Kathmandu, the capital city of Nepal, is one of the most populated and rapidly growing cities in South Asia. With its rapid urbanization and increasing population, the city is facing a significant waste management problem. The waste scenario of Kathmandu is a complex issue, which involves not only the collection and disposal of waste but also the management of its environmental impacts, including greenhouse gas emissions.

Waste collected from Kathmandu Valley

Waste Generation and Collection

According to a study conducted by the Daayitwa (https://www.daayitwa.org/storage/archives/1582196713.pdf) and Kathmandu Post (https://kathmandupost.com/valley/2021/04/16/how-kathmandu-s-waste-management-emerged-as-a-perennial-problem), Kathmandu generates approximately 1200 metric tons (85-120 dump trucks) of solid waste, of which 50 percent comes from the Kathmandu Metropolitan City alone. . However, the waste collection system is not efficient, and the actual collection rate is much lower than the total waste generated.

Waste Disposal

The waste collected from the city is disposed of in open dumpsites located on the outskirts of the city. These dumpsites are poorly managed, and the waste is left untreated, leading to environmental and health hazards. Moreover, these dumpsites are not properly lined, and the leachate from the waste pollutes the groundwater and nearby rivers.

Greenhouse Gas Emissions

The disposal of waste in open dumpsites is a significant source of greenhouse gas emissions, particularly methane. Methane is a potent greenhouse gas with a global warming potential 28 times higher than carbon dioxide over a 100-year timescale. The waste generated in Kathmandu produces approximately 406,000 metric tons of carbon dioxide equivalent (CO2e) emissions annually. Around 74% of these emissions are due to methane released during the decomposition of organic waste in the dumpsites.

Solutions

The waste scenario of Kathmandu requires a comprehensive and sustainable waste management system. The KMC mayor Balen Shah has proposed various solutions, including the construction of new waste treatment plants, the implementation of waste segregation at the source, and the promotion of recycling and composting. However, these solutions require significant investments, technical expertise, and public participation.

Conclusion

The waste scenario of Kathmandu is a significant challenge for the city's development and sustainability. The inefficient waste collection and disposal system, coupled with the uncontrolled methane emissions from the dumpsites, pose a threat to the environment and public health. To address this challenge, the city needs to adopt a sustainable waste management system that involves the participation of the public, private sector, and government. This system should prioritize waste reduction, recycling, and composting, while minimizing the amount of waste sent to the dumpsites