Implementation and monitoring of soil bioengineering measures at a landslide in the Middle Mountains of Nepal.

摘要

Soil bioengineering is an appropriate approach to deal with erosion problems and shallow seated landslides especially in developing countries such as Nepal. This technique is a cost-effective solution using locally available materials and low-cost labour. Furthermore, this approach allows the involvement of the local population in the management and maintenance aspects. As an example for prevention of soil erosion and increased slope stability by means of vegetation, a landslide in the Middle Mountains of Nepal was selected for an innovative approach of rescheduling the implementation of soil bioengineering stabilisation works into the dry, winter season, testing plants for their suitability and using cut bamboo (Bambusa nutans G. C. Wall.) for the construction of vegetated crib walls. This paper deals with investigation, design, construction and monitoring over a period of 32 months. Soil bioengineering solutions for erosion control and shallow slope instabilities in the Middle Mountains proved to be highly successful and all plants, in particular Salix tetrasperma Roxb. and Alnus nepalensis Don., seemed to be suitable for winter plantation..