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

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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. Temporal variations (over time). - PowerPoint PPT Presentation

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Page 1: River Regimes

River RegimesRiver Regimes

River regime – shows pattern of river discharge River regime – shows pattern of river discharge over a long period, usually a yearover a long period, usually a year

Important because they influence energy of a Important because they influence energy of a river, and therefore, processes and landformsriver, and therefore, processes and landforms

Variations can be Variations can be spatialspatial or or temporaltemporal

Page 2: River Regimes

Temporal variations (over time)Temporal variations (over time)

Short-term – following heavy rain, or snowmeltShort-term – following heavy rain, or snowmelt

Medium-term – seasonal, eg less discharge Medium-term – seasonal, eg less discharge when interception is high in a deciduous when interception is high in a deciduous woodland in summerwoodland in summer

Long-term – eg as a result of climate change, Long-term – eg as a result of climate change, or changes in land useor changes in land use

Page 3: River Regimes

Spatial variations (between places)Spatial variations (between places)

Mainly a result of variations in vegetation and Mainly a result of variations in vegetation and climate…climate…

eg tropical rainforests, hot deserts, tundra eg tropical rainforests, hot deserts, tundra regionsregions

Page 4: River Regimes

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

Page 5: River Regimes

1.1.Match regimes to riversMatch regimes to rivers

2.2.Use an atlas to help you to locate the rivers Use an atlas to help you to locate the rivers on a world mapon a world map

3.3.Describe the likely climate for each of the Describe the likely climate for each of the four areasfour areas

4.4.Explain the pattern shown in each of the Explain the pattern shown in each of the regimesregimes

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