Water Induced Disaster Mitigation from Watershed Management Perspective in Nepal

Dinesh Pathak

Abstract


Water induced disasters are common phenomenon in the mountainous region of the active Himalayan belt. A watershed should be considered in a holistic manner during the problem identification and proposing the remedial measures. Geology, geomorphology, river morphology, land use, infrastructure development practice, socio-economic condition of the people residing within the watershed are some of the factors to be considered in reducing the water induced disaster in a watershed.

This paper explores the various factors in a watershed that are responsible for water induced disaster and their consideration from watershed management perspective with respect to the Dobhan watershed in Palpa district, west Nepal. It is realized that almost 20% of the watershed area is covered by agriculture land and majority of it is on the sloping terrace. Though more than 65% watershed area is covered by forest, there is significant encroachment leading to degradation of the forest area and natural condition of the forest. Water induced disaster is quite common due to the presence of large number of landslide, bank cutting and sediment transportation.

The study reveals that the Dobhan watershed requires mitigation works for slope stabilization and soil erosion control as there are large number of landslides, bank cutting and gully erosion. The mitigation activities should be integrated with the other watershed management activities like control for forest encroachment, selection of best agriculture practice and protection of water resources to ensure water availability to the people living in the area.

Keywords


Water Induced Disaster; hazard; watershed management; Remote Sensing; GIS

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References


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