Keywords : Mosul Dam

Seismicity of Mosul Dam Reservoir for the Monitoring Year 1990

Nabeel H. Al-Saigh

Iraqi National Journal of Earth Sciences, 2012, Volume 12, Issue 1, Pages 17-22

Seismic activity has been studied at Mosul dam reservoir for the period January to 20th July 1990. 33 micro-earthquakes of magnitude up to 3 ML were located. Nearly all earthquake epicenters were located within a radius of less than 25 km from the dam site. All the hypocenters, except one, were located at depth less than 2km from the lake's surface, which means there is no change occurred in the seismicity behavior from the previous monitoring period March 1986 to end of December 1987.

The Investigation of Subsurface Channels in the Western Part of Mosul Dam by Seismic Refraction

Bashar A. Al-Juraisy; Nabil H. Al-Saigh

Iraqi National Journal of Earth Sciences, 2010, Volume 10, Issue 1, Pages 81-90

Fourteen seismic refraction traverses with a total length of (3255) m were distributed in the nearby area of the western part of Mosul dam in its downstream side. The aim of the survey is to investigate the possibility of presence of shallow subsurface channels that led to the formation of five sinkholes in the area and to establish the source of the channels' water.
The survey indicates the possibility of the presence of a shallow subsurface channel. The depth of the upper part of this channel ranges between (2 and 5) m below the ground surface. The shape of this channel represents a curved line bends across the western end of the dam body and joined the five sinkholes. The study showed that the source of the water is Mosul Dam Lake, where the landing boat area represents the main water intake and discharge to the Tigris River in the downstream side of the dam causing many sinkholes in the area.