A tributary is a stream or river that flows into a larger stream or river, or a lake. It does not flow into an ocean or sea directly. In this context, the Suav river is a tributary of the Rapti River, meaning it contributes its water to the Rapti.

A grassland ecosystem characterized by grasses and scattered trees, typically found in tropical or subtropical regions with distinct wet and dry seasons. It supports a diverse range of wildlife.

A semi-arid transitional zone in Africa, located between the Sahara Desert to the north and the Sudanian Savanna to the south. It is characterized by its dry climate and sparse vegetation, often facing desertification.