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A massive landslide in the Jure village of Sindhupalchowk District, Nepal, occurred on August 2, wiping out dozens of houses and blocking the Sunkoshi River. The spectral element method (SEM) is employed here to study the stability of the slope where the landslide occurred, considering dry and wet slope conditions and pseudo-static seismic loading (with refer to 7.8Mw 2015 Barpak-Gorkha, Nepal earthquake).
Kosi is a transboundary river that links Nepal and India, and the Kosi Basin is a fertile flood plain, with good arable land, and plenty of water and sunshine. It should be a breadbasket for the region, with high agricultural productivities, and good agro-industrial developments. ICIMOD and DFAT choice of the Kosi Basin for a pilot project for water-based regional development could improve the standard of living of the region significantly.
On 2nd August a rainfall-induced massive landslide hit Jure village, Sindhupalchowk killing 156 people at a distance of 70 km North-East of Kathmandu, Nepal. The landslide was a typical slope failure with massive rock fragments, sand and soil. A total of estimated 6 million cubic meters debris raised more than 100 m from the water level and affected opposite side of the bank.
This study has attempted to replicate the flooding and the sedimentation during the 2008 flood by using a numerical model. A two-dimensional morphodynamic model, which can treat the bedload and suspended load transport of non-uniform sediment, has been applied to simulate the flood flow and the sediment transport induced by the levee breach. By using this model, we have investigated how this flood propagates on the floodplain and how much sediment was supplied from the levee breach point.
