roots on soil permeability and aggregate stability. Plants were grown in pots in a climate chamber for four different growing periods (1, 2, 4 and 8 months). Pots were filled with a soil coming from a moraine of a landslide area in Central Switzerland. After each growing period, surface permeability, soil volume permeability and soil aggregate stability were measured together with the development of the root systems. Our results show that alder roots significantly improve both surface and whole soil volume permeability already after 2 months of growth. Nevertheless, an increase in root length density does not necessarily correspond to an increase in permeability. We could set as a threshold a root length density of 0.1 cm/cm 3 until which an increase in root development corresponds to an increase in soil permeability, whereas after this threshold we observed a decrease in soil permeability. A significant increase in soil aggregate stability could be observed only with a root length density of 2 cm/cm 3 . No obvious correlation between soil permeability and aggregate stability could be found. Future work should validate these laboratory results with field data.

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“…the Glover solution, overestimates Kfs when compared to the Richards equation, but according to Talsma (1987) the CHWP method using the Glover solution underestimates Kfs in comparison to the AH method (Talsma 1987). Even though the Richards equation provides the lowest Kfs of all the solutions in most studies, it is the main solution used to estimate in situ Kfs in the UK (Ragab and Cooper 1993;Lilly 1994;Chandler and Chappell 2008;Marshall et al 2009;MacDonald et al 2012). It is also worth noting that other studies have multiplied the Guelph permeameter values (calculated using the Richards solution) by 2 to obtain similar Ks values to the auger hole method (Noshadi et al 2012), which they attribute to air entrapment (Bouwer 1978, p. 45).…”

Section: Effect Of Smearing and The Over/under-estimation Of Chwp Kfsmentioning

confidence: 99%

A constant head well permeameter formula comparison: its significance in the estimation of field-saturated hydraulic conductivity in heterogeneous shallow soils

et al. 2014

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We evaluate the application and investigate various formulae (and the associated parameter sensitivities) using the constant head well permeameter method to estimate field-saturated hydraulic conductivity (Kfs) in a previously glaciated temperate landscape in the Scottish Borders where shallow soils constrain the depth of augering.In finer-textured soils, the Glover equation provided Kfs estimates, nearly twice those of the Richards' equation. For this environment we preferred the Glover equation with a correction factor for the effect of gravity, which does not include soil capillarity effects because: 1) the low depth to diameter ratio of the auger holes required in the shallow stratified soils of temperate glaciated environment needs a correction for gravity; 2) the persistently moist environment and the use of long pre-wetting times before measurements seem to reduce the effect of soil capillarity, 3) the Richards equation is dependent on accurate α* values, but the measured auger holes intersected soil horizon boundaries that had different soil structure and texture, causing difficulty to select the most appropriate α* value; 4) when comparing the different solutions to estimate Kfs using the CHWP method against the auger hole method and ponded permeameter measurements, the Glover solution with a correction for gravity gave the best comparable result in fine-textured soil.

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Influence of individual oak (Quercus robur) trees on saturated hydraulic conductivity

Cited by 42 publications

References 68 publications

Comparing Physical Quality of Forest and Pasture Soils in a Sicilian Watershed

Comparing Physical Quality of Forest and Pasture Soils in a Sicilian Watershed

Soil permeability, aggregate stability and root growth: a pot experiment from a soil bioengineering perspective

A constant head well permeameter formula comparison: its significance in the estimation of field-saturated hydraulic conductivity in heterogeneous shallow soils

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