Saturated areas through the lens: 1. Spatio‐temporal variability of surface saturation documented through thermal infrared imagery

Antonelli, Marta; Glaser, Barbara; Teuling, Adriaan J.; Klaus, Julian; Pfister, Laurent

doi:10.1002/hyp.13698

Cited by 19 publications

(45 citation statements)

References 77 publications

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“…A third, few metres long stream branch is situated in the west of the central stream valley. Riparian zones along the stream account for 1.2 % of the catchment area (Antonelli et al, 2019). Large parts of the catchment are forested with deciduous trees (mainly European beech and Sessile oaks), the south-east and some other small parts are forested with conifers (mainly Norway spruce and Douglas spruce).…”

Section: Physiography Climate and Hydrometrymentioning

confidence: 99%

“…We focus in this study on seven distinct riparian areas in the catchment, which can be classified into three different categories (cf. Antonelli et al, 2019): i) stream source areas with perennial springs (L1, M3, R3, blue areas Fig. 1), ii) areas along the stream with perennial springs (M2, S2, yellow areas Fig.…”

Section: Surface Saturationmentioning

confidence: 99%

“…We mapped the surface saturation in these seven riparian areas weekly to biweekly from November 2015 to December 2017 with thermal infrared imagery (TIR). Details on the identification of surface saturation with TIR imagery and on the collected surface saturation dataset are presented and discussed in Glaser et al (2018) and Antonelli et al (2019). In brief, we created panoramic TIR images of the distinct areas and identified the locations of surface saturation (including the stream) within the images.…”

Section: Surface Saturationmentioning

confidence: 99%

“…Previous work showed that recurrent mapping of surface saturation with high spatial resolution is possible with TIR imagery (Glaser et al, 2016;Pfister et al, 2010). Glaser et al (2018) and Antonelli et al (2019) applied TIR imagery mapping in the 42 ha forested Weierbach catchment in western Luxembourg and monitored the dynamics of surface saturation within several distinct riparian areas along the Weierbach stream with a weekly to biweekly mapping frequency over several seasons.…”

Section: Introductionmentioning

confidence: 99%

“…In this study, we explore the intra-catchment variability of temporal and spatial characteristics of surface saturation (dynamics, frequencies, patterns) with a combination of field observation and modelling. We perform the study in the Weierbach catchment, where we can rely on existing TIR imagery data (Antonelli et al, 2019;cf. Glaser et al, 2018) and on previous modelling work for a 6 ha headwater of the catchment (Glaser et al, 2016(Glaser et al, , 2019 with the ISSHM HydroGeoSphere.…”

Section: Introductionmentioning

confidence: 99%

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Intra-catchment variability of surface saturation – insights from longterm observations and simulations

Glaser

Antonelli

Hopp

et al. 2019

Preprint

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Abstract. The inundation of flood-prone areas varies in space and time and can have crucial impacts on runoff generation and water quality when the surface saturated areas become connected to the stream. In this study, we aimed to investigate and explain the variability of surface saturation patterns and dynamics within a forested headwater catchment. On the one hand, we mapped surface saturation in seven distinct riparian areas of the Weierbach catchment (Luxembourg) with thermal infrared images, taken weekly to bi-weekly over a period of two years. On the other hand, we simulated the surface saturation generation in the catchment with the integrated surface subsurface hydrologic model HydroGeoSphere over the same period. Both the observations and simulations showed that the saturation dynamics were similar across the catchment, but that small differences between the dynamics at different areas occurred. Moreover, the model reproduced the observed saturation patterns well for all seasonal and hydrologic conditions and at all investigated locations. Based on the observations and simulation results and the matches and mismatches between them, we concluded that the generation of surface saturation in the Weierbach catchment was largely controlled by exfiltration of groundwater into local depressions. However, we also illustrate that the entire variability of the patterns, dynamics and frequencies of surface saturation within the different riparian areas of the catchment can only result from additional controlling factors to microtopography and groundwater exfiltration, such as differing hysteretic behaviour, differing subsurface structures, or additional water sources.

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Section: Physiography Climate and Hydrometrymentioning

confidence: 99%

Section: Surface Saturationmentioning

confidence: 99%

Section: Surface Saturationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Intra-catchment variability of surface saturation – insights from longterm observations and simulations

Glaser

Antonelli

Hopp

et al. 2019

Preprint

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Groundwater affects the geomorphic and hydrologic properties of coevolved landscapes

Litwin¹,

Harman²,

Tucker³

et al. 2021

Preprint

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Introduction MotivationLandscape morphology and subsurface structure are strong predictors of runoff generation style and spatial distribution (Dunne, 1978). In humid climates, the infiltration capacity of undisturbed soil is high and overland flow due to exceedance of soil infiltration capacity is rare. When relief is relatively low and soils are relatively thin, runoff is most commonly generated by the expansion of variable source areas, which may generate overland flow where precipitation falls directly on saturated areas (Dunne & Black, 1970). In steeper landscapes with deep soils, water may be transmitted laterally through the subsurface at permeability contrasts, becoming surface

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Saturated areas through the lens: 2. Spatio‐temporal variability of streamflow generation and its relationship with surface saturation

Antonelli

Glaser

Teuling

et al. 2019

Hydrological Processes

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Investigating the spatio‐temporal variability of streamflow generation is fundamental to interpret the hydrological and biochemical functioning of catchments. In humid temperate environments, streamflow generation is often linked to the occurrence of near stream surface saturated areas, which mediate hydrological connectivity between hillslopes and streams. In this second contribution of a series of two papers, we used salt dilution gauging to investigate the spatio‐temporal variability of streamflow in different subcatchments and for different reaches in the Weierbach catchment (0.42 km2) and explored the topographical controls on streamflow variability. Moreover, we mapped stream network expansion and contraction dynamics. Finally, we combined the information on the spatio‐temporal variability of streamflow with the characterization of riparian surface saturation dynamics of seven different areas within the catchment (mapped with thermal infrared imagery, as presented in our first manuscript). We found heterogeneities in the streamflow contribution from different portions of the catchment. Although the size of the contributing area could explain differences in subcatchments' and reaches' net discharge, no clear topographic controls could be found when considering the area‐normalized discharge. This suggests that some local conditions exert control on the variability of specific discharge (e.g., local bedrock characteristics and occurrence of perennial springs). Stream network dynamics were found not to be very responsive to changes in catchment's discharge (i.e., total active stream length vs. stream outlet discharge relationship could be described through a power law function with exponent = 0.0195). On the contrary, surface saturation dynamics were found to be in agreement with the level of streamflow contribution from the correspondent reach in some of the investigated riparian areas. This study represents an example of how the combination of different techniques can be used to characterize the internal heterogeneity of the catchment and thus improve our understanding of how hydrological connectivity is established and streamflow is generated.

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Saturated areas through the lens: 1. Spatio‐temporal variability of surface saturation documented through thermal infrared imagery

Cited by 19 publications

References 77 publications

Intra-catchment variability of surface saturation – insights from longterm observations and simulations

Intra-catchment variability of surface saturation – insights from longterm observations and simulations

Groundwater affects the geomorphic and hydrologic properties of coevolved landscapes

Saturated areas through the lens: 2. Spatio‐temporal variability of streamflow generation and its relationship with surface saturation

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