A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Predictive Scheme for Failures of Embankment Dams with High Overtopping Potential: Case Studies Using Remote Sensing Data
Monitoring the behaviors of dams or levees built using embankments during construction and in operation is an important task which demands the pooling of information in many fields. Among the different factors leading up to an embankment failure by breaching, overtopping is one of the important dynamic factors. An overtopping occurs when a reservoir level reaches the crest of an embankment dam where water can either flow inside the dam body or over the downstream shells. Depending on the permeability of the dam’s materials, the severity of overtopping and erosion is different. When the reservoir level is at near-overtopping level, the water content of permeable materials is raised and the effective stress decreases. The probability of cracks occurring increases as shear stresses between different layers or zones of fill materials used in embankment construction become overwhelming due to the decreasing effective stresses. By monitoring the various physical changes of the embankments surfaces, either in-situ or remotely, for a few embankment failure sites, a prediction scheme is being developed. The prediction scheme depends on correlating certain traceable physical changes such as soil moistures and surface reflectance with the behavior of embankments prior to overtopping. The scheme aims to help operators of embankment dams and levees to locate potential breaching failures induced by relatively high water level behind the embankments. Remote sensing data from NASA plays a key role in providing the background estimations. Parameterizing the uncertainties forms a major part of the research effort.
Predictive Scheme for Failures of Embankment Dams with High Overtopping Potential: Case Studies Using Remote Sensing Data
Monitoring the behaviors of dams or levees built using embankments during construction and in operation is an important task which demands the pooling of information in many fields. Among the different factors leading up to an embankment failure by breaching, overtopping is one of the important dynamic factors. An overtopping occurs when a reservoir level reaches the crest of an embankment dam where water can either flow inside the dam body or over the downstream shells. Depending on the permeability of the dam’s materials, the severity of overtopping and erosion is different. When the reservoir level is at near-overtopping level, the water content of permeable materials is raised and the effective stress decreases. The probability of cracks occurring increases as shear stresses between different layers or zones of fill materials used in embankment construction become overwhelming due to the decreasing effective stresses. By monitoring the various physical changes of the embankments surfaces, either in-situ or remotely, for a few embankment failure sites, a prediction scheme is being developed. The prediction scheme depends on correlating certain traceable physical changes such as soil moistures and surface reflectance with the behavior of embankments prior to overtopping. The scheme aims to help operators of embankment dams and levees to locate potential breaching failures induced by relatively high water level behind the embankments. Remote sensing data from NASA plays a key role in providing the background estimations. Parameterizing the uncertainties forms a major part of the research effort.
Predictive Scheme for Failures of Embankment Dams with High Overtopping Potential: Case Studies Using Remote Sensing Data
Shoghli, Bahareh (author) / Lim, Yeo Howe (author)
World Environmental and Water Resources Congress 2015 ; 2015 ; Austin, TX
2015-05-15
Conference paper
Electronic Resource
English
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