Floods and Flash-Floods Related to River Channel Dynamics

Grécu, Florina; Zaharia, Liliana; Ioana-Toroimac, Gabriela; Armaş, Iuliana

doi:10.1007/978-3-319-32589-7_33

Cited by 18 publications

(14 citation statements)

References 17 publications

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“…4a, b, c). The years 2005 and 2010 witnessed the peaks of all three variables that might be one of the reasons for the debris flows and flash floods in the region in these years (Micu et al 2013;Grecu et al 2017). The temporal increase of these parameters is also evident in the monthly regime (Fig.…”

Section: )mentioning

confidence: 87%

“…in this region in the last decade and possibility of more such events in the near future (Micu et 130 al. 2013;Ilinca 2014;Grecu et al 2017;Micu et al 2019). Apart from the temporally enhanced rainfall, surface runoff, soil moisture, the study area is also subjected to frequent earthquakes owing to its position in the Vrancea Seismic Zone that is one of the most active seismic zones in Europe (Fig.…”

Section: )mentioning

confidence: 99%

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Evaluating landslide response in seismic and rainfall regime: A case study from the SE Carpathians, Romania

Kumar

Cauchie

Mreyen

et al. 2021

Preprint

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Abstract. There have been many studies exploring the rainfall induced slope failures in the earthquake affected terrain. However, studies evaluating the potential effects of both landslide triggering factors; rainfall and earthquake have been infrequent despite the rising global landslide mortality risk. The SE Carpathians, which have been subjected to many large historical earthquakes and changing climate and thus resulting in frequent landslides, is one such region that is least explored in this context. Therefore, a massive (~9.1 Mm2) landslide, situated along the Basca Rozilei River, in the Vrancea Seismic Zone, SE Carpathians is chosen as a case study area to achieve the aforesaid objective. The present state of slope reveals the Factor of Safety in a range of 1.17–1.32 with a static condition displacement of 0.4–4 m that reaches up to 8–60 m under dynamic (earthquake) condition. The Groundwater (GW) effect further decreases the Factor of Safety and increases the displacement. Ground motion amplification enhances the possibility of slope surface deformation and displacements. The debris flow prediction, implying the excessive rainfall effect, reveals a flow having 9.0–26.0 m height and 2.1–3.0 m/sec velocity along the river channel. The predicted extent of potential debris flow is found to follow the trails possibly created by previous debris flow and/or slide events.

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Section: )mentioning

confidence: 87%

Section: )mentioning

confidence: 99%

Evaluating landslide response in seismic and rainfall regime: A case study from the SE Carpathians, Romania

Kumar

Cauchie

Mreyen

et al. 2021

Preprint

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show abstract

“…During floods, rivers in the region carry large quantities of solid materials, causing changes in the transverse and vertical profiles of the canals [8]. As example, if the average annual suspended sediment load of the Vedea Rivera tributary of the Danube upstream of the study areaat Alexandria is only 12.6 kg/s, during major floods (1972, 1975, 1995 and 2005) it exceeded 5000 kg/s.…”

Section: Evolution Of the Islands System Between 1995 And 2009mentioning

confidence: 99%

The Utility of Morphometric Parameters Extracted from SAR Radar Images in the Monitoring of the Dynamics of the Danube Island System, Giurgiu-Călăraşi Sector, Romania

Hachemi¹,

Grécu²,

Ioana-Toroimac³

et al. 2021

IJDNE

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The Danube islands system is continuously undergoing real degradations caused by natural and anthropogenic processes, thus causing a weakening of the biological potential and generating ecological and socio-economic imbalances. The lack of frequent data on the morphometric parameters of the islands in this region constitutes a major gap for monitoring, understanding and diagnosing the state of their evolution. The aim of this work is to show the importance of morphometric parameters extracted from SAR radar amplitude images in the monitoring of the dynamics of the Danube island system, along the Giurgiu-Călăraşi sector, at the frontier of Romania – Bulgaria. This study conducted by extraction of islands allowed us to detect and monitor the evolution of each island and sub-island, between 1995 and 2009, with great precision. The results obtained showed a displacement of the island system in the South-East direction with an average annual velocity of about 1 m/year and sediment accumulations with an average radius velocity estimated at 1.34 m/year during this period of 14 years. The increase of sediment accumulation during the studied period is due to river bank erosion and to the major floods produced in 2005 on the tributary rivers and especially those of 2006 on the Danube River.

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“…It can be explained by the phenomena of the floods produced in the region. During the floods, the rivers in the region carry large quantities of solid materials, causing changes in the transverse and vertical profiles of the canals (Grecu et al 2017). For example, the annual average load of suspended sediment from the Vedea river (a tributary of the Danube upstream of the study area) to Alexandria is only 12.6 kg/s, while during major floods (1972, 1975, 1995 and 2005), it exceeded 5000 kg/s.…”

Section: Evolution Of the Island System Between 1995 And 2010mentioning

confidence: 99%

The diachronic analysis of island dynamics along the Vedea-Oltenița Danube river sector using SAR imagery

Hachemi¹,

Grécu

Ioana-Toroimac

et al. 2020

Med. Geosc. Rev.

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Floods and Flash-Floods Related to River Channel Dynamics

Cited by 18 publications

References 17 publications

Evaluating landslide response in seismic and rainfall regime: A case study from the SE Carpathians, Romania

Evaluating landslide response in seismic and rainfall regime: A case study from the SE Carpathians, Romania

The Utility of Morphometric Parameters Extracted from SAR Radar Images in the Monitoring of the Dynamics of the Danube Island System, Giurgiu-Călăraşi Sector, Romania

The diachronic analysis of island dynamics along the Vedea-Oltenița Danube river sector using SAR imagery

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