100% tevredenheidsgarantie Direct beschikbaar na je betaling Lees online óf als PDF Geen vaste maandelijkse kosten
logo-home
EESA07 Final Exam Notes $10.49
In winkelwagen

College aantekeningen

EESA07 Final Exam Notes

 1 keer verkocht
  • Vak
  • Instelling
  • Boek

These notes are specifically tailored to the EESA07 Final Examination! Good Luck!

Voorbeeld 3 van de 23  pagina's

  • 13 januari 2020
  • 23
  • 2017/2018
  • College aantekeningen
  • Dr. jovan stefanoic
  • Alle colleges
avatar-seller
EESA07 Hassan Alibhai
Final Exam Notes Page 1

Administration

Location and Time Lecture Material Textbook Material
th
December 15 (2-4 PM) 5,6,7,8,9, and 10 4, 5, 6, 7, 8, 9, (pgs 200-202) and
IC 220 11 (pgs 223-229) 12, 13

Lecture 5: Excess Water and Water Scarcity

Floods
• Post-flood analysis factors
◦ One other major factor => sediment type and availability

Intensity and Duration of Precipitation Land Use (CONT PG 10-11) Engineering Modifications
• High Intensity Short Duration: • Urban vs Rural • Structural approach
Large amount of precipitation • Urban Floods to floodplain
falls in a very short period of ◦ Network of storm management
time (flash flood) sewers ◦ Leeves
• Low Intensity Long Duration: ◦ Basements ◦ Concrete
Large amount of precipitation ◦ Backups of storm floodwalls
falls steadily over a long period or sanitary sewers ◦ Floodways
of time ◦ No direct (example: Red
• Rain vs Snow connection to River floodway
◦ Rain-snow flooding: rain rivers, flooding in Winnipeg)
falls on snow cover and caused by rain ◦ Dams
cannot infiltrate into frozen • Coastal Floods ◦ Channelization
soils ◦ Storm surges-
• Hurricanes? seawater driven by SEE PAGE 3 BOTTOM
◦ Hazel (1994) high winds, often OF PAGE 10 FOR MORE
◦ Katrina (2005) accompanied by DETAILS
• Monsoons (Pakistan – 2010) tsunamis.

• Flood Frequency

◦ Flood events are assumed to occur randomly, following the laws of probability
m 1 n+1
▪ EP= and T = =
n+1 P m
• EP is the exceedence probability (the chance that a discharge will be exceeded)
• T is the recurrence interval (the average time between floods of a certain discharge)
• m is the rank of the flood, where the highest flow is given a rank of 1
• n is the number of years on record.
◦ 100 year flood => a flood that will occur every hundred years, or 1% chance “every year”
◦ Discharge vs Recurrence Interval can be graphed to estimate the magnitude of a flood
◦ The flow of a river can also be graphed against the annual probability of exceedance (as a
percentage) and less common floods are to the right of this graph.

,EESA07 Hassan Alibhai
Final Exam Notes Page 2




• Two key weaknesses to predicting flood intensity by using past frequency

1. Available hydrologic data often shorter than required to make accurate predictions. For
example, to predict a hundred year flood, flood data needs to be calculated consistently for
a minimum of fifty years, which usually doesn’t happen

2. The past is a good guide to the future – which is generally untrue, especially because of
how much our world has changed since the industrial revolution. The 100- year flood is a
moving target, which means we have no good way to calculate it.

• Alternative => probable maximum flood (the maximum flood that is likely to occur in a given
area under the most extreme conditions)

Flooding Impacts and Trends

• Loss of life and property damage => disease,
water supply contamination, mud damage
• Munich Re. And Dartmouth Flood
Observarory => Increasing trend in annual
numbers of high magnitude floods
• Reasons
◦ Climate change
◦ More people and property on flood-prone
areas (mostly floodplains)

Minimizing Flood Hazards

• Non-structural approach
◦ No people and structures in the floodplain => no economic damage
◦ Outcome Risk = (likelihood of a flood)(consequences)
• Structural approach
◦ Levees, concrete floodwalls, floodways, dams, channelization

, EESA07 Hassan Alibhai
Final Exam Notes Page 3

Structural flood hazard minimization Non-structural flood hazard minimization
• Levees • Control of floodplain development via
◦ New Orleans is protected by levees so land use decisions
that the Mississippi River now stands 4 ◦ Government dictates that floodplains
metres above the downtown area must be established where
development is not permitted
(regardless of residential or
commercial)




◦ Water ends up flowing faster and
deeper beyond a levee, causing
flooding both upstream and
downstream
• Floodway
◦ Red river has flooded so many times
that there’s now a floodway to protect ◦ Government also subsidizes flood
it from downtown Winnipeg insurance for older buildings
• Certain areas will be periodically flooded




• Streams can be channelized (flow straight)

Dit zijn jouw voordelen als je samenvattingen koopt bij Stuvia:

Bewezen kwaliteit door reviews

Bewezen kwaliteit door reviews

Studenten hebben al meer dan 850.000 samenvattingen beoordeeld. Zo weet jij zeker dat je de beste keuze maakt!

In een paar klikken geregeld

In een paar klikken geregeld

Geen gedoe — betaal gewoon eenmalig met iDeal, creditcard of je Stuvia-tegoed en je bent klaar. Geen abonnement nodig.

Direct to-the-point

Direct to-the-point

Studenten maken samenvattingen voor studenten. Dat betekent: actuele inhoud waar jij écht wat aan hebt. Geen overbodige details!

Veelgestelde vragen

Wat krijg ik als ik dit document koop?

Je krijgt een PDF, die direct beschikbaar is na je aankoop. Het gekochte document is altijd, overal en oneindig toegankelijk via je profiel.

Tevredenheidsgarantie: hoe werkt dat?

Onze tevredenheidsgarantie zorgt ervoor dat je altijd een studiedocument vindt dat goed bij je past. Je vult een formulier in en onze klantenservice regelt de rest.

Van wie koop ik deze samenvatting?

Stuvia is een marktplaats, je koop dit document dus niet van ons, maar van verkoper hassanalibhai. Stuvia faciliteert de betaling aan de verkoper.

Zit ik meteen vast aan een abonnement?

Nee, je koopt alleen deze samenvatting voor $10.49. Je zit daarna nergens aan vast.

Is Stuvia te vertrouwen?

4,6 sterren op Google & Trustpilot (+1000 reviews)

Afgelopen 30 dagen zijn er 69252 samenvattingen verkocht

Opgericht in 2010, al 15 jaar dé plek om samenvattingen te kopen

Begin nu gratis

Laatst bekeken door jou


$10.49  1x  verkocht
  • (0)
In winkelwagen
Toegevoegd