not stagnant, fed by springs (о пруде)
проточн|ый -
1. flowing, running
~ая вода flowing water
2. (не со стоячей водой) well-drained, spring-fed
~ пруд well-drained pond
Большой русско-английский словарь
ПРОТОЧНЫЙ
прил. flowing, running (о воде)
not stagnant, fed by springs (о пруде)
not stagnant, fed by springs (о пруде)