ri·par·i·an /rɪˈpɛəriən, raɪ-/

1. of, pertaining to, or situated or dwelling on the bank of a river or other body of water: riparian villas.

2. Law . a person who owns land on the bank of a natural watercourse or body of water.

1840–50; < L
rīpāri ( us ) that frequents riverbanks ( rīp ( a ) bank of a river + –ārius -ary) + -an

—Related forms
adjective, noun

Source: Dictionary.com.

The northern border between Korea and China formed by the Yalu and Tumen rivers has been recognized by the world for centuries, much longer than comparable borders in Europe, and so one might think these rivers always constituted Korea’s northern limits. In fact, Koreans ranged far beyond these rivers, well into northeastern China and Siberia, and neither Koreans nor the ancient tribes that occupied the plains of Manchuria considered these riparian borders to be sacrosanct.

Source: Korea’s Place in the Sun by Bruce Cumings.