and Losing Streams
Managing Karst Watercourses
This lesson will concentrate on the management of sinking/losing
streams and sinking watercourses. But before moving on,
you should understand
how “stream” is defined, and how this definition relates to karst
What is a stream?
Since 1995, the British Columbia government has defined a “stream” as a watercourse with a continuous channel of more than 100 metres
in length that exhibits evidence of scouring or alluvial deposition.
Are all karst water systems streams?
While this definition can be applied to many of the surface streams
flowing on karst terrain, some important watercourses that sink
into the subsurface have the potential to be interpreted as non-classified
they do not meet all the requirements of the definition for a stream.
For example, stream segments that fail to meet the 100-metre distance
However, even though these types of watercourses do not meet the
definition for a stream, they should still be recognized and managed
appropriately in cases where they flow into significant recipient
karst features. To account for this situation, and to avoid confusion
with the accepted definition for a stream, watercourses of this
type are referred to as “sinking