Post flooding damage assessment of earth dams and historical reservoirs using non-invasive geophysical techniques

Abstract

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Geophysical Evaluation of the Inner Structure of a Historical Earth-Filled Dam

“…The geophysical survey did not detect any. Recent studies suggest, that recurrent monitoring of the dams during different soil moisture and water level conditions is needed to observe potential failures [12][13][14]21], even though such an approach is more demanding.…”

“…The modern geophysical surveys, especially combination of different methods, are becoming fast and cheap option for the subsurface inspection [10,11]. The suggested techniques are electrical resistivity tomography (ERT) [12][13][14][15], ground penetrating radar (GPR) [16], electromagnetic methods [17] or rarely also seismic surveys [18]. Most methods were originally designed for prospecting of deep soil horizons or even geological formations.…”

2D-ERT monitoring of soil moisture seasonal behaviour in a river levee: A case study

“…Therefore, geophysical investigations and imaging have been added in many cases to provide high-resolution information of subsurface property changes and stability assessment over long embankment stretch (e.g. Kim et al, 2007;Donohue et al, 2011;Niederleithinger et al, 2012;Perri et al, 2014;Busato et al, 2016;Bièvre et al, 2017;Sentenac et al, 2017).…”

Dam Leakage Detection by Borehole Radar: A Case-History Study

“…In addition, people have investigated the combined use of extensive geotechnical, hydrogeological and geophysical techniques to assess the condition of a small earth dyke with a permanent hydraulic head [18]. Four techniques (GEM2, ERT, Self-Potential and microgravimetry) were used to assess the post flood damage of earth dams [19]. Different methods have different characteristics and detect different physical properties.…”