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Long-term hydrology modelling and analysis in a data limited small catchment in the wet-dry tropics of Australia

2003; Taylor & Francis; Volume: 7; Issue: 2 Linguagem: Inglês

10.1080/13241583.2003.11465230

2204-227X

Guy Boggs, D. R. Moliere, K. G. Evans, Christopher Devonport,

Geophysics and Gravity Measurements

The Ngarradj catchment in the Northern Territory of Australia has high temporal resolution rainfall and runoff data from 1998 to 2002. These data have been used to calibrate the DistFW and HEC-HMS hydrology models. The ability of HEC-HMS to be calibrated using an extended hydrograph provided a better basis for long-term modelling. The calibrated HEC-HMS model was applied to 20 years of rainfall from within the region, providing a more reliable estimate of flood frequencies of higher magnitudes (> 1 in 5 year events). However, before undertaking this type of analysis, the modeller must have a good understanding of the catchment system and the limitations of the chosen hydrology model.