The low-flow channel was constructed as a flat-bottomed base, lined and edged with loose river cobbles (see Figure 9.3). The design does not allow for maintenance activities like dredging sediment, and it was intended for sediment to settle on the river bed. Sedimentation occurred rapidly during the first year, partially covering sections of the boulders. Limited planting was carried out in sedimented areas. Five gabion weirs, with scour-protective Reno mattress were constructed in different sections of the river, where they acted as energy dissipaters (see Figure 9.1). Gabions were also installed in steep sections of the high-flow channel (especially along bends in the river course), where spatial constraints prevented adequate widening and sloping of upper banks. The high-flow channel (see Figure 9.4) had a flattened base, elevated some 0.5m above the low-flow channel and edged, on the water side, by piled river cobbles, inclining up into steeply sloped banks (ca 1:3 to 1:4). In areas where open space was constricted, stepped gabions were used on the banks instead of the flattened earth base.