The question is, how does the water flow from the creek above, to the springs below. Combined with the fact that the creek seems to get smaller as it flows downstream, I suspect it means that there are other sinkholes and geological channels through the bedrock, that are feeding these springs. All of these springs and the streams below them flow year round, not just during the spring flood.
For anyone wondering what 'karst' geology is, this diagram from the excellent book A Guide to the Geology and Landforms of Grey and Bruce Counties, helps explain it. The dolostone layer here, the Amabel Formation, is porous, with cracks in the rock which let water flow through, so streams disappear into sinkholes before they get the chance to flow over the edge of the cliff. But the Cabot Head Shale is impermeable, so water does not flow through it; instead it flows along the top of that formation, and out to the slope where it forms a spring. '
Karst' geology refers to a landscape where soluble rocks such as limestone or dolomite (as here), enable drainage into sinkholes, limiting drainage on the surface. Normally there are springs at a lower level associated with the sinkholes.
Hope you've enjoyed my tour of all the features of Kimberley Forest, including the amazing Wodehouse Karst.