influent
adjective
[ ˈɪnflʊənt ]
• flowing in.
• "some particles delivered in the influent streams settle in the reservoirs"
influent
noun
• a stream, especially a tributary, which flows into another stream or lake.
Origin:
late Middle English (as an adjective): from Latin influent- ‘flowing in’, from influere (see influence). The noun is recorded from the mid 19th century.