Initial stages and evolution of recently abandoned meanders revealed by multi-proxy methods in the Odra River (Czech Republic)

Sedláček, Jan; Kapustová, Veronika; Šimíček, Daniel; Bábek, Ondřej; Sekanina, Milan

doi:10.1016/j.geomorph.2019.02.027

Cited by 15 publications

(9 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Morphological Features and Their Dynamicsmentioning

confidence: 52%

“…In June 2005 the curvature of this bend is more accentuated than that in June 2003 and it tends to migrate downstream and gradually to expand laterally. As literature indicates [53][54][55], this behavior is typical at the early evolution stages of a meander. The aforementioned behavior is also confirmed by Figure 9 where the tracers identified in February 2012 are compared with those obtained in December 2015.…”

Section: Morphological Features and Their Dynamicsmentioning

confidence: 52%

“…Thus, in such a time period, the meandering bend becomes the dominant morphological feature. According to the literature[53][54][55] for a high-amplitude meander wave the lateral expansion prevails over the downstream migration.Appl. Sci.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Investigation of a Gravel-Bed River’s Pattern Changes: Insights from Satellite Images

Termini

2021

Applied Sciences

View full text Add to dashboard Cite

Changes in river pattern have been documented in the literature. The recognition of islands and vegetated patches, which is indicative of the evolution processes, requires simultaneous information at different points and at different times and field studies are still difficult and scarce. The present work, focusing the attention on a gravel-bed river, explores the possibility to conduct a first-step pattern changes analysis by identifying the evolution of the morphological features and taking information of islands and vegetated patches from satellite images easily available from Google Earth. The study is conducted by combining the information taken from both the satellite images and the field photos and the hydrological data. Here analysis concerns a reach of the Tagliamento River, in Italy, in a decadal timescale characterized by evident stream pattern changes. Results confirm that a combination of different factors determine favorable conditions for the river’s evolution, but the frequency of occurrence of high-magnitude events is the most important factor to consider in a first-step analysis. This is because the frequency of occurrence of high-magnitude events affects, in turn, some of the other influencing factors. In particular, the present study highlights that different morphological features form in time periods characterized by different frequency of occurrence of high-magnitude events. On one hand, this could be related to the fact that high-magnitude events could influence the sediment transport and deposition mechanisms, modifying the ratio coarse-to-fine sediments and the grain-to-grain interactions, with consequences in the sediment flux variation and in the migration of the morphological features. On the other hand, the frequency of occurrence of high-magnitude events could affect the vegetation distribution and growth, contributing to determine a variation of the typology of the vegetation characteristics depending on the tolerances of the vegetation species. A sort of interface between the vegetated-dominated area, where the flow resistance is significant, and the flood-disturbance-dominated area, where the action by flow is significant, is determined with a progressive reduction of the number of active channels and development of the meandering bend.

show abstract

Section: Morphological Features and Their Dynamicsmentioning

confidence: 52%

Section: Morphological Features and Their Dynamicsmentioning

confidence: 52%

See 1 more Smart Citation

Investigation of a Gravel-Bed River’s Pattern Changes: Insights from Satellite Images

Termini

2021

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…Furthermore, riparian WBZs would support a higher habitat and species [49]. A WBZ bigger in width can support higher hydraulic residence time, thereby providing higher duration to WBZs to attenuate high nutrients in the runoff [38]. And a WBZ spread across extensive length can provide higher coverage for runoff interception.…”

Section: Discussionmentioning

confidence: 99%

“…Oder is a transboundary river, with its source in Czech Republic flows through the borders of Germany and Poland into the Baltic Sea. Being one of the largest rivers in Europe, it has a catchment area of 6252 km 2 [38].…”

Section: Nitrogen Loss Modellingmentioning

confidence: 99%

Assessment of Nutrient Loads into the Ryck River and Options for Their Reduction

Trehan

Wichtmann

Grygoruk

2022

Water

View full text Add to dashboard Cite

A massive shift in agricultural practices over the past decades, to support exceptionally high yields and productivities involving intensive agriculture, have led to unsustainable agriculture practices across the globe. Sustenance of such high yields and productivities demand high use of organic and industrial fertilizers. This acts as a negative pressure on the environment. Excessive use of fertilizers leads to nutrient surplus in the fields, which, as a part of catchment runoff, flows into the water bodies as diffuse pollution. These nutrients through rivers are eventually passed into seas. High nutrients ending up into water bodies cause eutrophication. The situation is worsened when such unsustainable agricultural activities are carried out on drained peatlands. As a result, the nutrients that were not part of the nutrient cycle in the landscape for years begin to leach out due to mineralization of peatlands, thereby putting an additional load of nutrients on the environment, that was already under the negative impact of nutrient surplus. In view of the above, a small lowland catchment of the Ryck river in northeast Germany was assessed for its nitrogen losses from agricultural lands through empirical modelling. Initial empirical modelling resulted in an average annual total nitrogen loss of 14.7 kg ha−1 year−1. After a comparative analysis of these results with procured data, the empirical equation was modified to suit the catchment, yielding more accurate results. The study showed that 75.6% of peatlands in the catchment are under agricultural use. Subsequently, a proposal was made for potential wetland buffer zones in the Ryck catchment. Altogether, 13 peatland sites across 8 sub-catchments were recommended for mitigation of high nutrient runoff. In the end, nutrient efficiency of proposed WBZs in one of the sub-catchments of Ryck has been discussed. The results show that (i) the modified empirical equation can act as a key tool in application-based future strategies for nitrogen reduction in the Ryck catchment, (ii) restoration of peatlands and introduction of WBZs can help in mitigating the nutrient runoff for improved water quality of Ryck, and subsequently (ii) contribute to efficient reduction of riverine loads of nutrients into the Baltic Sea.

show abstract

Regional Contamination History Revealed in Coal-Mining-Impacted Oxbow Lake Sediments

Sedláček

Tolaszová

Kříženecká

et al. 2020

Water Air Soil Pollut

View full text Add to dashboard Cite

Initial stages and evolution of recently abandoned meanders revealed by multi-proxy methods in the Odra River (Czech Republic)

Cited by 15 publications

References 49 publications

Investigation of a Gravel-Bed River’s Pattern Changes: Insights from Satellite Images

Investigation of a Gravel-Bed River’s Pattern Changes: Insights from Satellite Images

Assessment of Nutrient Loads into the Ryck River and Options for Their Reduction

Regional Contamination History Revealed in Coal-Mining-Impacted Oxbow Lake Sediments

Contact Info

Product

Resources

About