scholarly journals Numerical Analysis of Settlement Response of Shallow Footing Subjected to Heavy Rainfall and Flood Events

2021 ◽  
Vol 12 (02) ◽  
pp. 138-158
Author(s):  
Nadarajah Ravichandran ◽  
Tharshikka Vickneswaran ◽  
Siddharth Marathe ◽  
Vishnu Saketh Jella
Keyword(s):  
Numerical Analysis ◽  
Heavy Rainfall ◽  
Flood Events ◽  
Shallow Footing

scholarly journals Extreme Floods in the Eastern Part of Europe: Large-Scale Drivers and Associated Impacts

Water ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1122
Author(s):  
Monica Ionita ◽  
Viorica Nagavciuc
Keyword(s):  
Water Vapor ◽  
Heavy Rainfall ◽  
Large Scale ◽  
Vapor Transport ◽  
Water Vapor Transport ◽  
Flood Events ◽  
Rainfall Events ◽  
Catchment Areas ◽  
Large Scale Atmospheric Circulation ◽  
Heavy Rainfall Events

The role of the large-scale atmospheric circulation in producing heavy rainfall events and floods in the eastern part of Europe, with a special focus on the Siret and Prut catchment areas (Romania), is analyzed in this study. Moreover, a detailed analysis of the socio-economic impacts of the most extreme flood events (e.g., July 2008, June–July 2010, and June 2020) is given. Analysis of the largest flood events indicates that the flood peaks have been preceded up to 6 days in advance by intrusions of high Potential Vorticity (PV) anomalies toward the southeastern part of Europe, persistent cut-off lows over the analyzed region, and increased water vapor transport over the catchment areas of Siret and Prut Rivers. The vertically integrated water vapor transport prior to the flood peak exceeds 300 kg m−1 s−1, leading to heavy rainfall events. We also show that the implementation of the Flood Management Plan in Romania had positive results during the 2020 flood event compared with the other flood events, when the authorities took several precaution measurements that mitigated in a better way the socio-economic impact and risks of the flood event. The results presented in this study offer new insights regarding the importance of large-scale atmospheric circulation and water vapor transport as drivers of extreme flooding in the eastern part of Europe and could lead to a better flood forecast and flood risk management.

scholarly journals NUMERICAL ANALYSIS OF HEAVY RAINFALL IN WESTERN SHIMANE PREFECTURE IN AUGUST, 2013 USING WRF-LETKF

2014 ◽  
Vol 70 (2) ◽  
pp. I_277-I_287
Author(s):  
Masato KITA ◽  
Yoshihisa KAWAHARA ◽  
Ryota TSUBAKI ◽  
Tomoki USHIYAMA
Keyword(s):  
Numerical Analysis ◽  
Heavy Rainfall

scholarly journals Rivers in the sky, flooding on the ground

2020 ◽  
Author(s):  
Monica Ionita ◽  
Viorica Nagavciuc ◽  
Bin Guan
Keyword(s):  
Atmospheric Circulation ◽  
Heavy Rainfall ◽  
Large Scale ◽  
Rhine River ◽  
Flood Events ◽  
Pressure Center ◽  
Atmospheric Rivers ◽  
Extreme Flooding ◽  
Large Scale Atmospheric Circulation ◽  
Lower Rhine

Abstract. The role of the large scale atmospheric circulation and atmospheric rivers (ARs) in producing extreme flooding and heavy rainfall events in the lower part of Rhine River catchment area is examined in this study. Analysis of the largest 10 floods in the lower Rhine, between 1817–2015, indicate that all these extreme flood peaks have been preceded up to 7 days in advance by intense moisture transport from the tropical North Atlantic basin, in the form of narrow bands, also know as atmospheric rivers. The influence of ARs on the Rhine River flood events is done via the prevailing large-scale atmospheric circulation. Most of the ARs associated with these flood events are embedded in the trailing fronts of the extratropical cyclones. The typical large scale atmospheric circulation leading to heavy rainfall and flooding in the lower Rhine is characterized by a low pressure center south of Greenland which migrates towards Europe and a stable high pressure center over the northern part of Africa and southern part of Europe. The days preceding the flood peaks, lower (upper) level convergence (divergence) is observed over the analyzed region, which is an indication of strong vertical motions and heavy rainfall. The results presented in this study offer new insights regarding the importance of tropical moisture transport as driver of extreme flooding in the lower part of Rhine River catchment area and we show for the first time that ARs are an useful tool for the identification of potential damaging floods inland Europe.

