These IB HL Geography Notes cover all aspects of the syllabus for the Unit 1 topic Freshwater. They are typed, organised, include diagrams and graphs, and are for the new specification, first examinations in 2019.
Case studies Notes for IB Geography Option G: Urban environments
Learn to do list for IB Geography Unit 1: Changing population
All for this textbook (25)
Written for
IB
IB Geography
Unit 1 - Freshwater
All documents for this subject (1)
Seller
Follow
MargauxG
Reviews received
Content preview
Freshwater
The drainage basin as an open system with inputs (precipitation of varying type and
intensity), outputs (evaporation and transpiration), flows (infiltration, throughflow,
overland flow and base flow) and stores (including vegetation, soil, aquifers and the
cryosphere)
Drainage basin:
An area within which water supplied by precipitation is transferred to the ocean,
lake or larger stream
Includes all of the area that is drained by a river and its tributaries
Divided by watersheds, imaginary lines separating adjacent basins
Some rivers drain into the sea but others drain into an inland depression - these
drainage basins are endorheic or closed (e.g. Okovango)
Open system as it allows movement of energy and matter across its boundaries
Hydrological cycle: cycle of water between the biosphere, atmosphere, lithosphere
and hydrosphere
Inputs:
Precipitation: includes all forms of rainfall, snow, frost, hail and dew
Conversion and transfer of moisture in the atmosphere to the land
Main characteristics of precipitation affecting hydrology:
o Total amount of precipitation
o Intensity
o Type (snow, rain etc.)
o Geographic distribution
o Variability
Other inputs: irrigation water, water transfer schemes, desalinated water
Outputs:
Evaporation:
Process by which a liquid or solid is changed into a gas
Most important from oceans and seas
Increases under warm, dry conditions and decreases under cold, calm conditions
Factors affecting evaporation:
o Temperature
o Humidity
o Wind speed
o Amount of water available
o Vegetation cover
o Colour of the surface/albedo
Evapotranspiration (EVT):
Combined effect of evaporation and transpiration (water vapour escaping from living
plants)
Most important aspect of water loss, nearly 100% of annual precipitation in arid
areas and 75% in humid areas
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller MargauxG. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $5.87. You're not tied to anything after your purchase.
