This site uses cookies, as explained in our terms of use. If you consent, please close this message and continue to use this site.
The high rate at which soil erosion is taking place in the Koshi Basin of Nepal is a serious concern. Soil erosion impacts not just the fertility of agricultural lands negatively, but also the habitats of fish and other species by causing sedimentation in streams and rivers, and clogging waterways.
The entire Koshi Basin in Nepal lost an estimated 40 million tonnes of soil between1990 and 2010, according to a study conducted by the Koshi Basin Programme at the International Centre for Integrated Mountain Development (ICIMOD) (http://journals.plos.org/plosone/article/comments?id=10.1371/journal.pone.0150494). The study, supported by the Australian Government’s Department of Foreign Aid and Trade (DFAT) through Sustainable Development Investment Portfolio (SDIP), made efforts to fill the information gap on erosion patterns and dynamics from 1990 to 2010 using geospatial technology.
1 min Read
Published in 2016, the study showed that the soil loss rate estimated was 22 million tonnes per hectare of barren land per year, with 18 million tonnes in 1990 and 15 million tonnes in 2010. In addition, the total soil loss from agricultural land was estimated to be 10 million tonnes in 1990 and 14 million tonnes in 2010. An estimated 39 million tonnes of soil was lost in 1990 and 42 million tonnes in 2010.
Identifying soil loss areas is crucial for planning effective interventions at the ground level in the most erosion-affected areas. Erosion priority areas can be determined for planning and implementing conservation measures and erosion management in Nepal, where there is huge loss of arable land due to soil erosion.
Land cover management approaches such as gully plugging, afforestation of degraded land, improving infiltration through construction of pits, and crop management for vegetation cover, among others, can be implemented in fields on hillslopes, or at the watershed scale in the future.
Studies have shown land degradation, sedimentation, and ecological degradation tend to increase as a result of inappropriate land use and management practices. Soil erosion is contributing to substantial changes in basin hydrology and inundation in the transboundary Himalayan river basins.
Initiatives are needed to help increase awareness among farmers and are crucial to identifying the best options for farming practices to reduce soil loss from cultivated land and provide support for the implementation of appropriate measures.
Share
Stay up to date on what’s happening around the HKH with our most recent publications and find out how you can help by subscribing to our mailing list.
Related content
Effective management of river basins for multiple benefits, such as the availability of water for domestic use, agriculture, and energy, ...
In his welcome remarks, Basanta Shrestha, Director of Strategic Cooperation at the International Centre for Integrated Mountain Development (ICIMOD), emphasized ...
Hydropower generation is a viable base upon which economies could flourish in the Hindu Kush Himalayan (HKH) region, but excessive ...
On 29 October 2018, glaciologists from three poles of the globe came together to discuss their research and explore new ...
Himalayan countries can look to the Arctic Council, Alpine Convention and the Carpathian Convention to build multilateral cooperation mechanisms, advises ...
It is difficult to think of a resource more essential to the wellbeing of people and their economies than water, ...
The International Centre for Integrated Mountain Development (ICIMOD) was profiled by TWAS (The World Academy of Sciences for the advancement of ...
While celebrating International Mountain Day on 11 December 2017, ICIMOD announced the four winners of this year’s ICT for Mountain ...