Assessment of Dukan Landslides, West of Sulaimani City, the Kurdistan Region, Northeast Iraq
DOI:
https://doi.org/10.25079/ukhjse.v2n1y2018.pp28-38Keywords:
Iraq, Kurdista Region, Landslide, Man-made hazard, Plane slide, Road cutAbstract
Four landslides of different sizes had occurred in 2012 along the main paved road between Dukan – Surdash. The landslides are within the Kometan Formation, which consist mainly of well bedded and jointed marly limestone. The landslides are located in a narrow syncline trending NW – SE in between Khalikan and Kalo anticlines. The main reason of the landslides is the haphazard road cuts during the road construction and widening of the road latter on. Another reason that had accelerated the landslide is the fluctuation of water level in Dukan reservoir. The water level reaches the down slope area of the landslides. Satellite imagery was used to study the parameters of the landslides and have performed a field work to confirm the acquired parameters and deduced other indications of the landslides, besides checking their stability. Landslide Possibility Study was performed using Landslide Possibility Index at each landslide area and have found that the whole area is unstable showing High possibility of re-failure. Sereographic presentation for the three landslides was used to show the relation between bedding and joint planes as well the road cuts trends. It was concluded that in next rainy season, the whole area may form a severe geological hazard if necessary precautions are not considered. Therefore, urgent precautions were recommended to keep the slopes alongside the road cur as stable as possible.
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