low-lying region; lowland; basal zone
Geographical term for an area of low elevation, often used in contrast to highlands or mountainous zones. 'Basal zone' is a technical ecological term.
This low-lying region has a high risk of flooding.
Wetlands spread across the lowland.
Compound of 低 (low) + 地 (land) + 帯 (zone, belt). The exact historical derivation is uncertain, but the word follows standard Sino-Japanese compounding patterns.