Armfield Instruction Manual
36
simulate detention reservoirs and it will be found that inverted dustbin lids serve well
so long as they have a small drainage hole made in their centre.
Effect of land drainage on run-off hydrograph
One of the commonly employed methods of improving land drainage is the
construction or renewal of ditch systems. Different model ditch systems can be
constructed on the sand surface in the catchment tank and their effects on the run-off
hydrograph of a standard storm compared.
Results
Description of catchment area and initial channel planform:
Sketch of catchment area:
Time since start of
run
(secs)
Rainfall flow rate
(l/min)
River inlet flow rate
(l/min)
Flow rate over weir
(l/min)
Plot graphs (run-off hydrographs) of run-off flow rate against time since start of
rainfall for each set of data.
Conclusions
Discuss the results obtained in the experiments performed. Describe the shape of
each hydrograph, and comment on the effects of each parameter on the run-off
experienced. Suggest reasons for any deviation from the expected results.
Summary of Contents for S12-MKII
Page 1: ...Advanced Environmental Hydrology System Instruction Manual S12 MKII ISSUE 21 February 2014...
Page 4: ......
Page 8: ...4 Equipment Diagrams Figure 1 Front View of S12 MKII Hydrology System...
Page 9: ...Equipment Diagrams 5 Figure 2 Plan View of S12 MKII Hydrology System...
Page 10: ...Armfield Instruction Manual 6 Figure 3 End View of S12 MKII Hydrology System...
