Summary Hydrology and fluvial geomorphology A* revision notes for CIE A level Geography
45 views 0 purchase
Course
Unit 1 - Core Geography
Institution
CIE
Book
Cambridge International AS and A Level Geography second edition
Thorough revision notes for the 'Hydrology and fluvial geomorphology' component of CIE AS core physical geography, with case study detail included at relevant points. The notes have been constructed by referencing Garrett Nagle and Paul Guinness' revision guide for the course, as well as class note...
Chapter 1 (excluding river flood case study at end of 1.4)
May 26, 2024
10
2023/2024
Summary
Subjects
revision
rivers
a level
drainage basin
hydrographs
discharge
precipitation
river landforms
river processes
erosion
hydraulic action
abrasion
cavitation
river transport
deposition
sediment
velocity
eva
Connected book
Book Title:
Author(s):
Edition:
ISBN:
Edition:
More summaries for
Settlement A* revision notes for CIE A level Geography
Migration A* revision notes for CIE A level Geography
Population A* revision notes for CIE A level Geography
All for this textbook (4)
Written for
A/AS Level
CIE
Geography
Unit 1 - Core Geography
All documents for this subject (66)
Seller
Follow
jhawks121
Content preview
Hydrology
Drainage system notes:
- Amount of interception dependent on leaf size, time of
year, deciduous vs coniferous.
- Soil moisture increases with addition of organic matter
(leaf drop).
- Overland flow can occur on ground baked hard by a
drought, on steep ground, on frozen ground, on tarmac,
in areas of impermeable rock (e.g. granite), and where
ppt intensity > infiltration capacity (Hortonian OLF).
- Infiltration capacity is influenced by duration of rainfall,
antecedent soil moisture, soil porosity, vegetation
cover, raindrop size, and slope angle.
- Percolation is the subsequent downwards movement of
water through the soil to the bedrock after infiltration.
- Groundwater flow is beneath water table.
- Baseflow is year-round, slow flow of water that explains
why major rivers don’t dry up during long hot summers.
- Beneath the water table all pore spaces are full
(saturation).
- Recharge involves rising of the water table after a dry
spell (refilling of water in pores).
- Springs occur on saturated ground and involve
exfiltration.
, How storm hydrographs are affected by drainage basin
size/shape:
- LARGE drainage basin = higher discharge, but longer lag
time.
- LONG and THIN drainage basin = delayed response.
- CIRCULAR drainage basin = more rapid response.
- STEEP RELIEF = FLASHY response and higher peak
discharge as no/limited time for rainwater to infiltrate,
so rapid SRO likely.
- HIGH RAINFALL INTENSITY = FLASHY response as
precipitation intensity is greater than infiltration
capacity, so not all rain can be infiltrated, leading to
Hortonian OLF.
- WET PREVIOUS CONDITIONS = FLASHY response as pore
spaces full and ground is saturated, so no infiltration and
all SRO.
- HIGHLY URBANISED catchment = FLASHY response as
tarmac etc. is impermeable (leading to SRO) and storm
drains transfer water rapidly to rivers (high drainage
density).
- PPT IN FORM OF SNOW = DELAYED, then SUDDEN
response (water held in storage as snow, then melting
causes sudden SRO). Can cause flooding.
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 EFT, 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 this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller jhawks121. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R111,72. You're not tied to anything after your purchase.