scholarly journals Towards a database on societal impact of Mediterranean floods within the framework of the HYMEX project

2013 ◽  
Vol 13 (5) ◽  
pp. 1337-1350 ◽  
Author(s):  
M. C. Llasat ◽  
M. Llasat-Botija ◽  
O. Petrucci ◽  
A. A. Pasqua ◽  
J. Rosselló ◽  
...  
Keyword(s):  
Mediterranean Region ◽  
Heavy Rainfall ◽  
Temporal Distribution ◽  
Balearic Islands ◽  
Societal Impact ◽  
Spatial And Temporal Distribution ◽  
Flood Events ◽  
Database Structure ◽  
Nw Mediterranean ◽  
The Common

Abstract. The NW Mediterranean region experiences every year heavy rainfall and flash floods that occasionally produce catastrophic damages. Less frequent are floods that affect large regions. Although a large number of databases devoted exclusively to floods or considering all kind of natural hazards do exist, usually they only record catastrophic flood events. This paper deals with the new flood database that is being developed within the framework of HYMEX project. Results are focused on four regions representative of the NW sector of Mediterranean Europe: Catalonia, Spain; the Balearic Islands, Spain; Calabria, Italy; and Languedoc-Roussillon, Midi-Pyrénées and PACA, France. The common available 30-yr period starts in 1981 and ends in 2010. The paper shows the database structure and criteria, the comparison with other flood databases, some statistics on spatial and temporal distribution, and an identification of the most important events. The paper also provides a table that includes the date and affected region of all the catastrophic events identified in the regions of study, in order to make this information available for all audiences.

scholarly journals Are Kenya Meteorological Department heavy rainfall advisories useful for forecast-based early action and early preparedness for flooding?

2021 ◽  
Vol 21 (1) ◽  
pp. 261-277
Author(s):  
David MacLeod ◽  
Mary Kilavi ◽  
Emmah Mwangi ◽  
Maurine Ambani ◽  
Michael Osunga ◽  
...  
Keyword(s):  
Heavy Rainfall ◽  
Extreme Event ◽  
Significant Loss ◽  
Flood Events ◽  
Loss Of Life ◽  
Flood Impacts ◽  
Early Action ◽  
The Uk ◽  
Flooding Events ◽  
Source Of Information

Abstract. Preparedness saves lives. Forecasts can help improve preparedness by triggering early actions as part of pre-defined protocols under the Forecast-based Financing (FbF) approach; however it is essential to understand the skill of a forecast before using it as a trigger. In order to support the development of early-action protocols over Kenya, we evaluate the 33 heavy rainfall advisories (HRAs) issued by the Kenya Meteorological Department (KMD) during 2015–2019. The majority of HRAs warn counties which subsequently receive heavy rainfall within the forecast window. We also find a significant improvement in the advisory ability to anticipate flood events over time, with particularly high levels of skill in recent years. For instance actions with a 2-week lifetime based on advisories issued in 2015 and 2016 would have failed to anticipate nearly all recorded flood events in that period, whilst actions in 2019 would have anticipated over 70 % of the instances of flooding at the county level. When compared against the most significant flood events over the period which led to significant loss of life, all three such periods during 2018 and 2019 were preceded by HRAs, and in these cases the advisories accurately warned the specific counties for which significant impacts were recorded. By contrast none of the four significant flooding events in 2015–2017 were preceded by advisories. This step change in skill may be due to developing forecaster experience with synoptic patterns associated with extremes as well as access to new dynamical prediction tools that specifically address extreme event probability; for example, KMD access to the UK Met Office Global Hazard Map was introduced at the end of 2017. Overall we find that KMD HRAs effectively warn of heavy rainfall and flooding and can be a vital source of information for early preparedness. However a lack of spatial detail on flood impacts and broad probability ranges limit their utility for systematic FbF approaches. We conclude with suggestions for making the HRAs more useful for FbF and outline the developing approach to flood forecasting in Kenya.

Sign in / Sign up

Export Citation Format

Share Document