riparian

 
Pronunciation: /rʌɪˈpɛːrɪən/

adjective

chiefly Law
  • relating to or situated on the banks of a river: all the riparian states must sign an agreement
  • Ecology relating to wetlands adjacent to rivers and streams: the ranch’s most expansive riparian habitat

Origin:

mid 19th century: from Latin riparius (from ripa 'bank') + -an