WATER - 1.6 Flashcards
What is a caliche?
A mineral deposit of gravel sand and nitrates
What is a water shed?
An area or ridge of land that separates waters flowing to different rivers or basins
How does latitude affect climate?
The further from the equator (higher latitude), the colder the climate.
What does the annual flow rate of a river depend on ?
Latitude and topography
What is a river regime ?
The annual variation in the discharge of a river at a particular point
Channel flow is changed by …
Global patterns of precipitation and evaporation
What factors affect river regimes?
Seasonal climate Geology Basin size Soil Vegetation cover Human activity
What % of the Yukon river is covered with permafrost ?
50-90%
What are the characteristics of a river regime with a large drainage basin?
A complex regime and cross climate zones
Eg blue/white Nile
What can increase the complexity of a river regime?
Mountains
Eg glaciated mountains store water
How can deep soil affect a river regime?
They store more water so the regime is steadier
How does geology affect the river regime ?
An impervious aquifer stores water that can be readily available
The Yukon is in a temperate climate with low latitude. True or false?
False
It is sub arctic, high latitude
The Yukon has small changes in its water budget due to…
Limited evaporation and precipitation
The Yukon river regime is dependent on…
Glacial melt and discontinuous permafrost from its mountainous environment
