Back to news
30 May 2017 | News

Soil Erosion a Serious Concern in the Koshi Basin

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

70% Complete

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.

Stay current

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.

Sign Up

Related content

Continue exploring this topic

25 May 2019 News
In conversation with a climate leader

Bhandari has been engaged in climate action and activism since 2013, working with youth groups and organizations. She has been ...

28 Dec 2018 News
ICIMOD receives Global Outstanding Achievement Award 2018

The Transboundary Landscape Programme facilitates cooperation based on shared ecosystems between countries and has fostered partnerships with over 55 government ...

9 Dec 2016 News
Communities Develop Demonstrable Agroforestry Systems with Poulownia Plantation in Sushare Gaun, Gorkha, Nepal

Agroforestry is practiced in both tropical and temperate regions where it produces food, fiber and biomass energy, contributes to food ...

24 Jan 2018 Cryosphere
Cryosphere Initiative field activities for the autumn 2017

Thana glacier, Bhutan In Bhutan, Sharad Joshi, Associate Glaciologist and two glaciologists from the Bavarian Academy of Sciences and Humanities, Germany, ...

26 May 2015 News
Scoping REDD+ site in Myanmar

Part I: Kabani, Bagan On 26 March 2015, Thursday, an ICIMOD team comprising REDD+ Initiative Coordinator Bhaskar Karky and Communications Specialist ...

Kangchenjunga Landscape Conservation and Development Initiative (KLCDI) Pilot Implementation Phase Underway

The G B Pant National Institute of Himalayan Environment & Sustainable Development, (GBPNIHESD), the Indian nodal organisation with support from ...

18 Dec 2015 News
National Experts’ Symposium on Ecosystem Based Adaptation in Pakistan

  ICIMOD, in collaboration with the Mountain Agricultural Research Centre and WWF-Pakistan, organized a two-day ‘National Experts’ Symposium on Ecosystem Based ...

11 Sep 2013 HICAP
Valuating ecosystem services in Koshi River Basin

A joint research team from CICERO, GRID-Arendal, ICIMOD, and other partners within ...