River Discharge
- Created by: AbiM
- Created on: 23-02-14 14:19
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- River Discharge
- Volume of water passing a measuring point in a river at a given time
- Factors affecting river discharge
- Land use
- Quicker discharge on man-made sites. Decreased lag time.
- Lack of interception
- Quicker discharge on man-made sites. Decreased lag time.
- Shape, size of drainage basin
- Small, round - quicker to reach rivers
- Vegetation
- Higher interception, less discharge
- Geology; rock permeability
- Impermeable - higher discharge as higher densities of surface streams
- Precipitation; intensity and duration. Antecedent rainfall
- Heavy rain on saturated soil - steep rising limb - higher discharge
- More surface storage as water can't percolate
- Heavy rain on saturated soil - steep rising limb - higher discharge
- Land use
- Storm Hydrograph
- Shows changes in a river's discharge following a rain event.
- Lag time
- Time between peak rainfall and peak discharge
- Receding limb
- The decrease in discharge
- Base flow
- The normal river level
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