In order to limit the risk of internal erosion
in the structure, a contract to modify Hyatt Dam in Oregon, US, has been offered.
The bombing was in spite of a September 2006 report by the US Army Corps of Engineers warning: "In terms of internal erosion
potential of the foundation, Mosul Dam is the most dangerous dam in the world.
Overtopping and accidental leaking, mainly due to internal erosion
, are different technological problems, but the frequently available technology for solving them is the same, so the conference considered them together.
The study by Ann Lesch, entitled Concentrated Power Breeds Corruption, Repression and Resistance, deals with the issue of internal erosion
of Mubarak's regime.
This will prevent condensate from accumulating in the pocket and then passing through the control valve increasing the likelihood of internal erosion
and premature failure.
Department of Energy grant of $210,920 to fund the study of internal erosion
, particle transport and channelization driven by fluid flow.
The topics include the process of internal erosion
in embankment dams and dikes, contact erosion between two soils, concentrated leak erosion, physics of sediment and aeolian transport, characterizing natural cohesive sediments and the water quality of rivers, and sediment transport and morphodynamics in nearshore areas.
Flow through soil pipes results in internal erosion
of the pipes, which may produce gullies by tunnel collapse.
Among the topics are risk analysis of individual landslides in the Three Gorges Reservoir, the simultaneous modeling of internal erosion
and deformation of soil structures, geotechnical properties of zinc and lead mine tailings from Tara Mines in Ireland, pH changes in solidified dredged materials, the rapid drawdown of the water table in layered soil column, and a mathematical model for determining the critical hydraulic gradient in soil piping.
Hard trim materials and a design that diffuses the discharge from the plug and seat and reduces internal flow velocities to minimise internal erosion
further extends valve life.
Army Corps of Engineers decided recently to postpone study of the dam's vulnerability to earthquakes, so that the more immediate threat - a possible break in the dam due to internal erosion
- can be fixed by the end of the year, project manager Mark Dasso said.
Continuing seepage can cause internal erosion
, piping of embankment material, and collapse of the slopes, eventually resulting in dam failure.