Study of Dam-break Due to Overtopping of Four Small Dams in the Czech Republic

Alhasan, Zakaraya; Jandora, Jan; Říha, Jaromír

doi:10.11118/actaun201563030717

Cited by 23 publications

(17 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Breach mechanism is classified as following: hydraulic failure, geo-hydraulic failure and global static failure, [20]. Hydraulic failure generally consists on overtopping [21] and wave scour on the dike structure, while geo-hydraulic failure is due to the seepage process through the dike core or foundation, which leads into the erosion process associated with transportation of significant materials amount. Whereas concerning to the type of breach mechanisms, if two aforementioned types are induced mainly from pressure forces as ice, water, and wind waves, while the third type of breach mechanisms (i.e.…”

Section: Dike Breaching Mechanismsmentioning

confidence: 99%

Investigation of seepage effect on river dike’s stability under steady state and transient conditions

Kuriqi¹,

Ardıçlıoğlu²,

Muceku³

2016

Pollack Periodica

View full text Add to dashboard Cite

World experiences reveal that catastrophic floods are posing a serious threat that comes not only from them as extreme events but also as the result of adaptation measures uncertainty, (i.e. dikes). In particularly old dikes constructed earliest at the north part of Albania, during the last floods demonstrated the high uncertainty and weak spots. In this paper, the significance of the seepage investigation and stability analysis are discussed. As a case study, parts of new dikes constructed last years along the Buna River located in north part of Albania are investigated. Filling materials for these dikes are represented mostly from silt and clay. Finite element method is used to perform seepage analysis while general limit equilibrium method is used to perform slope stability analysis. Both, seepage and slope stability analyses are done for three different scenarios: steady state, rapid filling, and rapid drawdown. Finally, it is concluded that silt-clay material used in these dike structure is posing serious uncertainty during seepage phenomenon by threatening the stability of entire dike structure especially during the transient condition (rapid filling and drawdown).

show abstract

Section: Dike Breaching Mechanismsmentioning

confidence: 99%

Investigation of seepage effect on river dike’s stability under steady state and transient conditions

Kuriqi¹,

Ardıçlıoğlu²,

Muceku³

2016

Pollack Periodica

View full text Add to dashboard Cite

show abstract

“…There is usually more than one cause of the total failure of a structure like this. In this simulated case the reasons are a flood wave with parameters higher than the design flood wave and with the return period of more than 100 years and also the defective construction of the dam itself [26], [27]. The HEC-RAS software offers two types of failure mode -overtopping or piping.…”

Section: Modeling Of Unusual Flood Situations At Detention Reservoirsmentioning

confidence: 99%

Flash flood mitigation modeling — case study small Carpathians

Janík¹,

Šoltész²

2017

Pollack Periodica

View full text Add to dashboard Cite

Flash floods are becoming a phenomenon that troubles people more and more often in many Slovak under-mountain regions and society needs to deal with these extreme natural events. This article is showing an example of mathematical modeling of flood protection measures in Small Carpathians region. To secure flood protection, detention reservoirs have been proposed, because of their automatic function that is important due to rapid progress of flash floods. As a base for this project a previous work that attempted to reconstruct the flood has been used. HEC-RAS 4.1.0 software package was used for numerical modeling, which includes flood mitigation calculation. Six variants of proposed detention reservoirs were created and checked by a design flood wave that was created according to rainfall with recurrence period of 100 years. All of the proposed detention reservoirs have exact proportions needed to secure flood protection including height of the dam, length of the dam in crest, type and dimension of outlet and dimensions of emergency spillways. The modeling included flood wave passing during several situations-normal function of detention reservoirs, blocked outlet and dam break. This study should be considered as a base for future flood protection project. An extensive terrain survey has been performed in frame of this project.

show abstract

“…Unfortunately assumption of the full protection for this type of structure is almost impossible because there is always a risk, even if a very small one. It is associated with the occurrence of phenomena such as overflowing, internal erosion or sabotage [1].…”

Section: Introductionmentioning

confidence: 99%

“…In general, the causes of dike failures can be divided into three groups: the loss of stability (shearing failure along the sliding surface or cracking due to settlement), erosion, damage caused by water and overflowing. The statistics published in [1] showed that occurrence of the overflow caused approximately 40% of all dike failures. A number of authors have studied the mechanism of dike failures due to overflowing [2,3,4,5,6,7,8].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulations of overflow experiments on a model dike

et al. 2019

View full text Add to dashboard Cite

Dike failure due to overtopping is one of the important factors, which should be considered in the dike designing process. Although the overflow is characterized by the relatively low risk of occurrence, in many cases dikes are totally destroyed or seriously damaged. An interesting phenomenon occurring during overflow is the trapping of air in pores of the unsaturated soil material. As the infiltration progresses from all sides, the air pressure in the unsaturated region increases, which may ultimately lead to damage of the dike structure. It happens when the air is expulsed in form of bursts and forms large macropores. Such a behaviour evidenced in laboratory experiments. In this study we attempt to simulate the evolution of stress field in the model dike subjected to overtopping. The results are in qualitative agreement with observations, showing that formation of the first macropores occurs in the direction perpendicular to the minor principal stress in the soil mass along the dike slope edge.

show abstract

Study of Dam-break Due to Overtopping of Four Small Dams in the Czech Republic

Cited by 23 publications

References 12 publications

Investigation of seepage effect on river dike’s stability under steady state and transient conditions

Investigation of seepage effect on river dike’s stability under steady state and transient conditions

Flash flood mitigation modeling — case study small Carpathians

Numerical simulations of overflow experiments on a model dike

Contact Info

Product

Resources

About