Streams are classified into 3 categories; perennial, intermittent, and ephemeral. Knowing the difference between these three categories can mean the difference in leaving an SMZ or not. Can you match the definitions (A,B,C) to the stream categories listed below? (Hint) All of these stream types are defined in the BMP handbook.
_______ Perennial Stream
_______ Intermittent Stream
_______ Ephemeral Stream
A. Drain that carries water less than 30% of the year and water flow is usually rain-dependent. An SMZ may need to be left but is not always necessary.
B. A stream that flows 90% of the year or more in a continuous, well-defined channel. An SMZ should be left.
C. A stream that flows 30-90% of the year in a continuous, well-defined channel. An SMZ should be left.
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