The muddy river. The river turns muddy once it enters
the middle reaches which drain the loess plateau.
The top picture shows the river near Hekouzhen
in Inner Mongolia, which marks the beginning of
the middle reaches. The river picks up more and more
of the sediment as it flows down the gorge section
between Shanxi and Shaanxi provinces.
The sediment load is at its peak during flood flow,
as shown in the bottom picture, while the river is
also turning violent.
