What is a complex river regime?

A complex regime shows several peaks and troughs during the year. Large basins draw water from tributaries in different climatic and relief zones.

Give an example of a river with a snowmelt-dominated regime.

The Rhône has a strong summer peak fed by Alpine snow and glacier melt. Discharge falls to a minimum in winter when precipitation is locked up as snow.

Give an example of a monsoon regime.

The Ganges peaks sharply between July and September when the summer monsoon delivers most of the year's rain. Discharge falls to a fraction of that level in the dry season.

How does climate control a river regime?

The seasonal distribution of precipitation sets the timing of high and low flows. Temperature governs how much is lost to evaporation and whether precipitation falls as snow.

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Water and Carbon Cycles

River regimes and the factors that control them

2 things to know
Component 2

Overview

River regime, river with a snowmelt-dominated regime and monsoon regime.

What you need to know

Answer each one before you reveal it.

Your recallNot started

Key term

Define a river regime.

Key term

What is a simple river regime?

Questions from this subtopic

Each one with the model answer underneath.

1
Define a river regime.
Model answer
A river regime is the pattern of discharge variation over the course of a year. Monthly mean discharge figures are used to describe it.
2
What is a simple river regime?
Model answer
A simple regime has a single peak and a single low period each year. One dominant control, such as monsoon rain or spring snowmelt, produces the pattern.
3
What is a complex river regime?
Model answer
A complex regime shows several peaks and troughs during the year. Large basins draw water from tributaries in different climatic and relief zones.
4
Give an example of a river with a snowmelt-dominated regime.
Model answer
The Rhône has a strong summer peak fed by Alpine snow and glacier melt. Discharge falls to a minimum in winter when precipitation is locked up as snow.
5
Give an example of a monsoon regime.
Model answer
The Ganges peaks sharply between July and September when the summer monsoon delivers most of the year's rain. Discharge falls to a fraction of that level in the dry season.
6
How does climate control a river regime?
Model answer
The seasonal distribution of precipitation sets the timing of high and low flows. Temperature governs how much is lost to evaporation and whether precipitation falls as snow.

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