Description
River Self-Purification: Streeter-Phelps Method
Performs a self-purification calculation using the Streeter-Phelps model, which simulates the oxygen dynamics and BOD (Biochemical Oxygen Demand) in a river. This method calculates the degradation of organic matter and the oxygen replenishment through reaeration over a specific river length, helping in assessing water quality.
Input Parameters
| Parameter | Default Units | Description |
|---|
| Flow | m3/s | Water flow rate |
| Cross section area | m2 | Cross-sectional area of the river |
| River length | km | Length of the river |
| Upstream BOD | mg/L | Biochemical oxygen demand at upstream |
| Upstream dissolved oxygen | mg/L | Dissolved oxygen concentration upstream |
| Temperature | °C | Water temperature (default: 20°C) |
| Deoxygenation constant | d−1 | Rate of oxygen consumption |
| Reaeration constant | d−1 | Rate of oxygen replenishment |
Output Parameters
| Parameter | Default Units | Description |
|---|
| Flow | m3/s | Output water flow rate |
| Downstream dissolved oxygen | mg/L | Oxygen concentration at the downstream point |
| Downstream BOD | mg/L | BOD at the downstream point |
| Critical dissolved oxygen concentration | mg/L | Minimum dissolved oxygen concentration |
| Critical length | km | River length where oxygen reaches a minimum |
| Concentrations table | - | Table of dissolved oxygen along the river |