Class Notes (923,005)
CA (543,042)
UTSC (32,990)
EESB18H3 (36)
Lecture

Should contain everything covered in lecture

5 Pages
90 Views

Department
Environmental Science
Course Code
EESB18H3
Professor
Jovan Stefanovic

This preview shows pages 1-2. Sign up to view the full 5 pages of the document.
Lecture Six
x Precipitation
o Precipitation measured in mm
For example 20mm of rain would mean in 1 m2 there would be
20 L of rain, or that the thickness of the amount of rain that fell
is 20mm
o High Intensity & Short Duration Large amount of precipitation
falling in a very short time can create flash floods
o Lower Intensity & Long Duration Large amount of precipitation falls
steadily over a longer time
o Hurricanes
Ex: Hazel in 1954 or Katrina in 2005
o Monsoon
Ex: Pakistani floods began in July 2010 following heavy
monsoon rains
x Watershed (Drainage Basin)
o The upstream area from which surface water flows towards the
channel
o Drainage Divide Topographic line or boundary separating
watersheds
x 99.9% of all rivers flow only to one ocean/sea/etc.
o One exception is Two Ocean
Creek in Kicking Horse Pass
x River Flow and Sediment Transport
o Discharge Q (m3/s)
Measured volume of water
flowing past a cross section
of a river in a given amount
of time.
o Water flows fastest at top of
river due to decreased
friction.
o Hydrograph A graph of how
discharge changes over time.
Can show how long
flooding is and when
the peak of it is
o Stream Gradient & Floodplains
Gradient Slope of the river channel; typically decreases
downstream
Floodplain relatively flat lowland that borders a river, usually
dry but subject to flooding
www.notesolution.com
Base Level an elevation that a stream cannot erode,
controlled by level of the body of water that the stream
discharges into.
x Ex: Level of lake Ontario is local base level for Highland
River, and the level of the ocean that lake Ontario
deposits to is the ultimate base level.
x Two General Types
o Ultimate sea (ocean) level
o Temporary/Local Lakes, main streams
x Changing causes readjustment of the stream
o Rising Base (ocean & sea) level deposition
o Lowering base level erosion
o Work of streams
x Erosion
x Transportation transported materials is called the
ï
x Materials Transported
o Suspended Load finer particles, such as clay,
silt, and fine sand, carried in suspension
o Bedload heavier sediment in a stream that is
moved along the streambed rather than in
suspension.
o Dissolved Load derived from chemical weather
of rocks.
o Alluvial Fan A fan-shaped deposit of sand and gravel at the mouth of
a mountain canyon, where the
stream gradient flattens at the
main valley floor.
o Delta Accumulation of
sediment deposited by a river at
its entrance into a large water
bode (ocean, sea, or lake)
o Natural Levees Form as the
flood waters deposit sediment
on the edge of the channel
where the velocity is lower than
in the channel
o Alluvial Channels Rivers that
flow in their own deposits
Alluvium
Unconsolidated sediment
of relatively recent
geologic age that was
deposited by flowing water
x River Classification and Flooding
www.notesolution.com

Loved by over 2.2 million students

Over 90% improved by at least one letter grade.

Leah — University of Toronto

OneClass has been such a huge help in my studies at UofT especially since I am a transfer student. OneClass is the study buddy I never had before and definitely gives me the extra push to get from a B to an A!

Leah — University of Toronto
Saarim — University of Michigan

Balancing social life With academics can be difficult, that is why I'm so glad that OneClass is out there where I can find the top notes for all of my classes. Now I can be the all-star student I want to be.

Saarim — University of Michigan
Jenna — University of Wisconsin

As a college student living on a college budget, I love how easy it is to earn gift cards just by submitting my notes.

Jenna — University of Wisconsin
Anne — University of California

OneClass has allowed me to catch up with my most difficult course! #lifesaver

Anne — University of California
Description
Lecture Six N Precipitation o Precipitation measured in mm For example 20mm of rain would mean in 1 m there would be 20 L of rain, or that the thickness of the amount of rain that fell is 20mm o High Intensity & Short Duration Large amount of precipitation falling in a very short time can create flash floods o Lower Intensity & Long Duration Large amount of precipitation falls steadily over a longer time o Hurricanes Ex: Hazel in 1954 or Katrina in 2005 o Monsoon Ex: Pakistani floods began in July 2010 following heavy monsoon rains N Watershed (Drainage Basin) o The upstream area from which surface water flows towards the channel o Drainage Divide Topographic line or boundary separating watersheds N 99.9% of all rivers flow only to one oceanseaetc. o One exception is Two Ocean Creek in Kicking Horse Pass N River Flow and Sediment Transport o Discharge Q (m s) Measured volume of water flowing past a cross section of a river in a given amount of time. o Water flows fastest at top of river due to decreased friction. o Hydrograph A graph ofhow discharge changes over time. Can show how long flooding is and when the peak of it is o Stream Gradient & Floodplains Gradient Slope of the river channel; typically decreases downstream Floodplain relatively flat lowland that bordersa river, usually dry but subject to flooding www.notesolution.com
More Less
Unlock Document


Only pages 1-2 are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


OR

Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit