Abstract
Sediment transport in rill flows exhibits the characteristics of non-equilibrium transport, and the sediment transport rate of rill flow gradually recovers along the flow direction by erosion. By employing the concept of partial equilibrium sediment transport from open channel hydraulics, a dynamic model of rill erosion on hillslopes was developed. In the model, a parameter, called the restoration coefficient of sediment transport capacity, was used to express the recovery process of sediment transport rate, which was analysed by dimensional analysis and determined from laboratory experimental data. The values of soil loss simulated by the model were in agreement with observed values. The model results showed that the length and gradient of the hillslope and rainfall intensity had different influences on rill erosion.
| Original language | English |
|---|---|
| Pages (from-to) | 1074-1084 |
| Number of pages | 11 |
| Journal | Hydrological Processes |
| Volume | 21 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 15 Apr 2007 |
| Externally published | Yes |
Keywords
- Dynamic model
- Non-equilibrium sediment transport
- Rill erosion rate
- Rills
- Sediment transport capacity