In occur on the macroforms while those in

In essence all three types of bed forms may not necessarily
occur in all river types as their hierarchy varies in relation to the particle
size of the bed material and mean of the water depth. Macroforms are mostly
prevalent in rivers with gravel beds.  The
bed form configuration should be stable at all times during the floods, as
such, the three groups of bed forms occur mostly in super positions in rivers
that have sand beds.  In such
circumstances, the flow of the mesoforms occur on the macroforms while those in
microforms are partly found on the surfaces of mesoforms.  Hence, the transportation of sandy bed loads
is not merely restricted to the occurrence of large disharchges but in
continuous events which helps in the continuous change of the bed form.  This in turn is advantageous in relation to
the area covered by mesoforms and microforms in decreasing discharges.  The distribution of formation of bed forms is
affected by plant growth e.g. stems and leaves bars the flow which in turn
affects interaction between water and the bare bed.  Vegetation coverage is largely influential in
small rivers and streams as the shallow waters and the low specific stream
water power makes them highly suitable for plants.

Integrated river management is entirely dependent on the
spatio-temporal variations that are experienced in streams and river channel
bed forms.  Bed forms are particularly
important in the determination of flow resistance and the cross-sectional
dimensions which are key in ecological assessments.  Bed forms act as physical habitat for aquatic
macrophytes and the aquatic fauna due to their interaction with water flow and
with channel substrates.  Bed form
diversity helps in determination of their biodiversity mainly due to the fact a
majority of these species that are located in pristine rivers are reliant on
specific conditions that enable their establishment, for the purpose of
feeding, provision of shelter and for reproduction.  In areas where some fauna species are reliant
on different habits with smaller proximities, others are dependent on habitat
characteristics that enable them to change as their lifecycle is adapted to the
pulsing created through water discharge. 
An increase in bed form diversity through space and time is therefore
essential for many rehabilitation projects which are created on streams or
rivers.