Figure 1
A figure showing;
the oberserved flood hydrograph during the 2000 flood event (black).
the simulated flood hydrograph using a 30mm/day time map with no interventions(red)
the simulated flood hydrograph using a 30mm/day time map with a CRIM added along reach 127 (blue).
The figure shows how increasing the channel and floodplain roughness at reach 127 results in a decrease in flood peak of just over 3 cumecs (m3/s)
Important to note;
The observed hydrograph is taken from the Isfield gauge downstream of Uckfield, whereas the two simulated hydrographs produce hydrographs predicted for an areas just upstream of Uckfield. This will lead to a slightly greater difference between simulated and observed hydrographs