On the controls of preferential flow in soils of different hillslope position and lithological origin

Tang, Qing; Duncan, J. M.; Guo, Li; Lin, Henry; Xiao, Dacheng; Eissenstat, David M.

doi:10.1002/hyp.13883

Cited by 21 publications

(4 citation statements)

References 72 publications

(115 reference statements)

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“…Data on hydrological and meteorological processes occurring in the CZO came from the large number of continuously operating instruments in this watershed (Brantley et al., 2016, 2018). GroundHOG sites (Brantley et al., 2016; Tang et al., 2020) recorded soil moisture and soil temperature separately at SPMS and SPVF and precipitation at SPMS (Eissenstat et al., 2020; Li & Eissenstat, 2020a, 2020b). Water levels were monitored in three wells near the SPMS and SPVF sites (CZMW8 at the ridge crest and Wells 5 and 7 at the valley floor) (Brantley & Gu, 2020a, 2020b, 2020c).…”

Section: Methodsmentioning

confidence: 99%

Seismic Ambient Noise Analyses Reveal Changing Temperature and Water Signals to 10s of Meters Depth in the Critical Zone

Oakley

Forsythe

et al. 2021

JGR Earth Surface

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The critical zone sustains terrestrial life, but we have few tools to explore it efficiently beyond the first few meters of the subsurface. Using analyses of high‐frequency ambient seismic noise from densely spaced seismometers deployed in the forested Shale Hills subcatchment of the Susquehanna Shale Hills Critical Zone Observatory (SSHCZO), we show that temporal changes in seismic velocities at depths from ∼1 m to tens of m can be detected. These changes are driven by variations at the land surface. The Moving‐Window Cross‐Spectral (MWCS) method was employed to measure seismic‐velocity changes in coda waves at hourly resolution in 10 different frequency bands. We observed a diurnal signal, a seasonal signal, and a meteorological‐event‐based signal. These signals were compared to time‐series measurements of precipitation, well water levels, soil moisture, soil temperature, air temperature, latent heat flux, and air pressure in the heavily instrumented catchment. Most of the velocity changes can be explained by variations in temperature that result in thermoelastic strains that propagate to depth. But some double minima in seismic velocity time‐series observed after large rain events were attributed in part to the effects of water infiltration. These results show that high‐frequency ambient noise data may in some locations be used to detect changes in the critical zone from ∼1 to ∼100 m or greater depth with hourly resolution. But interpretation of such data requires multiple environmental data sets to deconvolve the complex interrelationships among thermoelastic and hydrological effects in the subsurface critical zone.

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Section: Methodsmentioning

confidence: 99%

Seismic Ambient Noise Analyses Reveal Changing Temperature and Water Signals to 10s of Meters Depth in the Critical Zone

Oakley

Forsythe

et al. 2021

JGR Earth Surface

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“…Initial soil water conditions were not identified as controlling factors in both forests, and this is consistent with Nimmo (2012) who argued that local saturation of soil was more likely to drive PF regardless of initial soil water conditions. Similarly, Wiekenkamp et al (2016) found no clear relationship between the PF frequency and initial soil water conditions when rainfall amount was less than 25 mm, and Tang et al (2020) found a significant effect of initial soil water conditions on PF occurrence at only one of three studied sites. Notably, soil moisture showed slight fluctuation owing to plentiful and concentrated throughfall during the monitoring period and was possibly far from the threshold of influencing PF occurrence (Figure S3).…”

Section: Discussionmentioning

confidence: 91%

“…An alternative method utilizing a high‐frequency soil moisture monitoring network was developed, which has advanced in‐situ detection of PF across spatial and temporal scales (Graham & Lin, 2011; Wiekenkamp et al, 2016). Using this method, researchers have gained a new understanding of PF relationships with watershed characteristics, such as rainfall events (Jost et al, 2012; Lozano‐Parra et al, 2015; Tian et al, 2019), soil depth and hillslope topography (Graham & Lin, 2011; Liu & Lin, 2015; Wiekenkamp et al, 2016), and initial soil water conditions and landforms (Demand et al, 2019; Holden, 2009; Liu & Lin, 2015; Tang et al, 2020). However, using a data‐intensive network‐based approach alone cannot resolve individual PF pathways or establish the continuity and possible soil depths of the PF processes.…”

