ABSTRACT
Sediment transport has to be understood at watershed scale to design a smart sediment management. A relevant analysis needs a field data collection at numerous locations and over several years. In Walloon waterways, suspended-load concentration and turbidity are measured with automatic samplers to cover three streams. The solid discharge is monitored in River Haine, a Scheldt river tributary, which is partially diverted into the Canal du Centre waterway. The results show the efficiency of a settling basin in Obourg. The impact of a change in basin land management applied for 20 years is also confirmed to be efficient: the mean annual solid supply has been decreasing at the Hensies outlet and is shown to be strongly correlated to the maximum water discharge. Stations are also located in the Sambre waterway, a Meuse river tributary. around the industrial area of Charleroi and the confluence with a main tributary, to check the influence of these potential sediment sources.
