Journal - Application of Morishita Spread Index in the study of landslides from the Kulekhani watershed, central Nepal

Application of Morishita Spread Index in the study of landslides from the Kulekhani watershed, central Nepal

Mahesh Singh Dhar

Department of Civil Engineering, Pulchowk Campus

Tribhuvan University, Nepal

 Megh Raj Dhital

Central Department of Geology

Tribhuvan University, Kathmandu, Nepal

Jour. Nep. Geol. Soc., Vol. 30, 2004, 123-126


Abstract

The Kulekhani watershed was severely affected by sedimentation, landslides, and gully erosion in 1993. The sediments produced were ultimately supplied to the reservoir decreasing its gross storage capacity. A statistical tool, called Morishita Spread Index, was applied to detect the landslide distribution pattern in the watershed. Morishita Spread Index was greater than 1 and decreased with increasing mesh scale. Such a trend indicates a cluster-type of distribution pattern. The landslides are concentrated mainly in the gullies and streams, and there is a high probability that landslides will continue to occur there in the future.

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