Section: Introductionmentioning

confidence: 99%

Preferential flow patterns in forested hillslopes of east Tibetan Plateau revealed by dye tracing and soil moisture network

Wang

Cui

et al. 2022

European J Soil Science

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Preferential flow (PF) through soil and regolith results in a rapid vertical and lateral water movement within the profile. This study focused on quantifying PF in contrasting forested hillslopes of the Hailuo Valley, located on China's east Tibetan Plateau. Quantifying PF in this region is challenging since the underlying matrix is complex, with shallow soils, thick underlying saprolite, and the combined effect of moraines and weathered residual material. We developed new methods that integrated dye tracing with a high‐frequency soil moisture monitoring network to characterise PF pathways and quantity PF frequency on contrasting forested hillslopes (coniferous and broadleaved). Dye tracing experiments showed that soil‐root interfaces in the upper soil layer (10–50 cm) and soil‐rock interfaces in the deeper soil layer (50–100 cm) were the primary PF pathways and that large rocks strongly influence the percolation depth of water. The high‐frequency soil moisture network revealed that the mean PF frequency was 67.8% and 71.7% in the coniferous and broadleaved forests, respectively. The frequency of PF in the deeper soil layer increased from upslope to the downslope locations on both forested hillslopes, highlighting the tendency for PF to occur downslope. In addition to matrix conditions (e.g., stony saprolite soil), the total amount and maximum intensity of precipitation (as throughfall in this study) were identified as factors that control PF occurrence. In contrast, the initial soil water conditions (at 10, 50 and 100 cm depth) were insignificant in predicting PF occurrence. Results of this field‐based study highlight that PF is a ubiquitous and critical subsurface flow mechanism that regulates rainfall‐runoff relationships in forests of the Tibetan Plateau, underscoring the need to consider PF in hillslope hydrological modelling. Highlights Combined dye tracing and soil moisture monitoring network were applied to explore PF on forested hillslopes. Root networks and rock fragments constituted the main PF paths. PF frequency increased from upslope to downslope in two forest types. Initial soil moisture conditions showed no controlling effect on PF occurrence.

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“…In the Włocławek reservoir, in addition to the information on the sediments excavated in 2014-2019, in order to fully present this topic, it is also necessary to note that such activities have also recently been carried out, producing the following volumes of collected sediments: Dredging works on the Włocławek reservoir are mainly aimed at ensuring appropriate conditions for winter flood protection [54], including the permeability of the bed for ice flow in a longitudinal profile. Their importance was visible, e.g., in 2021, where, due to significant ice cover, the icebreaker action also reached an area of intense sediment accumulation.…”

Section: Figurementioning

confidence: 99%

Inventory of Reservoirs of Key Significance for Water Management in Poland—Evaluation of Changes in Their Capacity

et al. 2021

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Dam reservoirs constitute an important element of protection against floods and hydrological droughts, and they ensure the possibility of producing electricity. Loss of reservoirs’ storage capacity has a significant impact on the management of their water resources, including flood protection and counteracting the effects of drought and the possibility of producing electricity. The paper presents changes in the capacity of 47 reservoirs in Poland that have the status of key objects of protection against floods and hydrological drought. Based on the collected, unpublished data, the changes in capacity from the beginning of the reservoirs’ existence to 31 March 2021 were calculated, which allowed us to determine the total amount of lost capacity and the pace of the processes taking place. From the beginning of operation (average operation time 48 years), the capacity has decreased by about 5%, which means that almost 200 million m3 less water is stored. Detailed analyses of the lost capacity also allowed for an illustrative presentation of forecasts for further changes in the short and long term. The results obtained represent a unique contribution to future national strategies for the management of sediment and reservoirs’ flood reserve and reduction of drought. The presentation of this problem seems to be important also in the context of climate change.

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On the controls of preferential flow in soils of different hillslope position and lithological origin

Cited by 21 publications

References 72 publications

Seismic Ambient Noise Analyses Reveal Changing Temperature and Water Signals to 10s of Meters Depth in the Critical Zone

Seismic Ambient Noise Analyses Reveal Changing Temperature and Water Signals to 10s of Meters Depth in the Critical Zone

Preferential flow patterns in forested hillslopes of east Tibetan Plateau revealed by dye tracing and soil moisture network

Inventory of Reservoirs of Key Significance for Water Management in Poland—Evaluation of Changes in Their Capacity

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