Figure 6. Backwater extents of flume runs with visual of inundation extents for a) multiple jams at high flow, b) logjam with low permeability at high flow, c) logjam with high permeabiltiy at high flow, and d) backwater mapping for single jam flume runs; Q indicates flow and K indicates hydraulic conductivity (permeability). Backwater extent is greater as permeability is decreased and as the longitudinal distribution density is increased. When comparing the backwaters of a single logjam, the greatest backwater corresponds with a low permeability jam at high flow. The smallest backwater extent corresponds with a high permeability jam at low flow.