1. River Regimes
River regime – shows pattern of river discharge over a long period, usually a year
Important because they influence energy of a river, and therefore, processes and landforms
Variations can be spatial or temporal

2. Temporal variations (over time)
Short-term – following heavy rain, or snowmelt
Medium-term – seasonal, eg less discharge when interception is high in a deciduous woodland in summer
Long-term – eg as a result of climate change, or changes in land use

3. Spatial variations (between places)
Mainly a result of variations in vegetation and climate…
eg tropical rainforests, hot deserts, tundra regions

4. A river where a single rainstorm occurred
A river fed by a glacier in summer
A river in a region where there has been a long dry period and high PEVT
A river where a heavy rainstorm was followed by a rainstorm of less intensity and duration

5. Match regimes to rivers
Use an atlas to help you to locate the rivers on a world map
Describe the likely climate for each of the four areas
Explain the pattern shown in each of the regimes