Mapping of uplift hazard due to rising groundwater level during floods

Abstract

European Directive 2007/60/EC only briefly mentions the problem of hazard arising due to groundwater flooding, and techniques for the mapping of hazard occuring due to rising groundwater have not yet been scientifically developed. The groundwater-related threats that occur during floods may include concentrated leakage of groundwater behind levees, heave, or potential uplift of the topsoil layer at the protected area. The hazard corresponding to rising groundwater level depends on a number of factors related to the flood course, groundwater regime, geology, and topology of the protected area. The limit state approach is applied to the assessment and mapping of hazard induced by rising groundwater level in the area behind flood protection barriers, and the contributing factors are discussed, quantified, and incorporated into the limit state condition for topsoil layer uplift (UPL). An over-design factor is expressed as a function of the spatial coordinates (x, y). Data from geological and hydrogeological surveys and groundwater flow modelling are used to evaluate individual terms in the limit state condition. Uncertainties in the input data are expressed via partial factors. Data collection and their geographic information systems analysis completed with hydraulic modelling are crucial techniques in the hazard mapping of potential UPL during floods. The article includes a case study featuring a flood protection scheme for a shopping centre in the city of Brno, Czech Republic.

Possibilities of Applying Multivariable Regression in Groundwater Data Series along a Riverbank Area

“…Researchers work on providing a comprehensive and logical approach for identifying, understanding, and evaluating the key factors and processes controlling groundwater-surface water interactions and understanding their relationship to environmental problems (Conant et al, 2019). The unknown effects of this relationship can also be dangerous to humans in that groundwater-related threats that occur during floods may include the concentrated leakage of groundwater behind levees and the heaving or potential uplift of the topsoil layer at the protected area (Julínek et al, 2020).…”

Spatial Variability of Groundwater Quality for Freshwater Production in a Semi-Arid Area

“…One of the main problems in assessing groundwater quality is the impossibility of sampling from all locations [19]. One of the appropriate solutions in spatial analysis of Water 2021, 13, 3024 2 of 16 environmental data is the use of interpolation methods, called geostatistics in GIS [1,[20][21][22]. Kriging is one of the best geostatistical methods that uses semi-variogram information to estimate variables in non-sampled points [20,21].…”

Flood-Prone Area Delineation in Urban Subbasins Based on Stream Ordering: Culiacan Urban Basin as a Study Case

“…From flood risk assessment, flood hazard maps could be generated. Unfortunately, the generation of flood hazard maps is a multi-criterial and complex issue [13,14]. Different approaches based on GIS hazard maps [15], flood frequency [16], flood depth and velocity [17], and remote sensing techniques [18], among others, have been proposed worldwide.…”