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The PDM rainfall-runoff model
| Content Provider | Scilit |
|---|---|
| Author | Moore, R. J. |
| Copyright Year | 2007 |
| Description | The Probability Distributed Model, or PDM, has evolved as a toolkit of model functions that together constitute a lumped rainfall-runoff model capable of representing a variety of catchment-scale hydrological behaviours. Runoff production is represented as a saturation excess runoff process controlled by the absorption capacity (of the canopy, surface and soil) whose variability within the catchment is characterised by a probability density function of chosen form. Soil drainage to groundwater is controlled by the water content in excess of a tension threshold, optionally inhibited by the water content of the receiving groundwater store. Alternatively, a proportional split of runoff to fast (surface storage) and slow (groundwater) pathways can be invoked with no explicit soil drainage function. Recursive solutions to the Horton-Izzard equation are provided for routing flows through these pathways, conveniently considered to yield the surface runoff and baseflow components of the total flow. An alternative routing function employs a transfer function that is discretely-coincident to a cascade of two linear reservoirs in series. For real-time flow forecasting applications, the PDM is complemented by updating methods based on error prediction and state-correction approaches. The PDM has been widely applied throughout the world, both for operational and design purposes. This experience has allowed the PDM to evolve to its current form as a practical toolkit for rainfall-runoff modelling and forecasting. |
| Ending Page | 499 |
| Page Count | 17 |
| Starting Page | 483 |
| e-ISSN | 16077938 |
| DOI | 10.5194/hess-11-483-2007 |
| Journal | Hydrology and Earth System Sciences |
| Issue Number | 1 |
| Volume Number | 11 |
| Language | English |
| Publisher | Copernicus GmbH |
| Publisher Date | 2007-01-17 |
| Access Restriction | Open |
| Subject Keyword | Water Science and Technology Rainfall Runoff Model |
| Content Type | Text |
| Resource Type | Article |
| Subject | Water Science and Technology Earth and Planetary Sciences |
