Insufficient water quality due to a nutrient overkill.

Decaying organic matter combined with upstream sediment formation is gradually closing off slow-flowing waterways. The resulting layer, which consists of organic material and fine sediment, reduces hydraulic capacity and is extremely rich in phosphate, which causes the eutrophication of waterways.

MUDTRAP is a series of specially designed troughs used to collect floating sediment particles before they settle on the water bed. These particles are pumped to a sludge dewatering container on the banks, which filters the sludge and allows the water to flow back to the stream.

• Regular dredging is no longer necessary