Floodplain architecture of an actively meandering river (the Ploučnice River, the Czech Republic) as revealed by the distribution of pollution and electrical resistivity tomography

Grygar, Tomáš Matys; Elznicová, Jitka; Tůmová, Štěpánka; Faměra, Martin; Balogh, Márton; Kiss, Tímea

doi:10.1016/j.geomorph.2015.11.012

Cited by 39 publications

(20 citation statements)

References 35 publications

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“…Using a portable (global positioning system (GPS) coupled with geophysical imaging, particularly for methods acquiring electrical resistivity, has saved a large amount of work associated with identifying subsurface sediment bodies within a floodplain, which has considerably facilitated floodplain studies [7,8]. The performance of electrical resistivity imaging in floodplain studies has been demonstrated in previous works [9][10][11][12]. Since the beginning of the 21st century, precise digital terrain models produced from airborne laser scanning (LIDAR) data most commonly used for fluvial geomorphologic evaluation [13].…”

Section: Introductionmentioning

confidence: 99%

“…Studies on polluted floodplains are facilitated by pollution mapping that uses portable analytical instruments, including in situ analyses (without any sample pretreatment) [9,10]. In the last decade, portable analytical instruments, in particular those employing X-ray fluorescence (XRF), have reached quality levels suitable for geological research and environmental science monitoring [14].…”

Section: Introductionmentioning

confidence: 99%

“…In environmental geochemistry, portable XRF instruments are mainly used for quick pollution surveys and mapping [15][16][17][18]. Portable gamma and XRF spectrometers have also led to progress in detailed maps of pollution by radionuclides [9,[19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

“…Portable XRF instruments offer many of advantages [14]: They have much lower operating costs, require much less demanding sample preparation compared to conventional laboratory analyses and can be used in situ in real time and results are immediately displayed. XRF can also be used to characterise sediment grain size, an essential factor in understanding floodplain sedimentary bodies [8,9]. In situ XRF analysis for high-density geochemical mapping opens new perspectives for analysing polluted soils and sediments.…”

Section: Introductionmentioning

confidence: 99%

“…In our first work [4], we used GIS for the characterisation of river channel shifts [23], laboratory XRF for chemical pollution analysis and electrical resistivity tomography (ERT) for imaging the floodplain fill. We later employed surface gamma activity mapping [21], more detailed ERT imaging and XRF analyses [9]; and finally, we also added dipole electromagnetic profiling (DEMP) and optically stimulated luminescence (OSL) for sediment dating [24]. Detailed geostatistical interpretation of the results of pollution mapping by XRF is demonstrated in this paper.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Threat of Pollution Hotspots Reworking in River Systems: Case Study of the Ploučnice River (Czech Republic)

Elznicová

Grygar

Popelka

et al. 2019

IJGI

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As fluvial pollution may endanger the quality of water and solids transported by rivers, mapping and evaluation of historically polluted fluvial sediments is an urgent topic. The Ploučnice River and its floodplain were polluted by local uranium mining from 1971–1989. We have studied this river since 2013 using a combination of diverse methods, including geoinformatics, to identify pollution hotspots in floodplains and to evaluate the potential for future reworking. Archival information on pollution history and past flooding was collected to understand floodplain dynamics and pollution heterogeneity. Subsequently, a digital terrain model based on laser scanning data and data analysis were used to identify the sites with river channel shifts. Finally, non-invasive geochemical mapping was employed, using portable X-ray fluorescence and gamma spectrometers. The resulting datasets were processed with geostatistical tools. One of the main outputs of the study was a detailed map of pollution distribution in the floodplain. The results showed a relationship between polluted sediment deposition, past channel shifts and floodplain development. We found that increased concentration of pollution occurred mainly in the cut-off meanders and lateral channel deposits from the mining period, the latter in danger of reworking (reconnecting to the river) in the coming decades.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Threat of Pollution Hotspots Reworking in River Systems: Case Study of the Ploučnice River (Czech Republic)

Elznicová

Grygar

Popelka

et al. 2019

IJGI

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The fluvial architecture of buried floodplain sediments of the Weiße Elster River (Germany) revealed by a novel method combination of drill cores with two‐dimensional and spatially resolved geophysical measurements

Suchodoletz

Pohle

Khosravichenar

et al. 2022

Earth Surf Processes Landf

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The complex and non-linear fluvial river dynamics are characterized by repeated periods of fluvial erosion and re-deposition in different parts of the floodplain. Understanding the fluvial architecture (i.e. the three-dimensional arrangement and genetic interconnectedness of different sediment types) is therefore fundamental to obtain well-based information about controlling factors. However, investigating the fluvial architecture in buried floodplain deposits without natural exposures is challenging. We studied the fluvial architecture of the middle Weiße Elster floodplain in Central Germany, an extraordinary long-standing archive of Holocene flooding and

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Coupling hydrogeophysics with hydrodynamic modelling to infer subsurface hydraulic architecture of an alluvial floodplain

Martin

Everett

Knappett

2020

Near Surface Geophysics

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This paper underscores the importance of spatially dense geophysical data sets for making informed decisions in water management strategies. Such decisions may require understanding how site-specific subsurface architecture -especially hydraulic connectivity -impacts the response of a shallow aquifer to anthropogenic hydrologic disturbances (e.g. over-pumping of a shallow aquifer). At a 0.2-km2 alluvial floodplain site characterized by thick clay over fine sand to gravel and shale bedrock in the subtropical, sub-humid belt of the Gulf Coast of the United States, we image an asymmetrically shaped, compartmentalized, sand-dominated channel-belt using electrical resistivity tomography and 31 time-domain electromagnetic soundings probing to depths of ∼40 m and ∼90 m, respectively. Lithological interpretation and a hydrological model are developed based on the geophysical data and nearby sediment cores, where the resistivity of the groundwater is 9.1 Ωm. In a modelling scenario wherein the compartmentalized sand channel-belt starts out dry (i.e. an over-pumped shallow aquifer), we simulate 26 weeks of infiltration due to flooding of the surface. Preferential filling of the channel-belt occurs through its sides rather than from above, generating a new understanding of the hydraulic connectivity around and into asymmetrically shaped, sand-dominated channel-belts. This insight can inform decisions about the optimal placement of shallow water wells in a heterogeneous alluvial floodplain aquifer system and also highlights the dangers of over-pumping.

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Floodplain architecture of an actively meandering river (the Ploučnice River, the Czech Republic) as revealed by the distribution of pollution and electrical resistivity tomography

Cited by 39 publications

References 35 publications

Threat of Pollution Hotspots Reworking in River Systems: Case Study of the Ploučnice River (Czech Republic)

Threat of Pollution Hotspots Reworking in River Systems: Case Study of the Ploučnice River (Czech Republic)

The fluvial architecture of buried floodplain sediments of the Weiße Elster River (Germany) revealed by a novel method combination of drill cores with two‐dimensional and spatially resolved geophysical measurements

Coupling hydrogeophysics with hydrodynamic modelling to infer subsurface hydraulic architecture of an alluvial floodplain

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