Key Findings

Many researchers and hydrologists have fixed ideas about the impact of changes in land use and management. This project has therefore aimed to rely on the data to inform on impacts rather than making assumptions.

The following conclusions were drawn from the data:

  • The hydrological response of the Hodder catchment is simple and flashy (i.e. simple in that it can be modelled accurately using a simple model).
  • Peak discharge depends strongly on rainfall and drained area.
  • There is strong inherent scaling with area – using a scale equation that depends solely on the total land area drained to the various flow gauges, it was found that if the peak discharge for a storm event is known at one gauge then good estimates can immediately be made for the peak discharges at all the other gauges
  • There are complex time-varying spatial patterns associated with the impact that changes in land use/management have on the flood response
  • The Hodder flood response appears to show a strong, simple sensitivity to variability in the weather but weak, complex sensitivity to changes in land use/management.

There were a number of data limitations, however. For instance as the monitoring period was short, it proved difficult to identify any significant changes in the hydrological regime of the catchment pre and post-ScaMP. This would have required a much longer monitoring period.

It is expected that further work to investigate impact of the SCaMP works on flood hazard will use the data captured in the Electronic Project Record in combination with new models and methods.

Document last modified: Fri Feb 20 2015 11:12:34 GMT Standard Time