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

3 Sep 2019 KDKH
The KDKH’s transboundary working group to study impacts of GLOF events in the Koshi basin

In June 2019, a study that used declassified military satellite data showed that a staggering

27 Jul 2015 HKPL
National Technical Consultation Meeting in Pakistan

ICIMOD, in collaboration with thegovernment of Kyber Pakhtunkhawa, hosted a National Technical Consultation meeting — Karakoram-Pamir-Wakhan Transboundary Conservation and Development ...

21 Mar 2019 Gender in Koshi
Transforming gender and social perceptions in the brick industry

With rapid urbanization and demand for construction materials in Nepal, brick kilns have proliferated across the country, providing livelihoods to ...

Community Participation a Precursor to Sustainable Development and Effective Climate Actions

“There are unprecedented challenges to achieving three goals at a time: poverty reduction, climate resilience, and Sustainable Development Goals (SDGs)”, ...

17 Feb 2015 News
Improving Water Management through Satellite Remote Sensing Applications

At the inaugural session, Kamran Ali Qureshi, Federal Secretary at the Ministry of Science and Technology, emphasized ...

1 Sep 2016 KSL
KSLCDI Partners Come Together to Evaluate Activities at Annual Review and Planning Workshop

The annual ‘Regional Review and Annual Planning Workshop for the year 2016 and 2017’ on Kailash Sacred Landscape Conservation and ...

3 May 2016 Himalica
Farmers Learn Modern Beekeeping

Beekeeping with Apis cerana is a common practice among the pilot households in Taplejung district of Nepal. Over one-third of the households ...

Leveraging Collaboration for Disaster Risk Reduction in the Koshi Basin

Scientists, practitioners, and decision makers working in the Koshi Basin reached consensus on the need to further strengthen regional collaboration ...